The LT1764AMPQ#PBF is a high-performance 3A low dropout linear regulator manufactured by Analog Devices, providing an adjustable output voltage for noise-sensitive and power-dense designs. This device delivers a typical dropout voltage of only 340 mV at full load, allowing efficient regulation with minimal input-to-output headroom. Its adjustable output spans from 1.21 V to 20 V and is supported by low output noise and fast transient response, characteristics that are critical for maintaining signal integrity in precision analog and radio frequency circuits. Housed in a TO-263 (DDPAK) package, the regulator uses a large exposed thermal pad to enhance heat dissipation, aiding reliable operation in compact, high-current board layouts.
Typical deployments include post-regulation after switching converters, power conditioning for instrumentation, and power management in industrial automation, aerospace, and defense systems where stable, low-noise rails are non-negotiable. The MP suffix identifies a high-reliability plastic grade rated for the full –55°C to +125°C operating temperature range, making it suitable for harsh-environment applications that demand extended temperature performance without the procurement complexity of hermetic military packages. This part is commonly referenced for defense and avionics programs where industrial-grade components fall short but full MIL-STD-883 screening is not required. The lead‑free finish (#PBF) ensures RoHS compliance, and Analog Devices’ sustained support for this mature LDO family helps mitigate obsolescence risks in long-lifecycle programs.
| Attribute | Value |
|---|---|
| Output Configuration | Positive |
| Output Type | Adjustable |
| Number of Regulators | 1 |
| Voltage - Input (Max) | 20V |
| Voltage - Output (Min/Fixed) | 1.21V |
| Voltage - Output (Max) | 20V |
| Voltage Dropout (Max) | 0.66V @ 3A |
| Current - Output | 3A |
| Current - Quiescent (Iq) | 1.5 mA |
| Current - Supply (Max) | 200 mA |
| PSRR | 63dB (120Hz) |
| Control Features | Enable |
| Protection Features | Over Current, Over Temperature, Reverse Polarity |
| Operating Temperature | -55°C ~ 125°C |
| Mounting Type | Surface Mount |
| Package / Case | TO-263-6, D2PAK (5 Leads + Tab), TO-263BA |
| Supplier Device Package | DDPAK-5 |
Download the current available datasheet for LT1764AMPQ#PBF.
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