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车规 ET551XX
General Description
The ET551XX series are CMOS-based low-dropout, low-power linear regulators, offering 800mA with NMOS pass transistor and a separate bias supply voltage (VBIAS) . The device provides very stable, accurate output voltage with low noise, high ripple rejection and low supply current suitable for space constrained, noise sensitive application. The ET551XX series consist of an accurate voltage-reference block, an error amplifier, a thermal-shutdown circuit, and a current limit circuit.
The ET551XX series are available in the DFN4(1.2mm×1.2mm) or DFN6(1.2mm×1.2mm) package.
Features
Wide VIN Input Voltage Range: 0.8V to 5.5V
Wide VBIAS Voltage Range: 2.4V to 5.5V
Output Voltage Range:
-----0.8V to 2.1V (Fixed)
-----0.8V to 3.6V (Externally set)
Very Low VBIAS Input Current of Typ. 80µA
Ultra Low Dropout: Typ. 200mV at 800mA, 1.1V Output, 3.3V Bias
Built-in Over Current Protection and Thermal Shutdown Circuit
Built-in Auto-discharging Circuit (optional)
Built-in Under Voltage Lock-out
Stable with a 2.2μF Ceramic Capacitor
Package: DFN4(1.2mm × 1.2mm × 0.4mm) or DFN6(1.2mm × 1.2mm × 0.4mm)
MSL: Level1
Applications
Constant-voltage power supply for battery-powered device
Constant-voltage power supply for smartphones, tablets
Constant-voltage power supply for cameras, DVRs, STB and camcorders
Pin Configuration
Block Diagram
Application Circuits
