BD9853AFV Datasheet, PDF (1/17 Pages) Rohm – Single/Dual-output High-frequency Step-down Switching Regulato (Controller type)

Large Current External FET Controller Type Switching Regulators
Single/Dual-output High-frequency
Step-down Switching Regulator(Controller type)
BD9853AFV
No.09028EAT05
●Description
The BD9853AFV is a 2-ch synchronous DC/DC controller that can operate at a maximum switching frequency of 2MHz,
enabling the use of a smaller external coil than conventional lower-frequency switching regulators. This makes the
BD9853AFV a suitable choice for downsizing applications.
●Features
1) Synchronous Switching Regulator Controller 2channels
2) FET(Pch/Nch) Direct Drive
3) Adjustable Oscillator Frequency with External Resistor (Max. 2MHz)
4) Under Voltage Lockout Function (UVLO)
5) Thermal Shut Down Function (TSD)
6) Short Circuit Protection (SCP)
7) Independent ON/OFF Function in Each Channel with Soft Start Pin
8) SSOP-B16 Package
SSOPB16
●Applications
TVSTB, PC, Portable CD・DVD,DVC etc.
●Absolute Maximum Ratings (Ta = 25℃)
Parameter
Symbol
Limits
Unit
Supply Voltage (VCC-GND)
Vcc
18
V
VREGA-GND Voltage
VREGA
7
V
VCC-VREGB Voltage
VREGB
7
V
Power Dissipation
Pd
562(*1)
mW
Operating Temperature Range
Topr
-40 to +85
℃
Junction Temperature
Tjmax
+150
℃
Storage Temperature Range
Tstg
-55 to +150
℃
* Reduced by 4.49mW for each increase in Ta of 1℃ over 25℃ (When mounted on a board 70×70×1.6tmm grass-epoxy PCB)
●Recommended Operating Conditions
Parameter
Limits
Symbol
Unit
Min.
Typ.
Max.
Supply Voltage
Vcc
4.5
12
16
V
Oscillator Frequency
fosc
100
1000
2000
KHz
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2009.05 - Rev.A