R1218X Datasheet, PDF (4/14 Pages) RICOH electronics devices division – Step-up DC/DC converter for Whilte LED Backlight

R1218X
• PLP1820-6
Pin No
1
2
3
4
5
6
Symbol
CE
VFB
Lx
GND
VIN
VOUT
Pin Description
Chip Enable Pin
Feedback Pin
Switching Pin (Open Drain Output)
Ground Pin
Power Supply Input Pin
Output Voltage
ABSOLUTE MAXIMUM RATINGS
Symbol
Item
Rating
Unit
VIN
VIN Pin Voltage
6.5
V
VCE
CE Pin Voltage
-0.3 to VIN+0.3
V
VFB
VFB Pin Voltage
-0.3 to VIN+0.3
V
VOUT
VOUT Pin Voltage
R1218XXX1A
R1218XXX2A
-0.3 to 22.0
V
-0.3 to 32.0
VLX
Lx Pin Voltage
R1218XXX1A
R1218XXX2A
-0.3 to 22.0
V
-0.3 to 32.0
ILX
Lx Pin Current
1000
mA
PD
Power Dissipation
R1218NXXXA suspended in air
250
mW
R1218KXXXA*Note1
880
Topt
Operating Temperature Range
-40 to +85
°C
Tstg
Storage Temperature Range
-55 to 125
°C
(*Note 1) Mounted on board. Conditions: Board material: FR4 Board Dimensions: 40*40*1.6(mm), Double layer,
Wiring Ratio=50%(Both sides), Thermal via: 0.54mm*30pcs, Wind velocity: 0m/s
ELECTRICAL CHARACTERISTICS
• Common
(Topt=25°C)
Symbol
Item
Conditions
VIN Operating Input Voltage
IIN
Supply Current
VIN=5.5V, VFB=0V, Lx at no load
ISTB Standby Current
VIN=5.5V, VCE=0V
VUVLO1 UVLO Detector Threshold VIN falling
VUVLO2 UVLO Released Voltage VIN rising
VCEH CE “H” Input Voltage
VIN=5.5V
VCEL CE “L” Input Voltage
VIN=1.8V
RCE CE Pull Down Resistance VIN=3.6V
Tshudn CE Shutdown Delay
VIN=3.6V
MIN.
TYP.
1.8
0.5
0.0
1.5
1.6
VUVLO1+0.1
1.5
600
1200
10
MAX.
5.5
1.0
3.0
1.7
1.8
0.5
1600
Unit
V
mA
µA
V
V
V
V
kΩ
ms
4