特点
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
IN
= 60μA Typ (35μA with One Output Enabled)
Low Shutdown Current: I
IN
= 0.01μA Typ
Soft-Start Limits Inrush Current at Turn On
Short Circuit and Over Temperature Protected
Available in 4mm x 3mm 12-Pin DFN Package
典型应用
典型应用
描述
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 (60μA with both outputs enabled, 35μA 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 x 3mm 12-pin DFN package.