AMS1318 Datasheet, PDF (1/6 Pages) Advanced Monolithic Systems Ltd – Cellular and Smart Phones PDAs

■ General Description
AMS1318 series is a group of high efficiency
synchronous-rectification type buck regulator using a
constant frequency, current mode architecture. The device
is available in an adjustable version and fixed output
voltages of 1.8V and 3.3V. Automatic PWM/PFM mode
operation increases efficiency and decreases output
voltage ripple at light loads, further extending battery life.
Switching frequency is internally set at 1.4MHz, allowing
the use of small surface mount inductors and capacitors.
100% duty cycle provides low dropout operation.
■ Features
 High Efficiency: 92％
 Input Voltage Range: 2.0 ~ 6.0V
 Output Current: 800mA
 Shutdown Current: <1uA
 Oscillation Frequency: 1.4MHz
■ Typical Application Circuit
AMS1318
■ Applications
 Cellular and Smart Phones
 PDAs
 MP3/MP4 Player
 Digital Still and Video Cameras
 Microprocessors and DSP Core Supplies
 Portable Instruments
■ Package
 SOT-23-5L
5
4
FB/VOUT
VIN
CE GND LX
123
(Top View)
■ Ordering Information
AMS1318 ①②③④⑤
Designator
①
1
②
2
③
④
⑤
Symbol
1
3
8
3
F
M
S
R
Description
4 Output Voltage: 1.2V、1.8V、3.3V、4.2V
2 Adjustable version: ① ② fixed as 00
Oscillation Frequency 1.4MHz
Package Types: SOT-23-5
Embossed Tape :Standard Feed
Embossed Tape :Reverse Feed
1
Advanced Monolithic Systems http://www.ams-semitech.com