Overview
The ADP5070AREZ, produced by Analog Devices Inc., is a dual high-performance DC-to-DC regulator designed to generate independently regulated positive and negative voltage 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 in both regulators, enabling the generation of an adjustable positive output voltage up to +39 V and a negative output voltage down to −39 V below the input voltage.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Input Supply Voltage Range | 2.85 | 15 | V | PVIN1, PVIN2, PVINSYS | |
| Switching Frequency | 1.2 | 2.4 | 2.6 | MHz | Pin selected or external oscillator |
| Positive Output Voltage | +39 | V | Adjustable | ||
| Negative Output Voltage | −39 | V | Below input voltage | ||
| Boost Switch Current | 1.0 | A | |||
| Inverter Switch Current | 0.6 | A | |||
| Operating Temperature | −40 | +125 | °C | Junction temperature range | |
| Package Type | 20-lead TSSOP-EP |
Key Features
- Wide input supply voltage range: 2.85 V to 15 V
- Adjustable positive and negative output voltages up to +39 V and down to −39 V, respectively
- Integrated main switches for boost and inverting regulators
- Programmable slew rate control for reduced EMI
- Flexible start-up sequencing: manual enable, simultaneous mode, positive supply first, and negative supply first
- Fixed internal or resistor programmable soft start timer to prevent inrush current
- True shutdown with complete disconnection of loads from the input supply
- Protection features: overcurrent protection (OCP), overvoltage protection (OVP), thermal shutdown (TSD), and input undervoltage lockout (UVLO)
Applications
- Bipolar amplifiers
- Analog-to-Digital Converters (ADCs) and Digital-to-Analog Converters (DACs)
- 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 ADP5070? The input voltage range is 2.85 V to 15 V.
- What are the maximum positive and negative output voltages of the ADP5070? The maximum positive output voltage is +39 V, and the maximum negative output voltage is −39 V below the input voltage.
- What are the switching frequencies available for the ADP5070? The ADP5070 operates at pin-selected frequencies of 1.2 MHz or 2.4 MHz, and it can also synchronize with an external oscillator from 1.0 MHz to 2.6 MHz.
- What protection features does the ADP5070 include? The ADP5070 includes overcurrent protection (OCP), overvoltage protection (OVP), thermal shutdown (TSD), and input undervoltage lockout (UVLO).
- What is the operating temperature range of the ADP5070? The operating temperature range is −40°C to +125°C.
- What package types are available for the ADP5070? The ADP5070 is available in a 20-lead TSSOP-EP package.
- Does the ADP5070 support flexible start-up sequencing? Yes, it supports manual enable, simultaneous mode, positive supply first, and negative supply first start-up sequencing.
- How does the ADP5070 manage inrush current during power-up? The ADP5070 includes a fixed internal or resistor programmable soft start timer to prevent inrush current at power-up.
- What happens to the loads during shutdown of the ADP5070? During shutdown, both regulators completely disconnect the loads from the input supply to provide a true shutdown.
- Can the ADP5070 be used in noise-sensitive applications? Yes, the ADP5070 features programmable slew rate control to reduce electromagnetic interference (EMI), making it suitable for noise-sensitive applications.
