PCN20070801

Product Change Notices
PCN No.:20070801
Date: 08//21/2007
This is to inform you that AME5131 datasheet has been changed from Rev. C.01 to
Rev. D.01. This notification is for your information and concurrence.
If you require data or samples to qualify this change, please contact AME, Inc.
within 30 days of receipt of this notification.
If we do not receive any response from you within 30 calendar days from the
date of this notification, we will consider that you have accepted this PCN.
If you have any questions concerning this change, please contact:
PCN Originator:
Name: Rellik Sung
Email: [email protected]
Expected 1st Device Shipment Date: Aug/21/2007
Earliest Year/Work Week of Changed Product: 0712
Reason for Change:
After volume evaluation and market survey we changed switch current limit as:
1. Lower min. spec of SW current limit from 350mA to 300mA
2. keep max. spec unchanged ( 450 mA) and change typical to 375mA.
QPM018B-B
AME, Inc.
Low Power
DC/DC Boost Converter
AME5131
n General Description
The AME5131 is a high-frequency boost converter dedicated for LCD bias supply and white LED applications for
cellular phone backlighting, PDAs, and other hand-held
devices. The part can also be used to generate standard
3.3V / 5V to 12 V power conversions.
The AME5131 has an internal 400mA switch current
limit, offering lower output voltage ripple. The 32µA low
quiescent current together with an optimized control
scheme, allows device operation at high efficiencies and
maintains long battery lifetime. AME5131 uses SOT-25
package and gives a small size solution.
n Function Block Diagram
On / Off Time
Controller
UVP
SW
VIN
_
Boost
Controller
+
FB
Bandgap
Driver
+
_
GND
Enable
Soft Start
EN
n Features
l 0.6Ω Internal Switch
n Typical Application
l 1.8V to 5.5V Input Range
l Adjustable Output Voltage Up to 28V
l Input Under Voltage Protection
l 32µA Typical No Load Quiescent Current
l 1µA Shutdown Current
L1
10μH
VIN
D1
VIN ~28 V
l SOT-25 Package
5
l All AME's Lead Free Products Meet RoHS
Standards
IN
SW
AME5131
CIN
4.7μF
n Applications
VOUT
1.8 V-5.5 V
FB
4
EN
GND
1
R1
2.1M
CFF
22PF
CO
1μF
3
2
R2
150K
l White LED Back-Lighting
l Hand-held Devices
l Digital Cameras
l Portable Applications
l Internet Audio Player
l LCD Bias Power
l Standard 3.3V / 5V to 12V Conversions
Rev.D.01
1
AME, Inc.
Low Power
DC/DC Boost Converter
AME5131
n Pin Configuration
SOT-25
Top View
5
AME5131AEEV
4
1. SW
2. GND
AME5131
3. FB
4. EN
5. IN
1
2
3
* Die Attach:
Conductive Epoxy
n Pin Description
Pin Number
Pin Name
Pin Description
1
SW
This is the switch pin and is connected to the drain of the internal
NMOS power switch. Minimize the metal trace area connected to this
pin to minimize EMI.
2
GND
Ground Pin.
3
FB
Feedback Input Pin.
Connect this pin to the external voltage divider to program the desired
output voltage.
4
EN
Enable Control Input Pin. (Active High)
5
IN
Input Supply Pin.
Place bypass capacitor as close to VIN as possible.
2
Rev.D.01
AME, Inc.
Low Power
DC/DC Boost Converter
AME5131
n Ordering Information
AME5131 x x x x xxx x
Special Feature
Output Voltage
Number of Pins
Package Type
Operating Ambient Temperature Range
Pin Configuration
Pin
Configuration
A
(SOT-25)
1. SW
2. GND
3. FB
4. EN
5. IN
Operating Ambient
Package Type
Temperature Range
Number
of
Pins
Output Voltage
E: -40OC to 85OC
V: 5
ADJ: Adjustable
E: SOT-2X
Special Feature
Z:
Lead free
n Ordering Information
Part Number
Marking*
Output Voltage
Package
Operating Ambient
Temperture Range
AME5131AEEVADJZ
BEFww
ADJ
SOT-25
-40OC to 85OC
Note: ww represents the date code and pls refer to Date Code Rule page on Package Dimension.
* A line on top of the first letter represents lead free plating such as BEFww.
Please consult AME sales office or authorized Rep./Distributor for the availability of package type.
Rev.D.01
3
AME, Inc.
Low Power
DC/DC Boost Converter
AME5131
n Absolute Maximum Ratings
Parameter
Symbol
Maximum
V IN
6
V EN , VFB
VIN
VSW
30
Input Supply Voltage
EN, FB Voltages
SW Voltage
Unit
V
C*
ESD Classification
Caution: Stree above the listed absolute maximum rating may cause permanent damage to the device.
HBM C: 4000V+
n Recommended Operating Conditions
Parameter
Symbol
Rating
Ambient Temperature Range
TA
-40 to 85
Junction Temperature Range
TJ
-40 to 125
Storage Temperature Range
TSTG
-65 to 150
Unit
O
C
n Thermal Information
Parameter
Package
Die Attach
Thermal Resistance*
(Junction to Case)
Thermal Resistance
(Junction to Ambient)
SOT-25
Conductive Epoxy
Internal Power Dissipation
Symbol
Maximum
Unit
θJC
81
o
θJA
260
o
PD
400
C/W
C/W
mW
Maximum Junction Temperature
150
o
C
Solder Iron (10 Sec)**
350
o
C
* Measure θJC on center of molding compound if IC has no tab.
** MIL-STD-202G210F
4
Rev.D.01
AME, Inc.
Low Power
DC/DC Boost Converter
AME5131
n Electrical Specifications
VIN = 2.4V, EN = VIN, T A = -40oC to 85oC, typical values are at T A = 25oC
Parameter
Input Voltage
Symbol
Test Condition
VIN
Min
Typ
1.8
Max
Units
5.5
V
Quiescent Current
IQ
IOUT = 0mA, not switching, VFB = 1.3V
32
50
Shutdown Current
ISD
EN = GND
0.1
1
FB Pin Bias Current
IFB
VFB = 1.3V
Feedback Trip Point
VFB
1.8V ≦ V IN ≦ 5.5V
UVP Voltage
UVP
µA
1
1.187
1.212 1.237
V
1.5
1.7
V
375
450
mA
ICL
VOUT = 18V, IOUT = 10mA, TA=25oC
RDSON
VIN = 2.4V; ISW = 200mA
0.6
1
Ω
SW leakage current
ISW
VSW = 28V
1
10
µA
Switch Off Time
t OFF
400
ns
Switch On Time
t ON
6
µs
EN Input Current
IEN
EN = GND or VIN
EN Input Threshold (High)
VEH
Device Active
EN Input Threshold (Low)
VEL
Device Shutdown
Switch Current Limit
Switch RDSON
Line Regulation
REGLINE
Load Regulation
REGLOAD
Rev.D.01
1.8≦V IN ≦5.5V; VOUT =18V;
ILOAD =10mA; Cff = not connected
VIN =2.4V; VOUT =18V;
0mA≦ IOUT≦ 30mA
300
0.1
1
1.3
µA
V
0.4
V
0.3
%/V
0.15
%/mA
5
AME, Inc.
AME5131
Low Power
DC/DC Boost Converter
n Detailed Description
Operation
The AME5131 is a boost converter with a smart control
scheme that operates in a pulse frequency modulation
(PFM) with constant peak current control.
The smart control schemes utilize a reference voltage,
minimum off-time, maximum on-time and current-limited
control scheme. The switch turns off as the inductor current reaches the internally set peak current of 400mA
(typical). The second criteria that turns off the switch is
the maximum on-time of 6µs (typical). As the switch is
turned off the external Schottky diode is forward biased
delivering the current to the output. The switch remains
off for a minimum of 400 ns (typical), or until the feedback
voltage drops below the reference voltage.
Using this PFM peak current control scheme the converter operates in discontinuous conduction mode (DCM)
where the switching frequency depends on the output
current, which results in high efficiency over the entire
load current range. This regulation scheme is inherently
stable, allowing a wider selection range for the inductor
and output capacitor.
Soft-start
Soft-start is provided on the AME5131 to minimize inrush current. All inductive boost converters exhibit high
inrush current during start-up if no special precaution is
made. This can cause voltage drops at the input rail during start up and may result in an unwanted or early system shut down.
The soft-start time is set by increasing the current limit
in two steps starting from 100mA for 256 cycles to 200mA
for the next 256 cycles, and then full current limit.
6
Rev.D.01
AME, Inc.
Low Power
DC/DC Boost Converter
AME5131
n External Resistor Divider Selection Reference
R2 (KOhm)
150
160
170
180
190
200
R1(KOhm)=(V OUT/(1.212/R2))-R2
V OUT
6
593
632
672
711
751
790
7
716
764
812
860
907
955
8
840
896
952
1008
1064
1120
9
964
1028
1092
1157
1221
1285
10
1088
1160
1233
1305
1378
1450
11
1211
1292
1373
1454
1534
1615
12
1335
1424
1513
1602
1691
1780
13
1459
1556
1653
1751
1848
1945
14
1583
1688
1794
1899
2005
2110
15
1706
1820
1934
2048
2161
2275
16
1830
1952
2074
2196
2318
2440
17
1954
2084
2214
2345
2475
2605
18
2078
2216
2355
2493
2632
2770
19
2201
2348
2495
2642
2789
2935
20
2325
2480
2635
2790
2945
3100
21
2449
2612
2776
2939
3102
3265
22
2573
2744
2916
3087
3259
3430
23
2697
2876
3056
3236
3416
3595
24
2820
3008
3196
3384
3572
3760
25
2944
3140
3337
3533
3729
3925
26
3068
3272
3477
3681
3886
4090
27
3192
3404
3617
3830
4043
4255
28
3315
3536
3757
3978
4199
4420
Note1: The output voltage is calculated as: VOUT = 1.212V x ( 1 +
R1
)
R2
Table1: Resisters variation & VOUT variation (@VFB=1.212V)
± 1%
R2
± 1%
R1
± 2%
± 3%
± 4%
± 5%
R1/R2
4
22
4
22
4
22
4
22
4
22
Vout ( ± )
1.6%
1.9%
2.4%
2.9%
3.2%
3.9%
4.0%
4.8%
4.8%
5.8%
Note2: From Table1’data shown, VOUT tolerence could match to sum of R1 tolence and R2 tolence.
Rev.D.01
7
AME, Inc.
Low Power
DC/DC Boost Converter
AME5131
Efficiency vs Output Current
Efficiency vs Input Voltage
90
100
Io=5mA
90
80
VIN=5.0V
Io=10mA
70
VIN=3.6V
70
Efficiency (%)
Efficiency(%)
80
VIN=2.4V
60
50
40
30
50
40
30
20
20
10
10
0
60
0
1
0
1.8
100
10
2
2.5
3
3.5
4
4.5
Output Current (mA)
Input Voltage (V)
VOUT vs IOUT
VOUT vs VIN
Quiescent Current vs Input Voltage
5
5.5
6
Feedback Voltage vs Temperature
1.240
60
TA=85 C
50
40
Feedback Voltage (V)
Quiescent Current (µA)
1.235
o
TA=25oC
30
TA=-40oC
20
1.230
1.225
1.220
1.215
1.210
1.205
1.200
1.195
1.190
1.185
10
1.2
1.8
2.4
3
3.6
4.2
4.8
Input Voltage (V)
8
5.4
6
6.6
1.180
-40
-20
0
20
40
60
80
100
120
Temperature (oC)
Rev.D.01
AME, Inc.
Low Power
DC/DC Boost Converter
AME5131
RDSON vs Temperture
RDSON vs Input Voltage
1000
1200
900
800
700
800
RDSON (mΩ)
RDSON (mΩ)
1000
600
400
600
500
400
300
200
200
100
0
-20
-10
0
10
20
30
40
50
o
60
70
80
90
0
1.8
2.4
3
3.6
4.2
4.8
Temperature ( C)
Input Voltage (V)
Load Transient Response
Line Transient Response
VIN
5.4
6
3.4V
2.4V
VOUT
100mV/div
VOUT
100mV/div
10mA
IOUT
1mA
200µS/div
200µS/div
Start Up Behavior
5V/div
1V/div
VOUT
EN
50mA/div
IIN
Time
Rev.D.01
9
AME, Inc.
Low Power
DC/DC Boost Converter
AME5131
n Date Code Rule
Marking
Date Code
Year
A
A
A
W
W
xxx0
A
A
A
W
W
xxx1
A
A
A
W
W
xxx2
A
A
A
W
W
xxx3
A
A
A
W
W
xxx4
A
A
A
W
W
xxx5
A
A
A
W
W
xxx6
A
A
A
W
W
xxx7
A
A
A
W
W
xxx8
A
A
A
W
W
xxx9
n Tape and Reel Dimension
SOT-25
P
W
AME
AME
PIN 1
Carrier Tape, Number of Components Per Reel and Reel Size
10
Package
Carrier Width (W)
Pitch (P)
Part Per Full Reel
Reel Size
SOT-25
8.0±0.1 mm
4.0±0.1 mm
3000pcs
180±1 mm
Rev.D.01
AME, Inc.
Low Power
DC/DC Boost Converter
AME5131
n Package Dimension
SOT-25
Top View
Side View
SYMBOLS
D
E
H
L
MIN
θ1
S1
A
MAX
0.0472REF
0.15
0.0000
0.0059
b
0.30
0.55
0.0118
0.0217
D
2.70
3.10
0.1063
0.1220
E
1.40
1.80
0.0551
0.0709
e
θ1
S1
1.90 BSC
2.60
3.00
0.37BSC
0o
10 o
0.95BSC
0.07480 BSC
0.10236 0.11811
0.0146BSC
0o
10 o
0.0374BSC
A1
A
Rev.D.01
1.20REF
MIN
0.00
L
Front View
MAX
INCHES
A1
H
e
b
MILLIMETERS
11
www.ame.com.tw
E-Mail: [email protected]
Life Support Policy:
These products of AME, Inc. are not authorized for use as critical components in life-support
devices or systems, without the express written approval of the president
of AME, Inc.
AME, Inc. reserves the right to make changes in the circuitry and specifications of its devices and
advises its customers to obtain the latest version of relevant information.
 AME, Inc. , Auguest 2007
Document: 1115-DS5131-D.01
Corporate Headquarter
U.S.A.(Subsidiary)
AME, Inc.
Analog Microelectronics, Inc.
2F, 302 Rui-Guang Road, Nei-Hu District
3100 De La Cruz Blvd., Suite 201
Taipei 114, Taiwan, R.O.C.
Tel: 886 2 2627-8687
Santa Clara, CA. 95054-2438
Tel : (408) 988-2388
Fax: 886 2 2659-2989
Fax: (408) 988-2489