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KB3361

Kingbor Technology
Part Number KB3361
Manufacturer Kingbor Technology
Description 1.4MHz 800mA High Efficiency Synchronous Step-Down Regulator
Published Jul 24, 2008
Detailed Description Kingbor Technology Co.,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052 KB3361 1.4MHz 800mA High Efficiency Synchronous...
Datasheet PDF File KB3361 PDF File

KB3361
KB3361

Overview
Kingbor Technology Co.
,Ltd TEL:(86)0755-26508846 FAX:(86)0755-26509052 KB3361 1.
4MHz 800mA High Efficiency Synchronous Step-Down Regulator in SOT23-5 FEATURES High Efficiency: Up to 97% 75 µ A No Load Quiescent Current www.
DataSheet4U.
com ■ 800mA Output Current ■ 2.
5V to 6.
5V Input Voltage Range ■ 1.
4MHz Switching Frequency ■ No Schottky Diode Required ■ Low Dropout Operation: 100% Duty Cycle ■ 0.
6V Reference Allows Low Output Voltages ■ Shutdown Mode Draws ) 1µA Supply Current ■ Current Mode Operation for Excellent Line and Load Transient Response ■ Overtemperature Protected ■ Low Profile (1.
3mm) SOT23-5 Package ■ ■ DESCRIPTION The KB3361 SwitchReg is a member of Kingbor(KB) product family.
It is a 1.
4MHz stepdown converter with an input voltage range of 2.
5V to 6.
5V and output as low as 0.
6V.
Its low supply current, small size, and high switching frequency make the KB3361 the ideal choice for portable applications.
The KB3361 is available in either a programmable version with external feedback resistors.
It can deliver up to 800mA of load current while maintai27µA no load quiescent current.
The 1.
4MHz ning a low 75 The 1.
4MHz switching frequency minimizes the size of external components while keeping switching losses low.
The KB3361 feedback and control delivers excel lent load regulation and transient response with a small output inductor and capacitor.
The KB3361 is designed to maintain high efficiency throughout the operating range and provides fast turn-on time.
The KB3361 is available in a low profile (1.
3mm) SOT23-5 package and is rated over the -40°C to +85°C temperature range.
APPLICATIONS ■ ■ ■ ■ ■ ■ Cellular Telephones Personal Information Appliances Wireless and DSL Modems Digital Still Cameras MP3 Players Portable Instruments TYPICAL APPLICATION 100 22pF KB3361 1 RUN GND 2 VFB 5 450k 100k EFFICIENCY (%) VIN 3.
6V to 6.
5V 4 + CIN 10 µF VIN SW 3 4.
7µH COUT 10µF CER VOUT 3.
3V 800mA VIN = 3.
6V 90 80 70 60 50 VIN = 5.
0V VIN = 4.
2V 0.
1 1 ...


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