AP1501
150KHz, 3A PWM BUCK DC/DC CONVERTER
AP1501 Rev. 11 1 of 12 JANUARY 2009
www.diodes.com © Diodes Incorporated
Lead-free
Lead-free
Lead-free
Lead-free
• Output voltage: 3.3V, 5V, 12V and adjustable output
version
• Adjustable version output voltage range, 1.23V to
37V+
4%
• 150KHZ +
15% fixed switching frequency
• Voltage mode non-synchronous PWM control
• Thermal-shutdown and current-limit protection
• ON/OFF shutdown control input
• Operating voltage can be up to 40V
• Output load current: 3A
• Low power standby mode
• Built-in switching transistor on chip
• Lead Free packages: TO263-5L and TO220-5L(R)
• TO263-5L and TO220-5L(R): Available in “Green”
Molding Compound (No Br, Sb)
• Lead Free Finish/RoHS Compliant (Note 1)
The AP1501 is a fully integrated step-down DC/DC converter,
with the ability to drive 3A load without the need of additional
driver components. The AP1501 operates at a switching
frequency of 150KHZ enabling the use of small size filter
components. As a result, board space is reduced and BOM costs
are lowered.
The AP1501 has integrated the shutdown function that allows
standby mode to be activated via an external logic signal input.
The internal compensation facilitates feedback control for line
and load regulation without the need of an external circuitry. The
AP1501 has a built-in Thermal shutdown and Current Limit
function to prevent damage from high operating temperature and
high current operating to the output switch.
Additional features include a guaranteed +/- 4% tolerance on the
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.
• Simple High-efficiency step-down regulator
• On-card switching regulators
• Positive to negative converter
Ordering Information
Package
K5 : TO263-5L
Output version
AP1501 - XX
XXX X - X
Packing
U : Tube
13 : Tape & Reel
Blank : Adjustable
33 : 3.3V
50 : 5.0V
12 : 12V
Lead Free
L : Lead Free
T5 : TO220-5L
T5R : TO220-5L(R)
G : Green
Device
Package
Code
Packaging
(Note 2)
Tube 13” Tape and Reel
Quantity Part Number
Suffix
Quantity Part Number
Suffix
AP1501-XXK5L-U K5 TO263-5L 50 -U NA NA
AP1501-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
AP1501-XXT5G-U T5 TO220-5L 50 -U NA NA
AP1501-XXT5RL-U T5R TO220-5L(R) 50 -U NA NA
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
http://www.diodes.com/datasheets/ap02001.pdf.
.
Features
General Description
Applications
