R1218X Datasheet, PDF (5/14 Pages) RICOH electronics devices division – Step-up DC/DC converter for Whilte LED Backlight

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