ADP1764ACPZ-1.1-R7

LDO Regulator Pos 1.1V 4A 16Pin LFCSP EP T/R

Product Details

The ADP1764 is a low noise, low dropout LDO linear regulator. It is designed to operate from a single input supply with an input voltage as low as 1.10 V without the requirement of an external bias supply to increase efficiency and provide up to 4 A of output current IOUT.

The low 47 mV typical dropout voltage at a 4 A load allows the ADP1764 to operate with a small headroom while maintaining regulation and providing better efficiency.

The ADP1764 is optimized for stable operation with small 22 μF ceramic output capacitors. The ADP1764 delivers optimal transient performance with minimal printed circuit board PCB area.

The ADP1764 is available in fixed output voltages ranging from 0.55 V to 1.5 V. The output voltage VOUT of the adjustable output model can be set from 0.5 V to 1.5 V through an external resistor connected between VADJ and ground.

The ADP1764 has an externally programmable soft start time by connecting a capacitor to the SS pin. Short-circuit and thermal overload protection circuits prevent damage in adverse conditions. The ADP1764 is available in a small, 16-lead LFCSP package for the smallest footprint solution to meet a variety of applications.

**Applications**

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Regulation to noise sensitive applications such as radio frequency RF transceivers, analog-to-digital converter ADC and digital-to-analog converter DAC circuits, phase-locked loops PLLs, voltage controlled oscillators VCOs and clocking integrated circuits

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Field-programmable gate array FPGA and digital signal processor DSP supplies

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Medical and healthcare

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Industrial and instrumentation

### Features and Benefits

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4 A maximum output current

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Low input voltage supply range

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VIN = 1.10 V to 1.98 V, no external bias supply required

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Fixed output voltage range VOUT_FIXED: 0.55 V to 1.5 V

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Adjustable output voltage range VOUT_ADJ: 0.5 V to 1.5 V

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Ultralow noise: 2 µV rms, 100 Hz to 100 kHz

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Noise spectral density: 5 nV/√Hz at 10 kHz; 4 nV/√Hz at 100 kHz

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Low dropout voltage: 47 mV typical at 4 A load

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Operating supply current: 5 mA typical at no load 

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±1.5% fixed output voltage accuracy over line, load, and temperature

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Excellent power supply rejection ratio PSRR performance

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69 dB typical at 10 kHz at 4 A load

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46 dB typical at 100 kHz at 4 A load 

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Excellent load/line transient response

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Soft start to reduce inrush current

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Optimized for small 22 µF ceramic capacitors

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Current-limit and thermal overload protection

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Power-good indicator

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Precision enable

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16-lead, 3 mm × 3 mm LFCSP package