Overview
The LT1763CS8-3.3 is a micropower, low noise, low dropout linear regulator from Linear Technology, now part of Analog Devices. This regulator is designed to supply up to 500mA of output current with a dropout voltage of 300mV, making it suitable for battery-powered systems. The device features a low quiescent current of 30µA, which remains well-controlled even in dropout conditions, and it is stable with output capacitors as low as 3.3µF. The LT1763CS8-3.3 is available in an 8-lead SO package and offers fixed output voltage of 3.3V.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Minimum Operating Voltage | ILOAD = 500mA | 1.8 | - | 2.35 | V |
| Regulated Output Voltage | VIN = 2.3V, ILOAD = 1mA VIN = 2.8V to 20V, ILOAD = 1mA to 500mA | 3.267 | 3.3 | 3.333 | V |
| Dropout Voltage | ILOAD = 500mA | - | 300 | - | mV |
| Quiescent Current | VIN = 6V, VSHDN = VIN | - | 30 | - | µA |
| Output Noise (with 0.01µF bypass capacitor) | 10Hz to 100kHz bandwidth | - | 20 | - | µVRMS |
| Output Capacitor Stability | - | - | - | 3.3µF | - |
| Package Type | - | - | - | 8-Lead SO | - |
Key Features
- Low noise operation: 20µVRMS output noise with a 0.01µF bypass capacitor over a 10Hz to 100kHz bandwidth.
- Low dropout voltage: 300mV at 500mA output current.
- Low quiescent current: 30µA, well-controlled in dropout conditions.
- Stable with low output capacitors: Stable with capacitors as low as 3.3µF.
- Reverse battery protection and no reverse current.
- Overcurrent and overtemperature protection.
- No protection diodes needed.
- Fixed output voltage of 3.3V.
Applications
- Battery-powered systems.
- Cellular phones.
- Noise-sensitive instrumentation systems.
Q & A
- What is the maximum output current of the LT1763CS8-3.3?
The LT1763CS8-3.3 can supply up to 500mA of output current. - What is the dropout voltage of the LT1763CS8-3.3?
The dropout voltage is 300mV at 500mA output current. - What is the quiescent current of the LT1763CS8-3.3?
The quiescent current is 30µA. - How much output noise does the LT1763CS8-3.3 produce?
With a 0.01µF bypass capacitor, the output noise is 20µVRMS over a 10Hz to 100kHz bandwidth. - What type of output capacitors can be used with the LT1763CS8-3.3?
The device is stable with output capacitors as low as 3.3µF. - Does the LT1763CS8-3.3 require protection diodes?
No, protection diodes are not needed. - What are the key protection features of the LT1763CS8-3.3?
The device features reverse battery protection, no reverse current, overcurrent protection, and overtemperature protection. - In what package is the LT1763CS8-3.3 available?
The LT1763CS8-3.3 is available in an 8-lead SO package. - What are some typical applications of the LT1763CS8-3.3?
Typical applications include battery-powered systems, cellular phones, and noise-sensitive instrumentation systems. - What is the minimum operating voltage for the LT1763CS8-3.3?
The minimum operating voltage is 1.8V for ILOAD = 500mA.
