BD9P105MUF-CE2 datasheet(8/60 Pages) ROHM

No de pièce	BD9P105MUF-CE2

Description	3.5 V to 40 V Input, 1 A Single 2.2 MHz Buck DC/DC Converter For Automotive

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Fabricant	ROHM [Rohm]

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28.Apr.2020 Rev.001

www.rohm.com

TSZ22111 • 15 • 001

BD9P1x5MUF-C Series

TSZ02201-0J1J0AL01500-1-2

Description of Blocks - continued

-

PWM Comp

This block compares the output voltage of the GmAmp2 (Vc) and the saw tooth waveform (Vr) to control the switching

duty.

-

Ramp

This block generates the saw tooth waveform (Vr) from the clock signal generated by OSC.

-

Control Logic

This block controls switching operation and protection functions.

-

Driver

This circuit drives the gates of the output FETs.

-

Sleep Comp

If output/feedback voltage becomes 101.3 % (Typ) or more, this block puts the device into SLEEP state. This state is

released when output/feedback voltage becomes 101.0 % (Typ) or less.

-

ZX Comp

This block stops the switching by detecting reverse current of the SW current at LLM control.

-

HOCP Comp

This block detects the current flowing through the High Side FET and limits the current of 2.2 A (Min) or more. This

function works in abnormal situation such as the SW pin shorted to GND condition in order to prevent the High Side FET

from destruction.

-

Reset

When the output voltage reaches -4.7 % (Typ) or more of the normal regulation voltage, the open drain MOSFET

connected to the RESET pin turns off in 3.6 ms (Typ) and the output of the RESET pin becomes high by its external

pull-up resistor.

When the output voltage reaches -7.2 % (Typ) or less, the RESET pin open drain MOSFET turns on and the RESET pin

is pulled down with an impedance of 190 Ω (Typ).

-

Discharge

This block discharges the output voltage during EN is low and before VOUT start up. The VOUT_DIS pin is pulled down

with an impedance of 75 Ω (Typ).

Numéro de pièce similaire - BD9P105MUF-CE2

Fabricant	No de pièce	Fiches technique	Description
Rohm	BD9P105MUF-CE2	2Mb / 60P	3.5 V to 40 V Input, 1 A Single 2.2 MHz Buck DC/DC Converter For Automotive 28.Apr.2020 Rev.001

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