● Description

BD9528MUV is a 2ch switching regulator controller with high output current which can achieve low output voltage (1.0V～5.5V) from a wide input voltage range (5.5V～ 28V). High efficiency for the switching regulator can be realized by utilizing an external N-MOSFET power transistor. A new technology called H3RegTM(High speed, High efficiency, High performance) is a Rohm proprietary control method to realize ultra high transient response against load change. SLLM (Simple Light Load Mode) technology is also integrated to improve efficiency in light load mode, providing high efficiency over a wide load range. For protection and ease of use, 2ch LDO (5V/100mA, 3.3V/100mA), the soft start function, variable frequency function, short circuit protection function with timer latch, over voltage protection, and Power good function are all built in. This switching regulator is specially designed for Main Power Supply of laptop PC.

● Features

1) 2ch H3REGTM DC/DC Converter controller

2) Adjustable Simple Light Load Mode (SLLM), Quiet Light Load Mode (QLLM) and Forced continuous Mode

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

Over Voltage Protection (OVP), Short circuit protection with 0.75ms timer-latch (SCP)

4) Soft start function to minimize rush current during startup

5) Switching Frequency Variable (f=200kHz～ 500kHz)

6) Built-in Power good circuit

7) Built-in 2ch Linear regulator (5V/100mA,3.3V/100mA)

8) Built in reference voltage(0.7V)

9) VQFN032V5050 package

10) Built-in BOOT-Di

11) Built-in output discharge

● Applications

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