AP5100
1.2A Step-Down Converter with 1.4MHz Switching
Frequency
Features
•
•
•
•
•
•
•
•
•
•
•
•
V
IN
4.75V to 24V
Load current of up to 1.2A
Internal Power MOSFET
Stable with Low ESR Ceramic Output Capacitors
Up to 90% Efficiency
0.1µA Shutdown Mode
Fixed 1.4MHz Frequency
Thermal Shutdown
Cycle-by-Cycle Over Current Protection
Resistor divider adjustable Output: 0.81V to 15V
SOT26: Available in “Green” Molding Compound
(no Br, Sb)
Lead Free Finish/RoHS Compliant (Note 1)
General Description
The AP5100 is a current mode step-down converter with a built-in
power MOSFET to enable smallest solution size power
conversion.
With the low series resistance power switch it enables a constant
output current of up to 1.2A over a wide input supply range. The
load and line regulation has excellent response time over the
operating input voltage and temperature range.
The AP5100 is self protected, through a cycle-by-cycle current
limiting algorithm and an on chip thermal protection.
The AP5100 will provide the voltage conversion with a low count
of widely available standard external components.
The AP5100 is available in SOT26 package.
Applications
•
•
•
•
Distributed Power Systems
Battery Charger
Pre-Regulator for Linear Regulators
WLED Drivers
Typical Applications
V
IN
C1
5
IN
BST 1
C3
.1
L
V
OUT
D1
R1
C6
C2
R2
FB
3
AP5100
ON
OFF
4
EN
SW
6
GND
Figure 1. Typical Application Circuit
AP5100
Document number: DS32130 Rev. 1 - 2
1 of 12
MARCH 2010
©
Diodes Incorporated
DIODES [ DIODES INCORPORATED ]
