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KB3302

Kingbor Technology
Part Number KB3302
Manufacturer Kingbor Technology
Description 2MHz Step-up Switching regulator
Published Jul 24, 2008
Detailed Description Kingbor Technology Co.,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052 KB3302 2Amp, 2MHz Step-up Switching regulator wi...
Datasheet PDF File KB3302 PDF File

KB3302
KB3302

Overview
Kingbor Technology Co.
,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052 KB3302 2Amp, 2MHz Step-up Switching regulator with Soft-Start FEATURES Up to 95% Efficiency ■ TDB uA No Load Current www.
DataSheet4U.
com ■ 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 ■ DESCRIPTION The KB3302 is a high-frequency current-mode step-up switching regulator with an integrated 2A power transistor.
Its high switching frequency (programmable up to 2MHz) allows the use of tiny surface-mount external passive 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 applications 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 is available in thermally enhanced 8-Pin MSOP packages.
APPLICATIONS ■ ■ ■ ■ ■ ■ ■ Flat screen LCD bias supplies TFT bias supplies XDSL power supplies Medical equipment Digital video cameras Portables devices White LED power supplies TYPICAL APPLICATION VIN = 3.
3V TO 4.
2V C1 4.
7µF L1 3.
3µH KB3302 Efficiency  VOUT 1N5819 5.
0V 1000mA 95 VOUT = 5V 90 1.
2MHz VIN = 4.
2V 6 VIN 5 SW R1 300k 85 KB3302 7 SS GND MSOP8 COMP ROSC 1 R3 17.
4k 1nF R2 100k Efficiency (%)  3 SHDN FB 2 C3 22 µF 80 75 70 65 60 VIN = 3.
6V 100nF 4 8 R3 10.
7k VIN = 2.
6V L1: Sumida CR43 55 50 0.
001 Figure 1.
1.
2MHzAll Ceramic Capacitor Single L i-ion Cell to 5V Boost Converter.
0.
010 0.
100 1.
000 Load Curren...


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