R1280D002X Datasheet, PDF (6/26 Pages) RICOH electronics devices division – 2CH PWM DC/DC Controller

q R1280D002B
Symbol
Item
VIN Operating Input Voltage
VREFOUT VREFOUT Voltage Tolerance
IROUT VREFOUT Output Current
∆VREFOUT _{VREFOUT Line Regulation}
/∆VIN
∆VREFOUT _{VREFOUT Load Regulation}
/∆IOUT
ILIM VREFOUT Short Current Limit
∆VREFOUT _{VREFOUT Voltage}
/∆T Temperature Coefficient
VFB1 VFB1 Voltage
∆VFB1/∆T VFB1 Voltage
Temperature Coefficient
IFB1,2 IFB1,2 Input Current
fOSC Oscillator Frequency
IDD1 Supply Current
Maxdty Maximum Duty Cycle
REXTH1 EXT1 “H” ON Resistance
Conditions
VIN=3.3V, IOUT=1mA
VIN=3.3V
2.5V≤ VIN ≤ 5.5V
1mA≤ IROUT ≤ 10mA
VIN=3.3V
VIN=3.3V, VREFOUT=0V
-40°C≤ Topt ≤ 85°C
VIN=3.3V
-40°C≤ Topt ≤ 85°C
VIN=5.5V,VFB1 or VFB2=0V or 5.5V
EXT1,2 Pins at no load, VIN=3.3V
VIN=5.5V, EXT1,2 pins at no load
VIN=3.3V, CDTC1,2=1000pF
VIN=3.3V, IEXT=-20mA
REXTL1 EXT1 “L” ON Resistance
VIN=3.3V, IEXT=20mA
REXTH2 EXT2 “H” ON Resistance VIN=3.3V, IEXT=-20mA
REXTL2 EXT2 “L” ON Resistance
VIN=3.3V, IEXT=20mA
TDLY Delay Time for Protection VIN=3.3V, VFB1=1.1V→0V
Tss1 Soft Start Time1 for Ch1
VIN=3.3V, CDTC1=0.33µF
Tss2 Soft Start Time2 for Ch2
VIN=3.3V, CDTC2=0.33µF
VCEH CE “H” Input Voltage
VIN=5.5V
VCEL CE “L” Input Voltage
VIN=2.5V
VUVLOD UVLO Detector Threshold
VUVLO UVLO Released Voltage
ICEH
ICEL
ISTB
VOFF2
CE “H” Input Current
CE “L” Input Current
Standby Current
Input Offset Voltage of Ch2.
VIN= VCE =5.5V
VIN=5.5V, VCE=0.0V
VIN=5.5V, VCE=0.0V
VIN=3.3V
MIN.
2.5
1.478
20
TYP.
1.500
2
(Topt=25°C)
MAX. Unit
5.5
V
1.522
V
mA
6
mV
6
12
mV
25
±150
mA
ppm/°C
0.985 1.000 1.015
V
±150
ppm/°C
-0.1
0.1
µA
595 700 805
kHz
1.4 3.0
mA
84
90
95
%
4.0 8.0
Ω
2.7 5.0
Ω
4.0 8.0
Ω
3.7 8.0
Ω
60
100 140
ms
10
ms
15
ms
1.5
V
0.3
V
2.10 2.20 2.35
V
VUVLOD 2.45
V
+0.10
-0.1
0.1
µA
-0.1
0.1
µA
0
2
µA
-12
12
mV
Rev.1.10
-6-