AP1510
PWM CONTROL 3A STEP-DOWN CONVERTER
General Description
Features
AP1510 consists of step-down switching regulator with PWM
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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
SOP-8L Pb-Free Package
control. These devices include
a reference voltage source,
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oscillation circuit, error amplifier and internal PMOS.
AP1510 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,
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.
SOP-8L: Available in “Green” Molding Compound
(No Br, Sb)
Lead Free Finish/ RoHS Compliant (Note 1)
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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 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
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Cellular Phones
PC Motherboard
LCD Monitor
Graphic Card
DVD-Video Player
Telecom Equipment
ADSL Modem
Printer and other Peripheral Equipment
Microprocessor core supply
Networking power supply
Typical Application Circuit
VOUT=5V/3A
L1
Vcc
VIN
Output
22uH
CC
Optional
RA
6.8K
ROCSET COCSET
3.9K
AP1510
Option
+
-
+
FB
CIN
OCSET
EN
C
COUT
0.1uF 470uF
470uF
VSS
-
REN
RB
1.3K
CVcc
0.1uF
D1
100K
CEN
0.1uF
Note: VOUT = VFB x (1+RA/RB)
RB=0.7K~5K ohm
AP1510 Rev. 7
DS31018
1 of 9
www.diodes.com
JULY 2009
© Diodes Incorporated