Overview
The LT1963AEQ-3.3#TRPBF is a low dropout (LDO) voltage regulator produced by Analog Devices Inc. This regulator is optimized for fast transient response and is suitable for a wide range of applications, including sensitive RF supply needs. The device is capable of supplying up to 1.5A of output current with a dropout voltage of 340mV. It features a low quiescent current of 1mA, which drops to less than 1µA in shutdown mode. The regulator is available in various fixed output voltages (1.5V, 1.8V, 2.5V, 3.3V) and an adjustable output from 1.21V to 20V.
Key Specifications
| Parameter | Typical Value | Units |
|---|---|---|
| Output Current | 1.5A | A |
| Dropout Voltage | 340mV | mV |
| Quiescent Current | 1mA | mA |
| Quiescent Current in Shutdown | <1µA | µA |
| Output Voltage Range | 1.21V to 20V | V |
| Minimum Input Voltage | 1.9V to 2.5V (depending on load) | V |
| Output Noise | 40µVRMS (10Hz to 100kHz) | µVRMS |
| Ripple Rejection | 55 to 63 dB | dB |
| Operating Temperature Range | –40°C to 125°C | °C |
| Package Types | 5-Lead TO-220, DD, 3-Lead SOT-223, 8-Lead SO |
Key Features
- Optimized for fast transient response
- Low dropout voltage of 340mV
- Low quiescent current of 1mA, dropping to <1µA in shutdown
- Fixed output voltages: 1.5V, 1.8V, 2.5V, 3.3V and adjustable output from 1.21V to 20V
- Very low output noise (40µVRMS from 10Hz to 100kHz), ideal for sensitive RF supply applications
- Stable with output capacitors as low as 10µF and ceramic capacitors
- Internal protection circuitry includes reverse battery protection, current limiting, thermal limiting, and reverse current protection
- AEC-Q100 qualified for automotive applications
Applications
- Sensitive RF supply applications
- Automotive systems (AEC-Q100 qualified)
- Logic power supplies (e.g., 3.3V to 2.5V regulators)
- General-purpose power supply needs requiring low noise and fast transient response
Q & A
- What is the maximum output current of the LT1963AEQ-3.3#TRPBF?
The maximum output current is 1.5A.
- What is the dropout voltage of the LT1963AEQ-3.3#TRPBF?
The dropout voltage is 340mV.
- What is the quiescent current of the LT1963AEQ-3.3#TRPBF in normal operation and in shutdown mode?
The quiescent current is 1mA in normal operation and less than 1µA in shutdown mode.
- What is the output voltage range of the LT1963AEQ-3.3#TRPBF?
The output voltage range is from 1.21V to 20V.
- Is the LT1963AEQ-3.3#TRPBF stable with ceramic capacitors?
- What kind of internal protection does the LT1963AEQ-3.3#TRPBF have?
The regulator includes internal protection circuitry such as reverse battery protection, current limiting, thermal limiting, and reverse current protection.
- Is the LT1963AEQ-3.3#TRPBF suitable for automotive applications?
- What are the available package types for the LT1963AEQ-3.3#TRPBF?
The regulator is available in 5-Lead TO-220, DD, 3-Lead SOT-223, and 8-Lead SO packages.
- What is the operating temperature range of the LT1963AEQ-3.3#TRPBF?
The operating temperature range is from –40°C to 125°C.
- How much noise does the LT1963AEQ-3.3#TRPBF produce at the output?
The output noise is 40µVRMS from 10Hz to 100kHz.
