The new regulator operates from an input voltage of 4V to 15V, making it ideal for dual-cell Li-Ion applications, as well as fixed rail systems with voltages up to 12V. The LTC3605’s switching frequency is user programmable from 800kHz to 4MHz, enabling the use of tiny low cost capacitors and inductors.
The LTC3605 uses internal N-channel switches with RDS(ON)s of only 35mOhm and 70mOhm to deliver efficiencies as high as 96%. Its low minimum on-time allows low duty cycle operation at high switching frequencies. The LTC3605’s PolyPhase operation (up to 12 phases) allows multiple regulators to be cascaded, running out of phase to minimize input and output capacitance. Current mode operation offers fast transient response while simplifying compensation. Additional features include output tracking and a shutdown current of only 15uA.
The LTC3605EUF is available in a 4mm x 4mm QFN-24. Pricing starts at $4.25 each in 1,000-piece quantities and is available from stock.
Summary of Features: LTC3605:
High Efficiency: Up to 96%;
5A Output Current;
4V to 15V VIN Range;
Integrated Power N-Channel MOSFETs (70mOhm Top and 35mOhm Bottom);
Adjustable Frequency 800kHz to 4MHz;
PolyPhase Operation (Up to 12 Phases);
Output Tracking;
0.6V ±1% Reference Accuracy;
Current Mode Operation for Excellent Line & Load Transient Response;
Shutdown Mode Draws Less than 15uA Supply Current;
Available in 24-Pin (4mm × 4mm) QFN Package.
