Datasheet ADP1763 (Analog Devices)

3 A, Low VIN, Low Noise, CMOS Linear Regulator Data Sheet ADP1763 FEATURES TYPICAL APPLICATION CIRCUITS 3 A maximum output current ADP1763 V V IN = 1.8V OUT = 1.5V Low input voltage supply range VIN VOUT C C IN OUT V 10µF 10µF IN = 1.10 V to 1.98 V, no external bias supply required SENSE Fixed output voltage range: V R OUT_FIXED = 0.9 V to 1.5 V PULL-UP ON 100kΩ EN Adjustable output voltage range: V OFF OUT_ADJ = 0.5 V to 1.5 V PG PG Ultralow noise: 2 μV rms, 100 Hz to 100 kHz SS VADJ Noise spectral density CSS VREG REFCAP 10nF 4 nV/√Hz at 10 kHz C C REG GND REF
001 3-
1µF 1µF 3 nV/√Hz at 100 kHz
1292
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 ±1.5% fixed output voltage accuracy over line, load, and ADP1763 V V IN = 1.8V OUT = 1.5V VIN VOUT temperature C C IN OUT 10µF 10µF Excellent power supply rejection ratio (PSRR) performance SENSE R 59 dB typical at 10 kHz at 3 A load PULL-UP ON 100kΩ EN OFF 43 dB typical at 100 kHz at 3 A load PG PG SS VADJ Excellent load/line transient response C Soft start to reduce inrush current SS VREG REFCAP RADJ 10nF C C 10kΩ REG REF Optimized for small 10 μF ceramic capacitors GND
002
1µF 1µF
23-
Current-limit and thermal overload protection
129 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
Industrial and instrumentation
ADP1755 3.6 V LFCSP
GENERAL DESCRIPTION
The ADP1763 is available in fixed output voltages ranging from The ADP1763 is a low noise, low dropout (LDO) linear regulator. 0.9 V to 1.5 V. The output of the adjustable output model can It is designed to operate from a single input supply with an input be set from 0.5 V to 1.5 V through an external resistor connected voltage as low as 1.10 V without the requirement of an external between VADJ and ground. 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 μF ceramic output capacitors. The ADP1763 delivers optimal transient performance with minimal board area.
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Document Outline Features Applications General Description Typical Application Circuits Revision History Specifications Input and Output Capacitor: Recommended Specifications Absolute Maximum Ratings Thermal Data Thermal Resistance/Parameter ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Theory of Operation Soft Start Function Adjustable Output Voltage Enable Feature Power-Good (PG) Feature Applications Information Capacitor Selection Output Capacitor Input Bypass Capacitor Input and Output Capacitor Properties Undervoltage Lockout Current-Limit and Thermal Overload Protection Paralleling ADP1763 for High Current Applications Thermal Considerations PCB Layout Considerations Outline Dimensions Ordering Guide