R1280D002X Datasheet, PDF (5/26 Pages) RICOH electronics devices division – 2CH PWM DC/DC Controller

s ELECTRICAL CHARACTERISTICS
q R1280D002A
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
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, 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
VUVLOD UVLO Detector Threshold
VUVLO UVLO Released Voltage
VDTC10 CH1 Duty=0%
VDTC1100 CH1 Duty=100%
VIN=3.3V
VIN=3.3V
VDTC20 CH2 Duty=0%
VDTC2100 CH2 Duty=100%
VIN=3.3V
VIN=3.3V
AV1
FT1
VICR1
CH1 Open Loop Gain
VIN=3.3V
CH1 Single Gai n Frequency VIN=3.3V, AV1=0dB
Band
CH1 Input Voltage Range VIN=3.3V
IAMPL
IAMPH
AV2
FT1
VICR1
CH1 Sink Current
VIN=3.3V, VAMPOUT1=1.0V,
VFB1=VFB1+ 0.1V
CH1 Source Current
VIN=3.3V, VAMPOUT1=1.0V,
VFB1=VFB1- 0.1V
CH2 Open Loop Gain
VIN=3.3V
CH2 Single Gain Frequency VIN=3.3V, AV2=0dB
Band
CH2 Input Voltage Range VIN=3.3V,
VFB2 CH2 Input Offset Voltage
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
595 700 805
1.4 3.0
4.0 8.0
2.7 5.0
4.0 8.0
3.7 8.0
60
100 140
2.10
0.1
1.1
2.20
VUVLOD
+0.10
0.2
1.2
2.35
2.45
0.3
1.3
0.1
0.2 0.3
1.1
1.2 1.3
110
1.9
µA
kHz
mA
Ω
Ω
Ω
Ω
ms
V
V
V
V
V
V
dB
MHz
0.7 to
V
VIN
70
115
µA
-1.4 -0.7
mA
60
dB
3
MHz
-0.2 to
V
VIN-1.3
-12
12
mV
Rev. 1.10
-5-