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Technical content

Features

„ High Efficiency: Up to 95% „ Low Quiescent Current: Only 50µA During Op- eration „ Internal Soft Start Function „ 600mA Output Current „ 2.5V to 6V Input Voltage Range „ 1.2MHz Switching Frequency „ No Schottky Diode Required „ 100% Duty Cycle in Dropout Operation „ 0.6V Reference Allows Low Output Voltages „ <1µA Shutdown Current „ Current Mode Operation for Excellent Line and Load Transient Response LDO Regulator „ Ultra Low Output Noise 30µV (rms) „ Ultra Low 55µA No-Load Supply Current „ Ultra Low Dropout 70mV @ 50mA Load „ Guarantee 300mA Output Current „ Fixed Mode: No External Resistor Network Needed „ Max. Supply Current in Shutdown Mode < 1µA „ Stable with Low Cost Ceramic Capacitors „ Over Temperature Protected „ RoHS Compliant

Applications

„ Digital Still and Video Cameras „ MP3 Players „ Portable Instruments General Description The G5723 consists of a synchronous step-down DC/DC converter and a low-noise LDO regulator. The DC/DC converter is operated on current mode archi- tecture. Switching frequency is set at 1.2MHz allowing the use of small surface mount inductor and capacitor. The internal synchronous switches increase efficiency and eliminate the need for external Schottky diode. It is ideal for system powered by a 1-cell Li-ion battery.

Ordering Information

NUMBER MARKING VOLTAGE TEMP. RANGE PACKAGE (Green) G5723-18P71U G 5723G 1.8V -40 °C to +85°C MSOP-10 G5723-30P71U G 5723E 3.0V -40 °C to +85°C MSOP-10 G5723-33P71U G 5723F 3.3V -40 °C to +85°C MSOP-10 Note: P7: MSOP-10 1: Bonding Code U: Tape & Reel Pin Configuration Typical Application Circuit VOUT1 = 0.6V × (1+ )R1 IN1 LX EN1 FB1 G5723 CIN1 2.2µF VIN 3.3~4.2V 2.2µH CFB 18KR2 18K COUT1 10µF VOUT1 1.2V 600mA* (option) COUT2 4.7µF IN2 EN2 OUT2 VOUT2 CIN2 1µF BATTERY AGND PGND FB1 EN1 AGND AGND LX PGND IN1 OUT2 MSOP-10 G5723 65EN2 IN2 VOUT1 = 0.6V × (1+ )R1 R2VOUT1 = 0.6V × (1+ )R1 IN1 LX EN1 FB1 G5723 CIN1 2.2µF VIN 3.3~4.2V 2.2µH CFB 18KR2 18K COUT1 10µF VOUT1 1.2V 600mA* (option) COUT2 4.7µF IN2 EN2 OUT2 VOUT2 CIN2 1µF BATTERY AGND PGND FB1 EN1 AGND AGND LX PGND IN1 OUT2 MSOP-10 G5723 65EN2 IN2