Overview
The LT1963AEQ-2.5#PBF is a low dropout (LDO) voltage regulator produced by Analog Devices Inc. This device is part of the LT1963A series, which is optimized for fast transient response and low noise, making it suitable for a variety of applications, including sensitive RF supply and automotive systems.
The regulator 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 device is available in a 5-lead plastic DD-Pak package and operates over a temperature range of –40°C to 125°C.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Output Current | 1.5 | A | |||
| Dropout Voltage | ILOAD = 1.5A | 0.34 | 0.45 | 0.55 | V |
| Quiescent Current | 1 | mA | |||
| Quiescent Current in Shutdown | <1 | µA | |||
| Regulated Output Voltage | VIN = 3V, ILOAD = 1mA | 2.462 | 2.5 | 2.538 | V |
| Line Regulation | ∆VIN = 3V to 20V, ILOAD = 1mA | 2 | 3 | 5 | mV |
| Load Regulation | VIN = 3.5V, ∆ILOAD = 1mA to 1.5A | 2.5 | 15 | 30 | mV |
| Minimum Input Voltage | ILOAD = 1.5A | 1.9 | 2.1 | 2.5 | V |
| Operating Temperature Range | –40 | 125 | °C |
Key Features
- Optimized for fast transient response
- Output current: 1.5A
- Dropout voltage: 340mV
- Low noise: 40µVRMS (10Hz to 100kHz)
- Quiescent current: 1mA, <1µA in shutdown
- No protection diodes needed
- Controlled quiescent current in dropout
- Fixed output voltages: 1.5V, 1.8V, 2.5V, 3.3V; adjustable output from 1.21V to 20V
- Stable with 10µF output capacitor and ceramic capacitors
- Reverse battery protection, current limiting, thermal limiting, and reverse current protection
- AEC-Q100 qualified for automotive applications
Applications
- 3.3V to 2.5V logic power supplies
- Post regulator for switching supplies
- Sensitive RF supply applications
- Automotive systems (AEC-Q100 qualified)
- General-purpose low dropout voltage regulation
Q & A
- What is the maximum output current of the LT1963AEQ-2.5#PBF?
The maximum output current is 1.5A.
- What is the dropout voltage of the LT1963AEQ-2.5#PBF?
The dropout voltage is 340mV.
- What is the quiescent current of the LT1963AEQ-2.5#PBF in normal operation and in shutdown?
The quiescent current is 1mA in normal operation and less than 1µA in shutdown.
- What are the available fixed output voltages for the LT1963A series?
The fixed output voltages are 1.5V, 1.8V, 2.5V, and 3.3V.
- What is the adjustable output voltage range for the LT1963A series?
The adjustable output voltage range is from 1.21V to 20V.
- Is the LT1963AEQ-2.5#PBF stable with ceramic capacitors?
Yes, it is stable with ceramic capacitors as well as with 10µF output capacitors.
- What kind of protection features does the LT1963AEQ-2.5#PBF have?
The device includes reverse battery protection, current limiting, thermal limiting, and reverse current protection.
- What is the operating temperature range of the LT1963AEQ-2.5#PBF?
The operating temperature range is –40°C to 125°C.
- Is the LT1963AEQ-2.5#PBF qualified for automotive applications?
Yes, it is AEC-Q100 qualified for automotive applications.
- What package types are available for the LT1963A series?
The devices are available in 5-lead TO-220, DD, 3-lead SOT-223, 8-lead SO, and 16-lead TSSOP packages.
