TECHNICAL NOTE

Large Current External FET Controller Type Switching Regulator

Step-down,

High-efficiency

Switching Regulators

(Controller type)

BD9011EKN , BD9011KV , BD9775FV

■

BD9011EKN, BD9011KV

●

Overview

The BD9011EKN/KV is a 2-ch synchronous controller with rectification switching for enhanced power management efficiency.

It supports a wide input range, enabling low power consumption ecodesign for an array of electronics.

●

Features

1) Wide input voltage range: 3.9V to 30V

2) Precision voltage references: 0.8V±1%

3) FET direct drive

4) Rectification switching for increased efficiency

5) Variable frequency: 250k to 550kHz (external synchronization to 550kHz)

6) Built-in selected OFF latch and auto remove over current protection

7) Built-in independent power up/power down sequencing control

8) Make various application , step-down , step-up and step-up-down

9) Small footprint packages: HQFN36V, VQFP48C

●

Applications

Car audio and navigation systems, CRTTV，LCDTV，PDPTV，STB，DVD，and PC systems，portable CD and DVD players,

etc.

●

Absolute Maximum Ratings (Ta=25℃)

Parameter

Symbol

Rating

Unit

Parameter

Symbol

Rating

Unit

EXTVCC Voltage

EXTVCC

34

*1

V

COMP1,2 Voltage

COMP1,2

VCCCL1,2 Voltage

VCCCL1,2

34

*1

V

DET1,2 Voltage

DET1,2

CL1,2 Voltage

CL1,2

34

V

RT､SYNC Voltage

RT､SYNC

VREG5

V

SW1,2 Voltage

SW1,2

34

*1

V

BOOT1,2 Voltage

BOOT1,2

40

*1

V

0.875

*2

（

HQFN36V）

W

BOOT1,2-SW1,2

Voltage

BOOT1,2-SW1,2

7

*1

V

STB, EN1,2 Voltage

STB, EN1,2

VCC

V

Power Dissipation

Pd

1.1

*2

（

VQFP48C）

W

VREG5,5A

VREG5,5A

7

V

Operating

temperature

Topr

-40 to +105

℃

VREG33

VREG33

VREG5

V

Storage temperature

Tstg

-55 to +150

℃

SS1,2､FB1,2

SS1,2､FB1,2

VREG5

V

Junction temperature

Tj

+150

℃

*1 Regardless of the listed rating, do not exceed Pd in any circumstances.

*2 Mounted on a 70mm x 70mm x 0.8mm glass-epoxy board. De-rated at 7.44mW/℃（

above 25℃.

Sep. 2008