AP1509 Datasheet, PDF (1/12 Pages) Anachip Corp – 150KHz, 2A PWM Buck DC/DC Converter

AP1509
150KHz, 2A 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: 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)
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 V_FB 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.
Applications
• Simple High-Efficiency Step-Down Regulator
• On-Card Switching Regulators
• Positive to Negative Converter
Ordering Information
AP1509 XX X X X
Output version
Package
Lead Free
Blank : Adjustable
33 : 3.3V
50 : 5.0V
12 : 12V
S: SOP-8L
L: Lead Free
G: Green
Packing
-U : Tube
-13: Taping
Device
AP1509-XXS
Package Packaging
Code (Note 1)
S
SOP-8L
Tube
Quantity
Part Number
Suffix
100
-U
-13” Tape and Reel
Quantity
Part Number
Suffix
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
www.diodes.com
DECEMBER 2006
© Diodes Incorporated