ame5131 AME, Inc., ame5131 Datasheet

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ame5131

Manufacturer Part Number
ame5131
Description
Low Power Dc/dc Boost Converter
Manufacturer
AME, Inc.
Datasheet

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Part Number:
ame5131AEEVADJZ
Manufacturer:
AME
Quantity:
20 000
n General Description
cated 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.
limit, offering lower output voltage ripple. The 32 A 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.
Rev.E.02
AME5131
n Features
n Applications
The AME5131 is a high-frequency boost converter dedi-
The AME5131 has an internal 400mA switch current
l 0.6
l 1.8V to 5.5V Input Range
l Adjustable Output Voltage Up to 28V
l Input Under Voltage Protection
l 32 A Typical No Load Quiescent Current
l 1 A Shutdown Current
l SOT-25 Package
l All AME's Lead Free Products Meet RoHS
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
Standards
AME, Inc.
Internal Switch
1.8 V-5.5 V
n Typical Application
n Function Block Diagram
4.7μF
V
FB
EN
IN
C
V
IN
IN
Bandgap
Enable
UVP
5
4
DC/DC Boost Converter
IN
AME5131
EN
_
+
10μH
L1
GND
Soft Start
SW
FB
On / Off Time
Controller
Controller
Boost
2
1
3
2.1M
D1
R1
+
_
150K
R2
Low Power
Driver
C
22PF
FF
V
V
OUT
IN
1μF
C
~28 V
O
GND
SW
1

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ame5131 Summary of contents

Page 1

... AME, Inc. AME5131 n General Description The AME5131 is a high-frequency boost converter dedi- cated 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. power conversions. ...

Page 2

... Pin Name GND AME5131AEEV GND Die Attach: Conductive Epoxy 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. Ground Pin. ...

Page 3

... AME, Inc. AME5131 n Ordering Information AME5131 xxx x Pin Operating Ambient Configuration Temperature Range - GND (SOT-25 Ordering Information Part Number Marking* AME5131AEEVADJZ Note: ww represents the date code and pls refer to Date Code Rule page on Package Dimension. ...

Page 4

... AME, Inc. AME5131 n Absolute Maximum Ratings Parameter Input Supply Voltage EN, FB Voltages SW Voltage 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 Ambient Temperature Range Junction Temperature Range ...

Page 5

... AME, Inc. AME5131 n Electrical Specifications V = 2.4V - Parameter Input Voltage Quiescent Current Shutdown Current FB Pin Bias Current Feedback Trip Point UVP Voltage Switch Current Limit Switch R DSON SW leakage current Switch Off Time Switch On Time EN Input Current EN Input Threshold (High) ...

Page 6

... AME, Inc. AME5131 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 cur- rent reaches the internally set peak current of 400mA (typical) ...

Page 7

... AME, Inc. AME5131 n External Resistor Divider Selection Reference R2 (KOhm) 150 V OUT 6 593 7 716 8 840 9 964 10 1088 11 1211 12 1335 13 1459 14 1583 15 1706 16 1830 17 1954 18 2078 19 2201 20 2325 21 2449 22 2573 23 2697 24 2820 25 2944 26 3068 27 3192 28 3315 Note1: The output voltage is calculated as: V Table1: Resisters variation & ± ...

Page 8

... AME, Inc. AME5131 Efficiency vs Output Current 100 90 V =5. 0 Output Current (mA OUT OUT =2. =18V OUT 0 (mA) OUT Quiescent Current vs Input Voltage 60 V =18V OUT 1.2 1 ...

Page 9

... AME, Inc. AME5131 R vs Temperture DSON 1200 V =18V OUT 1000 800 600 400 200 0 -20 - Temperature ( Load Transient Response V =18V OUT V OUT I OUT 200 S/div Start Up Behavior V =18V OUT V OUT Time Rev.E. 100 mV/div ...

Page 10

... AME, Inc. AME5131 n Date Code Rule Marking Date Code Tape and Reel Dimension SOT-25 PIN 1 Carrier Tape, Number of Components Per Reel and Reel Size ...

Page 11

... AME, Inc. AME5131 n Package Dimension SOT-25 Top View Front View b Rev.E.02 DC/DC Boost Converter Side View SYMBOLS θ Low Power MILLIMETERS INCHES MIN MAX MIN MAX 1.20REF 0.0472REF 0.00 0.15 0.0000 0.0059 0.30 0.55 0.0118 0.0217 2.70 3.10 0.1063 0.1220 1.40 1.80 0.0551 0.0709 1 ...

Page 12

... 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 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. ...

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