R1280D002X Datasheet, PDF (4/26 Pages) RICOH electronics devices division – 2CH PWM DC/DC Controller

q R1280D002B
Pin No.
1
2
3
4
5
6
7
8
9
10
Symbol
EXT1
GND
CE
DTC1
VFB1
VFB2
DTC2
Vrefout
VIN
EXT2
Description
External Transistor of Channel 1 Drive Pin (CMOS Output)
Ground Pin
Chip Enable Pin
Maximum Duty Cycle of Channel 1 Setting Pin
Feedback pin of Channel 1
Feedback pin of Channel 2
Maximum Duty Cycle of Channel 2 Setting Pin
Reference Output Pin
Voltage Supply Pin of the IC
External Transistor of Channel 2 Drive Pin (CMOS Output)
s ABSOLUTE MAXIMUM RATINGS
q R1280D002A/C
Symbol
VIN
VEXT1,2
VAMPOUT1
VDTC1,2
Vrefout
VFB1,2
IEXT1,2
PD
Topt
Tstg
Item
VIN Pin Voltage
VEXT1,2 Pin Output Voltage
AMPOUT1 Pin Voltage
DTC1,2 Pin Voltage
VREFOUT Pin Voltage
VFB1,VFB2 Pin Voltage
EXT1,2 Pin Output Current
Power Dissipation
Operating Temperature Range
Storage Temperature Range
q R1280D002B
Symbol
VIN
VEXT1,2
VCE
VDTC1,2
Vrefout
VFB1,2
IEXT1,2
PD
Topt
Tstg
Item
VIN Pin Voltage
VEXT1,2 Pin Output Voltage
CE Pin Voltage
DTC1,2 Pin Voltage
VREFOUT Pin Voltage
VFB1,VFB2 Pin Voltage
EXT1,2 Pin Output Current
Power Dissipation
Operating Temperature Range
Storage Temperature Range
Rating
Unit
6.5
V
-0.3∼VIN+0.3
V
-0.3∼VIN+0.3
V
-0.3∼VIN+0.3
V
-0.3∼VIN+0.3
V
-0.3∼VIN+0.3
V
±50
mA
250
mW
-40 to +85
°C
-55 to +125
°C
Rating
Unit
6.5
V
-0.3∼VIN+0.3
V
-0.3∼VIN+0.3
V
-0.3∼VIN+0.3
V
-0.3∼VIN+0.3
V
-0.3∼VIN+0.3
V
±50
mA
250
mW
-40 to +85
°C
-55 to +125
°C
Rev.1.10
-4-