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TSZ02201-0J3J0AJ00140-1-2

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ROHM Co., Ltd. All rights reserved.

10/18

02.MAR.2012 Rev.001

TSZ22111･15･001

BD9132MUV

Datasheet

Information on Advantages

Advantage 1：Offers fast transient response with current mode control system.

Voltage drop due to sudden change in load was reduced by about 50%.

Fig.24 Comparison of transient response

Advantage 2： Offers high efficiency for all load range.

・For lighter load:

Utilizes the current mode control mode called SLLM for lighter load, which reduces various dissipation such as switching

Achieves efficiency improvement for lighter load.

・For heavier load:

Utilizes the synchronous rectifying mode and the low on-resistance MOS FETs incorporated as power transistor.

ON resistance of Highside MOS FET : 82mΩ(Typ.)

ON resistance of Lowside MOS FET : 70mΩ(Typ.)

Achieves efficiency improvement for heavier load.

Offers high efficiency for all load range with the improvements mentioned above.

Advantage 3：・Supplied in smaller package due to small-sized power MOS FET incorporated.

Reduces a mounting area required.

Fig.26 Example application

145mV

62mV

Fig.25 Efficiency

・Output capacitor Co required for current mode control: 22μF ceramic capacitor

・Inductance L required for the operating frequency of 1 MHz: 2.2μH inductor

・Incorporates FET + Boot strap diode

0.001

0.01

0.1

1

0

50

100

①

②

PWM

SLLM

①inprovement by SLLM system

②improvement by synchronous rectifier

Output current Io[A]

Output

PGND

GND

Gm Amp

R

S

Q

OSC

UVLO

TSD

+

VCC

CLK

SLOPE

EN

Current

Comp

Soft

Start

Current

Sense/

Protect

+

Driver

Logic

+

VREF

ITH

ADJ

R1

R2

PVCC

SW

PVCC

BST

VCC

3.3V

Input

SCP

15mm

20mm

Co

L

Rf