MB39C831

MB39C831
Ultra Low Voltage Boost Power Management IC
for Solar/Thermal Energy Harvesting Datasheet
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 0.35 V using the low-voltage process and adapts the applications which the single cell solar cell is
treated as the input.
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
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
Note: This product supports the web-based design simulation tool, Easy DesignSim.
It can easily select external components and can display useful information.
Please access from http://cypress.transim.com/login.aspx
Cypress Semiconductor Corporation
Document Number: 002-08404 Rev *A
•
198 Champion Court
•
San Jose, CA 95134-1709
•
408-943-2600
Revised February 4, 2016
MB39C831
Contents
1.
Pin Assignments .................................................................................................................................... 3
2.
Pin Descriptions ..................................................................................................................................... 4
3.
Block Diagram ........................................................................................................................................ 5
4.
Absolute Maximum Ratings .................................................................................................................. 6
5.
Recommended Operating Conditions .................................................................................................. 7
6.
Electrical Characteristics....................................................................................................................... 7
6.1
6.2
6.3
7.
Electrical Characteristics of Constant Voltage Mode ......................................................................7
Electrical Characteristics of Charge Mode ...................................................................................8
Electrical Characteristics of Boost DC/DC Converter .....................................................................8
Function .................................................................................................................................................. 9
7.1
7.2
7.3
7.4
8.
Outline of Operation .................................................................................................................9
Start-up/Shut-down Sequence ...................................................................................................9
MPPT Control .......................................................................................................................12
Function Description ..............................................................................................................14
Typical Applications Circuit................................................................................................................. 18
9.
Application Notes ................................................................................................................................. 21
10. Typical Characteristics ........................................................................................................................ 23
11. Layout for Printed Circuit Board ......................................................................................................... 28
12. Usage Precaution ................................................................................................................................. 29
13. Ordering Information............................................................................................................................ 29
14. Marking.................................................................................................................................................. 29
15. Product Labels ..................................................................................................................................... 30
16. Recommended Mounting Conditions ................................................................................................. 34
17. Package Dimensions............................................................................................................................ 36
Major Changes ............................................................................................................................................. 37
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MB39C831
1. Pin Assignments
Figure 1-1 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
MPPT_OUT
S1
CSH2
N.C.
CSH1
30
N.C.
１
CSH0
S2
(QFN_40PIN)
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MB39C831
2. Pin Descriptions
Table 2-1 Pin Descriptions
Pin No.
Pin Name
I/O
Description
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
30, 31, 32, 33, 34, 35,
36, 37, 38, 39, 40
N.C.
-
Non connection pins (Leave these pins open.)
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MB39C831
3. Block Diagram
Figure 3-1 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
PFM/PWM
Controler
C2
SW2
VOUT
VOUT_S
C3
C9
MPPT
Controler
C6
C5
MPPT_OUT
R3
MPPT_IN
LOGIC
CSH1
VCC
C7
D2
DET0
DET1
BGR
C8
C11
FB
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 8-2)
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(*1)
Li-ion
Battery
MB39C831
4. Absolute Maximum Ratings
Table 4-1 Absolute Maximum Ratings
Parameter
Symbol
Rating
Condition
Min
Unit
Max
VDD input voltage
VDDMAX
VDD pin
-0.3
+7.0
V
VOUT input voltage
VOUTMAX
VOUT, VOUT_S pins
-0.3
+7.0
V
MPPT_ENA, ENA,
Input pin input voltage
VCC pin
S2, S1, S0,
VINPUTMAX
-0.3
CSH0, CSH1, CSH2,
voltage +0.3
V
( ≤ +7.0)
MPPT_IN, MPPT_OUT pins
Power dissipation
PD
Ta ≤ +25°C
-
2500(*1)
mW
Storage temperature
TSTG
-
-55
+125
o
ESD voltage1
VESDH
Human Body Model
-2000
+2000
V
ESD voltage2
VESDM
Machine Model
-200
+200
V
C
o
*1: In the case of θ ja (wind speed 0m/s) +28 C/W
Figure 4-1 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:
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.
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MB39C831
5. Recommended Operating Conditions
Table 5-1 Recommended Operating Conditions
Parameter
Symbol
VDD input voltage
VVDD
VOUT input voltage
VVOUT
Input pin input voltage
VINPUT
Operating ambient
temperature
Value
Condition
Min
VDD pin
Ta
VOUT pin
MPPT_ENA=H, ENA=H
MPPT_ENA, ENA,
S2, S1, S0 pins
-
Typ
Unit
Max
0.3
-
4.75
V
2.55
3
5.5
V
0
-
-40
-
VCC pin
voltage
V
C
+85
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
6. Electrical Characteristics
6.1 Electrical Characteristics of Constant Voltage Mode
Table 6-1 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
Minimum input voltage
at start-up
Preset output voltage
Symbol
Condition
MPPT_ENA
VSTART
VOUT
L
Current dissipation 1
ENA
IQIN
H
Value
Other
Min
Typ
Max
Unit
VDD pin, Ta = +25C
-
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, 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
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MB39C831
*1: This parameter is not be specified. This should be used as a reference to support designing the circuits.
6.2 Electrical Characteristics of Charge Mode
Table 6-2 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
Minimum input voltage
at start-up
MPPT setting
Symbol
Condition
MPPT_ENA
ENA
VSTART
MPPTSET
H
Value
Other
H
Min
Typ
Max
Unit
VDD pin, Ta = +25C
-
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
VOUT pin input current,
Current dissipation 2
IQOUT
UVLO detection voltage
VUVLOH
Upper threshold
0.2(*1)
0.3(*1)
0.4(*1)
V
(VDD detection voltage)
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
VCC detection voltage 2
VOUT detection voltage 2
VOUT detection voltage 3
VOUT=3.3V, IOUT=0
*1: This parameter is not be specified. This should be used as a reference to support designing the circuits.
6.3 Electrical Characteristics of Boost DC/DC Converter
Table 6-3 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
Condition
MPPT_ENA
ENA
ILIMIN_A
Value
Other
Min
Typ
Max
Unit
LX pin input current
-
200
‐
mA
VDD=0.6V, VOUT=3.3V
8
-
-
mA
VDD=3.0V, VOUT=3.3V
80
-
-
mA
PWM mode
0.87
1
1.13
MHz
Maximum output current
IOUT
Oscillation frequency
FOSC
Line regulation
VLINE
0.4V ≤ VDD ≤ VOUT 0.25V, IOUT=0
-
-
0.5
%
Load regulation
VLOAD
VDD=0.6V, VOUT=3.3V,
IOUT=0 to 8mA
-
-
0.5
%
Document Number: 002-08404 Rev *A
L or H
H
Page 8 of 40
MB39C831
7. Function
7.1 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.
7.2 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 7-1 Start-up/Shut-down Sequences of Constant Voltage Mode (MPPT_ENA=L, ENA=H)
0.35V
VDD Voltage
VST
startup voltage
0.2V
0V
0V
2.9V
VCC Voltage
0V
VCC=VOUT
2.6V
2.6V
0V
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 3-1).
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MB39C831
[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 3-1).
[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 3-1) 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.
[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.
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MB39C831
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 7-2 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
2.6V
VCC Voltage
VCC=VOUT
3.7V
2.55V
0V
0V
4V
VOUT=Li-ion Voltage(>=2.6V)
VOUT Voltage
0V
VOUT=Li-ion Voltage(>=2.55V)
3.7V
0V
2.55V
Battery Charging Operation
0V
LX
switching
VCC-VOUT
OFF
SW1
CSH1
OFF
ON
VCC/2
0V
0V
VCC/2
CSH2
0V
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 3-1).
[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 3-1) between VCC and VOUT is turned on. Then the DC/DC converter activates charging the Li-ion battery
(see Figure 3-1), 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 7.3).
[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 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.
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MB39C831
[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.
7.3 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 7-3 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
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MB39C831
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 3-1), 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.
(refer to Table 7-3 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.
1.
・In general, laminated capacitances have leak current. If the inside pulse cycle setting by the capacitors
2.
C7/C8 were set too long, the voltage level of the capacitors C5/C6 would drop. There is a possibility that
3.
the MPPT value cannot be set correctly.
4.
5.
・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 7-4 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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MB39C831
7.4 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 7-1 Mode Control
VOUT
detection 2
VOUT
detection 3
VOUT-VDD
voltage
reverse
detection
L
VOUT output stop
OFF
OFF
ON
OFF
ON
OFF
OFF
OFF
H
VOUT output enabled
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
ENA Pin
VOUT
detection 1
H
VCC detection
2
Charge
VCC detection
1
voltage
MPPT
L
Function
UVLO
Constan
t
pin
Mode
MPPT_ENA
Input
Signal
Operating State
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 7-2 Changing Preset Output Voltage in Constant Voltage Mode (MPPT_ENA = L, ENA = H)
Input Signal
MPPT_ENA pin
L
ENA pin
H
Document Number: 002-08404 Rev *A
Control
S2 pin
S1 pin
S0 pin
Preset Output Voltage (V)
L
L
L
3.0
L
L
H
3.3
L
H
L
3.6
L
H
H
4.1
H
L
L
4.5
H
L
H
5.0
H
H
L
Setting prohibited
H
H
H
Setting prohibited
Page 14 of 40
MB39C831
Table 7-3 Changing MPPT Setting in Charge Mode (MPPT_ENA = H, ENA = H)
Input Signal
MPPT_ENA pin
H
ENA pin
H
Control
S2 pin
S1 pin
S0 pin
MPPT Values
L
L
L
50%
L
L
H
55%
L
H
L
60%
L
H
H
65%
H
L
L
70%
H
L
H
75%
H
H
L
80%
H
H
H
85%
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.
Document Number: 002-08404 Rev *A
Page 15 of 40
MB39C831
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.
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 7-4 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
Document Number: 002-08404 Rev *A
Page 16 of 40
MB39C831
Table 7-5 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
H
H
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)
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.
Document Number: 002-08404 Rev *A
Page 17 of 40
MB39C831
8. Typical Applications Circuit
Constant Voltage Mode
Figure 8-1 Application Circuit of Constant Voltage Mode (MPPT_ENA = L, ENA = H)
L1 4.7µF
C1
10µF
Solar
Cell
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
Document Number: 002-08404 Rev *A
1µF
C3
10µF
Super
Cap
FB
VCC or GND
CSH2
47nF
CSH1
CSH0
MPPT_IN
Page 18 of 40
MB39C831
Charge Mode
Figure 8-2 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
33pF
Li-ion
Battery
FB
VCC or GND
S0
DET0
VCC or GND
S1
DET1
VCC or GND
S2
MPPT_OUT
CSH2
CSH1
CSH0
C8
C7
C6
C5
C4
47nF
100nF
4.7nF
3.3nF
470nF
Document Number: 002-08404 Rev *A
1µF
C3
VOUT_S
VCC
47nF
MPPT_IN
R1
R2
100kΩ
100kΩ
R3
200kΩ
C10
10nF
Page 19 of 40
MB39C831
Parts List
Table 8-1 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
Document Number: 002-08404 Rev *A
Page 20 of 40
MB39C831
9. 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).
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 9-1 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.
Document Number: 002-08404 Rev *A
Page 21 of 40
MB39C831
First of all, apply the following equation and calculate energy consumption for an application from voltage, current, and time
during an operation.
The energy stored on a capacitor is calculated by the following equation.
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 9-1). The η, the efficiency of the
MB39C831, is determined from the graph of the efficiency shown in Figure 10-1
dECin and dECout are the available energies for the application.
Figure 9-1 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.
PHarvester is a power generation capability of a harvester. An initial charging time (TInitial) is calculated by the following equation.
Repeat charging time (TRepeat) is calculated by the following equation. The TRepeat become shorter than TInitial.
Document Number: 002-08404 Rev *A
Page 22 of 40
MB39C831
10. Typical Characteristics
Figure 10-1 Typical Characteristics of Constant Voltage Mode (MPPT_ENA = L, ENA = H)
Line Regulation: VOUT vs
VDD
o
Line Regulation: VOUT vs
VDD
o
VDD = 0.6V, IOUT = 0A, Ta = 25 C
3.05
5.08
3.03
3.33
5.07
3.02
VOUT [V]
3.34
3.01
3.32
3.31
0.5
1.0
1.5
VDD [V]
2.0
2.5
0.5
1.0
1.5
2.0
VDD [V]
Data831001
2.5
3.0
5.04
0
3.5
Preset output voltage = 3.0V
3.00
3.31
VDD = 3.1V
3.30
VDD = 0.6V
1m
0.01
IOUT [A]
0.1
3.28
1µ
1
100
Preset output
voltage = 3.0V
0.1m
1m
0.01
IOUT [A]
0.1
VDD = 2.8V
Efficiency [%]
VDD = 0.6V
20
100
Document Number: 002-08404 Rev *A
0.1
1
Data831007
VDD = 3.1V
1m
0.01
IOUT [A]
0.1
1
Data831006
Ta = 25 C
VDD = 4.8V
80
60
VDD = 0.6V
40
1µ
0.1m
Preset output
voltage = 5.0V
20
0.1m
1m
0.01
Inductor current [A]
0.01m
Efficiency
vs Inductor current
o
Ta = 25 C
80
40
0.01m
5.01
1µ
1
Data831005
Preset output
voltage = 3.3V
60
0
1µ
5.03
Efficiency
vs Inductor current
o
Ta = 25 C
80
0.01m
Data831004
Efficiency
vs Inductor current
o
100
VDD = 4.8V
5.02
Efficiency [%]
0.1m
5.04
VDD = 0.6V
3.29
0.01m
Ta = 25 C
VDD = 0.6V
2.99
5
Data831003
5.05
VOUT [V]
VOUT [V]
VDD = 2.8V
4
Preset output voltage = 5.0V
3.32
3.01
3
Load Regulation:
VOUT vs IOUT
o
5.06
Preset output voltage = 3.3V
3.02
2
VDD [V]
Ta = 25 C
3.33
1
Data831002
Load Regulation:
VOUT vs IOUT
o
Ta = 25 C
2.98
1µ
5.06
5.05
3.30
0.0
3.0
Load Regulation:
VOUT vs IOUT
o
3.03
VOUT [V]
Preset output voltage = 5.0V
3.04
3.00
0.0
VDD = 0.6V, IOUT = 0A, Ta = 25 C
5.09
Preset output voltage = 3.3V
VOUT [V]
VOUT [V]
Preset output voltage = 3.0V
Efficiency [%]
Line Regulation: VOUT vs
VDD
o
VDD = 0.6V, IOUT = 0A, Ta = 25 C
3.35
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
Page 23 of 40
1
Data831009
MB39C831
420
Min. VDD input voltage in start-up
vs Temp.
IQOUT vs Temp.
Efficiency vs VDDo
VDD = 0V
4.0
IOUT = 10mA, Ta = 25 C
100
Preset output voltage = 3.0V
3.5
400
Preset output voltage = 3.0V
Preset output voltage = 3.6V
Preset output voltage = 5.0V
in applying 5.0V to VOUT
90
3.0
360
340
Efficiency [%]
IQOUT [µA]
VDD [mV]
380
2.5 in applying 3.6V to VOUT
2.0
1.5 in applying 3.0V to VOUT
80
70
60
1.0
320
-20
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
20
40
Temp. [oC]
60
40
0.0
80 85
80
70
60
50
40
Inductor current in start-up
vs VDD
100
30
20
25oC
－40oC
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
Document Number: 002-08404 Rev *A
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
70
60
25oC
40
30
1.0
90
80
50
0.5
Data831011
90
Inductor current in start-up [mA]
Inductor current in start-up [mA]
0
Preset output voltage = 3.6V
90
10
-20
－40oC
85oC
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]
Data831014
Inductor current in start-up [mA]
300
-40
100
50
0.5
80
－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
Page 24 of 40
MB39C831
70
60
50
40
30
20
80
50
40
30
20
0
3.0V
0
3.0V
3.6V
4.1V
4.5V
5.0V
Preset output voltages
Data831016
Maximum output current
vs Preset output voltages
VDD = 2.0V
250
300
－40oC
25oC
85oC
200
150
100
50
0
3.0V
60
3.3V
3.6V
4.1V
4.5V
5.0V
Preset output voltages
Data831019
－40oC
25oC
85oC
60
10
3.3V
100
70
10
300
Maximum output current [mA]
VDD = 0.6V
90
Maximum output current
vs Preset output voltages
－40oC
25oC
85oC
VDD = 1.0V
90
80
70
60
50
40
30
20
10
3.3V
0
3.0V
3.6V
4.1V
4.5V
5.0V
Preset output voltages
Data831017
Maximum output current
vs Preset output voltages
VDD = 3.0V
Maximum output current [mA]
Maximum output current [mA]
80
－40oC
25oC
85oC
Maximum output current
vs Preset output voltages
Maximum output current [mA]
VDD = 0.3V
90
100
250
－40oC
25oC
85oC
200
150
100
50
0
3.3V
3.3V
3.6V
4.1V
4.5V
5.0V
Preset output voltages
Data831018
Maximum
output current vs VDD
o
300
3.6V
4.1V
4.5V
Preset output voltages
5.0V
Data831020
Maximum output current : IOUT [mA]
Maximum output current
vs Preset output voltages
Maximum output current [mA]
100
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 = 25oC
MPPT_ENA = L, ENA = H
VOUT pin current [µA]
50
40
30
20
10
0
3.3V
3.6V
4.1V
4.5V
Preset output voltages
Document Number: 002-08404 Rev *A
5.0V
Data831022
Page 25 of 40
MB39C831
Figure 10-2 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
Document Number: 002-08404 Rev *A
Wave831004
Page 26 of 40
MB39C831
Figure 10-3 Typical Characteristics of Charge Mode (MPPT_ENA = H, ENA = H)
60
VOUT pin current
vs Preset output voltages
6.0
VDD = 0.6V, Ta = 25oC
MPPT_ENA = H, ENA = H
40
30
20
10
0
3.0V
VDD = 0V, Ta = 25oC
MPPT_ENA = H, ENA = H
5.0
VOUT pin current [µA]
VOUT pin current [µA]
50
VOUT pin current
vs VOUT
4.0
3.0
2.0
1.0
3.3V
3.6V
4.1V
4.5V
5.0V
Preset output voltages
Data831024
0
3.0
3.5
4.0
4.5
VOUT [V]
5.0
5.5
Data831025
Figure 10-4 Waveforms of VDD Pin Voltage in Charge Mode (MPPT_ENA = H, ENA = H)
Waveforms : Charge mode (MPPT mode)
VDD
200mV/DIV
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
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
Measurement of release voltage
0
Period of 1 cycle
Period of 1 cycle
1s/DIV
1s/DIV
Wave831005
Document Number: 002-08404 Rev *A
Wave831006
Page 27 of 40
MB39C831
11. 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
(*1)
VOUT_S pin is very sensitive to noise so that the wiring should keep away from the switching parts . 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 3-1.
VCC
C2
VOUT
LX
PGND2
VOUT_S
VST
PGND1
VDD
D1
C11
Figure 11-1 Example of a Layout Design
C9
C3
C4-C8
Top Layer
Document Number: 002-08404 Rev *A
R3,R2
R1,C10
Back Layer
C1
through-holes
L1
feedback wiring pattern
Page 28 of 40
MB39C831
12. 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.
13. Ordering Information
Table 13-1 Ordering Information
Part Number
MB39C831QN
Package
40-pin plastic QFN
(LCC-40P-M63)
14. Marking
Figure 14-1 Marking
MB 3 9 C 8 3 1
E2
INDEX
Document Number: 002-08404 Rev *A
Lead free mark
Page 29 of 40
MB39C831
15. Product Labels
Figure 15-1 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
Document Number: 002-08404 Rev *A
Page 30 of 40
MB39C831
Figure 15-2 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.
Document Number: 002-08404 Rev *A
Page 31 of 40
MB39C831
Figure 15-3 Reel Label [Reel Label (4 × 2.5inch)]
Ordering Part Number
(P)+Part No.
Mark lot information
Quantity
Figure 15-4 Reel Label [Dry Pack & Reel Label (4 × 2.5inch)]
Document Number: 002-08404 Rev *A
Page 32 of 40
MB39C831
Figure 15-5 Outer Box Label [Shopping Label (4 × 8.5inch)]
Quantity
Document Number: 002-08404 Rev *A
Ordering Part Number : (1P)+Part No.
Page 33 of 40
MB39C831
16. Recommended Mounting Conditions
Table 16-1 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
use within 7 days (Please remember baking is up to 2 times).
of floor life(*1)
Floor life
condition
Between 5°C and 30°C and also below 60%RH required.
(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 16-1 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
Document Number: 002-08404 Rev *A
Page 34 of 40
MB39C831
Table 16-2 Recommended Mounting Conditions (J-STD-020D)
(Temperature on the top of the package body is measured.)
260°C Max.
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.
Document Number: 002-08404 Rev *A
Page 35 of 40
MB39C831
17. 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.
Document Number: 002-08404 Rev *A
Page 36 of 40
MB39C831
18. 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
table.
11, 12
9.Electrical Characteristics
Added ENA=H into the condition on the table.
Changed the Input power supply current condition
14
16
18
19, 20
10.Function
10.3 MPPT control
10.4 Function
Added more description
UVLO
Changed the sentence "This function is independent of MPPT_ENA." to"
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
Table 9-1, Table 9-2
10.2 Start-up/Shut-down sequence
Figure 10-1
10.2 Start-up/Shut-down sequence
Figure 10-2
10.4 Function description
Table 10-2, Table 10-3
The table of the electrical characteristics was divided into that of the
constant voltage mode and that of charge mode
Added the sequences of MPPT_ENA, ENA, DET1, and DET0 pins.
Added the sequences of MPPT_ENA, ENA, DET1, and DET0 pins.
The table of the preset output voltage and the MPPT setting was divided
into that of the preset output voltage and that of the MPPT setting.
10.4 Function description
21
State notification
The table of the state notification was divided into that of the constant
voltage mode and that of charge mode
Table 10-4, Table 10-5
25, 26
12. Application Notes
Added the 12. Application Notes
27 to 31
13. Typical Characteristics
Added the 13. Typical Characteristics
32
14. Layout for Printed Circuit Board
Added the 14. Layout for Printed Circuit Board
36 to 39
18. Product Labels
Changed the 18. Product Labels
Revision 3.0 [October 10, 2014]
3
1. Description
Document Number: 002-08404 Rev *A
Made a change in the sentence.
(MPPT) → (MPPT: Maximum Power Point Tracking)
Page 37 of 40
MB39C831
21
24
26
10.4 Function description
Added a following sentence.
State notification
“The state notification is not a power good function”
11. Typical Applications Circuit
Made a correction in the part number C6.
Table 11-1 Parts list
4.7 pF → 4.7 nF
12. Application Notes
Added a note in the “Figure 12-1 Application example using the power
gating”
Figure 12-1
Page
37
Section
Change results
19. Recommended Mounting Conditions
Made a correction in the floor life condition.
Table 19-1
70%RH → 60%RH
Revision 4.0
7
11
12
5. Pin Descriptions
Added descriptions for all N.C. pins in “Table 5-1 Pin descriptions”
“Non connection pin” → “Non connection pin (Leave this pin open)”
9. Electrical Characteristics
Changed the parameter names in “Table 9-1”
9.1 Electrical Characteristics of Constant
“Input power supply current” → “Current dissipation 1 “
Voltage Mode
“Current dissipation” → “Current dissipation 2 “
9. Electrical Characteristics
9.2 Electrical Characteristics of Charge Mode
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
13
14, 15
16, 17
18 to 20
9.3 Electrical Characteristics of Boost DC/DC
Converter
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
Deleted the “*2” annotation
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”
32
16. Ordering Information
Deleted the “Table 16-2 EVB Ordering information”
“Efficiency vs IOUT” → “Efficiency vs Inductor current”
NOTE: Please see “Document History” about later revised information.
Document Number: 002-08404 Rev *A
Page 38 of 40
MB39C831
Document History
Document Title: MB39C831 Ultra Low Voltage Boost Power Management IC for Solar/Thermal Energy Harvesting
Datasheet
Document Number: 002-08404
Revision
ECN
Orig. of
Change
Submission
Date
**

TAOA
01/30/2015
*A
5121759
TAOA
02/04/2016 Updated to Cypress template
Document Number: 002-08404 Rev *A
Description of Change
Migrated to Cypress and assigned document number 002-08404.
No change to document contents or format.
Page 39 of 40
MB39C831
Sales, Solutions, and Legal Information
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cypress.com/spansion products
Cypress®, the Cypress logo, Spansion®, the Spansion logo, MirrorBit®, MirrorBit® EclipseTM, ORNANDTM, Easy DesignSimTM, TraveoTM and combinations thereof, are trademarks and
registered trademarks of Cypress Semiconductor Corp. ARM and Cortex are the registered trademarks of ARM Limited in the EU and other countries. All other trademarks or registered
trademarks referenced herein are the property of their respective owners.
© Cypress Semiconductor Corporation, 2015-2016. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for
the use of any circuitry other than circuitry embodied in a Cypress product. Nor does it convey or imply any license under patent or other rights. Cypress products are not warranted nor
intended to be used for medical, life support, life saving, critical control or safety applications, unless pursuant to an express written agreement with Cypress. Furthermore, Cypress does not
authorize its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion
of Cypress products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress against all charges.
This Source Code (software and/or firmware) is owned by Cypress Semiconductor Corporation (Cypress) and is protected by and subject to worldwide patent protection (United States and
foreign), United States copyright laws and international treaty provisions. Cypress hereby grants to licensee a personal, non-exclusive, non-transferable license to copy, use, modify, create
derivative works of, and compile the Cypress Source Code and derivative works for the sole purpose of creating custom software and or firmware in support of licensee product to be used
only in conjunction with a Cypress integrated circuit as specified in the applicable agreement. Any reproduction, modification, translation, compilation, or representation of this Source Code
except as specified above is prohibited without the express written permission of Cypress.
Disclaimer: CYPRESS MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARD TO THIS MATERIAL, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Cypress reserves the right to make changes without further notice to the materials described
herein. Cypress does not assume any liability arising out of the application or use of any product or circuit described herein. Cypress does not authorize its products for use as critical
components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress’ product in a life-support
systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress against all charges.
Use may be limited by and subject to the applicable Cypress software license agreement.
Document Number: 002-08404 Rev *A
Page 40 of 40