LTC3252

` 2.7V to 5.5V Input Voltage Range
` No Inductors
` Typical Efficiency 50% Higher than LDOs
` Spread Spectrum Operation
` Low Input and Output Noise
` Shutdown Disconnects Load from V_IN
` Dual Adjustable Independent Outputs (Range: 0.9V to 1.6V)
` Output Current: 250mA Each Output
` Low Operating Current: I<sub>IN</sub> = 60A Typ (35mA with One Output Enabled)
` Low Shutdown Current: I_IN = 0.01A Typ
` Soft-Start Limits Inrush Current at Turn On
` Short Circuit and Over Temperature Protected
` Available in 4mm ´ 3mm 12-Pin DFN Package

V_IN to GND ................................................0.3V to 6.0V
EN1, EN2, FB1, FB2 to GND .......... 0.3V to (V_IN + 0.3V)
I_OUT1, I_OUT2 (Note 3) ........................................ 400mA
Operating Ambient Temperature Range
(Note 2) .............................................. 40°C to 85°C
Storage Temperature Range ............ 65°C to 125°C
Lead Temperature (Soldering, 10 sec)............... 300°C

The LTC^®3252 is a switched capacitor step-down DC/DC converter that produces two adjustable regulated outputs from a single 2.7V to 5.5V input. The part uses switched capacitor fractional conversion to achieve a typical efficiency increase of 50% over that of a linear regulator. No inductors are required.

A unique constant frequency, spread spectrum architecture provides a very low noise regulated output as well as low noise at the input. The part also has Burst Mode^® operation to provide high efficiency at low output currents,as well as ultralow current shutdown.

Low operating currents (60A with both outputs enabled, 35mA with one output enabled) and low external parts count make the LTC3252 ideally suited for space-constrained battery-powered applications. The part is shortcircuit and overtemperature protected and is available in a tiny 4mm ´ 3mm 12-pin DFN package.