BD95242MUV Datasheet, PDF(1/21 Page) Rohm – 2ch Switching Regurators for Desktop PC

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BD95242MUV Datasheet, PDF (1/21 Pages) Rohm – 2ch Switching Regurators for Desktop PC

Hi-performance Regurator IC Series for PCs

2ch Switching Regurators

for Desktop PC

BD95242MUV

No.09030EBT14

âDescription

BD95242MUV is a switching regulator controller with high output current which can achieve low output voltage (2.0Vï½5.5V)

from a wide input voltage range (7Vï½25V). High efficiency for the switching regulator can be realized by utilizing an external

N-MOSFET power transistor. A new technology called H3RegTM 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, the soft start function,

variable frequency function, short circuit protection function with timer latch, over voltage protection with timer latch, and

Power good function are all built in. This switching regulator is specially designed for Main Power Supply.

âFeatures

1) 2ch H3RegTM Switching Regulator 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 timer-latch (SCP)

4) Soft start function to minimize rush current during startup

5) Switching Frequency Variable (f=200KHzï½500KHz)

6) Power good circuit

7) 2ch Linear regulator

8) VQFN032V5050 package

âApplications

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

âMaximum Absolute Ratings (Ta=25â)

Parameter

Symbol

Limits

VIN, CTL

EXTVCC, PGOOD1, PGOOD2FB1, FB2, Is+1, Is+2, MCTL

30 *1*2

7 *1*2

FS1, FS2, REF1, REF2, SS1, SS2, LG1, LG2

REG1+0.3*1*2

BOOT1, BOOT2

35 *1*2

Terminal voltage

BOOT1-SW1, BOOT2-SW2, HG1-SW1, HG2-SW2

HG1

7 *1*2

BOOT1+0.3 *1*2

HG2

BOOT2+0.3 *1*2

EN1, EN2

6 *1*2

DGND, PGND1, PGND2

AGNDÂ±0.3 *1*2

Power dissipation 1

Power dissipation 2

Power dissipation 3

Power dissipation 4

Pd1

0.38 *3

Pd2

0.88 *4

Pd3

2.06 *5

Pd4

4.56 *6

Operating temperature range

Topr

-10ï½+100

Storage temperature range

Tstg

-55ï½+150

Junction Temperature

Tjmax

+150

*1 Do not however exceed Pd.

*2 Instantaneous surge voltage, back electromotive force and voltage under less than 10% duty cycle.

*3 Reduced by 3.0mW for each increase in Ta of 1â over 25â (when donât mounted on a heat radiation board )

*4 Reduced by 7.0mW for increase in Ta of 1â over 25â. (when mounted on a board 70.0mmÃ70mmÃ1.6mm Glass-epoxy PCB

which has 1 layer. (Copper foil area : 0mm2))

*5 Reduced by 16.5mW for increase in Ta of 1â over 25â. (when mounted on a board 70.0mmÃ70mmÃ1.6mm Glass-epoxy PCB

which has 4 layers. (1st and 4th copper foil area : 20.2mm2, 2nd and 3rd copper foil area : 5505mm2))

*6 Reduced by 36.5mW for increase in Ta of 1â over 25â. (when mounted on a board 70.0mmÃ70mmÃ1.6mm Glass-epoxy PCB

which has 4 layers. (All copper foil area : 5505mm2))

Unit

www.rohm.com

1/20

2009.04 - Rev.B

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