AP1507_08 Datasheet, PDF (1/11 Pages) Diodes Incorporated – 150KHz, 3A PWM BUCK DC/DC CONVERTER

AP1507
150KHz, 3A PWM BUCK DC/DC CONVERTER
Features
General Description
• Output Voltage: 3.3V, 5V, 12V and Adjustable Output
Version
• Adjustable Version Output Voltage Range, 1.23V to
18V+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 22V
• Output Load Current: 3A
• Lead Free Package: TO252-5L
• Low Power Standby Mode
• Built-in Switching Transistor On Chip
• Lead Free Package: TO252-5L
• Lead Free Finish/ RoHS Compliant (Note 1)
The AP1507 is a monolithic IC designed for a step-down DC/DC
converter and is capable of driving a 3A load without an external
transistor. Due to reducing the number of external components,
the board space can be saved easily. The external shutdown
function can be controlled by logic level and then come into
standby mode. The internal compensation makes the feedback
control have good line and load regulation without an external
design. Regarding the protected function, the thermal shutdown
is to prevent over temperature operating from damaging the
device, and current limit is against over current operating of the
output switch. If the current limit function occurred and V_FB is
down to 0.5V below, the switching frequency will be reduced. The
AP1507 series operates at a switching frequency of 150KHz thus
allowing smaller sized filter components than what would be
needed with lower frequency switching regulators. Other features
include a guaranteed +4% tolerance on output voltage under
specified input voltage and output load conditions, and +15% on
the oscillator frequency. The output version included a fixed 3.3V,
5V, 12V, and an adjustable type. AP1507 is available in a 5-lead
TO-252 lead-free package.
Applications
• Simple High-Efficiency Step-Down Regulator
• On-Card Switching Regulators
• Positive to Negative Converter
Ordering Information
AP1507 - XX XX X X
Output Version
Blank : Adjustable
33 : 3.3V
50 : 5.0V
12 : 12V
Package
D5 : TO252-5L
Lead Free
L : Lead Free
Packing
-U : Tube
-13 : Tape & Reel
Device
Package
Code
Packaging
(Note 2)
Tube/Bulk
Quantity
Part Number
Suffix
13” Tape and Reel
Quantity
Part Number
Suffix
AP1507-XXD5
D5
TO252-5L
80
-U
2500/Tape & Reel
-13
Lead-free
Notes:
1. RoHS revision 13.2.2003. Glass and high temperature solder exemptions applied, see EU Directive Annex Notes 5 and 7.
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.
AP1507 Rev. 2
1 of 11
www.diodes.com
FEBRUARY 2008
© Diodes Incorporated