1

■

Up to 95% Efficiency

■

TDB uA No Load Current

■

1000mA Output Current

■

1.5V to 16V Input Voltage Range

■

Programmable switching frequency up to 2MHz

■

Output voltage up to 32V

■

Constant switching frequency current-mode control

■

1.23V Reference Allows Low Output Voltages

■

Shutdown Mode Draws 10

µA Supply Current

■

Low saturation voltage switch: 220mV at 2A

■

Overtemperature Protected,Soft-Start function

■

8-Pin MSOP Packages

■

Flat screen LCD bias supplies

KB3302

Kingbor Technology Co.,Ltd

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

APPLICATIONS

FEATURES

DESCRIPTION

TYPICAL APPLICATION

Figure 1. 1.2MHzAll Ceramic Capacitor Single Li-ion Cell

to 5V Boost Converter.

regulator with Soft-Start

2Amp, 2MHz Step-up Switching

TO 4.2V

5.0V

1000mA

GND

VIN

C1

L1

3.3

µH

R1

300k

C3

22

µF

6

7

KB3302

MSOP8

4.7

µF

The KB3302 is a high-frequency current-mode step-up

switching regulator with an integrated 2A power transis-

tor. Its high switching frequency (programmable up to

2MHz) allows the use of tiny surface-mount external pas-

sive components. Programmable soft-start eliminates high

inrush current during start-up. The internal switch is rated

at 32V making the converter suitable for high voltage ap-

plications such as Boost, SEPIC and Flyback.

The operating frequency of the KB3302 can be set with an

external resistor. The ability to set the operating frequency

gives the KB3302 design flexibilities. A dedicated COMP

pin allows optimization of the loop response. The KB3302

L1: Sumida CR43

1N5819

SW

5

R2

100k

R3

17.4k

1nF

R3

10.7k

100nF

SHDN

SS

FB

COMP

ROSC

3

2

50

55

60

65

70

75

80

85

90

95

0.001

0.010

0.100

1.000

Load Current (A)

1.2MHz

KB3302 Efficiency

4

8

1

is available in thermally enhanced 8-Pin MSOP packages.