Kingbor Technology Co.,Ltd
TEL:(86)0755-26508846 FAX:(86)0755-26509052
KB3426
1.5MHz, 800mA Synchronous Step-Down Regul...
Kingbor Technology Co.,Ltd
TEL:(86)0755-26508846 FAX:(86)0755-26509052
KB3426
1.5MHz, 800mA Synchronous Step-Down
Regulator in SOT23-5
FEATURES
High Efficiency: Up to 96% Very Low Quiescent Current: Only 20µA www.DataSheet4U.com During Operation ■ 800mA Output Current ■ 2.5V to 6.5V Input Voltage Range ■ 1.5MHz Constant Frequency Operation ■ 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 (1mm) SOT23-5 Package
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DESCRIPTION
The KB3426 is a high efficiency monolithic synchronous buck
regulator using a constant frequency, current mode architecture. The device is available in an adjustable version and fixed output voltages of 1.8V and 3.3V. Supply current during operation is only 20µA and drops to ) 1µA in shutdown. The 2.5V to 5.5V input voltage range makes the KB3426 ideally suited for single Li-Ion battery-powered applications. 100% duty cycle provides low dropout operation, extending battery life in portable systems. Automatic Burst Mode operation increases efficiency at light loads, further extending battery life. Switching frequency is internally set at 1.5MHz, allowing the use of small surface mount inductors and capacitors. The internal synchronous switch increases efficiency and eliminates the need for an external
Schottky diode. Low output voltage...