LTC3549
250mA Low VIN Buck
Regulator in 2mm × 3mm DFN
U U
FEATURES
■ 1.
6V to 5.
5V Input Voltage Range ■ Internal Soft-Start ■ Low Ripple Burst Mode® Operation
Output Ripple: 20mVP-P IQ: 50µA ■ 2.
25MHz Constant-Frequency Operation ■ High Efficiency: Up to 93% ■ 250mA Output Current (VIN = 1.
8V, VOUT = 1.
2V) ■ 450mA Peak Inductor Current ■ No
Schottky Diode Required ■ Low Dropout Operation: 100% Duty Cycle ■ 0.
611V Reference Voltage ■ Stable with Ceramic Capacitors ■ Shutdown Mode Draws 1µA Supply Current ■ Current Mode Operation for Excellent Line and Load Transient Response ■ Overtemperature Protection ■ Available in a Low Profile (0.
75mm) 6-Lead (2mm x 3mm) DFN Package
U APPLICATIO S
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