Overview
The LT1764AEQ-2.5#PBF is a low noise/dropout regulator produced by Analog Devices Inc., optimized for fast transient response. This regulator is designed to provide a fixed output voltage of 2.5V with a maximum output current of 3A. It is particularly suited for applications requiring low output voltage noise, making it ideal for sensitive RF supply applications. The device features well-controlled quiescent current that does not rise in dropout, unlike many other regulators. Internal protection circuitry includes reverse battery protection, current limiting, thermal limiting, and reverse current protection.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Fixed Output Voltage | 2.5V | |
| Maximum Output Current | 3A | |
| Dropout Voltage | 0.34V | ILOAD = 3A, TA = 25°C |
| Output Voltage Noise | 40µVRMS | COUT = 10µF, ILOAD = 3A, BW = 10Hz to 100kHz |
| Quiescent Current in Shutdown | 1µA | VIN = 6V, V active-low SHDN = 0V |
| Current Limit | 4A typical | VIN = 7V, VOUT = 0V, TA = 25°C |
| Package Type | TO-263 (D2PAK), 5-lead plastic DD package | |
| Operating Junction Temperature Range | –40°C to 125°C |
Key Features
- Fast transient response and low output voltage noise, making it ideal for sensitive RF supply applications.
- Well-controlled quiescent current that does not rise in dropout.
- Internal protection circuitry including reverse battery protection, current limiting, thermal limiting, and reverse current protection.
- No protection diodes needed.
- Surface mount, 5-pin TO-263 (D2PAK) package.
- Operating junction temperature range from –40°C to 125°C.
Applications
- 3.3V to 2.5V logic power supply.
- Post regulator for switching supplies.
- Sensitive RF supply applications.
Q & A
- What is the fixed output voltage of the LT1764AEQ-2.5#PBF?
The fixed output voltage is 2.5V.
- What is the maximum output current of the LT1764AEQ-2.5#PBF?
The maximum output current is 3A.
- What is the dropout voltage at 3A load current?
The dropout voltage is 0.34V at ILOAD = 3A, TA = 25°C.
- What is the output voltage noise of the LT1764AEQ-2.5#PBF?
The output voltage noise is 40µVRMS (COUT = 10µF, ILOAD = 3A, BW = 10Hz to 100kHz).
- What is the quiescent current in shutdown mode?
The quiescent current in shutdown is 1µA at VIN = 6V, V active-low SHDN = 0V.
- What is the current limit of the LT1764AEQ-2.5#PBF?
The current limit is 4A typical at VIN = 7V, VOUT = 0V, TA = 25°C.
- What type of package does the LT1764AEQ-2.5#PBF come in?
The device comes in a 5-lead plastic DD package, TO-263 (D2PAK).
- What is the operating junction temperature range of the LT1764AEQ-2.5#PBF?
The operating junction temperature range is from –40°C to 125°C.
- Does the LT1764AEQ-2.5#PBF require external protection diodes?
No, the device does not require external protection diodes.
- What are some typical applications of the LT1764AEQ-2.5#PBF?
Typical applications include 3.3V to 2.5V logic power supply and post regulator for switching supplies, as well as sensitive RF supply applications.
