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The following document contains information on Cypress products.
MB39C831
Ultra Low Voltage Boost Power Management IC
for Solar/Thermal Energy Harvesting
Data Sheet (Full Production)
Notice to Readers: This document states the current technical specifications regarding the Spansion
product(s) described herein. Spansion Inc. deems the products to have been in sufficient production volume
such that subsequent versions of this document are not expected to change. However, typographical or
specification corrections, or modifications to the valid combinations offered may occur.
Publication Number MB39C831_DS405-00014
CONFIDENTIAL
Revision 4.0
Issue Date January 30, 2015
D a t a S h e e t
Notice On Data Sheet Designations
Spansion Inc. issues data sheets with Advance Information or Preliminary designations to advise readers of
product information or intended specifications throughout the product life cycle, including development,
qualification, initial production, and full production. In all cases, however, readers are encouraged to verify
that they have the latest information before finalizing their design. The following descriptions of Spansion
data sheet designations are presented here to highlight their presence and definitions.
Advance Information
The Advance Information designation indicates that Spansion Inc. is developing one or more specific
products, but has not committed any design to production. Information presented in a document with this
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Inc. therefore places the following conditions upon Advance Information content:
“This document contains information on one or more products under development at Spansion Inc.
The information is intended to help you evaluate this product. Do not design in this product without
contacting the factory. Spansion Inc. reserves the right to change or discontinue work on this
proposed product without notice.”
Preliminary
The Preliminary designation indicates that the product development has progressed such that a commitment
to production has taken place. This designation covers several aspects of the product life cycle, including
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before full production is achieved. Changes to the technical specifications presented in a Preliminary
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places the following conditions upon Preliminary content:
“This document states the current technical specifications regarding the Spansion product(s)
described herein. The Preliminary status of this document indicates that product qualification has
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process that require maintaining efficiency and quality, this document may be revised by subsequent
versions or modifications due to changes in technical specifications.”
Combination
Some data sheets contain a combination of products with different designations (Advance Information,
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Characteristics table and the AC Erase and Program table (in the table notes). The disclaimer on the first
page refers the reader to the notice on this page.
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When a product has been in production for a period of time such that no changes or only nominal changes
are expected, the Preliminary designation is removed from the data sheet. Nominal changes may include
those affecting the number of ordering part numbers available, such as the addition or deletion of a speed
option, temperature range, package type, or VIO range. Changes may also include those needed to clarify a
description or to correct a typographical error or incorrect specification. Spansion Inc. applies the following
conditions to documents in this category:
“This document states the current technical specifications regarding the Spansion product(s)
described herein. Spansion Inc. deems the products to have been in sufficient production volume
such that subsequent versions of this document are not expected to change. However,
typographical or specification corrections, or modifications to the valid combinations offered may
occur.”
Questions regarding these document designations may be directed to your local sales office.
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MB39C831_DS405-00014-4v0-E, January 30, 2015
MB39C831
Ultra Low Voltage Boost Power Management IC
for Solar/Thermal Energy Harvesting
Data Sheet (Full Production)
1. Description
The MB39C831 is the high-efficiency synchronous rectification boost DC/DC converter IC which efficiently
supplies energy getting from the solar cell with the single cell or multiple cells, or from the thermoelectric
generator (TEG) to the Li-ion battery.
It contains the function to control the DC/DC converter output following the maximum power point of the
solar cell (MPPT: Maximum Power Point Tracking) and the protection function to charge the Li-ion battery
safely.
It is possible to start-up from 0.35V using the low-voltage process and adapts the applications which the
single cell solar cell is treated as the input.
2. Features








Operation input voltage range : 0.3V to 4.75V
Output voltage adjustment range : 3.0V to 5.0V
Minimum input voltage at start-up : 0.35V
Quiescent Current (No load) : 41 μA
Input peak current limit : 200 mA
Built-in MPPT
Charge voltage to the Li-ion battery/current protection function built in
Improvement of the efficiency during the low-output power according to the auto PFM/PWM switching
mode
3. Applications









Solar energy harvesting
Thermal energy harvesting
Li-ion battery using the single cell or multiple cells' solar cell/Super Capacitor Charger
Portable audio players
Cellular phone
eBook
Electronic dictionary
Wireless remote controllers
Sensor node
Online Design Simulation
Easy DesignSim
This product supports the web-based design simulation tool.
It can easily select external components and can display useful information.
Please access from the following URL.
http://www.spansion.com/easydesignsim/
Publication Number MB39C831_DS405-00014
Revision 4.0
Issue Date January 30, 2015
This document states the current technical specifications regarding the Spansion product(s) described herein. Spansion Inc. deems the products to have been in sufficient
production volume such that subsequent versions of this document are not expected to change. However, typographical or specification corrections, or modifications to the
valid combinations offered may occur.
CONFIDENTIAL
D a t a S h e e t
Table of Contents
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
Description ..................................................................................................................................... 3
Features ......................................................................................................................................... 3
Applications .................................................................................................................................... 3
Pin Assignments ............................................................................................................................. 6
Pin Descriptions.............................................................................................................................. 7
Block Diagram ................................................................................................................................ 8
Absolute Maximum Ratings ............................................................................................................ 9
Recommended Operating Conditions........................................................................................... 10
Electrical Characteristics .............................................................................................................. 11
9.1
Electrical Characteristics of Constant Voltage Mode ......................................................... 11
9.2
Electrical Characteristics of Charge Mode ........................................................................ 12
9.3
Electrical Characteristics of Boost DC/DC Converter ........................................................ 12
Function........................................................................................................................................ 13
10.1 Outline of Operation .......................................................................................................... 13
10.2 Start-up/Shut-down Sequence .......................................................................................... 14
10.3 MPPT Control .................................................................................................................... 16
10.4 Function Description.......................................................................................................... 18
Typical Applications Circuit ........................................................................................................... 21
Application Notes.......................................................................................................................... 24
Typical Characteristics ................................................................................................................. 26
Layout for Printed Circuit Board ................................................................................................... 31
Usage Precaution ......................................................................................................................... 32
Ordering Information..................................................................................................................... 32
Marking ......................................................................................................................................... 32
Product Labels.............................................................................................................................. 33
Recommended Mounting Conditions............................................................................................ 36
Package Dimensions .................................................................................................................... 37
Major Changes ............................................................................................................................. 38
Figures
Figure 4-1 Pin Assignments ....................................................................................................................... 6
Figure 6-1 Block Diagram ........................................................................................................................... 8
Figure 7-1 Power Dissipation – Operating Ambient Temperature ............................................................... 9
Figure 10-1 Start-up/Shut-down Sequences of Constant Voltage Mode (MPPT_ENA=L, ENA=H) ......... 14
Figure 10-2 Start-up/Shut-down Sequences of Charge Mode (MPPT_ENA = H, ENA=H) ....................... 15
Figure 10-3 MPPT Control........................................................................................................................ 16
Figure 10-4 MPPT Operation ................................................................................................................... 17
Figure 11-1 Application Circuit of Constant Voltage Mode (MPPT_ENA = L, ENA = H) ........................... 21
Figure 11-2 Application Circuit of Charge Mode (MPPT_ENA = H, ENA = H) .......................................... 22
Figure 12-1 Example of Energy Harvesting System ................................................................................. 25
Figure 13-1 Typical Characteristics of Constant Voltage Mode (MPPT_ENA = L, ENA = H) .................... 26
Figure 13-2 Switching Waveforms of Constant Voltage Mode (MPPT_ENA = L, ENA = H) ..................... 29
Figure 13-3 Typical Characteristics of Charge Mode (MPPT_ENA = H, ENA = H) ................................... 30
Figure 13-4 Waveforms of VDD Pin Voltage in Charge Mode (MPPT_ENA = H, ENA = H) ..................... 30
Figure 14-1 Example of a Layout Design ................................................................................................. 31
Figure 17-1 Marking ................................................................................................................................. 32
Figure 18-1 Inner Box Label [Q-Pack Label (4 × 8.5inch)] ....................................................................... 33
Figure 18-2 Al(Aluminum) Bag Label [2-in-1 Label (4 × 8.5inch)] ............................................................. 34
Figure 18-3 Reel Label [Reel Label (4 × 2.5inch)] .................................................................................... 35
Figure 18-4 Reel Label [Dry Pack & Reel Label (4 × 2.5inch)] ................................................................. 35
Figure 18-5 Outer Box Label [Shopping Label (4 × 8.5inch)] ................................................................... 35
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Figure 19-1 Recommended Mounting Conditions .................................................................................... 36
Tables
Table 5-1 Pin Descriptions .......................................................................................................................... 7
Table 7-1 Absolute Maximum Ratings ........................................................................................................ 9
Table 8-1 Recommended Operating Conditions ....................................................................................... 10
Table 9-1 Electrical Characteristics of Constant Voltage Mode (MPPT_ENA = L, ENA = H) ..................... 11
Table 9-2 Electrical Characteristics of Charge Mode (MPPT_ENA = H, ENA = H) ................................... 12
Table 9-3 Electrical Characteristics of Boost DC/DC Converter ............................................................... 12
Table 10-1 Mode Control .......................................................................................................................... 18
Table 10-2 Changing Preset Output Voltage in Constant Voltage Mode (MPPT_ENA = L, ENA = H) ...... 18
Table 10-3 Changing MPPT Setting in Charge Mode (MPPT_ENA = H, ENA = H) .................................. 18
Table 10-4 Stage Notification of Constant Voltage Mode (MPPT_ENA = L, ENA = H) ............................. 20
Table 10-5 Stage Notification of Charge Node (MPPT_ENA = H, ENA = H) ............................................ 20
Table 11-1 Parts List ................................................................................................................................. 23
Table 12-1 Manufactures of Capacitors .................................................................................................... 24
Table 16-1 Ordering Information ............................................................................................................... 32
Table 19-1 Recommended Mounting Conditions ...................................................................................... 36
Table 19-2 Recommended Mounting Conditions (J-STD-020D) .............................................................. 36
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4. Pin Assignments
Figure 4-1 Pin Assignments
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
(TOP VIEW)
40
39
38
37
36
35
34
33
32
31
28
PGND1
ENA
4
27
VDD
MPPT_ENA
5
26
DET0
SGND1
6
25
DET1
SGND3
7
24
VCC
N.C.
8
23
N.C.
N.C.
9
22
SGND2
N.C.
10
21
FB
11
12
13
14
15
16
17
18
19
20
VOUT_S
3
PGND2
S0
LX
VST
VOUT
29
MPPT_IN
2
CSH2
S1
MPPT_OUT
N.C.
CSH1
30
CSH0
１
N.C.
S2
(QFN_40PIN)
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5. Pin Descriptions
Table 5-1 Pin Descriptions
Pin No.
Pin Name
I/O
1
S2
I
Input pin for preset output voltage setting and MPPT setting
2
S1
I
Input pin for preset output voltage setting and MPPT setting
3
S0
I
Input pin for preset output voltage setting and MPPT setting
4
ENA
I
DC/DC converter control input pin
5
MPPT_ENA
I
MPPT control input pin
6
SGND1
-
Analog ground pin
7
SGND3
-
Analog ground pin
8, 9, 10, 11
N.C.
-
Non connection pins (Leave these pins open.)
12
CSH0
O
Capacitor connection pin for MPPT, used only at the charge mode
13
CSH1
I
Capacitor connection pin for MPPT, used only at the charge mode
14
CSH2
I
Capacitor connection pin for MPPT, used only at the charge mode
15
MPPT_OUT
O
MPPT output pin, used only at the charge mode
16
MPPT_IN
I
MPPT input pin, used only at the charge mode
17
VOUT
O
Output pin of DC/DC converter
18
LX
I
Inductor connection pin
19
PGND2
-
Power ground pin
20
VOUT_S
I
Input pin for DC/DC converter FB
21
FB
I
Feedback input pin of DC/DC converter
22
SGND2
-
DC/DC control system ground pin
23
N.C.
-
Non connection pin (Leave this pin open.)
24
VCC
O
Control system power supply output pin
25
DET1
O
Output pin for state notification
26
DET0
O
Output pin for state notification
27
VDD
I
External power supply input pin
28
PGND1
-
Power ground pin
29
VST
O
Start-up power supply output pin
N.C.
-
Non connection pins (Leave these pins open.)
30, 31, 32, 33, 34, 35,
36, 37, 38, 39, 40
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Description
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6. Block Diagram
Figure 6-1 Block Diagram
L1
C1
LX
VST
VCC
VDD
VDD voltage
detector
(UVLO)
Start-Up
VCC voltage
detector
Boost DC/DC Converter
VCC
VOUT voltage
detector
SW2
PFM/PWM
Controler
C2
C3
C9
(*1)
Li-ion
Battery
FB
LOGIC
MPPT
Controler
CSH1
C6
C5
MPPT_OUT
R3
MPPT_IN
VCC
C7
D2
DET0
DET1
BGR
C8
C11
VOUT
VOUT_S
VOUT-VDD
voltage
inversion
detector
CSH2
MPPT_ENA
ENA
S0
S1
S2
D1
VCC
SW1
CSH0
VDD
C4
R1
R2
C10
*1: Connect the Li-ion battery in the charge mode (refer to Figure 11-2)
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7. Absolute Maximum Ratings
Table 7-1 Absolute Maximum Ratings
Parameter
Symbol
VDD input voltage
VDDMAX
VOUT input voltage
Rating
Condition
VOUTMAX
Max
VDD pin
-0.3
+7.0
V
VOUT, VOUT_S pins
-0.3
+7.0
V
-0.3
voltage +0.3
MPPT_ENA, ENA,
Input pin input voltage
VINPUTMAX
VCC pin
S2, S1, S0,
CSH0, CSH1, CSH2,
PD
Storage temperature
Ta ≤ +25°C
TSTG
V
( ≤ +7.0)
MPPT_IN, MPPT_OUT pins
Power dissipation
Unit
Min
-
-
2500(*1)
-55
+125
mW
o
C
ESD voltage1
VESDH
Human Body Model
-2000
+2000
V
ESD voltage2
VESDM
Machine Model
-200
+200
V
o
*1: In the case of θ ja (wind speed 0m/s) +28 C/W
Figure 7-1 Power Dissipation – Operating Ambient Temperature
Power dissipation [W]
3.0
2.5
2.0
1.5
1.0
0.5
0.0
-50
-25
0
25
50
75
100
Temperature [℃]
WARNING:
1. Semiconductor devices may be permanently damaged by application of stress (including, without
limitation, voltage, current or temperature) in excess of absolute maximum ratings. Do not exceed any of
these ratings.
January 30, 2015, MB39C831_DS405-00014-4v0-E
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8. Recommended Operating Conditions
Table 8-1 Recommended Operating Conditions
Parameter
VDD input voltage
Symbol
VVDD
VOUT input voltage
VVOUT
Input pin input voltage
VINPUT
Operating ambient
temperature
Ta
Condition
VDD pin
VOUT pin
MPPT_ENA=H, ENA=H
MPPT_ENA, ENA,
S2, S1, S0 pins
-
Value
Unit
Min
Typ
Max
0.3
-
4.75
V
2.55
3
5.5
V
0
-
-40
-
VCC pin
voltage
+85
V
C
WARNING:
1. The recommended operating conditions are required in order to ensure the normal operation of the
semiconductor device. All of the device's electrical characteristics are warranted when the device is
operated under these conditions.
2. Any use of semiconductor devices will be under their recommended operating condition.
3. Operation under any conditions other than these conditions may adversely affect reliability of device and
could result in device failure
4. No warranty is made with respect to any use, operating conditions or combinations not represented on
this data sheet. If you are considering application under any conditions other than listed herein, please
contact sales representatives beforehand
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9. Electrical Characteristics
9.1
Electrical Characteristics of Constant Voltage Mode
Table 9-1 Electrical Characteristics of Constant Voltage Mode (MPPT_ENA = L, ENA = H)
(Ta=-40C to +85C, VDD ≤ VOUT - 0.25V, L=4.7µH, Cout=10µF)
Parameter
Symbol
Minimum input voltage
at start-up
Preset output voltage
Condition
MPPT_ENA
VSTART
VOUT
IQIN
Other
H
Unit
Min
Typ
Max
-
0.35
0.5
V
S2=L, S1=L, S0=L
2.940
3.000
3.060
V
S2=L, S1=L, S0=H
3.234
3.300
3.366
V
S2=L, S1=H, S0=L
3.528
3.600
3.672
V
S2=L, S1=H, S0=H
4.018
4.100
4.182
V
S2=H, S1=L, S0=L
4.410
4.500
4.590
V
S2=H, S1=L, S0=H
4.900
5.000
5.100
V
-
0.75
5(*1)
mA
-
32
64
µA
VDD pin, Ta = +25C
L
Current dissipation 1
ENA
Value
VDD, LX pin input current,
VDD=0.6V, VOUT=3.3V,
IOUT=0
Current dissipation 2
VCC detection voltage 1
VOUT detection voltage 1
IQOUT
VOUT pin input current,
VOUT=3.3V, IOUT=0
VCCDETH1
Upper threshold
2.8
2.9
3
V
VCCDETL1
Lower threshold
2.5
2.6
2.7
V
VOUTDETH1
Upper threshold
2.8
2.9
3
V
VOUTDETL1
Lower threshold
2.5
2.6
2.7
V
*1: This parameter is not be specified. This should be used as a reference to support designing the circuits.
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9.2
Electrical Characteristics of Charge Mode
Table 9-2 Electrical Characteristics of Charge Mode (MPPT_ENA = H, ENA = H)
(Ta=-40C to +85C, VDD ≤ VOUT - 0.25V, L=4.7µH, Cout=10µF)
Parameter
Symbol
Minimum input voltage
at start-up
MPPT setting
Condition
MPPT_ENA
ENA
VSTART
H
UVLO detection voltage
(VDD detection voltage)
VCC detection voltage 2
VOUT detection voltage 2
VOUT detection voltage 3
Other
H
IQOUT
Unit
Min
Typ
Max
-
0.35
0.5
V
S2=L, S1=L, S0=L
45
50
55
%
S2=L, S1=L, S0=H
50
55
60
%
S2=L, S1=H, S0=L
55
60
65
%
S2=L, S1=H, S0=H
60
65
70
%
S2=H, S1=L, S0=L
65
70
75
%
S2=H, S1=L, S0=H
70
75
80
%
S2=H, S1=H, S0=L
75
80
85
%
S2=H, S1=H, S0=H
80
85
90
%
-
41
82
µA
VDD pin, Ta = +25C
MPPTSET
Current dissipation 2
Value
VOUT pin input current,
VOUT=3.3V, IOUT=0
VUVLOH
Upper threshold
0.2(*1)
0.3(*1)
0.4(*1)
V
VUVLOL
Lower threshold
0.1
0.2
0.3
V
VCCDETH2
Upper threshold
2.5
2.6
2.7
V
VCCDETL2
Lower threshold
2.45
2.55
2.65
V
VOUTDETH2
Upper threshold
2.5
2.6
2.7
V
VOUTDETL2
Lower threshold
2.45
2.55
2.65
V
VOUTDETH3
Upper threshold
3.88
4
4.12
V
VOUTDETL3
Lower threshold
3.58
3.7
3.82
V
*1: This parameter is not be specified. This should be used as a reference to support designing the circuits.
9.3
Electrical Characteristics of Boost DC/DC Converter
Table 9-3 Electrical Characteristics of Boost DC/DC Converter
(Ta=-40C to +85C, VDD ≤ VOUT - 0.25V, L=4.7µH, Cout=10µF)
Parameter
LX peak current
Symbol
IOUT
Oscillation frequency
FOSC
Line regulation
VLINE
Load regulation
VLOAD
CONFIDENTIAL
MPPT_ENA
ENA
ILIMIN_A
Maximum output current
12
Condition
Value
Other
Typ
Max
-
200
‐
mA
VDD=0.6V, VOUT=3.3V
8
-
-
mA
VDD=3.0V, VOUT=3.3V
80
-
-
mA
0.87
1
1.13
MHz
-
-
0.5
%
-
-
0.5
%
LX pin input current
L or H
H
Unit
Min
PWM mode
0.4V ≤ VDD ≤ VOUT - 0.25V,
IOUT=0
VDD=0.6V, VOUT=3.3V,
IOUT=0 to 8mA
MB39C831_DS405-00014-4v0-E, January 30, 2015
D a t a S h e e t
10. Function
10.1 Outline of Operation
MB39C831 is the boost DC/DC converter which has the function controls for the synchronous rectification
operation of the integrated FET using the frequency set by the built-in oscillator. The converter operates in
PFM at light load currents.
This converter is equipped with a constant voltage mode (MPPT_ENA = L) and a charge mode (MPPT_ENA
= H).
Constant voltage mode: An output terminal VOUT outputs a constant voltage set by the S2, S1 and S0 pins.
Charge mode
: The input voltage (VIN) is adjusted by following the MPPT value set by the S2, S1
and S0 pins, and a Li-ion battery can be charged.
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10.2 Start-up/Shut-down Sequence
Constant Voltage Mode: MPPT_ENA = L, ENA = H
In order to operate the constant voltage mode, it supposes that to connect ceramic capacitor, electrolytic
capacitor, tantalum capacitor, electric double layered capacitor, and so on, to VCC pin. See Figure 11-1
circuit to use the constant voltage mode.
The constant voltage mode is necessary to set MPPT_ENA = L and ENA = H. MPPT_ENA pin is connected
to GND, and ENA pin is connected to VCC pin. See Figure 10-1 Start-up/shut-down sequences of constant
voltage mode.
Figure 10-1 Start-up/Shut-down Sequences of Constant Voltage Mode (MPPT_ENA=L, ENA=H)
VDD Voltage
VST
startup voltage
VCC Voltage
0.35V
0.2V
0V
0V
0V
2.9V
VCC=VOUT
2.6V
0V
2.6V
0V
2.9V
VOUT Voltage
Constant Voltage Operation
0V
2.6V
0V
LX
switching
VCC-VOUT
OFF
SW1
OFF
ON
Same as VCC Voltage
DET1
0V
0V
DET0
0V
0V
U
S
[1]
D
[2]
S
[3]
D
D
[4]
U
U
D
[5]
[6]
Mark
U
S
D
State
UVLO
Start-Up
Boost DC/DC
[1] When 0.35V (Minimum input voltage at start-up: VSTART) or higher voltage is applied to the VDD pin, the
start-up circuit activates charging the VCC capacitor C2 (see Figure 6-1).
[2] When the VCC reaches 2.9V (upper threshold of VCC detection voltage 1: VCCDETH1), the operation of
the start-up circuit stops, then the DC/DC converter activates charging the VOUT capacitor C3 (see Figure
6-1).
[3] When the VCC reaches less than 2.6V (lower threshold of VCC detection voltage 1: VCCDETL1) by the
internal consumption current, the start-up circuit operates again, and this sequence is repeated until the
VOUT becomes 2.9V (upper threshold of VOUT detection voltage 1: VOUTDETH1).
[4] When the VOUT reaches 2.9V (upper threshold of VOUT detection voltage 1: VOUTDETH1), the internal
switch SW1 (see Figure 6-1) between VCC and VOUT is turned on, and then the VCC and the VOUT are
connected internally. While the DC/DC converter is continuously operated, charging the VOUT capacitor C3
to the preset voltage setting by S2, S1, and S0 pins is performed.
[5] When the VDD falls and reaches 0.3V (VDD input voltage: VVDD) or less, the voltage of the VOUT and
VCC starts to decreases.
14
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MB39C831_DS405-00014-4v0-E, January 30, 2015
D a t a S h e e t
[6] After that the VOUT voltage reaches 2.6V (lower threshold of VOUT detection voltage 1: VOUTDETL1) or
the VCC voltage reaches 2.6V (lower threshold of VCC detection voltage 1: VCCDETL1), and then the
internal switch SW1 between VCC and VOUT is turned off, and the VCC and the VOUT are disconnected
internally.
Charge Mode: MPPT_ENA = H, ENA = H
In order to operate the charge mode, it supposes that to connect lithium ion secondary batteries, and so on,
to VCC pin. See Figure 11-2 circuit to use the charge mode.
The charge mode is necessary to set MPPT_ENA = H and ENA = H. Both MPPT_ENA and ENA are
connected to the VCC pin, and a Li-ion battery should be connected to the VOUT pin to make the VOUT ≥
2.6V (upper threshold of VOUT detection voltage 2: VOUTDETH2). See Figure 10-2 Start-up/shut-down
sequences of charge mode.
Figure 10-2 Start-up/Shut-down Sequences of Charge Mode (MPPT_ENA = H, ENA=H)
Release Voltage
0.35V
VDD Voltage
0V
VST
startup voltage
0V
0.2V
4V
VCC=VOUT
VCC Voltage
2.6V
VCC=VOUT
3.7V
2.55V
0V
4V
VOUT=Li-ion Voltage(>=2.6V)
VOUT Voltage
0V
VOUT=Li-ion Voltage(>=2.55V)
3.7V
2.55V
Battery Charging Operation
0V
0V
0V
LX
switching
VCC-VOUT
OFF
SW1
CSH1
0V
OFF
ON
VCC/2
0V
VCC/2
0V
CSH2
0V
DET1
0V
0V
DET0
0V
0V
Same as VCC Voltage
U
S
[1]
R
[2]
M
R
M
M
[3],[4]
R
M
U
[5]
U
[6]
Mark
U
S
R
M
State
UVLO
Start-Up
Release Voltage
MPPT Charge
[1] When 0.35V (Minimum input voltage at start-up: VSTART) or higher voltage is applied to the VDD pin, the
start-up circuit activates charging the VCC capacitor C2 (see Figure 6-1).
[2] When the VCC reaches 2.6V (upper threshold of VCC detection voltage 2: VCCDETH2) and the VOUT is
higher than 2.6V (upper threshold of VOUT detection voltage 2: VOUTDETH2), the operation of the start-up
circuit stops and the internal switch SW1 (see Figure 6-1) between VCC and VOUT is turned on. Then the
DC/DC converter activates charging the Li-ion battery (see Figure 6-1), and the MPPT control starts at the
same time.
[3] While the DC/DC converter is continuously operated, the voltage of VDD is controlled to the MPPT value
setting by S0, S1, and S2 pins. (For more detail, refer to Chapter 10.3).
[4] When the voltage of the Li-ion battery reaches 4V (upper threshold of VOUT detection voltage 3:
VOUTDETH3), the charging of the Li-ion battery stops. When the voltage of the Li-ion battery drops and
January 30, 2015, MB39C831_DS405-00014-4v0-E
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15
D a t a S h e e t
reaches 3.7V (lower threshold of VOUT detection voltage 3: VOUTDETL3), the charging of the Li-ion battery
starts again.
[5] When the VDD voltage drops and reaches 0.2V (lower threshold of UVLO detection voltage: VUVLOL),
the operation of the DC/DC converter stops, and then the voltage of the VOUT and VCC starts to decreases.
[6] The VOUT voltage reaches 2.55V (lower threshold of VOUT detection voltage 2: VOUTDETL2) or the
VCC voltage reaches 2.55V (lower threshold of VCC detection voltage 2: VCCDETL2, and then the internal
switch SW1 between VCC and VOUT is turned off, and the VCC and the VOUT are disconnected internally
to protect the Li-ion battery from an over-discharge.
10.3 MPPT Control
In general, the voltage of a solar cell varies depending on the load current. The operating point where the
power becomes the maximum is called the optimum operating point. The control which tracks the optimum
operating point is called the MPPT (Maximum Power Point Tracking) control.
MPPT Values Setting
The voltage where the power becomes the maximum is called the power maximum voltage, and the voltage
with no load is called the release voltage. The comparison between the power maximum voltage and the
release voltage is defined as the MPPT values.
In the charge mode, the input voltage (VDD) is adjusted and the DC/DC converter operates while tracking
the MPPT value setting by the S2, S1 and S0 pins.
When in use, set the MPPT value after confirming the voltage dependency of the solar cell power.
Figure 10-3 MPPT Control
Current(A)
Voltage depedence of Solar
cell_Current
Power
maximum
voltage
Release
voltage
Voltage(V)
Power(W)
Voltage depedence of Solar
cell_Power
Optimum
operating point
Voltage(V)
MPPT values[%] = Power maximum voltage/Open voltage×100
16
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D a t a S h e e t
MPPT Operation
When setting the charge mode, the internal pulse frequency is determined by the values of the capacitors
C5/C6 and C7/C8 (see Figure 6-1), which are connected to the CSH1 pin, and the CSH2 pin.
During the period of high level of the internal pulse setting by the capacitors C5/C6 connected to the CHS1
pin, the release voltage is measured. The capacitors C5/C6 latch the measured voltage level, the release
voltage.
During the period of low level of the internal pulse setting by the capacitors C7/C8 connected to the CSH2
pin, the charge current is determined in order to make the VDD pin's voltage equal to the MPPT setting
voltage, then the charging operation starts up. The MPPT setting voltage is calculated by the following
equation.
MPPT setting voltage = Release voltage × MPPT value (refer to Table 10-3 MPPT control)
When using the recommended pars, the frequency is set to 0.35Hz with 5% duty.
If not using the recommended parts, please be aware of the following points.
・In general, laminated capacitances have leak current. If the inside pulse cycle setting by the capacitors
C7/C8 were set too long, the voltage level of the capacitors C5/C6 would drop. There is a possibility that
the MPPT value cannot be set correctly.
・If the period of high level of inside pulse is set too short, setting by the capacitors C5/C6, the MPPT value
cannot be set correctly due to a lack of the measurement time of the release voltage.
Figure 10-4 MPPT Operation
Release voltage
VDD pin
voltage
MPPT setting voltage
Full charge detection
VOUT pin
voltage
Chareging resume
LX waveform
Measurement of release voltage
No DC/DC operation
Internal Pulse
Frequency 0.35Hz Duty 5%,
when using recommended parts
Charging Operation
time
The period of high level is set
by capacitors C5 and C6.
The period of high level is set
by capacitors C7 and C8.
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10.4 Function Description
Mode control
The mode is controlled by the MPPT_ENA pin. There are the charge mode and constant voltage mode,
which also determine the presence or absence of The MPPT, the UVLO, the VCC detecting, and the VOUT
detecting functions. Set the MPPT_ENA pin according to an application.
And also, the DC/DC converter is controlled by the ENA pin, transfer in operating state of Table10-1.
Table 10-1 Mode Control
Input
Charge
L
H
OFF
ON
OFF
OFF
OFF
ON
OFF
ON
OFF
OFF
OFF
L
Charge stop
ON
ON
OFF
ON
OFF
ON
ON
ON
H
Charge enabled
ON
ON
OFF
ON
OFF
ON
ON
ON
VOUT
ON
OFF
VOUT
OFF
OFF
VOUT
OFF
VOUT output enabled
VCC
VOUT output stop
VCC
L
H
detection
reverse
voltage
VOUT-VDD
detection 3
detection 2
detection 2
detection 1
ENA Pin
MPPT
voltage
Operating State
UVLO
Constant
pin
MPPT_ENA
Mode
detection 1
Function
Signal
Changing Setting Method of Preset Output Voltage & MPPT Setting
The state is controlled by the MPPT_ENA, the ENA, the S2, S1, and S0 pins.
The preset output voltage can be set in the constant voltage mode, set the MPPT_ENA = L and the ENA =H,
and then set it by the S2, S1, and S0 pins.
The MPPT value can be set in the charge mode, set the MPPT_ENA = H and the ENA =H, and then set it by
the S2, S1, and S0 pins.
Table 10-2 Changing Preset Output Voltage in Constant Voltage Mode (MPPT_ENA = L, ENA = H)
Input Signal
MPPT_ENA pin
L
ENA pin
H
Control
S2 pin
S1 pin
S0 pin
Preset Output Voltage (V)
L
L
L
L
3.0
L
H
3.3
L
L
H
L
3.6
H
H
4.1
H
H
L
L
4.5
L
H
5.0
H
H
H
L
Setting prohibited
H
H
Setting prohibited
Table 10-3 Changing MPPT Setting in Charge Mode (MPPT_ENA = H, ENA = H)
Input Signal
MPPT_ENA pin
H
18
CONFIDENTIAL
ENA pin
H
Control
S2 pin
S1 pin
S0 pin
MPPT Values
L
L
L
L
50%
L
H
55%
L
L
H
L
60%
H
H
65%
H
H
L
L
70%
L
H
75%
H
H
H
L
80%
H
H
85%
MB39C831_DS405-00014-4v0-E, January 30, 2015
D a t a S h e e t
VCC Detection1, 2 (VCC Detection Voltage1, 2): VCC Voltage Protection
This function works with both the constant voltage mode (MPPT_ENA =L) and the charge mode
(MPPT_ENA =H).
 Constant voltage mode (MPPT_ENA =L)
The detection that the VCC pin is equal to the threshold voltage (VCCDETH1 = 2.9V) or higher is the
source to start the DC/DC converter operation. It’s a factor to turn on the internal switch between
VCC and VOUT.
It has the hysteresis, and the detection that the VCC pin is equal to the threshold voltage
(VCCDETL1 = 2.6V) or lower is the source to stop the DC/DC converter operation. It’s a factor turn
off the internal switch between VCC and VOUT.
When the VCC pin becomes higher than the threshold voltage (VCCDETH1 = 2.9V) again, this
function is repeated.
 Charge mode (MPPT_ENA =H)
The detection that the VCC pin is equal to the threshold voltage (VCCDETH2 = 2.6V) or higher is the
source to start the DC/DC converter operation. It’s a factor turn on the internal switch between VCC
and VOUT.
It has the hysteresis, and the detection that the VCC pin is equal to the threshold voltage
(VCCDETL2 = 2.55V) or lower is the source to stop the DC/DC converter operation. It’s a factor turn
off the internal switch between VCC and VOUT.
When the VCC pin becomes higher than the threshold voltage (VCCDETH2 = 2.6V) again, this
function is repeated.
VOUT Detection1, 2 (VOUT Detection Voltage1, 2)
This function works with both the constant voltage mode (MPPT_ENA =L) and the charge mode
(MPPT_ENA =H).
 Constant voltage mode (MPPT_ENA =L)
The detection that the VOUT pin is equal to the threshold voltage (VOUTDETH1 = 2.9V), and it’s a
factor to turn on the internal switch between VCC and VOUT.
It has the hysteresis, and the detection that the VOUT pin is equal to the threshold voltage
(VOUTDETL1 = 2.6V), and it’s a factor to turn off the internal switch between VCC and VOUT.
When the VOUT pin becomes higher than the threshold voltage (VOUTDETH1 = 2.9V) again, this
function is repeated.
 Charge mode (MPPT_ENA =H)
The detection that the VOUT pin is equal to the threshold voltage (VOUTDETH2 = 2.6V) or higher is
the source to start the DC/DC converter operation. It’s a factor turn on the internal switch between
VCC and VOUT.
It has the hysteresis, and the detection that the VOUT pin is equal to the threshold voltage
(VOUTDETL2 = 2.55V) or lower is the source to stop the DC/DC converter operation. It’s a factor
turn off the internal switch between VCC and VOUT.
When the VOUT pin becomes higher than the threshold voltage (VOUTDETH2 = 2.6V) again, this
function is repeated.
VOUT Detection3 (VOUT Detection Voltage3)
This function works with the charge mode (MPPT_ENA =H).
When the VOUT pin becomes higher than the threshold voltage (VOUTDETH3 = 4V), the DC/DC converter
stops the operation.
It has the hysteresis, and when the VOUT pin becomes lower than the threshold voltage (VOUTDETL3
=3.7V), the DC/DC converter restarts the operation.
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D a t a S h e e t
UVLO
This function works with the charge mode (MPPT_ENA =H).
In the state the DC/DC converter starts and during the charge operation, when the VDD pin becomes lower
than the lower threshold voltage (VUVLOL = 0.2V), UVLO function works and the DC/DC converter stops the
operation.
Then when the VDD pin becomes higher than the upper threshold voltage (VUVLOH = 0.3V), the DC/DC
converter starts the operation again.
After that, this function is repeated.
VOUT-VDD Voltage Reverse Monitoring
This function works with the charge mode (MPPT_ENA =H).
The detection that the VDD pin is equal to the VOUT pin's voltage or higher is the source to stop the DC/DC
control part operation.
Output Current Protection
It has the current limitation function to protect the circuit during the over load current. When the input current
for the LX pin reaches LX peak current (ILIMIN_A), the output voltage drops in order to prevent the IC
destruction.
State Notification
This function is independent of the MPPT_ENA setting.
The VCC voltage stage, the VOUT voltage state, and the VOUT-VDD voltage reverse state are notified by
the DET[1:0] signals.
The state notification is not a power good function.
Table 10-4 Stage Notification of Constant Voltage Mode (MPPT_ENA = L, ENA = H)
Output Signal
State
DET1 Pin
DET0 Pin
Constant Voltage Mode (MPPT_ENA = L, ENA = H)
L
L
VCC terminal ≤ VCC detection voltage 1 and VOUT terminal ≤ VOUT detection voltage 1
L
H
VCC terminal ≥ VCC detection voltage 1 and VOUT terminal ≤ VOUT detection voltage 1
H
L
H
H
Constant voltage operation:
VCC terminal ≥ VCC detection voltage 1 and VOUT terminal ≥ VOUT detection voltage 1
VCC terminal ≤ VCC detection voltage 1 and VOUT terminal ≥ VOUT detection voltage 1
Table 10-5 Stage Notification of Charge Node (MPPT_ENA = H, ENA = H)
Output Signal
State
DET1 Pin
DET0 Pin
Charge Mode (MPPT_ENA = H, ENA = H)
L
L
VCC terminal ≤ VCC detection voltage 2 and VOUT terminal ≤ VOUT detection voltage 2
L
H
H
L
Abnormal stage:
Stage that VDD voltage is higher than VOUT voltage (VOUT < VDD) (*1)
Protection stop stage:
During the period VOUT drop from 4V to 3.7V, after VOUT reaches VOUT detection
voltage 3 (VOUTDETH3 = 4V) (*2)
H
H
MPPT operation:
VCC terminal ≥ VCC detection voltage 2 and VOUT terminal ≥ VOUT detection voltage 2
*1: DET[1:0]=[L:L] has the highest priority.
*2: DET[1:0]=[L:H] has the highest priority.
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D a t a S h e e t
11. Typical Applications Circuit
Constant Voltage Mode
Figure 11-1 Application Circuit of Constant Voltage Mode (MPPT_ENA = L, ENA = H)
L1 4.7µF
C1
Solar
Cell
10µF
LX
VST
VDD
D1
C11
D2
C2
VZ = 6.2V
(IZ = 250µA)
VCC
VZ = 6.2V
(IZ = 250µA)
VOUT
VOUT_S
GND
MPPT_ENA
VCC
ENA
S0
DET0
VCC or GND
S1
DET1
VCC or GND
S2
MPPT_OUT
January 30, 2015, MB39C831_DS405-00014-4v0-E
CONFIDENTIAL
1µF
C3
10µF
Super
Cap
FB
VCC or GND
CSH2
47nF
CSH1
CSH0
MPPT_IN
21
D a t a S h e e t
Charge Mode
Figure 11-2 Application Circuit of Charge Mode (MPPT_ENA = H, ENA = H)
L1 4.7µF
C1
10µF
Solar
Cell
LX
VST
D1
VDD
C11
VZ = 6.2V
(IZ = 250µA)
VCC
D2
C2
VZ = 6.2V
(IZ = 250µA)
VOUT
10µF
C9
MPPT_ENA
VCC
ENA
CONFIDENTIAL
33pF
Li-ion
Battery
FB
VCC or GND
S0
DET0
VCC or GND
S1
DET1
VCC or GND
S2
MPPT_OUT
CSH2
22
1µF
C3
VOUT_S
VCC
47nF
CSH1
CSH0
C8
C7
C6
C5
C4
47nF
100nF
4.7nF
3.3nF
470nF
MPPT_IN
R1
R2
100kΩ
100kΩ
R3
200kΩ
C10
10nF
MB39C831_DS405-00014-4v0-E, January 30, 2015
D a t a S h e e t
Parts List
Table 11-1 Parts List
Part number
Value
Description
C1
10 μF
Capacitor
C2
1 μF
Capacitor
C3
10 μF
Capacitor
C4
470 nF
Capacitor
C5
3.3 nF
Capacitor
C6
4.7 nF
Capacitor
C7
100 nF
Capacitor
C8
47 nF
Capacitor
C9
33 pF
Capacitor
C10
10 nF
Capacitor
C11
47 nF
Capacitor
R1
100 kΩ
Resistor
R2
100 kΩ
Resistor
R3
200 kΩ
Resistor
L1
4.7 μH
Inductor
D1
VZ=6.2V (LZ=250 µA)
Zener diode
D2
VZ=6.2V (LZ=250 µA)
Zener diode
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23
D a t a S h e e t
12. Application Notes
Inductor
The MB39C831 is optimized to work with an inductor in the range of 4.7 µH. Select a value of 4.7 µH. Also,
select an inductor with a DC current rating which can permit the peak current for the inductor.
The peak current for the inductor in steady state operation (ILMAX) can be calculated by the following
equation according to the maximum current of harvesters (IINMAX).
VVDD × (VVOUT − VVDD )
2 × VVOUT × FOSC × L
= 1MHz (Typ)
ILMAX = IINMAX +
FOSC
Harvester (Photovoltaic Power Generator)
In case of photovoltaic (or solar) energy harvesting, use a solar cell with an open-circuit voltage less than
4.75V and the preset output voltage. Electric power obtained from a solar or light is increased in proportion
to the ambient illuminance. Silicone-based solar cells are single crystal silicon solar cell, polycrystalline
silicon solar cell, and amorphous silicon solar cell. Organic-based solar cells are dye-sensitized solar cell
(DSC), and organic thin film solar cell. Crystal silicon and polycrystalline silicon solar cells have high energy
conversion efficiency. Amorphous silicon solar cells are lightweight, flexible, and produced at low cost.
Dye-sensitized solar cells are composed by sensitizing dye and electrolytes, and are low-cost solar cell.
Organic thin film solar cells are lightweight, flexible, and easily manufactured.
Harvester (Temperature Difference Power Generator)
Temperature difference power generators produce electric power keeping temperature difference between
the high temperature side and the low temperature side. The temperature difference power generators
include the peltier elements utilizing the Seebeck effect and thermopiles that made of thermocouples in
series or in parallel.
Sizing of Input and Output Capacitors
Common capacitors are layered ceramic capacitor, electrolytic capacitor, electric double layered capacitor
(EDLC), and so on. Electrostatic capacitance of layered ceramic capacitors is relatively small. However,
layered ceramic capacitors are small and have high voltage resistance characteristic. Electrolytic capacitors
have high electrostatic capacitance from µF order to mF order. The size of capacitor becomes large in
proportion to the size of capacitance. Electric double layered capacitors have high electrostatic capacitance
around 0.5F to 1F, but have low voltage resistance characteristics around 3V to 5V. Be very careful with a
voltage resistance characteristic. Also, leak current, equivalent series resistance (ESR), and temperature
characteristic are criteria for selecting,
Table 12-1 Manufactures of Capacitors
Part Number/Series Name
Type, Capacitance
EDLC351420-501-2F-50
EDLC, 500 mF
EDLC082520-500-1F-81
EDLC, 50 mF
EDLC041720-050-2F-52
EDLC, 5 mF
Gold capacitor
EDLC
Manufacture
TDK Corporation
Panasonic Corporation
Energy from harvester should be stored on the Cin and Cout to operate the application block. If the size of
these capacitors were too big, it would take too much time to charge energy into these capacitors, and the
system cannot be operated frequently. On the other hand, if these capacitors were too small, enough energy
cannot be stored on these capacitors for the application block. The sizing of the Cin and Cout is important.
24
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MB39C831_DS405-00014-4v0-E, January 30, 2015
D a t a S h e e t
First of all, apply the following equation and calculate energy consumption for an application from voltage,
current, and time during an operation.
1
2
EAppli. [J] = VAppli. × IAppli. × t Appli.
The energy stored on a capacitor is calculated by the following equation.
Ec [J] =
1 2
CV
2
Since the energy in a capacitor is proportional to the square of the voltage, it is energetically advantageous
for the boost DC/DC converter, the input voltage, is less than the output voltage, to make the Cout larger.
The Cin and the Cout are sized so as to satisfy the following equation (refer to Figure 12-1). The η, the
efficiency of the MB39C831, is determined from the graph of the efficiency shown in Figure 13-1
EAppli. ≤ dECin × η + dECout
1
2
dECin and dECout are the available energies for the application.
1
dECin [J] = Cin(VDD2 − 0.32 )
2
1
dECout [J] = Cout(VOUT 2 − VOMIN2 )
2
Figure 12-1 Example of Energy Harvesting System
VDD
Cin
Harvester
VDD
0.3V
0V
Available Energy
VDD
0.3V
VOUT
MB39C831
Efficiency(η)
+
: VDD input voltage
: Min VDD input voltage
VOUT
VOMIN
Cout
Appli.
0V
Total Energy
VOUT
VOMIN
: Preset output voltage
: Min. operating voltage of an application
Before calculating the initial charging time (TInitial), calculate the total energy (ECin and ECout) stored on both
Cin and Cout.
1
ECin [J] = Cin × VDD2
2
1
ECout [J] = Cout × VOUT 2
2
PHarvester is a power generation capability of a harvester. An initial charging time (T Initial) is calculated by the
following equation.
TInitial =
ECin
ECout
+
PHarvester PHarvester × η
Repeat charging time (TRepeat) is calculated by the following equation. The TRepeat become shorter than TInitial.
TRepeat =
dECin
dECout
+
PHarvester PHarvester × η
January 30, 2015, MB39C831_DS405-00014-4v0-E
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25
D a t a S h e e t
13. Typical Characteristics
Figure 13-1 Typical Characteristics of Constant Voltage Mode (MPPT_ENA = L, ENA = H)
Line Regulation: VOUT vs
VDD
o
VDD = 0.6V, IOUT = 0A, Ta = 25 C
3.35
Preset output voltage = 3.0V
VDD = 0.6V, IOUT = 0A, Ta = 25 C
Preset output voltage = 3.3V
3.03
3.33
5.07
3.32
3.31
3.00
0.0
0.5
1.0
1.5
VDD [V]
2.0
2.5
3.30
0.0
3.0
0.5
1.0
Data831001
Load Regulation:
VOUT vs IOUT
o
Ta = 25 C
3.33
Preset output voltage = 3.0V
3.0
VOUT [V]
VDD = 2.8V
3.00
5.04
0
3.5
Ta = 25 C
5.06
Preset output voltage = 3.3V
0.1m
1m
0.01
IOUT [A]
0.1
3.31
VDD = 3.1V
3.30
0.01m
0.1m
Data831004
Ta = 25 C
100
Preset output
voltage = 3.0V
VDD = 2.8V
Efficiency [%]
VDD = 0.6V
40
1m
0.01
IOUT [A]
0.1
0.01m
26
CONFIDENTIAL
0.1m
1m
0.01
Inductor current [A]
0.1
1
Data831007
5
4
Data831003
Load Regulation:
VOUT vs IOUT
o
Ta = 25 C
Preset output voltage = 5.0V
5.04
VDD = 4.8V
5.03
5.01
1µ
1
Ta = 25 C
100
Preset output
voltage = 3.3V
VDD = 3.1V
0.1m
VDD = 0.6V
40
1m
0.01
IOUT [A]
0.1
1
Data831006
Efficiency
vs Inductor current
o
Ta = 25 C
Preset output
voltage = 5.0V
VDD = 4.8V
80
60
1µ
0.01m
Data831005
20
20
3
VDD [V]
VDD = 0.6V
Efficiency
vs Inductor current
o
80
60
0
1µ
2
5.02
3.28
1µ
1
Efficiency
vs Inductor current
o
80
1
5.05
3.29
0.01m
5.06
VDD = 0.6V
2.99
2.98
1µ
Preset output voltage = 5.0V
Data831002
Load Regulation:
VOUT vs IOUT
o
VDD = 0.6V
Efficiency [%]
2.5
3.32
3.01
100
1.5
2.0
VDD [V]
VOUT [V]
3.02
VDD = 0.6V, IOUT = 0A, Ta = 25 C
5.05
Efficiency [%]
3.03
VOUT [V]
5.08
3.02
Line Regulation: VOUT vs
VDD
o
5.09
3.34
3.01
VOUT [V]
Line Regulation: VOUT vs
VDD
o
3.04
VOUT [V]
VOUT [V]
3.05
60
VDD = 0.6V
40
20
0.01m
0.1m
1m
0.01
Inductor current [A]
0.1
1
Data831008
0
1µ
0.01m
0.1m
1m
0.01
Inductor current [A]
0.1
1
Data831009
MB39C831_DS405-00014-4v0-E, January 30, 2015
D a t a S h e e t
Min. VDD input voltage in start-up
vs Temp.
400
VDD = 0V
3.5
Preset output voltage = 3.0V
Preset output voltage = 3.6V
Preset output voltage = 5.0V
IOUT = 10mA, Ta = 25 C
100
in applying 5.0V to VOUT
Preset output voltage = 3.0V
90
3.0
IQOUT [µA]
380
VDD [mV]
Efficiency vs VDDo
IQOUT vs Temp.
4.0
360
340
2.5 in applying 3.6V to VOUT
Efficiency [%]
420
2.0
1.5 in applying 3.0V to VOUT
80
70
60
1.0
320
0
20
40
Temp. [oC]
60
0.0
-40
80 85
Data831010
Inductor current in start-up
vs VDD
100
Preset output voltage = 3.0V
90
Inductor current in start-up [mA]
Inductor current in start-up [mA]
90
-20
80
70
60
50
40
30
20
10
25oC
o
－40 C
85oC
0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
VDD [V]
Data831013
January 30, 2015, MB39C831_DS405-00014-4v0-E
CONFIDENTIAL
-20
0
20
40
Temp. [oC]
60
Inductor current in start-up
vs VDD
100
Preset output voltage = 3.6V
90
80
70
60
50
40
30
20
40
0.0
80 85
0.5
1.0
Data831011
25oC
－40oC
85oC
10
0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
VDD [V]
Data831014
Inductor current in start-up [mA]
300
-40
100
50
0.5
80
1.5
2.0
VDD [V]
2.5
3.0
3.5
Data831012
Inductor current in start-up
vs VDD
Preset output voltage = 5.0V
－40oC
25oC
70
60
85oC
50
40
30
20
10
0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
VDD [V]
Data831015
27
D a t a S h e e t
60
50
40
30
20
90
VDD = 0.6V
80
70
60
50
40
30
20
10
10
0
3.0V
0
3.0V
3.3V
3.6V
4.1V
4.5V
Preset output voltages
5.0V
VDD = 2.0V
250
－40 C
25oC
85oC
200
150
100
50
60
50
3.3V
3.6V
4.1V
4.5V
Preset output voltages
300
o
5.0V
Data831019
90
Maximum output current
vs Preset output voltages
－40oC
25oC
85oC
VDD = 1.0V
80
70
60
50
40
30
20
10
Data831016
Maximum output current
vs Preset output voltages
－40oC
25oC
85oC
100
Maximum output current [mA]
70
0
3.0V
VOUT pin current [µA]
－40oC
25oC
85oC
Maximum output current
vs Preset output voltages
3.3V
3.6V
4.1V
4.5V
Preset output voltages
0
3.0V
5.0V
Maximum output current
vs Preset output voltages
VDD = 3.0V
250
－40 C
25oC
85oC
150
100
50
3.6V
4.1V
4.5V
Preset output voltages
300
o
200
0
3.3V
3.3V
Data831017
5.0V
Data831020
Maximum output current : IOUT [mA]
80
300
Maximum output current [mA]
VDD = 0.3V
100
Maximum output current [mA]
Maximum output current [mA]
90
Maximum output current
vs Preset output voltages
Maximum output current [mA]
100
3.6V
4.1V
4.5V
Preset output voltages
5.0V
Data831018
Maximum
output current vs VDD
o
Ta = 25 C
Preset output voltage =
3.0V
3.3V
3.6V
200
250
150
100
4.1V
4.5V
5.0V
50
0
0
1
2
3
VDD [V]
4
5
Data831021
VOUT pin current
vs Preset output voltages
VDD = 0.6V, Ta = 25 oC
MPPT_ENA = L, ENA = H
40
30
20
10
0
3.3V
28
CONFIDENTIAL
3.6V
4.1V
4.5V
Preset output voltages
5.0V
Data831022
MB39C831_DS405-00014-4v0-E, January 30, 2015
D a t a S h e e t
Figure 13-2 Switching Waveforms of Constant Voltage Mode (MPPT_ENA = L, ENA = H)
Waveforms : PWM mode
Waveforms : PWM mode
VDD = 0.6V, L = 4.7µH, IOUT = 10mA
VDD = 0.6V, L = 4.7µH, IOUT = 10mA
Preset output voltage = 3.3V
Preset output voltage = 3.3V
VOUT
5mV/DIV
AC-COUPLED
VOUT
5mV/DIV
AC-COUPLED
ILX
100mA/DIV
ILX
100mA/DIV
1µs/DIV
400ns/DIV
Wave831001
Wave831002
Waveforms : PFM mode
Waveforms : PFM mode
VDD = 0.6V, L = 4.7µH, IOUT = 1mA
VDD = 0.6V, L = 4.7µH, IOUT = 1mA
Preset output voltage = 3.3V
Preset output voltage = 3.3V
VOUT
5mV/DIV
AC-COUPLED
VOUT
5mV/DIV
AC-COUPLED
ILX
100mA/DIV
ILX
100mA/DIV
10µs/DIV
4µs/DIV
Wave831003
January 30, 2015, MB39C831_DS405-00014-4v0-E
CONFIDENTIAL
Wave831004
29
D a t a S h e e t
Figure 13-3 Typical Characteristics of Charge Mode (MPPT_ENA = H, ENA = H)
VOUT pin current [µA]
50
VOUT pin current
vs Preset output voltages
6.0
VDD = 0.6V, Ta = 25 oC
MPPT_ENA = H, ENA = H
40
30
20
10
0
3.0V
VOUT pin current
vs VOUT
5.0
VOUT pin current [µA]
60
VDD = 0V, Ta = 25 oC
MPPT_ENA = H, ENA = H
4.0
3.0
2.0
1.0
3.3V
3.6V
4.1V
4.5V
Preset output voltages
5.0V
0
3.0
3.5
Data831024
4.0
4.5
VOUT [V]
5.0
5.5
Data831025
Figure 13-4 Waveforms of VDD Pin Voltage in Charge Mode (MPPT_ENA = H, ENA = H)
Waveforms : Charge mode (MPPT mode)
Waveforms : Charge mode (MPPT mode)
VDD = 0.6V, C5/C6 = 3.3nF/4.7nF, C7/C8 = 100nF/47nF
VDD = 0.6V, C5/C6 = 10nF/4.7nF, C7/C8 = 100nF/220nF
MPPT setting = 50%, MPPT setting voltage = 0.6V × 50%
in applying 3.3V to VOUT
VDD
200mV/DIV
MPPT setting = 50%, MPPT setting voltage = 0.6V × 50%
in applying 3.3V to VOUT
VDD
200mV/DIV
Measurement of release voltage
600
600
300
300
0
0
Period of 1 cycle
1s/DIV
CONFIDENTIAL
Period of 1 cycle
1s/DIV
Wave831005
30
Measurement of release voltage
Wave831006
MB39C831_DS405-00014-4v0-E, January 30, 2015
D a t a S h e e t
14. Layout for Printed Circuit Board
Note the Points Listed Below in Layout Design
− Place the switching parts (*1) on top layer, and avoid connecting each other through through-holes.
− Make the through-holes connecting the ground plane close to the GND pins of the switching parts(*1).
− Be very careful about the current loop consisting of the output capacitor C3, the VOUT pin of IC, and
the PGND2 pin. Place and connect these parts as close as possible to make the current loop small.
− The input capacitor C1 and the inductor L1 are placed adjacent to each other.
− Place the bypass capacitor C11 close to VST pin, and make the through-holes connecting the ground
plane close to the GND pin of the bypass capacitor C11.
− Place the bypass capacitor C2 close to VCC pin, and make the through-holes connecting the ground
plane close to the GND pin of the bypass capacitor C2.
− Draw the feedback wiring pattern from the VOUT_S pin to the output capacitor C3 pin. The wiring
connected to the VOUT_S pin is very sensitive to noise so that the wiring should keep away from the
switching parts(*1). Especially, be very careful about the leaked magnetic flux from the inductor L1,
even the back side of the inductor L1.
*1: Switching parts: IC (MB39C831), Input capacitor (C1), Inductor (L1), Output capacitor (C3).
Refer to Figure 6-1.
VCC
C2
VOUT
LX
PGND2
VOUT_S
VST
PGND1
VDD
D1
C11
Figure 14-1 Example of a Layout Design
C9
C3
C4-C8
Top Layer
R3,R2
R1,C10
Back Layer
January 30, 2015, MB39C831_DS405-00014-4v0-E
CONFIDENTIAL
C1
through-holes
L1
feedback wiring pattern
31
D a t a S h e e t
15. Usage Precaution
Do Not Configure the IC Over the Maximum Ratings
If the IC is used over the maximum ratings, the LSI may be permanently damaged.
It is preferable for the device to be normally operated within the recommended usage conditions. Usage
outside of these conditions can have a bad effect on the reliability of the LSI.
Use the Devices within Recommended Operating Conditions
The recommended operating conditions are the recommended values that guarantee the normal operations
of LSI.
The electrical ratings are guaranteed when the device is used within the recommended operating conditions
and under the conditions stated for each item.
Printed Circuit Board Ground Lines should be Set up with Consideration for Common
Impedance
Take Appropriate Measures Against Static Electricity
− Containers for semiconductor materials should have anti-static protection or be made of conductive
material.
− After mounting, printed circuit boards should be stored and shipped in conductive bags or containers.
− Work platforms, tools, and instruments should be properly grounded.
− Working personnel should be grounded with resistance of 250 kΩ to 1 MΩ in series between body and
ground.
Do Not Apply Negative Voltages
The use of negative voltages below -0.3V may cause the parasitic transistor to be activated on LSI lines,
which can cause malfunctions.
16. Ordering Information
Table 16-1 Ordering Information
Part Number
Package
40-pin plastic QFN
MB39C831QN
(LCC-40P-M63)
17. Marking
Figure 17-1 Marking
MB 3 9 C 8 3 1
E2
INDEX
32
CONFIDENTIAL
Lead free mark
MB39C831_DS405-00014-4v0-E, January 30, 2015
D a t a S h e e t
18. Product Labels
Figure 18-1 Inner Box Label [Q-Pack Label (4 × 8.5inch)]
Ordering Part Number
(P)+Part No.
Quantity
Mark lot information
Label spec
: Conformable JEDEC
Barcode form : Code 39
January 30, 2015, MB39C831_DS405-00014-4v0-E
CONFIDENTIAL
33
D a t a S h e e t
Figure 18-2 Al(Aluminum) Bag Label [2-in-1 Label (4 × 8.5inch)]
Ordering Part Number
(P)+Part No.
Mark lot information
Quantity
Caution
JEDEC MSL, if available.
34
CONFIDENTIAL
MB39C831_DS405-00014-4v0-E, January 30, 2015
D a t a S h e e t
Figure 18-3 Reel Label [Reel Label (4 × 2.5inch)]
Ordering Part Number
(P)+Part No.
Mark lot information
Quantity
Figure 18-4 Reel Label [Dry Pack & Reel Label (4 × 2.5inch)]
Figure 18-5 Outer Box Label [Shopping Label (4 × 8.5inch)]
Quantity
Ordering Part Number : (1P)+Part No.
January 30, 2015, MB39C831_DS405-00014-4v0-E
CONFIDENTIAL
35
D a t a S h e e t
19. Recommended Mounting Conditions
Table 19-1 Recommended Mounting Conditions
Items
Contents
Method
IR(Infrared Reflow) / Convection
Times
3 times in succession
Floor life
Before unpacking
Please use within 2 years after production.
From unpacking to reflow
Within 7 days
In case over period
Baking with 125°C+/-3°C for 24hrs+2hrs/-0hrs is required. Then please
of floor life(*1)
use within 7 days (Please remember baking is up to 2 times).
Floor life
Between 5°C and 30°C and also below 60%RH required.
condition
(It is preferred lower humidity in the required temp range.)
*1: Concerning the Tape & Reel product, please transfer product to heatproof tray and so on when you
perform baking. Also please prevent lead deforming and ESD damage during baking process.
Figure 19-1 Recommended Mounting Conditions
Supplier Tp ≥ Tc
User Tp ≤ Tc
Tc
Tc -5°C
Supplier tp
User tp
Te m p e r a t u r e
Tp
Max. Ramp Up Rate = 3°C/s
Max. Ramp Down Rate = 6°C/s
TL
Tsmax
tp
Tc -5°C
tL
Preheat Area
Tsmin
ts
25
Time 25°C to Peak
Time
Table 19-2 Recommended Mounting Conditions (J-STD-020D)
(Temperature on the top of the package body is measured.)
260°C Max.
36
CONFIDENTIAL
TL to TP: Ramp Up Rate
3°C/s Max.
TS: Preheat & Soak
150°C to 200°C, 60s to 120s
TP - tP: Peak Temperature
260°C Down, within 30s
TL – tL: Liquidous Temperature
217°C, 60s to 150s
TP to TL: Ramp Down Rate
6°C /s Max.
Time 25°C to Peak
8min Max.
MB39C831_DS405-00014-4v0-E, January 30, 2015
D a t a S h e e t
20. Package Dimensions
40-pin plastic QFN
Lead pitch
0.50 mm
Package width ×
package length
6.00 mm × 6.00 mm
Sealing method
Plastic mold
Mounting height
0.90 mm MAX
Weight
0.10 g
(LCC-40P-M63)
40-pin plastic QFN
(LCC-40P-M63)
4.50±0.10
(.177±.004)
6.00±0.10
(.236±.004)
INDEX AREA
6.00±0.10
(.236±.004)
0.25±0.05
(.010±.002)
4.50±0.10
(.177±.004)
0.45
(.017)
1PIN INDEX
R0.20(R.008)
0.50(.020)
(TYP)
0.40±0.05
(.016±.002)
+.0006
0.035 +0.015
-0.035 (.0014 -.0014 )
(0.20(.008))
0.85±0.05
(.033±.002)
C
2013 FUJITSU SEMICONDUCTOR LIMITED HMbC40-63Sc-1-1
Dimensions in mm (inches).
Note: The values in parentheses are reference values.
January 30, 2015, MB39C831_DS405-00014-4v0-E
CONFIDENTIAL
37
D a t a S h e e t
21. Major Changes
Page
Section
Change Results
Preliminary 0.1 [June 14, 2013]
-
-
Initial release
Revision 1.0 [November 18, 2013]
8
6.Block Diagram
Added capacitor
9
7.Absolute Maximum Ratings
Added the Rating and of Power dissipation and Figure 7-1
Divided old table into system in general table and Boost DC/DC converter
11, 12
9.Electrical Characteristics
table.
Added ENA=H into the condition on the table.
Changed the Input power supply current condition
14
16
18
19, 20
10.Function
Added more description
10.3 MPPT control
10.4 Function
Changed the sentence "This function is independent of MPPT_ENA." to"
UVLO
This function operates in the charge mode."
11.Example
Added standard example
12.Typical Applications Circuit
Circuit
Added D2 and C11
21
Parts list
Added D2 and C11
23
14.Ordering Information
Added "Figures 14-2 EVB ORDERING INFORMATION"
24
15.Marking
Added new
25
16.Product Label
Added new
26
17.Recommended Mounting Conditions
-
-
Added new
Company name and layout design change
Revision 2.0 [August 29, 2014]
11, 12
15
17
19
9. Electrical Characteristics
The table of the electrical characteristics was divided into that of the
Table 9-1, Table 9-2
constant voltage mode and that of charge mode
10.2 Start-up/Shut-down sequence
Figure 10-1
10.2 Start-up/Shut-down sequence
Figure 10-2
The table of the preset output voltage and the MPPT setting was divided
Table 10-2, Table 10-3
into that of the preset output voltage and that of the MPPT setting.
State notification
Table 10-4, Table 10-5
25, 26
27 to 31
32
36 to 39
Added the sequences of MPPT_ENA, ENA, DET1, and DET0 pins.
10.4 Function description
10.4 Function description
21
Added the sequences of MPPT_ENA, ENA, DET1, and DET0 pins.
The table of the state notification was divided into that of the constant
voltage mode and that of charge mode
12. Application Notes
Added the 12. Application Notes
13. Typical Characteristics
Added the 13. Typical Characteristics
14. Layout for Printed Circuit Board
Added the 14. Layout for Printed Circuit Board
18. Product Labels
Changed the 18. Product Labels
Revision 3.0 [October 10, 2014]
3
21
24
26
1. Description
10.4 Function description
State notification
11. Typical Applications Circuit
Table 11-1 Parts list
Made a change in the sentence.
(MPPT) → (MPPT: Maximum Power Point Tracking)
Added a following sentence.
“The state notification is not a power good function”
Made a correction in the part number C6.
4.7 pF → 4.7 nF
12. Application Notes
Added a note in the “Figure 12-1 Application example using the power
Figure 12-1
gating”
38
CONFIDENTIAL
MB39C831_DS405-00014-4v0-E, January 30, 2015
D a t a S h e e t
Page
37
Section
19. Recommended Mounting Conditions
Table 19-1
Change results
Made a correction in the floor life condition.
70%RH → 60%RH
Revision 4.0
7
5. Pin Descriptions
9. Electrical Characteristics
11
9.1 Electrical Characteristics of Constant
Voltage Mode
12
9. Electrical Characteristics
9.2 Electrical Characteristics of Charge Mode
Added descriptions for all N.C. pins in “Table 5-1 Pin descriptions”
“Non connection pin” → “Non connection pin (Leave this pin open)”
Changed the parameter names in “Table 9-1”
“Input power supply current” → “Current dissipation 1 “
“Current dissipation” → “Current dissipation 2 “
Changed the parameter names in “Table 9-2”
“Current dissipation” → “Current dissipation 2 “
Deleted the rows of the “Input power supply current” from “Table 9-2”
9. Electrical Characteristics
12
9.3 Electrical Characteristics of Boost DC/DC
Deleted the “*2” annotation
Converter
13
14, 15
16, 17
18 to 20
10. Function
10.1 Outline of Operation
10. Function
10.2 Start-up/Shut-down Sequence
10. Function
10.3 MPPT Control
10. Function
10.4 Function Description
Updated the “10.1 Outline of Operation”
Updated the “10.2 Start-up/Shut-down Sequence”
Updated the “10.3 MPPT Control”
Updated the “10.4 Function Description”
Added the equation according to the maximum current in the “Inductor” part.
24, 25
12.Application Notes
Added the “Table 12-1 Manufactures of Capacitors”
Deleted the description of the power gating from “Figure 12-1”
Updated the “13. Typical Characteristics”
26 to 30
13. Typical Characteristics
Replaced the efficiency data in “Figure 13-1”
16. Ordering Information
Deleted the “Table 16-2 EVB Ordering information”
“Efficiency vs IOUT” → “Efficiency vs Inductor current”
32
January 30, 2015, MB39C831_DS405-00014-4v0-E
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39
D a t a S h e e t
Colophon
The products described in this document are designed, developed and manufactured as contemplated for general use,
including without limitation, ordinary industrial use, general office use, personal use, and household use, but are not
designed, developed and manufactured as contemplated (1) for any use that includes fatal risks or dangers that, unless
extremely high safety is secured, could have a serious effect to the public, and could lead directly to death, personal injury,
severe physical damage or other loss (i.e., nuclear reaction control in nuclear facility, aircraft flight control, air traffic control,
mass transport control, medical life support system, missile launch control in weapon system), or (2) for any use where
chance of failure is intolerable (i.e., submersible repeater and artificial satellite). Please note that Spansion will not be liable
to you and/or any third party for any claims or damages arising in connection with above-mentioned uses of the products.
Any semiconductor devices have an inherent chance of failure. You must protect against injury, damage or loss from such
failures by incorporating safety design measures into your facility and equipment such as redundancy, fire protection, and
prevention of over-current levels and other abnormal operating conditions. If any products described in this document
represent goods or technologies subject to certain restrictions on export under the Foreign Exchange and Foreign Trade Law
of Japan, the US Export Administration Regulations or the applicable laws of any other country, the prior authorization by the
respective government entity will be required for export of those products.
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The contents of this document are subject to change without notice. This document may contain information on a Spansion
product under development by Spansion. Spansion reserves the right to change or discontinue work on any product without
notice. The information in this document is provided as is without warranty or guarantee of any kind as to its accuracy,
completeness, operability, fitness for particular purpose, merchantability, non-infringement of third-party rights, or any other
warranty, express, implied, or statutory. Spansion assumes no liability for any damages of any kind arising out of the use of
the information in this document.
®
®
®
TM
Copyright © 2013 - 2015 Spansion All rights reserved. Spansion , the Spansion logo, MirrorBit , MirrorBit Eclipse ,
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TM
ORNAND , Easy DesignSim , Traveo and combinations thereof, are trademarks and registered trademarks of Spansion
LLC in the United States and other countries. Other names used are for informational purposes only and may be trademarks
of their respective owners.
40
CONFIDENTIAL
MB39C831_DS405-00014-4v0-E, January 30, 2015