Using a constant frequency current mode architecture, the LTC3564 operates from an input voltage range of 2.5V to 5.5V, making it ideal for Li-Ion battery inputs as well as 3.3V or 5V inputs for point-of-load applications. It can generate output voltages as low as 0.6V, enabling it to power the latest generation of low voltage DSPs and microcontrollers. It utilizes a constant 2.25MHz switching frequency, enabling the use of tiny, low cost ceramic capacitors and inductors less than a 1mm in height, providing a very compact solution footprint.
The LTC3564 uses internal switches with an RDS(ON) of only 0.15Ohm (N-Channel and P-Channel) to deliver efficiencies as high as 96%. It also has low dropout 100% duty cycle operation to extend battery run-time. The LTC3564 utilizes automatic Burst Mode™ operation to achieve only 20uA of no load quiescent current and less than 1uA in shutdown. Other features include ±2% output voltage accuracy, current mode operation and over-temperature protection.
The LTC3564EDBC is available in a 2mm x 3mm DFN-6 package while the LTC3564ES5 is available in a 5-lead ThinSOT package.
| Summary of Features: LTC3564 | |
 | High Efficiency: Up to 96% |
| Very Low Quiescent Current: Only 20uA |
| 1.25A Output Current |
| 2.5V to 5.5V Input Voltage Range |
| 2.25MHz Constant Frequency Operation |
| No Schottky Diode Required |
| Low Dropout Operation: 100% Duty Cycle |
| 0.6V Reference Allows Low Output Voltages |
| Shutdown Mode Draws ≤1uA Supply Current |
| Current Mode Operation for Excellent Line and Load Transient Response |
| Over-temperature Protected |
| Low Profile (1mm) ThinSOTTM & 6-Lead 2mm × 3mm DFN Packages |
