TECHNICAL NOTE

High-performance Regulator IC Series for PCs

Switching Regulators

for DDR-SDRAM Cores

BD9532EKN

●Description

BD9532EKN is a switching regulator controller with high output current which can achieve low output voltage (0.7V to 2.0V)

from a wide input voltage range (4.5V to 25V). High efficiency for the switching regulator can be realized by utilizing an

external N-MOSFET power transistor. A new technology called H

high transient response against load change. SLLM

efficiency in light load mode, providing high efficiency over a wide load range. For protection and ease of use, the soft start

function, variable frequency function, short circuit protection function with timer latch, and REF synchronous function are all

built in. This switching regulator is specially designed for the DDR-SDRAM core.

●Features

1) H

2) Light Load Mode and Continuous Mode Changeable

3) Thermal Shut Down (TSD), Under Voltage LockOut (UVLO), Over Current Protection (OCP),

Short Circuit Protection(SCP) built-in

4) Soft start function to minimize rush current during startup

5) Switching Frequency Variable (f=200KHz～600KHz)

6) HQFN20V Package

●Applications

Laptop PC, Desktop PC, LCD-TV, Digital Components

Sep. 2008