BD9018KV Datasheet, PDF (1/17 Pages) Rohm – Step-down,High-efficiency Switching Regulators (Controller type)

Large Current External FET Controller Type Switching Regulators
Step-down,High-efficiency
Switching Regulators (Controller type)
BD9018KV
No.10028EAT15
●Overview
The BD9018KV is a 2-ch synchronous controller with rectification switching for enhanced power management
efficiency. It supports a wide input range and leads to eco-design (low power consumption) for various electronics.
●Features
1) Wide input voltage range: 3.9V～30V
2) Precision voltage references: 0.8V±1%
3) FET direct drive
4) Rectification switching for increased efficiency
5) Variable frequency: 250k～550kHz (external synchronization to 600kHz)
6) Built-in auto-recovery over-current protection
7) Separate enable-pins per CH for individual power up/down control
8) Supports various applications: step-down, step-up, and step-up-down
9) Small footprint packages: VQFP48C
10) When operating at Max Duty, the switching frequency slows down to 1/5 to reduce input/output difference.
●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
Rating Unit
Parameter
Symbol
VCC Voltage
VCC
35 ^*1
V
PGOOD Voltage
PGOOD
EXTVCC Voltage
EXTVCC
35 ^*1
V
SS1,2 Voltage
SS1,2
VCCCL1,2 Voltage
VCCCL1,2
35 ^*1
V
FB1,2 Voltage
FB1,2
CL1,2 Voltage
CL1,2
35
V
COMP1,2 Voltage
COMP1,2
SW1,2 Voltage
SW1,2
35 ^*1
V
RT Voltage
RT
BOOT1,2 Voltage
BOOT1,2
40 ^*1
V
SYNC Voltage
SYNC
BOOT1,2-SW1,2
BOOT1,2-SW1,2
7 ^*1
V
Voltage
Power Dissipation
Pd
Operating
temperature
Topr
EN1,2 Voltage
EN1,2
EXTVCC
V
Storage temperature
Tstg
VREG5,5A
VREG5,5A
7
V
Junction
temperature
Tj
*1 Regardless of the listed rating, do not exceed Pd in any circumstances.
*2 Mounted on a 70mm x 70mm x 1.6mm glass-epoxy board. Reduce by 8.8mW/℃ (VQFP48C) above 25℃.
Rating
Unit
7
V
VREG5
V
1.1 ^*2
W
-40～+85
℃
-55～+150
℃
+150
℃
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2010.02 - Rev.A