FEATURES
■ High Efficiency: Up to 96% ■ Very Low Quiescent Current: Only 20µA ■ Low Output Ripple Voltage During Burst Mo...
FEATURES
■ High Efficiency: Up to 96% ■ Very Low Quiescent Current: Only 20µA ■ Low Output Ripple
Voltage During Burst Mode®
Operation ■ 600mA Output Current ■ 2.5V to 5.5V Input
Voltage Range ■ 1.5MHz Constant Frequency Operation ■ No Schottky Diode Required ■ Low Dropout Operation: 100% Duty Cycle ■ ±2% 0.6V Reference ■ Shutdown Mode Draw ≤1µA Supply Current ■ Internal Soft-Start Limits Inrush Current ■ Current Mode Operation for Excellent Line and
Load Transient Response ■ Overtemperature Protected ■ Low Profile (1mm) ThinSOTTM Package
APPLICATIONS
■ Cellular Telephones ■ Wireless and DSL Modems ■ Digital Still Cameras ■ Media Players ■ Portable Instruments ■ Point of Load Regulation
TYPICAL APPLICATION
2.2μH
VIN VIN SW 4.7μF
22pF
CER LTC3406A
RUN VFB GND
619k 309k
3406A TA01
VOUT 1.8V 600mA
10μF CER
LTC3406A
1.5MHz, 600mA Synchronous Step-Down
Regulator in ThinSOT
DESCRIPTION
The LTC®3406A is a high efficiency monolithic synchronous buck regulator using a constant frequency, current mode architecture. Supply current during operation is only 20μA, dropping to ≤1μA in shutdown. The 2.5V to 5.5V input
voltage range makes the LTC3406A ideally suited for single Li-Ion battery-powered applications. 100% duty cycle provides low dropout operation, extending battery runtime portable systems. Automatic Burst Mode operation increases efficiency at light loads, further extending battery runtime.
Switching frequency is internally set at 1.5MHz, allowing the use of small surface mo...
