Kingbor Technology Co.,Ltd
KB4312
TEL:(86)0755-26508846 FAX:(86)0755-26509052
PIN CONFIGURATION
SOT23-6
SOT23-5
SOT23-6
SOT23-5
1
2
3
6
5
4
V
1
2
3
5
LX
GND
FB
V
IN
LX
GND
FB
IN
OVP
EN
4
EN
KB4312B
FB=240mV
KB4312A
FB=1.27V
ORDER INFORMATION
Part number
Package
Marking
ATxxxx, xxxx: Date Code
KB4312A-
GRE
SOT23-5, Green
Part number
Package
Marking
5121x, x: Date Code
KB4312B-
GRE
SOT23-6, Green
5121m,Date Code with one bottom line
PIN DESCRIPTION
Pin N0. Symbol
I / O Description
1
2
LX
GND
I
Step-up Regulator N-MOS Drain. Place output diode and inductor.
Ground
P
Step-Up Regulator Feedback Input. Connect a sense resistor from FB to
ground. (KB4312B FB=240mV,KB4312A FB=1.27V)
Enable and Dimming Control Input. LED brightness and IC shutdown are
controlled by the voltage on EN. Driving low for longer than 4ms to
shutdown the IC.
3
FB
I
4
EN
I
5
6
OVP
VIN
I
Over-voltage protection input(ADJ)
Power supply.
P
(Note 1)
ABSOLUTE MAXIMUM RATINGS
VIN voltage
Parameter
Rated Value
-0.3 to +6.5
-0.3 to +28
-0.3 to +6.5
0.25
Unit
V
LX , OVP voltage
EN , FB to GND
V
V
Switch Current (ILX)
Continuous power dissipation (SOT23-6 Ta=+25 OC)
Operating Junction Temperature Range
A
0.35
-35 to 85
W
к
Lead Temperature (Soldering 5 sec)
Storage Temperature
260
к
к
-65 to 125
250
2
Package Thermal Resistance (ӘJA)
ESD Susceptibility (HBM)
ESD Susceptibility (MM)
к/W
KV
V
200
Note1:Permanent device damage may occur if Absolute Maximum Ratings are exceeded. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability
2
KINGBOR [ KINGBOR TECHNOLOGY CO ]
