LT1764EQ 3A LDO Linear Voltage Regulator with 340mV Dropout and 40 µVRMS Low Noise
Specifications
Manufacturer:
Analog Devices Inc.
Product Number:
LT1764EQ
Description:
IC REG LINEAR POS ADJ 3A DDPAK-5
Highlight:
3A continuous output current LDO Linear Voltage Regulator
,340mV dropout voltage LT1764EQ
,40 µVRMS output noise 3A LDO Regulator
Introduction
LT1764EQ 3A Low-Dropout Linear Voltage Regulator
The LT1764EQ from Analog Devices (formerly Linear Technology) is a high-performance 3A linear voltage regulator featuring fast transient response, ultra-low noise, and comprehensive protection features.
Core Functions
High-Current LDO Regulation
- Delivers up to 3A continuous output current
- Ultra-low dropout voltage: 340mV at full load
- Input voltage range: 2.7V to 20V
- Output voltage: Available in fixed versions (1.5V, 1.8V, 2.5V, 3.3V) and adjustable version (1.21V to 20V)
Fast Transient Response
- Optimized control loop for rapid recovery from load steps
- Ideal for dynamic loads including FPGAs and microprocessors
- Stable with small output capacitors as low as 10 µF
Ultra-Low Noise & High PSRR
- Output noise: 40 µVRMS (10Hz to 100kHz)
- High power supply rejection ratio (PSRR)
- Suitable for noise-sensitive RF and analog circuits
Low Power & Shutdown Mode
- Quiescent current: 1mA (typical)
- Shutdown mode: <1 µA quiescent current (controlled by SHDN pin)
- Quiescent current remains stable in dropout conditions
Comprehensive Protection
- Reverse battery protection
- Overcurrent limiting
- Thermal shutdown protection
- Reverse current protection (no external diodes needed)
Package & Pin Configuration
- Package: 5-lead DDPAK (TO-263-5) (EQ package)
- Key pins: VIN (input), VOUT (output), GND (ground), SHDN (shutdown control), FB (feedback)
- Operating junction temperature: -40°C to +125°C
Typical Applications
High-Performance Digital Systems
FPGA, DSP, and microprocessor core power supplies; high-speed logic (3.3V, 2.5V, 1.8V) power regulation
RF & Analog Circuits
Low-noise power for RF transceivers, mixers, and VCOs; precision analog front-ends, sensor interfaces, and data acquisition systems
Post-Regulation for Switching Power Supplies
Cleanup switching regulator outputs to reduce ripple and noise; point-of-load (POL) regulation in distributed power systems
Portable & Battery-Powered Devices
High-current battery-powered equipment including industrial handhelds and test instruments; low-dropout operation extends battery life
Industrial & Automotive Electronics
Industrial control systems and factory automation; automotive infotainment and sensor power with extended temperature range
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