Power LSI series for Digital Camera and Digital Video Camera 4CH Internal Power MOSFET System Switching Regulator BD9866GUL Outline Key specifications BD9866GUL is a 4ch DC/DC converter IC composed of Input voltage range : 4.0V to 14.0V Buck converter 3-channels and Buck-Boost converter Output voltage 1-channel.Including power MOSFET of all channels CH1 reference voltage: 0.6V1.67% (typ.) reduces the number of peripheral devices. Each CH2 reference voltage: 0.8V1.25% (typ.) channel is controlled individually, that enables to reduce CH3 reference voltage: 0.8V1.25% (typ.) power consumption of not working channel. CH4 reference voltage: 0.8V1.25% (typ.) Features Load current 1) Includes Buck converter (CH1, 2 and 4), and CH1 load current: 3.0A(max) Buck-Boost converter (CH3), total 4 channels CH2 load current: 2.0A(max) included. CH3 load current: 1.5A(max) 2) Includes Power MOSFET for all channels. CH4 load current: 3.0A(max) 3) Includes Over Current Protection (OCP) for all Frequency: 1MHz(typ.) channels. 4) Includes Short Circuit Protection (SCP.) 5) Includes Undervoltage Lock Out (UVLO.) Function block diagram 6) Includes Thermal Shut Down (TSD.) 7) Includes Power Good(PG) 8) External synchronous oscillation 9) Each channel can be turn on/off individually. FET Step Down 10) Contains internal compensation for all channels. 1.1V 11) Operation frequency of 1MHz. DC/DC 1 FET Package FET WLCSP(3.75mm3.75mm) Step Down 1.5V Use DC/DC 2 For digital single-lens reflex camera, digital video FET camera. FET FET Buck Boost 5.0V DC/DC 3 FET FET FET Step Down 3.3V DC/DC 4 FET Figure. 1 Function block diagram Product structure:Sillicon monolithic integrated circuit This product is not designed protection against radio active rays www .rohm.com TSZ02201-0B2B0A400010-1-2 2013 ROHM Co., Ltd. All rights reserved. 1/35 17.APR.2013 Rev.001 TSZ2211114 001 DatasheetDatasheet BD9866GUL Pin assignment(Bottom View) G PVCC1 PVCC1 VREGD PVCC GND VCC PVCC4 F Lx1 CH1G INV1 VREGB VREGA RT PVCC4 E Lx1 CH2G SYNC INV3 INV4 Lx4 Lx4 D PGND1 PGND1 CTL2 INV2 RTSS PGND4 PGND4 1pin CPGND2PGND2 CTL1 CTL4 CTL3 SEL POST B Lx2 Lx2 PGND SCP PG Lx32 VO3 A PVCC2 PVCC2 PVCC3 Lx31 PGND3 PGND3 Lx32 12 34567 Figure.2 Pin assignment Pin description PINno Symbol I/O Description Input supply voltage G6 VCC - G4 PVCC - Input supply voltage of internal regulator for driver B3 PGND - Ground terminal G1,G2,A1,A2, Driver input supply voltage terminal. PVCC1,2,3,4 - A3,F7,G7 D1,D2,C1,C2, PGND1,2,3,4 - Ground for internal FET A5,A6,D6,D7 G5 GND - Ground Output terminal of 3.5V regulator for lowside driver G3 VREGD O F5 VREGA O Output terminal of 3.5V regulator for internal reference voltage F4 VREGB O Output terminal of PVCC 3.5V regulator for highside driver B7 Vo3 O Output voltage terminal for CH3 E1,F1,B1,B2, Lx1,2,4 O Inductor connecting terminal E6,E7 CH3 input side inductor connecting terminal A4 Lx31 O A7,B6 Lx32 O CH3 output side inductor connecting terminal F3,D4,E4,E5 INV1,2,3,4 I Error amplifier inverted input terminal External oscillator input terminal E3 SYNC I F6 RT - Oscillator frequency adjustment terminal with external resistor SCP delay time setting terminal with external capacitor B4 SCP - C4,D3,C6,C5 CTL1,2,3,4 I ON/OFF control terminal B5 PG O Power good signal output terminal at SCP CH1,2 power good signal output terminal F2,E2 CH1,2G O D5 RTSS O RT voltage setting terminal CH2,4 mode select terminal C7 SEL I www .rohm.com TSZ02201-0B2B0A400010-1-2 2013 ROHM Co., Ltd. All rights reserved. 2/35 17.APR.2013 Rev.001 TSZ2211115 001