LTC3407EMSE-4#PBF

LTC3407EMSE-4#PBF is a dual, constant frequency, synchronous step down DC/DC converter. Intended for low power applications, it operates from 2.5V to 5.5V input voltage range and has a constant 2.25MHz switching frequency, allowing the use of tiny, low cost capacitors and inductors with a profile ≤1mm. Each output voltage is adjustable from 0.6V to 5V. Internal synchronous 0.35 ohm, 1.2A power switches provide high efficiency without the need for external Schottky diodes. A user selectable mode input is provided to allow the user to trade-off noise ripple for low power efficiency. Burst Mode® operation provides high efficiency at light loads, while pulse-skipping mode provides low noise ripple at light loads. Applications include PDAs/palmtop PCs, digital cameras, cellular phones, portable media players, PC cards, wireless and DSL modems.

• Current mode operation for excellent line and load transient response
• Short-circuit protected, low dropout operation: 100% duty cycle
• Power-on reset output, externally synchronizable oscillator
• High efficiency up to 95%, no Schottky diodes required
• Shutdown input DC supply current is 0.1μA typical at (RUN = 0V, VIN = 5.5V, MODE/SYNC = 0V)
• Oscillator frequency is 2.25MHz typical at (VFBX = 0.6V, TA = 25°C)
• Peak switch current Limit is 1.2A typical at (VIN = 3V, VFBX = 0.5V, duty cycle <35%)
• Switch leakage current is 1μA maximum at (VIN = 5V, VRUN = 0V, VFBX = 0V)
• Top switch on-resistance is 0.35 ohm typical at (TA = 25°C)
• Ambient temperature range from -40°C to 85°C, 10-lead plastic MSOP package

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