AME5150 Datasheet, PDF (1/14 Pages) Analog Microelectronics – Micropower Inverting DC/DC Converter

AME, Inc.
AME5150
n General Description
The AME5150 is an inverting DC/DC converter operat-
ing from 1.5V to 5.5V input voltage range. It is capable of
producing up to -28V of regulated negative output volt-
age. Built-in current-limit and fixed off-time control scheme
of AME5150 provides high efficiency over a wide range of
load conditions.
Low supply current, 400ns fixed off-time, small pack-
age, and tiny external components makes AME5150 a
extremely compact and high efficiency voltage biasing
solution for battery-powered application. The AME5150
is available in a small SOT-25/TSOT-25 packages.
Micropower Inverting
DC/DC Converter
n Typical Application
V_IN
1.5V~5.5V
L1
10µH
C2
0.47µF
L2
10µH
-15V
C1
4.7µF
IN
SW
AME5150
EN
NFB
GND
CF
D1 ^15pF
R2
267KΩ
C3
R1 ^4.7µF
24.9KΩ
Figure. 1
1-cell Li-lon to -15V inverting converter
n Features
l 1Ω Internal Switch
l Use Small Surface Mount Components
l Adjust Output Voltage up to -28V
l 1.5V to 5.5V Input Voltage Range
l Input under Voltage Lockout
l 0.1 µA Shutdown Current
l Internal Soft Star
l All AME's Lead Free Products Meet RoHS
Standards
n Applications
l Electronic Information Organizers
l Palmtops
l Cellular and Portable Phones
l Portable Audio Systems
l Various Multi-function Power Supplies
R1 = ^{VOUT − VNFB}
VNFB
+ INFB
R2
D4
V_IN
1.5V~5.5V
L1
10µH
C4
1µF
C2
0.47µF
D3
D2
+15V
5mA
C5
1µF
-15V
5mA
C1
4.7µF
IN
SW
AME5150
EN
NFB
GND
CF
D1 ^15pF
R2
267KΩ
C3
R1 ^4.7µF
24.9KΩ
Figure. 2
± ^{15V Dual output converter}
Rev.A.01
1