AP5004
PWM CONTROL 2.5A STEP-DOWN CONVERTER
AP5004
Document number: DS31444 Rev. 5 - 2
1 of 11
www.diodes.com
August 2010
© Diodes Incorporated
Description
The AP5004 is a step-down switching regulator with PWM
control and includes a reference voltage source, oscillation
circuit, error amplifier, and an internal NMOS.
AP5004 provides low-ripple power, high efficiency, and
excellent transient characteristics. The PWM control circuit is
able to vary the duty ratio linearly from 0% up to 90%. An
enable function, an over-current protect function, and a short
circuit protect function are built inside, and when OCP or SCP
happens, the operation frequency will be reduced from
300 KHz to 50 KHz. Also, an internal compensation block has
been designed in to minimize the external component count.
With built-in power NMOS, a step-down switching regulator
can easily be built by adding a coil, capacitors, and a diode.
The combination of high efficiency, low standby current, high
input voltage (32V), and high output current (2.5A)in a small
SOP-8L package gives the AP5004 an unprecedented
advantage in any high power system applications.
Features
• Input Voltage: 10V to 32V
• Adjustable Output Voltage from 0.8V to 6V
• Duty Ratio: 0% to 90% PWM control
• Oscillation Frequency: 300KHz typical
• Short Circuit Protect Frequency:50 KHz
• 2uA Maximum Standby Current
• Current Limit, Enable Function
• Thermal Shutdown Function
• Built-in Internal SW N-channel MOS
• SOP-8L: Available in “Green” Molding Compound
(No Br, Sb)
• Lead Free Finish/ RoHS Compliant (Note 1)
Pin Assignments
AP5004
1
2
3
7
6
54
8
(Top View )
GND
GND
Vcc
Vcc
EN
FB
Vboost
Output
SOP-8L
Applications
• Microprocessor Core Supply
• Networking Power Supply
• LCD MNT, TV Power Supply
• Telecom Power Supply
Notes: 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.
