PART OBSOLETE – NO ALTERNATE
PART
AP1520
PWM CONTROL 2A STEP-DOWN CONVERTER
Description
Pin Assignments
OBSOLETE – PART DISCONTINUED
AP1520 consists of step-down switching regulator with PWM control
These devices include a reference voltage source, oscillation circuit
error amplifier and internal PMOS.
(Top View)
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. An enable function, an over current protection
and a short circuit protection 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 SO-8 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.
Features
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Input Voltage: 3.6V to 23V
Output Voltage: 0.8V to VCC
Duty Ratio: 0% to 100% PWM Control
Oscillation Frequency: 300kHz Typ
Current Limit, Enable Function
Thermal Shutdown Function
Built-in Internal SW P-channel MOS
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free.“Green” Device (Note 3)
Notes:
1.
2.
3.
8
Vss
7
Vss
OCSET 3
6
Output
VCC 4
5
Output
FB 1
EN 2
AP1520
SO-8
Applications
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PC Motherboard
LCD Monitor
Graphic Card
DVD-Video Player
Telecom Equipment
ADSL Modem
Printer and Other Peripheral Equipment
Microprocessor Core Supply
Networking Power Supply
No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.
See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and
Lead-free.
Halogen- and Antimony-free "Green” products are defined as those which contain
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