BD9012KV Datasheet, PDF (1/17 Pages) Rohm – Dual-output, high voltage, high-efficiency step-down switching controller

TECHNICAL NOTE
Large Current External FET Controller Type Switching Regulator
Dual-output, high voltage,
high-efficiency step-down
switching controller
BD9012KV
●Overview
The BD9012KV is a 2-ch synchronous controller with rectification switching for enhanced power management efficiency. It
supports a wide input range, enabling low power consumption ecodesign for an array of electronics.
●Features
1) Wide input voltage range: 4.5V to 30V
2) Precision voltage references: 0.8V±1%
3) FET direct drive
4) Rectification switching for increased efficiency
5) Variable frequency: 250k to 1200kHz (external synchronization to 1200kHz)
6) Built-in selected auto remove over current protection
7) Built-in independent power up/power down sequencing control
8) Make various application , step-down , step-up and step-up-down
9) Small footprint packages: VQFP48C
●Applications
Car audio and navigation systems, CRTTV，LCDTV，PDPTV，STB，DVD，and PC systems，portable CD and DVD players,
etc.
●Absolute Maximum Ratings (Ta=25℃)
Parameter
Symbol
Limits Unit
Parameter
Symbol
VCC Voltage
VCC
34 *1
V
VREG33 Voltage
VREG33
EXTVCC Voltage
EXTVCC
34 *1
V
SS1,2､FB1,2
Voltage
SS1,2､FB1,2
VCCCL1,2 Voltage VCCCL1,2
34
V
COMP1,2 Voltage
COMP1,2
CL1,2 Voltage
CL1,2
34
V
DET1,2 Voltage
DET1,2
SW1,2 Voltage
SW1,2
34 *1
V
RT､SYNC Voltage RT､SYNC
BOOT1,2 Voltage
BOOT1,2
40 *1
V
Power Dissipation
Pd
BOOT1,2-SW1,2
Voltage
BOOT1,2
-SW1,2
7 *1
V
Operating
Temperature Range
Topr
STB, EN1,2 Voltage STB, EN1,2
VCC
V
Storage Temperature
Range
Tstg
VREG5,5A Voltage VREG5,5A
7 *1
V
Maximum Junction
Temperature
Tj
*1 Regardless of the listed rating, do not exceed Pd in any circumstances.
*2 Pd de-rated at 7mW/℃ for temperature above Ta=25℃, Mounted on PCB 70mm×70mm×1.6mm.
Limits
VREG5
1.1 *2
-40 to +105
-55 to +150
+150
Unit
V
W
℃
℃
℃
Apr.2008