Diodes AP5101 Manuel d'utilisateur

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AP5101
1.5A Step-Down Converter with 1.4MHz Switching
Frequency
AP5101
Document number: DS32258 Rev. 1 - 2
1 of 15
www.diodes.com
July 2010
© Diodes Incorporated
NEW PRODUCT
Description
The AP5101 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 1.5A over a wide input supply
range. The load and line regulation has excellent response
time over the operating input voltage and temperature range.
The AP5101 is self protected, through a cycle-by-cycle
current limiting algorithm and an on chip thermal protection.
The AP5101 will provide the voltage conversion with a low
count of widely available standard external components.
The AP5101 is available in SO-8 package.
Pin Assignments
SO-8
( Top View )
1
2
3
4
8
7
6
5
GND
BST
FB
COMP
SW
GND
EN
IN
Features
• V
IN
4.75 to 22V
1.5A Peak Output Current
Stable with Low ESR Ceramic Output Capacitors
• External compensation
Up to 92% Efficiency
0.1µA Shutdown Mode
• Fixed 1.4MHz Frequency
• Thermal Shutdown
Cycle-by-Cycle Over Current Protection
Output Adjustable from 0.81V to 15V
SO-8: Available in “Green” Molding Compound
(No Br, Sb)
Lead Free Finish/ RoHS Compliant (Note 1)
Applications
Distributed Power Systems
• Battery Charger
Pre-Regulator for Linear Regulators
• WLED Driver
Note: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at
http://www.diodes.com/products/lead_free.html.
Typical Application Circuit
1
7
2
6
4,8
5
3
IN
EN
GND
COMP
FB
SW
BST
AP5101
Output
3.3V 1.5A
C2
C3
R3
R2
C4
L1
Input
4.75V to 22V
R1
C1
ON
OFF
D1
Figure 1 Typical Application Circuit
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Résumé du contenu

Page 1 - © Diodes Incorporated

AP51011.5A Step-Down Converter with 1.4MHz Switching Frequency AP5101 Document number: DS32258 Rev. 1 - 2 1 of 15 www.diodes.com July 2010 © Diode

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