BU9006GUZ-E2 ROHM

1/4 Structure Silicon Monolithic Integrated Circuit Function Synchronous Rectifier Step-down DC-DC Converter Product BU9006GUZ Function - Input voltage range 2.5V ~ 4.5V - Output voltage range 0.95 V ~ 4.5V(REF input voltage range 0.5V~VIN) - 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 Absolute Maximum rating (Ta=25c) Item Symbol Rating Unit Maximum input VIN 7 V power supply voltage Power dissipation Pd 0.48(*1) W Operating temperature Topr -35 ~ +85 C range Storage temperature Tstg -55 ~ +125 C range Junction temperature Tjmax +125 C (*1) When mounted on the specified PCB (50 mm x 58 mm ). Deducted by 4.8m W/c when used over Ta=25c. Operating range (Ta=25c) Rating Condit Item Symbol Unit Min. Typ. Max. ion 2.5 - 4.5 V Power supply voltage VIN REV. A 2/4 Electrical characteristics (unless otherwise specified IN=3.6 v , Ta=25 c ) Rating Item Symbol Unit Condition Min. Typ. Max. Switching regulator part Output voltage 1 VOUT1 1.15 1.20 1.25 V REFIN=0.60 V Output voltage 2 VOUT2 1.45 1.50 1.55 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 - 300 500 m NchFET on resistance RonN - 250 450 m Bypass switch part On resistance RBYP - 70 120 m Error Amp part REF input bias current IAMPIN - 0 500 nA Control pin part SHDN pin pull down resistor RSHDN 0.5 1 2 M SHDN pin control Operation VSHDNH 1.4 - VIN V voltage Non operation VSHDNL 0 - 0.4 V HP pin pull down resistor RHP 0.5 1 2 M HP pin control Operation VHPH 1.4 - VIN V Non operation voltage 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