LTC3419EDD#PBF

LTC3419 is a dual, 2.25MHz, 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 600mA output current. A user selectable mode input allows the user to trade off between high efficiency Burst Mode operation and pulse-skipping mode. An internally set 2.25MHz switching frequency allows the use of tiny surface mount inductors and capacitors. Internal soft-start reduces inrush current during start-up. Both outputs are internally compensated to work with ceramic output capacitors. It is widely used in application such as cellular telephones, digital still cameras, wireless and DSL modems, portable media players, PDAs/palmtop PCs etc.

• Input voltage range is 2.5V to 5.5V
• No schottky diodes required, 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, user-selectable Burst Mode® Operation
• Short-circuit protected, ultralow shutdown current is 1μA maximum
• Input DC supply current (sleep mode) is 35μA typical at (VFB1 = VFB2 = 1.05 × VFBREG)
• High efficiency dual step-down outputs upto 96%
• Operating junction temperature is -40°C to 125°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