Overview
The ADP5070ACPZ 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 is versatile, supporting a wide input voltage range of 2.85 V to 15 V, making it suitable for a variety of applications. The ADP5070 features integrated main switches for both the boost and inverting regulators, enabling adjustable positive output voltages up to +39 V and negative output voltages down to -39 V below the input voltage. The device operates at a pin-selected 1.2 MHz or 2.4 MHz switching frequency and can be synchronized with an external oscillator for noise reduction in sensitive applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Input Supply Voltage Range | 2.85 | 15 | V | PVIN1, PVIN2, PVINSYS | |
| Boost Switch Current | 1.0 | A | |||
| Inverter Switch Current | 0.6 | A | |||
| Positive Output Voltage Range | 39 | V | Adjustable | ||
| Negative Output Voltage Range | -39 | V | Adjustable, below VIN | ||
| Switching Frequency | 1.2 MHz | 2.4 MHz | Pin-selected | ||
| Operating Junction Temperature Range | -40°C | 125°C | |||
| Package Type | 20-lead LFCSP or 20-lead TSSOP |
Key Features
- Wide input supply voltage range: 2.85 V to 15 V
- Adjustable positive output up to +39 V and negative output down to -39 V below input voltage
- Integrated 1.0 A main switch for boost regulator and 0.6 A main switch for inverting regulator
- Optional single-ended primary-inductor converter (SEPIC) configuration for automatic step-up/step-down
- 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
The ADP5070ACPZ is suitable for various applications requiring dual regulated positive and negative voltage rails, such as:
- Bipolar ADC/DAC/AMP power supplies
- High-performance analog circuits
- Audio and video equipment
- Medical devices
- Industrial control systems
Q & A
- What is the input voltage range of the ADP5070ACPZ?
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 +39 V, and the maximum negative output voltage is -39 V below the input voltage. - What are the switching frequencies available for the ADP5070ACPZ?
The device operates at pin-selected 1.2 MHz or 2.4 MHz switching frequencies. - Does the ADP5070ACPZ support external frequency synchronization?
Yes, it can synchronize with an external oscillator from 1.0 MHz to 2.6 MHz. - What safety features are included in the ADP5070ACPZ?
The device includes UVLO, OCP, OVP, and TSD protection. - What is the junction temperature range for the ADP5070ACPZ?
The operating junction temperature range is from -40°C to +125°C. - What package types are available for the ADP5070ACPZ?
The device is available in 20-lead LFCSP or 20-lead TSSOP packages. - Does the ADP5070ACPZ support flexible start-up sequencing?
Yes, it supports manual enable, simultaneous mode, positive supply first, and negative supply first start-up sequences. - How does the ADP5070ACPZ manage inrush current at power-up?
The device includes a fixed internal or resistor programmable soft start timer to prevent inrush current. - What is the purpose of the slew rate control in the ADP5070ACPZ?
The slew rate control is used to reduce electromagnetic interference (EMI) by adjusting the MOSFET driver stage.
