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R1218XXX1A Datasheet(PDF) 5 Page - RICOH electronics devices division

Part # R1218XXX1A
Description  Step-up DC/DC converter for Whilte LED Backlight
Download  14 Pages
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Manufacturer  RICOH [RICOH electronics devices division]
Direct Link  http://www.ricoh.com
Logo RICOH - RICOH electronics devices division

R1218XXX1A Datasheet(HTML) 5 Page - RICOH electronics devices division

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R1218X
5
Symbol
Item
Conditions
MIN.
TYP.
MAX.
Unit
VFB
VFB Voltage Tolerance
VIN=3.6V
0.19
0.20
0.21
V
∆VFB/∆T
VFB Voltage Temperature
Coefficient
VIN=3.6V, -40
°C≤Topt≤85°C
±150
ppm
/
°C
IFB
VFB Input Current
VIN=5.5V, VFB=0V or 5.5V
-0.1
0.1
µA
RON
Switch On Resistance
VIN=3.6V, ISW=100mA
1.5
Ω
R1218XXX1A
VLX=20V
0.0
3.0
µΑ
IOFF
Switch Leakage Current
R1218XXX2A
VLX=29V
0.0
3.0
µΑ
ILIM
Switch Current Limit
VIN=3.6V
400
700
1000
mA
fOSC
Oscillator Frequency
VIN=3.6V, VOUT=VFB=0V
1000
1200
1400
kHz
Maxduty
Maximum Duty Cycle
VIN=3.6V, VOUT=VFB=0V
86
91
%
R1218X021A
8.5
9.5
10.5
V
R1218X031A
13.0
14.0
15.0
V
R1218X041A
17.0
18.5
20.0
V
R1218X052A
21.5
23.0
24.5
V
VOVP1
OVP Detector Threshold
VIN=3.6V
VOUT rising
R1218X062A
26.0
27.5
29.0
V
R1218X021A
VOVP1-0.5
V
R1218X031A
VOVP1-0.75
V
R1218X041A
VOVP1-1.0
V
R1218X052A
VOVP1-1.25
V
VOVP2
OVP Released Voltage
VIN=3.6V
VOUT falling
R1218X062A
VOVP1-1.5
V
• R1218XXX1A
Symbol
Item
Conditions
MIN.
TYP.
MAX.
Unit
VF
Diode Forward Voltage
IDIODE=100mA
0.8
V
IR
Diode Leakage Current
VOUT=20V, VLX=0V
10
µA
TEST CIRCUITS
Supply Current Test Circuit
UVLO Detector Threshold/ UVLO Released Voltage
V
V
V
V
IN
IN
IN
IN
CE
CE
CE
CE
GND
GND
GND
GND
V
V
V
VFB
FB
FB
FB
V
V
V
VIN
IN
IN
IN
L
L
L
LXXXX
CE
CE
CE
CE
GND
GND
GND
GND
V
V
V
V FB
FB
FB
FB


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