Overview
The ADP5070ACPZ-R7 is a dual high-performance DC-to-DC regulator produced by Analog Devices Inc. This component is designed to generate independently regulated positive and negative output rails, making it versatile for a wide range of applications. The regulator supports an input voltage range of 2.85 V to 15 V, enabling it to be used in various power supply scenarios. The ADP5070 features integrated main switches for both the positive and negative output regulators, allowing for adjustable output voltages up to +39 V and down to -39 V relative to the input voltage.
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 | Up to +39 V | V | Adjustable | ||
| Negative Output Voltage Range | Down to -39 V | V | Adjustable relative to input voltage | ||
| Switching Frequency | 1.2 MHz | 2.4 MHz | Pin selected, with optional external synchronization from 1.0 MHz to 2.6 MHz | ||
| Junction Temperature Range | -40°C | +125°C |
Key Features
- Wide input supply voltage range: 2.85 V to 15 V
- Generates well-regulated, independently resistor-programmable positive and negative outputs
- Boost regulator to generate positive output up to +39 V and inverting regulator to generate negative output down to -39 V relative to input voltage
- Integrated 1.0 A main switch for positive output and 0.6 A main switch for negative output
- Optional single-ended primary-inductor converter (SEPIC) configuration for automatic step-up/step-down
- True shutdown for both positive and negative outputs
- 1.2 MHz/2.4 MHz switching frequency with optional external frequency synchronization from 1.0 MHz to 2.6 MHz
- Resistor-programmable soft start timer and slew rate control for lower system noise
- Individual precision enable and flexible start-up sequence control (symmetric start, VPOS first, or VNEG first)
- Out-of-phase operation and protection features including UVLO, OCP, OVP, and TSD
Applications
- Bipolar amplifiers, ADCs, DACs, and multiplexers
- Charge-coupled device (CCD) bias supply
- Optical module supply
- RF power amplifier (PA) bias supply
Q & A
- What is the input voltage range of the ADP5070?
The input voltage range of the ADP5070 is 2.85 V to 15 V.
- What are the maximum positive and negative output voltages of the ADP5070?
The ADP5070 can generate a positive output up to +39 V and a negative output down to -39 V relative to the input voltage.
- What are the switching frequencies available for the ADP5070?
The ADP5070 operates at pin-selected 1.2 MHz or 2.4 MHz switching frequencies, with optional external synchronization from 1.0 MHz to 2.6 MHz.
- Does the ADP5070 have built-in protection features?
Yes, the ADP5070 includes protection features such as overcurrent protection (OCP), overvoltage protection (OVP), thermal shutdown (TSD), and input undervoltage lockout (UVLO).
- What is the junction temperature range of the ADP5070?
The ADP5070 is rated for a junction temperature range of -40°C to +125°C.
- What are the package options for the ADP5070?
The ADP5070 is available in a 20-lead LFCSP or a 20-lead TSSOP package.
- Can the ADP5070 be used in bipolar amplifier applications?
Yes, the ADP5070 is suitable for bipolar amplifier applications, among others.
- Does the ADP5070 support flexible start-up sequencing?
Yes, the ADP5070 provides flexible start-up sequencing options including manual enable, simultaneous mode, positive supply first, and negative supply first.
- How does the ADP5070 reduce electromagnetic interference (EMI)?
The ADP5070 implements programmable slew rate control circuitry for the MOSFET driver stage to reduce EMI.
- What is the purpose of the soft start timer in the ADP5070?
The soft start timer in the ADP5070 is designed to prevent inrush current at power-up and can be either fixed internally or resistor-programmable.
