ROHM BU9006GUZ Technical data

1/4

Structure Silicon Monolithic Integrated Circuit

Function Synchronous Rectifier Step-down DC-DC Converter

Product
Function - Input voltage range 2.5V ~ 4.5V

- Output voltage range 0.95 V ~ 4.5V(REF input voltage range 0.5V~VIN)

Absolute Maximum rating (Ta=25c)

(*1) When mounted on the specified PCB (50 mm x 58 mm ). Deducted by 4.8m W/c when used over Ta=25c.

BU9006GUZ

- Current mode control

- Integrated output FET synchronous rectifier step-down DC-DC converter

- Switching frequency 2.0MHz typ.

- Maximum output current 750mA (Switching regulator part)

- Maximum output current 1200mA (Bypass switch part)

- PchFET on resistance at bypass mode: (70mohm) typ.

- 1.6mm x 1.6mm, t=0.4mm MAX, WLCSP

Item Symbol Rating Unit

Maximum input

power supply voltage
Power dissipation Pd 0.48(*1) W
Operating temperature

range

Storage temperature

range

Junction temperature Tjmax +125 C

VIN 7 V

Topr -35 ~ +85 C

Tstg -55 ~ +125 C

Operating range (Ta=25c)

Item Symbol

Power supply voltage

VIN

Rating

Min. Typ. Max.

2.5 - 4.5 V

Unit

Condit

ion

REV. A

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Electrical characteristics

(unless otherwise specified IN=3.6[v], Ta=25[c])

Item Symbol

Min. Typ. Max.

Rating

Unit Condition

[Switching regulator part]
Output voltage 1

Output voltage 2

VOUT1 1.15 1.20 1.25
VOUT2 1.45 1.50 1.55

V REFIN=0.60 V

V REFIN=0.75 V
[Soft start part]
Soft start time Tss -

40 70

usec

[Oscillator circuit]
Switching frequency fosc 1.5 2.0 2.5 MHz
[Driver part]

PchFET on resistance RonP
NchFET on resistance RonN

- 300 500 mΩ

- 250 450 mΩ

[Bypass switch part]
On resistance RBYP - 70 120 mΩ

[Error Amp part]
REF input bias current IAMPIN - 0 500 nA

[Control pin part]
SHDN pin pull down resistor RSHDN 0.5 1 2 MΩ

SHDN pin control

voltage

Operation VSHDNH 1.4 - VIN V

Non operation

VSHDNL 0 - 0.4 V

HP pin pull down resistor RHP 0.5 1 2 MΩ

HP pin control

voltage

Operation VHPH 1.4 - VIN V

Non operation

VHPL 0 - 0.4 V

【UVLO】
Release voltage threshold Uvth 1.95 2.2 2.45 V

Hysteresis Uvhy 70 90 110 mV
[Circuit current]

Circuit current at shutdown IIN - 0 10 uA SHDN=0V
* No design for durability against radiation

REV. A