AMS1027 AMS [Advanced Monolithic Systems Ltd], AMS1027 Datasheet

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AMS1027

Manufacturer Part Number
AMS1027
Description
On Board Power MOSFET
Manufacturer
AMS [Advanced Monolithic Systems Ltd]
Datasheet
TYPICAL APPLICATION
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.
OFF ON
V
5V
IN
4
2
EN
GND
IN
Advanced Monolithic Systems http://www.ams-semitech.com
Vout=1.25(1+R1/R2) (V)
AMS1027
5
SW
FB
1
3
D1
1
V
12V
200mA
FEATURES
APPLICATIONS
OUT
12V at 200mA from 5V Input
On Board Power MOSFET
Uses Tiny Capacitors and Inductors
1.3MHz Fixed Switching Frequency
Internally Compensated
Internal Soft-Start
Operates with Input Voltage as Low as 2.5V
and Output Voltage as High as 22V
UVLO, Thermal Shutdown
Internal Current Limit
Available in a SOT23-5 Package
Camera Phone Flash
Handheld Computers and PDAs
Digital Still and Video Cameras
External Modems
Small LCD Displays
White LED Driver
AMS1027

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AMS1027 Summary of contents

Page 1

... 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. TYPICAL APPLICATION V IN ...

Page 2

... OUT Operating Temperature............. –40°C to +85°C Functional Block Diagram - ERROR AMPLIFIER 1.25V 1.3MHz Advanced Monolithic Systems http://www.ams-semitech.com PACKAGE REFERENCE TOP VIEW GND CONTROL LOGIC - PWM COMPARATOR + OSC 2 AMS1027 CURRENT 2 SENSE AMPLIFIER GND ...

Page 3

... Advanced Monolithic Systems http://www.ams-semitech.com Symbol Condition 1. Rising EN V Rising 2. 0V 1.25V (ON 15V SW 3 AMS1027 Min Typ Max Units 2 2.25 2. 0.1 1 µA 635 850 µA 1.0 1.3 1.5 MHz 1.1 1.35 1 µA 1.21 1.25 1 ...

Page 4

... TYPICAL APPLICATION CIRCUITS 12V 200mA Boost Circuit IN OUT OUT OFF ON EN AMS1027 3 2 GND FB Advanced Monolithic Systems http://www.ams-semitech.com D1 MBR0520L V OUT 12V 200mA C3 100pF 4 AMS1027 ...

Page 5

... PACKAGE INFORMATION 2.80 3. TOP VIEW 0.84 0.90 0.30 0.95 BSC 0.50 FRONT VIEW Advanced Monolithic Systems http://www.ams-semitech.com SOT23-5 1.50 2.60 1.70 3.00 1.00 MAX SEATING PLANE 0.00 0.10 NOTE: ALL DIMENSIONS ARE IN MILLIMETERS. 5 AMS1027 0.09 0.20 SIDE VIEW ...

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