Overview
The ADP7104, produced by Analog Devices Inc., is a CMOS, low dropout linear regulator (LDO) designed to operate from an input voltage range of 3.3 V to 20 V and provide up to 500 mA of output current. This regulator is ideal for high-performance analog and mixed-signal circuits, offering high power supply rejection, low noise, and excellent line and load transient response. The ADP7104 is available in both fixed and adjustable output voltage versions, with the adjustable version allowing output voltages from 1.22 V to VIN - VDO via an external feedback divider.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Input Voltage Range | VIN | 3.3 | 20 | V | ||
| Maximum Output Current | IOUT | 500 | mA | |||
| Output Noise Voltage | VNOISE | 15 | μV rms | |||
| Power Supply Rejection Ratio (PSRR) | PSRR | 10 kHz, VOUT = 3.3 V | 60 | dB | ||
| Dropout Voltage | VDROPOUT | IOUT = 500 mA | 0.45 | V | ||
| Thermal Shutdown Threshold | TSSD | TJ rising | 150 | °C | ||
| Package Options | 8-lead LFCSP, 8-lead SOIC |
Key Features
- High input voltage range: 3.3 V to 20 V
- Low noise: 15 μV rms for fixed output versions
- High power supply rejection ratio (PSRR): 60 dB at 10 kHz, VOUT = 3.3 V
- Power-good indicator for monitoring output voltage health
- User-programmable precision undervoltage lockout (UVLO) function for sequencing multiple power supplies
- Compact packaging options: 8-lead LFCSP and 8-lead SOIC
- Excellent thermal performance with a small 1 μF ceramic output capacitor
Applications
- Noise-sensitive applications: ADC, DAC circuits, precision amplifiers, high-frequency oscillators, clocks, and PLLs
- Communications and infrastructure
- Medical and healthcare
- Industrial and instrumentation
Q & A
- What is the input voltage range of the ADP7104?
The input voltage range of the ADP7104 is from 3.3 V to 20 V. - What is the maximum output current of the ADP7104?
The maximum output current of the ADP7104 is up to 500 mA. - What is the output noise voltage of the ADP7104?
The output noise voltage of the ADP7104 is 15 μV rms. - What is the PSRR of the ADP7104 at 10 kHz?
The PSRR of the ADP7104 at 10 kHz is 60 dB. - Does the ADP7104 have a power-good indicator?
Yes, the ADP7104 includes a digital power-good output to monitor the health of the output voltage. - What are the package options for the ADP7104?
The ADP7104 is available in 8-lead LFCSP and 8-lead SOIC packages. - What is the thermal shutdown threshold of the ADP7104?
The thermal shutdown threshold of the ADP7104 is 150°C. - Can the ADP7104 be used in noise-sensitive applications?
Yes, the ADP7104 is suitable for noise-sensitive applications such as ADC, DAC circuits, and precision amplifiers. - Is the ADP7104 available in adjustable output voltage versions?
Yes, the ADP7104 is available in both fixed and adjustable output voltage versions. - What is the purpose of the undervoltage lockout (UVLO) function in the ADP7104?
The UVLO function in the ADP7104 allows for the sequencing of multiple power supplies and provides a user-programmable precision undervoltage lockout.
