AP1509
150KHz, 2A PWM BUCK DC/DC CONVERTER
General Description
Features
The AP1509 series are monolithic IC designed for a step-down
DC/DC converter, and own the ability of driving a 2A load without
additional transistor. It saves board space. The external
shutdown function can be controlled by logic level and then come
into standby mode. The internal compensation makes feedback
control having good line and load regulation without external
design. Regarding protected function, thermal shutdown is to
prevent over temperature operating from damage, and current
limit is against over current operating of the output switch. If
current limit function occurs and VFB is down below 0.5V, the
switching frequency will be reduced. The AP1509 series operates
at a switching frequency of 150KHz thus allow 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 fixed 3.3V, 5V, 12V, and an
adjustable type. The chips are available in a standard 8-lead
SOP-8 package.
•
•
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: 2A
•
•
•
•
•
•
•
•
•
•
SOP-8L Packages
Low Power Standby Mode
Built-in Switching Transistor On Chip
SOP-8L: Available in “Green” Molding Compound (No
Br, Sb)
Lead Free Finish/RoHS Compliant for Lead Free and
“Green” products (Note 1)
•
Applications
•
•
•
Simple High-Efficiency Step-Down Regulator
On-Card Switching Regulators
Positive to Negative Converter
Ordering Information
XX X X X
AP1509
Package
Packing
Output version
Lead Free
L: Lead Free
G: Green
Blank: Adjustable S: SOP-8L
33 : 3.3V
50 : 5.0V
-U : Tube
-13: Taping
12 : 12V
Tube
-13” Tape and Reel
Package Packaging
Device
Part Number
Part Number
Code
(Note 1)
Quantity
Quantity
Suffix
Suffix
AP1509-XXS
S
SOP-8L
100
-U
2500/Tape & Reel
-13
Note: 1. 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.
AP1509 Rev. 1
1 of 12
DECEMBER 2006
www.diodes.com
© Diodes Incorporated