Overview
The LT1963AEQ-1.8#TRPBF 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 operation. It is designed to supply up to 1.5A of output current and is available in various fixed output voltages, including 1.8V in this specific model.
The regulator features a dropout voltage of 340mV, making it suitable for applications where a low voltage drop is crucial. It also boasts a quiescent current of 1mA and less than 1µA in shutdown mode, contributing to power efficiency.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Output Voltage | VIN = 2.3V, ILOAD = 1mA 2.8V < VIN < 20V, 1mA < ILOAD < 1.5A | 1.773 | 1.800 | 1.827 | V |
| Dropout Voltage | ILOAD = 1.5A | - | 340 | - | mV |
| Quiescent Current | ILOAD = 1mA | - | 1 | - | mA |
| Quiescent Current in Shutdown | VIN = 6V, VSHDN = 0V | 0.01 | - | 1 | µA |
| Ripple Rejection | VIN – VOUT = 1.5V (Avg), VRIPPLE = 0.5VP-P, fRIPPLE = 120Hz, ILOAD = 0.75A | 55 | 63 | - | dB |
| Input Voltage Range | - | - | - | ±20 | V |
| Operating Temperature Range | - | -40 | - | 125 | °C |
| Output Current | - | - | - | 1.5 | A |
Key Features
- Optimized for fast transient response
- Output current: up to 1.5A
- Low noise: 40µVRMS (10Hz to 100kHz)
- Dropout voltage: 340mV
- Quiescent current: 1mA, <1µA in shutdown
- Fixed output voltage: 1.8V (in this model), also available in 1.5V, 2.5V, 3.3V, and adjustable from 1.21V to 20V
- No protection diodes needed
- Controlled quiescent current in dropout
- Stable with 10µF output capacitor and ceramic capacitors
- Reverse battery protection and no reverse current
- Thermal limiting
- AEC-Q100 qualified for automotive applications
Applications
- Automotive systems: The LT1963AEQ-1.8#TRPBF is AEC-Q100 qualified, making it suitable for use in automotive applications.
- Industrial power supplies: Its fast transient response and low noise make it ideal for industrial power supply systems.
- Telecommunications: Used in telecom equipment due to its stability and low dropout voltage.
- Medical devices: Suitable for medical devices requiring stable and low-noise power supply.
- Consumer electronics: Used in various consumer electronic devices that require efficient and stable voltage regulation.
Q & A
- What is the maximum output current of the LT1963AEQ-1.8#TRPBF?
The maximum output current is 1.5A.
- What is the dropout voltage of the LT1963AEQ-1.8#TRPBF?
The dropout voltage is 340mV.
- What are the available fixed output voltages for the LT1963A series?
The fixed output voltages available are 1.5V, 1.8V, 2.5V, and 3.3V.
- Is the LT1963AEQ-1.8#TRPBF suitable for automotive applications?
Yes, it is AEC-Q100 qualified for automotive applications.
- What is the quiescent current of the LT1963AEQ-1.8#TRPBF in normal operation and in shutdown mode?
The quiescent current is 1mA in normal operation and less than 1µA in shutdown mode.
- Does the LT1963AEQ-1.8#TRPBF require external protection diodes?
No, it does not require external protection diodes.
- What is the ripple rejection of the LT1963AEQ-1.8#TRPBF?
The ripple rejection is 55 to 63 dB.
- What are the stable output capacitor options for the LT1963AEQ-1.8#TRPBF?
The regulator is stable with 10µF output capacitors and ceramic capacitors.
- Does the LT1963AEQ-1.8#TRPBF have thermal limiting?
Yes, it has thermal limiting.
- What is the operating temperature range of the LT1963AEQ-1.8#TRPBF?
The operating temperature range is from -40°C to 125°C.
