The ADP1764ACPZ0.85-R7 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 theADP1764ACPZ0.85-R7 to operate with a small headroom while maintainingregulation and providing better efficiency.
The ADP1764ACPZ0.85-R7 is optimized for stable operation with small 22 μF ceramic output capacitors. The ADP1764ACPZ0.85-R7 delivers optimal transientperformance with minimal printed circuit board (PCB) area.
The ADP1764ACPZ0.85-R7 is available in fixed output voltages ranging from 0.55 V to 1.5 V. The output voltage (VOUT) of the adjustableoutput model can be set from 0.5 V to 1.5 V through an external resistor connected between VADJ and ground.
The ADP1764ACPZ0.85-R7 has an externally programmable soft start time by connecting a capacitor to the SS pin. Short-circuit and thermaloverload protection circuits prevent damage in adverse conditions.The ADP1764ACPZ0.85-R7 is available in a small, 16-lead LFCSP package forthe smallest footprint solution to meet a variety of applications.
Feature
- 4 A maximum output current
- Low input voltage supply range
- VIN = 1.10 V to 1.98 V, no external bias supply required
- Fixed output voltage range (VOUT_FIXED): 0.55 V to 1.5 V
- Adjustable output voltage range (VOUT_ADJ): 0.5 V to 1.5 V
- Ultralow noise: 2 µV rms, 100 Hz to 100 kHz
- Noise spectral density: 5 nV/√Hz at 10 kHz; 4 nV/√Hz at 100 kHz
- Low dropout voltage: 47 mV typical at 4 A load
- Operating supply current: 5 mA typical at no load
- ±1.5% fixed output voltage accuracy over line, load, and temperature
- Excellent power supply rejection ratio (PSRR) performance
- 69 dB typical at 10 kHz at 4 A load
- 46 dB typical at 100 kHz at 4 A load
- Excellent load/line transient response
- Soft start to reduce inrush current
- Optimized for small 22 µF ceramic capacitors
- Current-limit and thermal overload protection
- Power-good indicator
- Precision enable
- 16-lead, 3 mm × 3 mm LFCSP package
Applications
- 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
- Field-programmable gate array (FPGA) and digital signal processor (DSP) supplies
- Medical and healthcare
- Industrial and instrumentation
(Picture: Pinout)
