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Anachip

AP1507 Datasheet Preview

AP1507 Datasheet

3A PWM Buck DC/DC Converter

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150KHz, 3A PWM Buck DC/DC Converter
AP1507
„ Features
- 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
- TO252-5L packages
- Low power standby mode
- Built-in switching transistor on chip
„ Applications
- Simple High-efficiency step-down regulator
- On-card switching regulators
- Positive to negative converter
„ Pin Assignments
„ General Description
The AP1507 series are monolithic IC designed for a
step-down DC/DC converter, and own the ability of
driving a 3A load without external transistor. Due to
reducing the number of external component, 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 feedback control have 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 occurred
and VFB 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 fixed 3.3V, 5V, 12V, and an adjustable
type. The package is available in a 5-lead TO-252.
„ Pin Descriptions
( Top View )
Metal Tab GND
TO252-5L
5 SD
4 FB
3 Gnd
2 Output
1 VIN
Name
VIN
Output
GND
FB
SD
Description
Operating voltage input
Switching output
Ground
Output voltage feedback control
ON /OFF Shutdown
This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of
this product. No rights under any patent accompany the sale of the product.
Rev.1.1 Oct 29, 2004
1/9




Anachip

AP1507 Datasheet Preview

AP1507 Datasheet

3A PWM Buck DC/DC Converter

No Preview Available !

150KHz, 3A PWM Buck DC/DC Converter
AP1507
„ Ordering Information
AP1507 XX X X X
Output version
Package
Lead Free
Packing
Blank : Adjustable
-33 : 3.3V
-50 : 5.0V
-12 : 12V
D5: TO252-5L Blank : Normal
Blank : Tube
L : Lead Free Package A : Taping
„ Block Diagram
SD
Current
Source
bias
1.235V
Reference
2.5V
Regulator
Start
up
200mV
220mV
+
Com_p
VIN
Comp
+
+ Frequecy
FB
_Amp
compen-
sation
Comp
+
Pre-driver
3A
Switch
150kHz
OSC.
Thermal
Shutdown
Output
Gnd
Anachip Corp.
www.anachip.com.tw
Rev.1.1 Oct 29, 2004
2/9


Part Number AP1507
Description 3A PWM Buck DC/DC Converter
Maker Anachip
Total Page 9 Pages
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