AME, Inc.
AME5150
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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.
Figure. 1
1-cell Li-lon to -15V inverting converter
C1
4.7µF
IN
SW
CF
15pF
D1
R2
267KΩ
C3
4.7µF
Micropower Inverting
DC/DC Converter
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Typical Application
V
IN
1.5V~5.5V
L1
10µH
C2
0.47µF
L2
10µH
-15V
AME5150
EN
NFB
GND
R1
24.9KΩ
n
Features
l
1Ω Internal Switch
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Use Small Surface Mount Components
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Adjust Output Voltage up to -28V
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1.5V to 5.5V Input Voltage Range
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Input under Voltage Lockout
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0.1
µA
Shutdown Current
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Internal Soft Star
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All AME's Lead Free Products Meet RoHS
Standards
V
IN
1.5V~5.5V
R
1
=
V
OUT
−
V
NFB
V
NFB
R
2
+
I
NFB
D4
+15V
5mA
C5
1µF
D3
C4
1µF
L1
10µH
C2
0.47µF
D2
-15V
5mA
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Applications
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Electronic Information Organizers
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Palmtops
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Cellular and Portable Phones
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Portable Audio Systems
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Various Multi-function Power Supplies
C1
4.7µF
IN
SW
AME5150
EN
NFB
GND
CF
15pF
D1
R2
267KΩ
C3
4.7µF
R1
24.9KΩ
Figure. 2
±
15V Dual output converter
Rev.A.01
1
AME [ ANALOG MICROELECTRONICS ]
