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AP1503 Fiches technique(PDF) 1 Page - Anachip Corp

No de pièce AP1503
Description  300Khz, 2.5A PWM Buck DC/DC Converter
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AP1503 Fiches technique(HTML) 1 Page - Anachip Corp

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AP1503
300Khz, 2.5A PWM Buck DC/DC Converter
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 1.0 Sep. 29, 2004
1/5
Features
- Output voltage: 3.3V
- 300KHz +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: 2.5A
- SOP-7L 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
- DSL Modems
- Portable Computers
- Regulated Wall Adapters
- Distributed Power
General Description
The AP1503 series are monolithic ICs designed for
step-down DC/DC converters, and own the ability
of driving a 2.5A load without additional transistor
components. 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 external compensation makes feedback
control have good line and load regulation.
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. The AP1503 series operates at a
switching frequency of 300KHz thus allowing
smaller sized filter components than what would be
needed with lower frequency switching regulators.
Other features include a guaranteed +2% 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. The packages are available in a standard
SOP-7 lead package.
Pin Assignment
SOP7 with Heat Sink
VB
VIN
COMP
SD
FB
GND
VO
7
6
5
2
3
4
1
Pin Descriptions
Name
Description
VIN
Operating voltage input
VB
Boost pin
SD
ON/OFF Shutdown
FB
Output voltage feedback control
COMP
Compensation pin
GND
Ground
VO
Switching output


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