AP1501
150KHz, 3A PWM BUCK DC/DC CONVERTER
General Description
Features
The AP1501 is a fully integrated step-down DC/DC converter,
Output voltage: 3.3V, 5V, 12V and adjustable output
with the ability to drive 3A load without the need of additional
version
driver components. The AP1501 operates at a switching
Adjustable version output voltage range, 1.23V to
frequency of 150KHZ enabling the use of small size filter
37V+4%
components. As a result, board space is reduced and BOM costs
150KHZ +15% fixed switching frequency
are lowered.
Voltage mode non-synchronous PWM control
Thermal-shutdown and current-limit protection
The AP1501 has integrated the shutdown function that allows
ON/OFF shutdown control input
standby mode to be activated via an external logic signal input.
Operating voltage can be up to 40V
The internal compensation facilitates feedback control for line
Output load current: 3A
and load regulation without the need of an external circuitry. The
Low power standby mode
AP1501 has a built-in Thermal shutdown and Current Limit
Built-in switching transistor on chip
function to prevent damage from high operating temperature and
Lead Free packages: TO263-5L and TO220-5L(R)
high current operating to the output switch.
TO263-5L and TO220-5L(R): Available in Green
Molding Compound (No Br, Sb)
Additional features include a guaranteed +/- 4% tolerance on the
Lead Free Finish/RoHS Compliant (Note 1)
output voltage under specified input and output load conditions,
and +/- 15% on oscillator frequency. The AP1501 offers both
fixed and a Adjustable output voltages. For fixed outputs the
AP1501 supports 3.3V, 5.0V and 12V. The package options
available are standard 5-lead TO263 and TO220(R) packages.
Applications
Simple High-efficiency step-down regulator
On-card switching regulators
Positive to negative converter
Ordering Information
AP1501 - XX XXX X - X
Output version Package Lead Free Packing
K5 : TO263-5L L : Lead Free U : Tube
Blank : Adjustable
33 : 3.3V T5 : TO220-5L G : Green 13 : Tape & Reel
T5R : TO220-5L(R)
50 : 5.0V
12 : 12V
Tube 13 Tape and Reel
Package Packaging
Device Quantity Part Number Quantity Part Number
Code (Note 2)
Suffix Suffix
Lead-free
AP1501-XXK5L-U K5 TO263-5L 50 -U NA NA
Lead-freeAP1501-XXK5L-13 K5 TO263-5L NA NA 800/Tape & Reel -13
AP1501-XXK5G-U K5 TO263-5L 50 -U NA NA
AP1501-XXK5G-13 K5 TO263-5L NA NA 800/Tape & Reel -13
AP1501-XXT5L-U T5 TO220-5L 50 -U NA NA
Lead-free
AP1501-XXT5G-U T5 TO220-5L 50 -U NA NA
AP1501-XXT5RL-U T5R TO220-5L(R) 50 -U NA NA
Lead-free
AP1501-XXT5RG-U T5R TO220-5L(R) 50 -U NA NA
Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied, see EU Directive 2002/95/EC Annex Notes.
2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at
AP1501
150KHz, 3A PWM BUCK DC/DC CONVERTER
Pin Assignments
( Top View )
( Top View )
5 SD
5 SD
4 FB
4 FB
3 Gnd
3 Gnd
2 Output
2 Output
1 V
IN
1 V
IN
Metal Tab GND
TO220-5L/TO220-5L(R)
TO263-5L
Pin Descriptions
Name Description
V Operating voltage input
IN
Output Switching output
Gnd Ground
FB Output voltage feedback control
SD ON/OFF shutdown
AP1501 Rev. 11 2 of 12 JANUARY 2009
www.diodes.com Diodes Incorporated