R1218XXX1A RICOH [RICOH electronics devices division], R1218XXX1A Datasheet - Page 5

• Manufacturer Part Number: R1218XXX1A
• Description: Step-up DC/DC converter for Whilte LED Backlight
• Manufacturer: RICOH [RICOH electronics devices division]

TEST CIRCUITS
Supply Current Test Circuit
Maxduty
Symbol
R1218XXX1A
Symbol
V
V
V
f
R
I
V
I
OSC
OVP1
OVP2
I
OFF
FB
LIM
FB
FB
V
ON
I
R
F
/ T
V
V
Coefficient
V
Switch On Resistance
Switch Leakage Current
Switch Current Limit
Oscillator Frequency
Maximum Duty Cycle
OVP Detector Threshold
OVP Released Voltage
FB
FB
FB
Diode Forward Voltage
Diode Leakage Current
GND
GND
GND
GND
V V V V
CE
CE
CE
CE
Voltage Temperature
Input Current
Voltage Tolerance
IN
IN
IN
IN
Item
Item
V V V V
FB
FB
FB
FB
V
V
V
V
R1218XXX1A
R1218XXX2A
V
V
V
V
V
V
V
IN
IN
IN
IN
IN
IN
IN
IN
OUT
IN
OUT
=3.6V
=3.6V, -40 C Topt 85 C
=5.5V, V
=3.6V, I
=3.6V
=3.6V, V
=3.6V, V
=3.6V
=3.6V
I
V
DIODE
OUT
rising
falling
=20V, V
Conditions
=100mA
SW
FB
OUT
OUT
Conditions
=100mA
=0V or 5.5V
R1218X021A
R1218X031A
R1218X041A
R1218X052A
R1218X062A
R1218X021A
R1218X031A
R1218X041A
R1218X052A
R1218X062A
UVLO Detector Threshold/ UVLO Released Voltage
=V
=V
LX
V
FB
FB
V
LX
=0V
LX
=0V
=0V
=29V
=20V
GND
GND
GND
GND
V V V V
CE
CE
CE
CE
400
1000
86
8.5
13.0
17.0
21.5
26.0
MIN.
IN
IN
IN
IN
0.19
-0.1
MIN.
V
V
V
V
V
OVP1
OVP1
OVP1
OVP1
OVP1
V V V V
TYP.
0.20
TYP.
L L L L
150
0.8
10
FB
FB
FB
FB
-0.5
-0.75
-1.0
-1.25
-1.5
X X X X
MAX.
MAX.
1000
1400
0.21
10.5
15.0
20.0
24.5
29.0
0.1
3.0
3.0
R1218X
Unit
Unit
ppm
kHz
/ C
mA
V
%
V
V
V
V
V
V
V
V
V
V
A
V
A
5