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R1280D002X Datasheet(PDF) 6 Page - RICOH electronics devices division

Part # R1280D002X
Description  2CH PWM DC/DC Controller?
Download  26 Pages
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Manufacturer  RICOH [RICOH electronics devices division]
Direct Link  http://www.ricoh.com
Logo RICOH - RICOH electronics devices division

R1280D002X Datasheet(HTML) 6 Page - RICOH electronics devices division

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Rev.1.10
- 6 -
q
R1280D002B
(Topt=25
°C)
Symbol
Item
Conditions
MIN.
TYP.
MAX.
Unit
VIN
Operating Input Voltage
2.5
5.5
V
VREFOUT VREFOUT Voltage Tolerance
VIN=3.3V, IOUT=1mA
1.478
1.500
1.522
V
IROUT
VREFOUT Output Current
VIN=3.3V
20
mA
∆VREFOUT
/
∆VIN
VREFOUT Line Regulation
2.5V
≤ VIN ≤ 5.5V
26
mV
∆VREFOUT
/
∆IOUT
VREFOUT Load Regulation
1mA
≤ IROUT ≤ 10mA
VIN=3.3V
612
mV
ILIM
VREFOUT Short Current Limit VIN=3.3V, VREFOUT=0V
25
mA
∆VREFOUT
/
∆T
VREFOUT Voltage
Temperature Coefficient
-40
°C≤ Topt ≤ 85°C
±150
ppm/
°C
VFB1
VFB1 Voltage
VIN=3.3V
0.985
1.000
1.015
V
∆VFB1/
∆T VFB1 Voltage
Temperature Coefficient
-40
°C≤ Topt ≤ 85°C
±150
ppm/
°C
IFB1,2
IFB1,2 Input Current
VIN=5.5V,VFB1 or VFB2=0V or 5.5V
-0.1
0.1
µA
fOSC
Oscillator Frequency
EXT1,2 Pins at no load, VIN=3.3V
595
700
805
kHz
IDD1
Supply Current
VIN=5.5V, EXT1,2 pins at no load
1.4
3.0
mA
Maxdty Maximum Duty Cycle
VIN=3.3V, CDTC1,2=1000pF
84
90
95
%
REXTH1 EXT1 “H” ON Resistance
VIN=3.3V, IEXT=-20mA
4.0
8.0
REXTL1 EXT1 “L” ON Resistance
VIN=3.3V, IEXT=20mA
2.7
5.0
REXTH2 EXT2 “H” ON Resistance
VIN=3.3V, IEXT=-20mA
4.0
8.0
REXTL2 EXT2 “L” ON Resistance
VIN=3.3V, IEXT=20mA
3.7
8.0
TDLY
Delay Time for Protection
VIN=3.3V, VFB1=1.1V
→0V
60
100
140
ms
Tss1
Soft Start Time1 for Ch1
VIN=3.3V, CDTC1=0.33
µF
10
ms
Tss2
Soft Start Time2 for Ch2
VIN=3.3V, CDTC2=0.33
µF
15
ms
VCEH
CE “H” Input Voltage
VIN=5.5V
1.5
V
VCEL
CE “L” Input Voltage
VIN=2.5V
0.3
V
VUVLOD UVLO Detector Threshold
2.10
2.20
2.35
V
VUVLO UVLO Released Voltage
VUVLOD
+0.10
2.45
V
ICEH
CE “H” Input Current
VIN= VCE =5.5V
-0.1
0.1
µA
ICEL
CE “L” Input Current
VIN=5.5V, VCE=0.0V
-0.1
0.1
µA
ISTB
Standby Current
VIN=5.5V, VCE=0.0V
0
2
µA
VOFF2
Input Offset Voltage of Ch2.
VIN=3.3V
-12
12
mV


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