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LTC1876 Hoja de datos

Número de piezacomponentes DescripciónFabricante
LTC1876 High Efficiency, 2-Phase, Dual Synchronous Step-Down Switching Controller and Step-Up Regulator Linear
Linear Technology Linear
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DESCRIPTION
The LTC®1876 is a high performance triple output switching regulator. It incorporates a dual step-down switching controller that drives all N-channelsynchronous power MOSFET stages. A step-up regulator with an internal 1A, 36V switch provides the third output.

FEATURES
Step-Down Controller
■ Out-of-Phase Controllers Reduce Required Input Capacitance and Power Supply Induced Noise
■ Power Good Output Voltage Indicator
■ OPTI-LOOPTM Compensation Minimizes COUT
■ DC Programmed Fixed Frequency 150kHz to 300kHz
■ Wide VIN Range: 3.5V to 36V Operation
■ Very Low Dropout Operation: 99% Duty Cycle
■ Adjustable Soft-Start Current Ramping
■ Latched Short-Circuit Shutdown with Defeat Option
■ Remote Output Voltage Sense and OV Protection
■ 5V and 3.3V Standby Regulators
■ Selectable Const. Freq. or Burst ModeTM Operation

Step-Up Regulator
■ High Operating Switching Frequency of 1.2MHz
■ Low Internal VCESAT Switch: 400mV @ 1A, VIN = 3V
■ Wide VIN Range: 2.6V to 16V Operation
■ High Output Voltage: Up to 34V

APPLICATIONS
■ 3.3V Input Step-Down Converter
■ Notebook and Palmtop Computers, PDAs
■ Battery-Operated Digital Devices

 

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