Overview
The ADP5071AREZ from Analog Devices Inc. is a dual high-performance DC-to-DC regulator designed to generate independently regulated positive and negative output rails. This regulator supports a wide input voltage range of 2.85 V to 15 V, making it versatile for various applications. It features integrated main switches for both positive and negative outputs, allowing for adjustable output voltages up to +39 V and down to -39 V below the input voltage. The device operates at selectable switching frequencies of 1.2 MHz or 2.4 MHz and can be synchronized with an external oscillator for noise filtering in sensitive applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Input Voltage Range | 2.85 | 15 | V | ||
| Positive Output Voltage | 39 | V | Adjustable | ||
| Negative Output Voltage | -39 | V | Below input voltage | ||
| Switching Frequency | 1.2 | 2.4 | MHz | Pin selected | |
| Main Switch Current (Boost) | 2.0 | 2.2 | 2.4 | A | |
| Main Switch Current (Invert) | 1.2 | A | |||
| Minimum On Time | 50 | ns | |||
| Minimum Off Time | 25 | ns | |||
| Junction Temperature Range | -40 | 125 | °C | ||
| Package Type | 20-lead LFCSP, 20-lead TSSOP |
Key Features
- Wide input supply voltage range: 2.85 V to 15 V
- Independently resistor-programmable positive and negative outputs
- Boost regulator to generate positive output up to 39 V
- Inverting regulator to generate negative output down to -39 V below input voltage
- Integrated 2.0 A main switch for boost regulator and 1.2 A main switch for inverting regulator
- Optional single-ended primary-inductor converter (SEPIC) configuration
- True shutdown for both positive and negative outputs
- Resistor-programmable soft start timer and slew rate control for lower system noise
- Individual precision enable and flexible start-up sequence control
- Out-of-phase operation
- UVLO, OCP, OVP, and TSD protection
Applications
- Bipolar amplifiers
- ADCs, DACs, and multiplexers
- Charge-coupled device (CCD) bias supply
- Optical module supply
- RF power amplifier (PA) bias
Q & A
- What is the input voltage range of the ADP5071AREZ?
The input voltage range is from 2.85 V to 15 V. - What are the maximum positive and negative output voltages?
The maximum positive output voltage is up to 39 V, and the maximum negative output voltage is down to -39 V below the input voltage. - What are the switching frequencies available for the ADP5071AREZ?
The device operates at 1.2 MHz or 2.4 MHz, and it can be synchronized with an external oscillator from 1.0 MHz to 2.6 MHz. - What is the maximum current rating for the main switches?
The boost regulator has a 2.0 A main switch, and the inverting regulator has a 1.2 A main switch. - Does the ADP5071AREZ support true shutdown?
Yes, it supports true shutdown for both positive and negative outputs. - What protection features are included in the ADP5071AREZ?
The device includes UVLO, OCP, OVP, and TSD protection. - What are the package types available for the ADP5071AREZ?
The device is available in 20-lead LFCSP and 20-lead TSSOP packages. - What is the junction temperature range for the ADP5071AREZ?
The junction temperature range is from -40°C to +125°C. - Can the ADP5071AREZ be used in SEPIC configuration?
Yes, it supports an optional single-ended primary-inductor converter (SEPIC) configuration. - How can the start-up sequence be controlled in the ADP5071AREZ?
The device allows for individual precision enable and flexible start-up sequence control, including symmetric start, VPOS first, or VNEG first.
