3 A, Low V , Low Noise, IN CMOS Linear Regulator Data Sheet ADP1763 FEATURES TYPICAL APPLICATION CIRCUITS 3 A maximum output current ADP1763 V = 1.5V V = 1.8V IN OUT VIN VOUT Low input voltage supply range C C IN OUT 10F 10F V = 1.10 V to 1.98 V, no external bias supply required IN SENSE R ON Fixed output voltage range: V = 0.9 V to 1.5 V PULL-UP OUT FIXED 100k EN OFF PG PG Adjustable output voltage range: V = 0.5 V to 1.5 V OUT ADJ SS VADJ Ultralow noise: 2 V rms, 100 Hz to 100 kHz Noise spectral density C SS VREG REFCAP 10nF C C REF REG GND 4 nV/Hz at 10 kHz 1F 1F 3 nV/Hz at 100 kHz Low dropout voltage: 95 mV typical at 3 A load Figure 1. Fixed Output Operation Operating supply current: 4.5 mA typical at no load ADP1763 1.5% fixed output voltage accuracy over line, load, and V = 1.8V V = 1.5V IN OUT VIN VOUT C C temperature IN OUT 10F 10F SENSE Excellent power supply rejection ratio (PSRR) performance R ON PULL-UP 59 dB typical at 10 kHz at 3 A load 100k EN OFF PG PG 43 dB typical at 100 kHz at 3 A load SS VADJ Excellent load/line transient response C R SS VREG REFCAP ADJ Soft start to reduce inrush current 10nF 10k C C REF REG GND 1F Optimized for small 10 F ceramic capacitors 1F Current-limit and thermal overload protection Figure 2. Adjustable Output Operation Power-good indicator Precision enable Table 1. Related Devices 16-lead, 3 mm 3 mm LFCSP package Input Maximum Fixed/ Device Voltage Current Adjustable Package APPLICATIONS ADP1761 1.10 V to 1 A Fixed/adjustable 16-lead Regulation to noise sensitive applications such as radio 1.98 V LFCSP frequency (RF) transceivers, analog-to-digital converter ADP1762 1.10 V to 2 A Fixed/adjustable 16-lead (ADC) and digital-to-analog converter (DAC) circuits, 1.98 V LFCSP phase-locked loops (PLLs), voltage controlled oscillators ADP1740/ 1.6 V to 2 A Fixed/adjustable 16-lead (VCOs) and clocking integrated circuits ADP1741 3.6 V LFCSP Field-programmable gate array (FPGA) and digital signal ADP1752/ 1.6 V to 0.8 A Fixed/adjustable 16-lead processor (DSP) supplies ADP1753 3.6 V LFCSP Medical and healthcare ADP1754/ 1.6 V to 1.2 A Fixed/adjustable 16-lead ADP1755 3.6 V LFCSP Industrial and instrumentation The ADP1763 is available in fixed output voltages ranging from GENERAL DESCRIPTION 0.9 V to 1.5 V. The output of the adjustable output model can The ADP1763 is a low noise, low dropout (LDO) linear regulator. be set from 0.5 V to 1.5 V through an external resistor connected It is designed to operate from a single input supply with an input between VADJ and ground. voltage as low as 1.10 V without the requirement of an external bias supply to increase efficiency and provide up to 3 A of output The ADP1763 has an externally programmable soft start time by current. connecting a capacitor to the SS pin. Short-circuit and thermal The low 95 mV typical dropout voltage at a 3 A load allows the overload protection circuits prevent damage in adverse conditions. ADP1763 to operate with a small headroom while maintaining The ADP1763 is available in a small 16-lead LFCSP package for regulation and providing better efficiency. the smallest footprint solution to meet a variety of applications. The ADP1763 is optimized for stable operation with small 10 F ceramic output capacitors. The ADP1763 delivers optimal transient performance with minimal board area. Rev. D Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. Tel: 781.329.4700 20162020 Analog Devices, Inc. All rights reserved. No license is granted by implication or otherwise under any patent or patent rights of Analog Technical Support www.analog.com Devices. Trademarks and registered trademarks are the property of their respective owners. 12923-001 12923-002ADP1763 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Soft Start Function ..................................................................... 11 Applications ...................................................................................... 1 Adjustable Output Voltage ....................................................... 12 General Description ......................................................................... 1 Enable Feature ............................................................................ 12 Typical Application Circuits ........................................................... 1 Power-Good (PG) Feature ........................................................ 12 Revision History ............................................................................... 2 Applications Information ............................................................. 14 Specifications .................................................................................... 3 Capacitor Selection .................................................................... 14 Input and Output Capacitor: Recommended Specifications . 4 Undervoltage Lockout ............................................................... 15 Absolute Maximum Ratings ........................................................... 5 Current-Limit and Thermal Overload Protection ................ 15 Thermal Data ................................................................................ 5 Paralleling ADP1763 for High Current Applications ........... 15 Thermal Resistance/Parameter .................................................. 5 Thermal Considerations ........................................................... 16 ESD Caution.................................................................................. 5 PCB Layout Considerations ..................................................... 18 Pin Configuration and Function Descriptions ............................ 6 Outline Dimensions ....................................................................... 19 Typical Performance Characteristics ............................................. 7 Ordering Guide .......................................................................... 19 Theory of Operation ...................................................................... 11 REVISION HISTORY 3/2020Rev. C to Rev. D 5/2017Rev. A to Rev. B Changes to Thermal Data Section, Thermal Change to Figure 19 Caption, Figure 20 Caption, and Resistance/Parameter Section, and Table 5 .................................. 5 Figure 21 Caption .............................................................................. 9 Change to Figure 22 Caption ........................................................ 10 9/2017Rev. B to Rev. C Updated Outline Dimensions ...................................................... 18 Change to Thermal Considerations Section ............................... 17 9/2016Rev. 0 to Rev. A Changes to Figure 23 and Figure 24 ............................................ 11 4/2016Revision 0: Initial Version Rev. D Page 2 of 19