AP1515

150KHz, 1.5A 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 Oct 29, 2004

1/6

Features

- Output voltage: 3.3V 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

- Operating voltage can be up to 22V

- Output load current: 1.5A

- SIP-4L Pb-Free package

- Low power standby mode

- Built-in switching transistor on chip

- Very Low Cost

Applications

- Simple High-efficiency step-down regulator

- On-card switching regulators

- Positive to negative converter

General Description

The AP1515 series are monolithic IC designed for a

step-down DC/DC converter, and own the ability of

driving a 1.5A load without additional transistor

component. 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

below, the switching frequency will be reduced.

The AP1515 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

and an adjustable type. The packages are available

in a standard 4-lead SIP-4L package.

Pin Assignments

1515

12

4

3

1 : V

IN

2 : Output

3 : FB

4 : GND

(Front View)

SIP-4L

Pin Descriptions

Name

Description

Operating voltage input

Output

Switching output

FB

Output voltage feedback control

GND

Ground