01W038A 5-channel switching regulator controller BD9731KV Description Dimension (Units : mm) BD9731KV is a PWM switching regulator controller IC. The 5-channel (4 channel for step-up, and 1 channel for step-down) switching regulator controllers are integrated into a VQFP48 package. This IC can operate both Bipolar and MOS transistor. Triangle wave oscillator, reference voltage, PWM comparator, CMOS type driver, and short protection circuit are integrated. 9.0±0.3 7.0±0.2 1.425±0. 1 0. 10 Features 1) Can operate both external transistors of Bipolar and MOS. (Base current can be set by resistance.) 2) Built-in output shutdown circuit (Timer latch) when overloaded. 3) Channel 1, and 5 can externally set the reference voltage. 4) Channel 1, 4, and 5 can control independently ON/OFF. 5) All channels have dead time control. 25 24 48 13 0.4 9.0±0.3 7.0±0.2 36 37 1 12 0.5 0.2±0. 1 0. 15±0. 1 0. 10 VQFP48 Applications Digital still camera, Portable DVD player, W-CDMA, PDA, Digital movie camera Absolute Maximum Ratings (Ta=25˚C) Parameter Maximum applied voltage Power dissipation Limits Symbol –0.3 ~ Vmax Pd Operating temperature range Topr –20 Storage temperature range Tstg –55 Unit +12 400 ∗1 900 ∗2 ~ ~ +85 V mW +125 ˚C ˚C ∗Derating : 4.0mW/˚C for operation above Ta=25˚C (Only IC unit) ∗PCB (70mmx70mm, t=1.6mm) glass epoxy mounting. Derating : 9.0mW/˚C for operation above Ta=25˚C Recommended Operating Conditions (Ta=25˚C) Symbol Min. Typ. Max. Unit Power supply voltage Oscillating frequency Parameter VCC fosc 2.8 100 — — 11 700 V kHz Output current IOUT — — 30 mA May, 2001 Electrical characteristics (Unless otherwise noted; Ta=25˚C, Vcc=6V, fosc=0.20MHz, STB1~5=3V) Parameter Symbol Min. Typ. Max. Unit Circuit current at stand-by Ist — Circuit current at operating Icc — Vref 1.485 VREGA Conditions — 10 µA 4.5 9.5 mA 1.5 1.515 V Iref=–1mA 2.4 2.5 2.6 V Ireg=–1mA Vsc1~5 1.425 1.5 1.575 V VSCP1~5=2V~1V Vtsc 0.90 1.0 1.10 V VSCP=0V~1.5V fosc1 0.179 0.20 0.221 MHz STB1~5=0V <Reference voltage> Output voltage <Internal regulator> Output voltage REGA <Shutdown at overloaded> CH1~5 threshold voltage <Protection circuit> SCP pin detection circuit Triangle wave oscillator Oscillating frequency RT=24kΩ, CT=220pF <Output> Output voltage 'H' at operating VSATH Output voltage 'L' at operating VSATL Maximum output source current IOSOURCE Vcc–0.3 Vcc–0.1 — 0.1 — V Io=10mA 0.3 V Io=–10mA — — 30 mA Iosink — — –30 mA Operating VSTBL 2.0 — — V Non-operating VSTBH –0.3 — 0.3 V Maximum output sink current VREGA SCP 30.GND Block Diagram 33 29 REG D 31 VREGD REG A To-Divers U.V.L.O VREF 34 VOLTAGE REFERENCE To Control Block TIMER LATCH S R Q 3 PVCC1 DTC1 43 FB1 40 INV1 41 NON1 42 SCP1 39 DTC2 38 FB2 36 INV2 35 ERRAMP1 Pch DRIVER PWM 1 RBIAS1 ERRAMP2 Pch DRIVER PWM SCP2 37 SCP3 25 DTC4 19 FB4 21 INV4 22 44 PGND1 8 PVCC2 ERRAMP3 Pch DRIVER PWM 6 RBIAS3 ERRAMP4 Pch DRIVER 9 OUT4 10 RBIAS4 SCPcomp4 14 13 RBIAS5 ERRAMP5 Nch DRIVER 12 OUT5 PWM SCP5 15 SCPcomp5 11 PGND2 TRIANGLE FORM OSC 27 28 48 47 46 45 STB1 ON/OFF LOGIC CT OSC BUFFER STB5 18 STB4 16 17 STB23 DTC5 FB5 INV5 NON5 7 OUT3 SCPcomp3 PWM SCP4 20 4 OUT2 5 RBIAS2 SCPcomp2 DTC3 26 FB3 24 INV3 23 2 OUT1 SCPcomp1 RT STB pin control voltage 32.VCC <STB1~5> BD9731KV