AME5172 Datasheet, PDF (1/12 Pages) Analog Microelectronics – 0.85V Single Cell Boost DC-DC Converter

AME, Inc.
AME5172
n General Description
The AME5172 is a high-efficiency, current mode, syn-
chronous PWM Boost DC-DC Converter with fixed 3.3V
output voltage for system applications powered by single
or double cell NiMH or Alkaline battery pack.
Built-in 0.35Ω NMOS switch and 0.45Ω PMOS syn-
chronous rectification significantly improves efficiency and
reduces external components count. High switching fre-
quency (at 1.2MHz) allows easy filtering and faster loop
performance.
AME5172 uses SOT-25 package that gives a small size
solution.
0.85V Single Cell Boost
DC-DC Converter
n Typical Application
L1
4.7µH
V_IN
C_IN
4.7µF _{1 IN}
SW ⁵
AME5172
4
OUT
OFF _ON
3
EN
2
GND
V_OUT 3.3V
up to 200mA
C_OUT
4.7µF
n Features
l PWM Control with 1.2MHz Fixed Frequency
l Up to 92% Efficiency
l 0.85V Low Start-up Input Voltage
l Internal Synchronous Rectifier
l Fixed 3.3V Output Voltage Options
l 0.8A, 0.35Ω Power MOSFET
l 1µA Shutdown Current
l True Shutdown
l SOT-25 Package
l All AME's Lead Free Products Meet RoHS
Standards
n Applications
l Hand-held Devices
l Digital Cameras
l Portable Applications
l MP3 Players
l LCD Bias Power
l Wireless Handsets
Rev. A.02
1