LTC3547EDDB#TRMPBF

LTC3547 is a dual, constant-frequency, synchronous step-down DC/DC converter. 100% duty cycle provides low dropout operation, extending battery life in portable systems. Low output voltages are supported with the 0.6V feedback reference voltage. Each regulator can supply 300mA continuous output current. The input voltage range is 2.5V to 5.5V, making it ideal for Li-Ion and USB powered applications. Supply current during operation is only 40µA and drops to <lt/> 1µA in shutdown. Automatic Burst Mode® operation increases efficiency at light loads, further extending battery life. An internally set 2.25MHz switching frequency allows the use of tiny surface mount inductors and capacitors. Internal soft-start reduces inrush current during startup. All outputs are internally compensated to work with ceramic capacitors. It is used in application such as cellular telephones, digital still cameras, wireless and DSL modems, PDAs/palmtop PCs, portable media players etc.

• High efficiency dual step-down outputs upto 96%
• Automatic low ripple burst mode operation is 20mVP-P typical
• Internally compensated for all ceramic capacitors
• Independent internal soft-start for each channel
• Current mode operation for excellent line and load transient response
• 0.6V reference allows low output voltages
• Short-circuit protected
• Operating ambient temperature is -40°C to 85°C
• Package style is 8-lead plastic DFN

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party