BD9011EKN-E2 Datasheet, PDF (1/29 Pages) Rohm – Dual-output, high voltage, high-efficiency step-down Switching Regulator

TECHNICAL NOTE
Large Current External FET Controller Type Switching Regulator
Dual-output, high voltage,
high-efficiency step-down
Switching Regulator
(Controller type)
BD9011EKN , BD9011KV , BD9775FV
●Overview
The BD9011EKN/KV 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: 3.9V to 30V
2) Precision voltage references: 0.8V±1%
3) FET direct drive
4) Rectification switching for increased efficiency
5) Variable frequency: 250k to 550kHz (external synchronization to 550kHz)
6) Built-in selected OFF latch and 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: HQFN36V, 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
EXTVCC Voltage
EXTVCC
VCCCL1,2 Voltage
VCCCL1,2
Rating
34 ^*1
34 ^*1
Unit
V
V
Parameter
COMP1,2 Voltage
DET1,2 Voltage
Symbol
COMP1,2
DET1,2
Rating
Unit
VREG5
V
CL1,2 Voltage
CL1,2
34
V
RT､SYNC Voltage
RT､SYNC
SW1,2 Voltage
SW1,2
34 ^*1
V
BOOT1,2 Voltage
BOOT1,2
40 ^*1
V
BOOT1,2-SW1,2
Voltage
BOOT1,2-SW1,2
7 ^*1
V
STB, EN1,2 Voltage
STB, EN1,2
VCC
V
Power Dissipation
0.875 ^*2
W
（HQFN36V）
Pd
1.1 ^*2
W
（VQFP48C）
VREG5,5A
VREG5,5A
7
V
Operating
temperature
Topr
-40 to +105
℃
VREG33
VREG33
VREG5
V Storage temperature
Tstg
-55 to +150 ℃
SS1,2､FB1,2
SS1,2､FB1,2 VREG5
V Junction temperature
Tj
+150
℃
*1 Regardless of the listed rating, do not exceed Pd in any circumstances.
*2 Mounted on a 70mm x 70mm x 0.8mm glass-epoxy board. De-rated at 7.44mW/℃（HQFN36V） or 8.8mW/℃（VQFP48C）
above 25℃.
Apr.2008