1/5 Rev. A /01-2010
AME5150 Evaluation Board User Guide
1. General Descriptions
The AME5150 is a fixed off time inverting DC/DC converter with integrated N-channel Power MOS. It’s
ideal for LCD panels requiring high efficiency with light load condition as well as LED application for
cellular phone back-lighting, PDAs and other hand-held devices.
2. Features
●
Input voltage: 1.5V to 5.5V
●
Output voltage: Up to -28V
●
Duty ratio: Fixed 400ns T
OFF
PFM Control
●
Oscillation frequency: Various Base on I/O Spec
●
Current Limit and Enable Function
●
Thermal Shutdown Function
●
Input Under Voltage Lockout
●
Small SOT-25 Package
3. Applications
●
Electronic Information Organizers
●
Palmtops
●
Cellular and Portable Phones
●
Portable Audio Systems
●
Various Multi-function Power Supplies
4. Evaluation Board Schematic
(4.1) AME5150 Typical Schematic
EN
EN
IN
GND
SW
NFB
R1
C8
R4
R5
C7
R6
R7
D3
D5
C3
L1
C9
1
5
C1
J1
Vin
ZD1
D1
C4
R2
C5
R8
ZD2
+Vout
C6
C2
D2
IN
GND
3
2
4
-Vout
U1
AME5150
Figure 1
