AP1520 Datasheet, PDF (1/8 Pages) Anachip Corp – PWM Control 2A Step-Down Converter

AP1520
PWM CONTROL 2A STEP-DOWN CONVERTER
Features
• Input Voltage: 3.6V to 23V
• Output Voltage: 0.8V to V_CC
• Duty Ratio: 0% to 100% PWM Control
• Oscillation Frequency: 300KHz typ.
• Soft-Start, Current Limit, Enable Function
• Thermal Shutdown Function
• Built-in Internal SW P-Channel MOS
• SOP-8L Pb-Free Package
• Lead Free Finish/RoHS Compliant (Note 1)
General Description
AP1520 consists of step-down switching regulator with PWM control.
These devices include a reference voltage source, oscillation circuit,
error amplifier, and internal PMOS.
AP1520 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 100%. This converter also contains
an error amplifier circuit as well as a soft-start circuit that prevents
overshooting at startup. 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 300KHz to 30KHz. Also, an internal compensation
block is built in to minimum external component count.
With the addition of an internal P-channel Power MOS, a coil,
capacitors, and a diode connected externally, these ICs can function
as step-down switching regulators. They serve as ideal power
supply units for portable devices when coupled with the SOP–8L
mini-package, providing such outstanding features as low current
consumption. Since this converter can accommodate an input
voltage up to 23V, it is also suitable for the operation via an AC
adapter.
Applications
• PC Motherboard
• LCD Monitor
• Graphic Card
• DVD-Video Player
• Telecom Equipment
• ADSL Modem
• Printer and other Peripheral Equipment
• Microprocessor Core Supply
• Networking Power Supply
Ordering Information
AP 1520 X X X
Package
S : SOP-8L
Lead-Free
L : Lead- Free
Packing
-U : Tube
-13 : Taping
Note: 1. RoHS revision 13.2.2003. Glass and High Temperature Solder Exemptions Applied, see EU Directive Annex Notes 5 and 7.
Device
(Note 2)
Package
Code
Packaging
Tube
Quantity
Part Number
Suffix
AP1520S
S
SOP-8L
100/Tube
-U
Lead-free
13” Tape and Reel
Quantity
Part Number
Suffix
2500/Tape & Reel
-13
Note: 2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at
http://www.diodes.com/datasheets/ap02001.pdf.
AP1520 Rev. 1
1 of 8
www.diodes.com
JANUARY 2007
© Diodes Incorporated