Part number

Package

Marking

GRE

SOT23-5, Green

Pin N0.

Symbol

I / O

Description

1

LX

I

Step-up Regulator N-MOS Drain. Place output diode and inductor.

2

GND

P

Ground

3

FB

I

Step-Up Regulator Feedback Input. Connect a sense resistor from FB to

ground. (KB4312B FB=240mV,KB4312A FB=1.27V)

4

EN

I

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.

5

OVP

I

Over-voltage protection input(ADJ)

6

VIN

P

Power supply.

Parameter

Rated Value

Unit

VIN voltage

-0.3 to +6.5

V

LX , OVP voltage

-0.3 to +28

V

EN , FB to GND

-0.3 to +6.5

V

0.25

A

Continuous power dissipation (SOT23-6 Ta=+25

0.35

W

Operating Junction Temperature Range

-35 to 85

Lead

Temperature (Soldering 5 sec)

260

Storage Temperature

-65 to 125

Package Thermal Resistance (

250

/W

ESD Susceptibility (HBM)

2

KV

ESD Susceptibility (MM)

200

V

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

KB4312

Kingbor Technology Co.,Ltd

TEL:(86)0755-26508846 FAX:(86)0755-26509052

PIN CONFIGURATION

ORDER INFORMATION

PIN DESCRIPTION

(Note 1)

ABSOLUTE MAXIMUM RATINGS

KB4312A-

2

3

6

4

GND

EN

FB

5

OVP

SOT23-6

SOT23-6

2

3

5

4

GND

EN

FB

SOT23-5

SOT23-5

KB4312B

KB4312A

FB=240mV

FB=1.27V

Part number

Package

Marking

GRE

SOT23-6, Green

5121m,Date Code with one bottom line

KB4312B-

ATxxxx,

xxxx: Date Code

5121x,

x: Date Code