Overview
The LT1963EQ-3.3#PBF is a low dropout (LDO) linear regulator produced by Analog Devices Inc. This regulator is optimized for fast transient response and is capable of supplying up to 1.5A of output current. It features a low dropout voltage of 340mV, making it suitable for a wide range of applications requiring stable and efficient power supply. The device is available in a 5-lead DD-Pak package and operates over a temperature range of –40°C to 125°C.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Output Current | - | - | 1.5 | A |
| Dropout Voltage | - | - | 0.34 | V |
| Quiescent Current | - | 1 | - | mA |
| Quiescent Current in Shutdown | - | - | <1 | µA |
| Output Voltage | - | 3.3 | - | V |
| Minimum Input Voltage | 1.9 | - | - | V |
| Output Noise (10Hz to 100kHz) | - | 40 | - | µVRMS |
| Operating Temperature Range | -40 | - | 125 | °C |
| Package Type | - | - | 5-lead DD-Pak | - |
Key Features
- Low dropout voltage of 340mV
- Fast transient response
- Low output noise: 40µVRMS (10Hz to 100kHz)
- Stable with output capacitors as low as 10µF
- Internal protection circuitry includes reverse battery protection, current limiting, thermal limiting, and reverse current protection
- No protection diodes needed
- Controlled quiescent current in dropout
- Adjustable output from 1.21V to 20V (for adjustable version)
Applications
- Post-regulator for switching supplies
- 3.3V to 2.5V logic power supplies
- Sensitive RF supply applications due to low noise
- General-purpose power supply applications requiring high current and low dropout voltage
Q & A
- What is the maximum output current of the LT1963EQ-3.3#PBF? The maximum output current is 1.5A.
- What is the dropout voltage of the LT1963EQ-3.3#PBF? The dropout voltage is 340mV.
- What is the quiescent current of the LT1963EQ-3.3#PBF in normal operation? The quiescent current is 1mA.
- What is the quiescent current in shutdown mode? The quiescent current in shutdown is less than 1µA.
- What is the output voltage of the LT1963EQ-3.3#PBF? The output voltage is 3.3V.
- What is the minimum input voltage required for the LT1963EQ-3.3#PBF? The minimum input voltage is 1.9V for ILOAD = 0.5A.
- Is the LT1963EQ-3.3#PBF stable with ceramic capacitors? Yes, it is stable with ceramic capacitors.
- What are the internal protection features of the LT1963EQ-3.3#PBF? The internal protection features include reverse battery protection, current limiting, thermal limiting, and reverse current protection.
- What is the operating temperature range of the LT1963EQ-3.3#PBF? The operating temperature range is –40°C to 125°C.
- In what package is the LT1963EQ-3.3#PBF available? The device is available in a 5-lead DD-Pak package.
