AP1519
300KHz, 2A 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 Oct 5, 2004
1/9


„ Features

- Adjustable version output voltage range, 0.8V to
18V+4%
- 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: 2A
- SOP-8L Pb-Free 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







„ General Description

The AP1519 is 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 AP1519 series operates at a
switching frequency of 300KHz thus allows 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 chips are available in a standard
8-lead SOP-8 package.

„ Pin Assignments


Output
FB
SD
GND
GND
GND
GND
1
3
2
4
8
6
7
5
SOP-8L
(Top View)
VIN



„ Pin Descriptions

Name Description
V
IN
Operating voltage input
Output Switching output
GND Ground
FB Output voltage feedback control
SD ON/OFF Shutdown