AMS1027 Datasheet, PDF (1/5 Pages) Advanced Monolithic Systems Ltd – On Board Power MOSFET

DESCRIPTION
The AMS1027 is a 5-pin thin SOT23 current
mode step up converter intended for small, low
power applications. The AMS1027 switches at
1.3MHz and allows the use of tiny, low cost
capacitors and inductors 2mm or less in height.
Internal soft start results in small inrush current
and extends battery life.The AMS1027 operates
from an input voltage as low as 2.5V and can
generate 12V at up to 200mA from a 5V supply.
The AMS1027 includes under-voltage lockout,
current limiting, and thermal overload protection
to prevent damage in the event of an output
overload. The AMS1027 is available in a small
5-pin SOT23 package.
AMS1027
FEATURES
ƒ On Board Power MOSFET
ƒ Uses Tiny Capacitors and Inductors
ƒ 1.3MHz Fixed Switching Frequency
ƒ Internally Compensated
ƒ Internal Soft-Start
ƒ Operates with Input Voltage as Low as 2.5V
and Output Voltage as High as 22V
ƒ 12V at 200mA from 5V Input
ƒ UVLO, Thermal Shutdown
ƒ Internal Current Limit
ƒ Available in a SOT23-5 Package
APPLICATIONS
ƒ Camera Phone Flash
ƒ Handheld Computers and PDAs
ƒ Digital Still and Video Cameras
ƒ External Modems
ƒ Small LCD Displays
ƒ White LED Driver
TYPICAL APPLICATION
D1
V_IN
5V
OFF ON
5
1
4 ^IN
SW
EN
AMS1027
2 _GND
FB ³
V_OUT
12V
200mA
Vout=1.25(1+R1/R2) (V)
1
Advanced Monolithic Systems http://www.ams-semitech.com