ADP5070

1 A/0.6 A, DC-to-DC Switching Regulator with Independent Positive and Negative Outputs

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Overview

Features and Benefits
Product Details

Features and Benefits

Wide input supply voltage range: 2.85 V to 15 V
Generates well regulated, independently resistor programmable V_POS and V_NEG outputs
Boost regulator to generate V_POS output
- Adjustable positive output to 39 V
- Integrated 1.0 A main switch
- Optional single-ended primary-inductor converter (SEPIC) configuration for automatic step-up/step-down
Inverting regulator to generate V_NEG output
- Adjustable negative output to V_IN − 39 V
- Integrated 0.6 A main switch
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
Slew rate control for lower system noise
Individual precision enable and flexible start-up sequence control for symmetric start, V_POS first, or V_NEG first
Out-of-phase operation
UVLO, OCP, OVP, and TSD protection
4 mm × 4 mm, 20-lead LFCSP and 20-lead TSSOP
−40°C to +125°C junction temperature range
Supported by the ADIsimPower tool set

Product Details

The ADP5070 is a dual high performance dc-to-dc regulator that generates independently regulated positive and negative rails.

The input voltage range of 2.85 V to 15 V supports a wide variety of applications. The integrated main switch in both regulators enables generation of an adjustable positive output voltage up to +39 V and a negative output voltage down to −39 V below input voltage.

The ADP5070 operates at a pin selected 1.2 MHz/2.4 MHz switching frequency. The ADP5070 can synchronize with an external oscillator from 1.0 MHz to 2.6 MHz to ease noise filtering in sensitive applications. Both regulators implement programmable slew rate control circuitry for the MOSFET driver stage to reduce electromagnetic interference (EMI).

Flexible start-up sequencing is provided with the options of manual enable, simultaneous mode, positive supply first, and negative supply first.

The ADP5070 includes a fixed internal or resistor programmable soft start timer to prevent inrush current at power-up. During shutdown, both regulators completely disconnect the loads from the input supply to provide a true shutdown.

Other key safety features in the ADP5070 include overcurrent protection (OCP), overvoltage protection (OVP), thermal shutdown (TSD), and input undervoltage lockout (UVLO).

The ADP5070 is available in a 20-lead LFCSP or in a 20-lead TSSOP and is rated for a −40°C to +125°C junction temperature range.

Applications

Bipolar amplifiers, ADCs, DACs and multiplexers
Charge-coupled device (CCD) bias supply
Optical module supply
RF power amplifier (PA) bias

Product Categories

Power Management

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Product Lifecycle Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits (2)

SCP-ADP5070-EVALZ

ADP5070 Signal Chain Evaluation Board | Dual Boost/Inverting Converter

EVAL-ADP5070

ADP5070/ADP5071 Evaluation Board

SCP-ADP5070-EVALZ

View Detailed Evaluation Kit Information

Demonstration circuit SCP-ADP5070-EVALZ is a dual out-put DC-DC converter designed to create a dual polarity regulated voltage for powering several signal chains. The positive regulator provides 15V/1A of output while the negative regulator delivers –15V/300mA.

Like all boards in the Signal Chain Power series, this board is designed to be easily plugged into other SCP boards to form a complete signal chain power system, enabling fast evaluation of low power signal chains. To evaluate this board, some universal SCP hardware is required, namely:

SCP-INPUT-EVALZ
SCP-OUTPUT-EVALZ
SCP-1X5BKOUT-EVALZ
SCP-THRUBRD-EVALZ

SCP-FILTER-EVALZ
SCP-1X2BKOUT-EVALZ
SCP-5X1-EVALZ

To properly evaluate SCP series demo boards, you will need the SCP Configurator companion software. SCP Configurator can help you choose the right board and topology for your design.

Note that the Demo Manual does not cover details important to the operation and configuration regarding the ADP5070. Please refer to the ADP5070 datasheet for a complete description of the part.

Resources

EVAL-ADP5070

View Detailed Evaluation Kit Information

The ADP5070CP-EVALZ and ADP5071CP-EVALZ evaluation board are used to demonstrate the functionality of the ADP5070 and ADP5071 dc-to-dc converters, respectively.

Simple device measurements, such as line regulation, load regulation and efficiency, can be evaluated with the board. Device features, including selectable operating frequency, soft start, sequencing and slew rate control, may be demonstrated. The ADP7142 and ADP7182 LDOs are also available on the board as an option for enhanced low noise output.

For more details about dc-to-dc converters, refer to the ADP5070 and ADP5071 datasheets. For further information on the LDOs, refer to the ADP7142 and ADP7182 datasheet.

Additional Equipment Needed

DC power supply
Multimeters for voltage and current measurements
Electronic or resistive loads

Evaluation Kit Contents

ADP5070CP-EVALZ or ADP5071CP-EVALZ evaluation board

Features & Benefits

Input voltage range: 3V to 5.5V
Output Voltage: +/- 15V
Output Voltage With LDOs: +/-12V

Resources

Documentation & Resources

Data Sheets

ADP5070: 1 A/0.6 A, DC-to-DC Switching Regulator with Independent Positive and Negative Outputs Data Sheet (Rev. E)
2/1/2015

PDF

915 K

Application Notes

AN-1359: Low Noise, Dual-Supply Solution Using the ADP5070 for the Precision AD5761R Bipolar DAC in Single-Supply Systems (Rev. A)
12/4/2015

PDF

0 M
AN-1368: Ferrite Bead Demystified (Rev. 0)
8/12/2015

PDF

443 K
AN-1366: Using the ADP5070/ADP5071 to Create Positive and Negative Voltage Rails when VOUT < VIN (Rev. 0)
7/31/2015

PDF

287 K

User Guides

UG-848: Evaluating the ADP5070/ADP5071 DC-to-DC Switching Regulators/Converters (Rev. A)
8/5/2015

PDF

372 K
UG-758: Evaluating the ADP5070/ADP5071 DC-to-DC Switching Regulators/Converters (Rev. A)
8/5/2015

PDF

361K

Circuit Note

CN-0385: Isolated, Multichannel Data Acquisition System with PGIA for Single-Ended and Differential Industrial Level Signals (Rev. 0)
10/10/2016

PDF

525 K

Press Releases

Bias Generation and Level Setting Made Easy with Multiple Range, User Programmable Voltage Output D/A Converter
4/21/2022

Technical Articles

Bipolar Power Solutions for Precision Test and Measurement Systems
7/1/2019
Preventing Start-Up Issues Due to Output Inrush in Switching Converters
1/1/2018 Analog Dialogue

Tools & Simulations

LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

LTspice downloads and documentation

Models for the following parts are available in LTspice:

ADP5070

Design Tools

ADP507x Design Tool

Microsoft Excel download tool from ADIsimPower to generate a power supply design complete with a schematic, bill of materials, and performance specifications.

Reference Designs (2)

CN0513

20-Bit, 1.8 MSPS, ±2.5 ppm INL, Low Drift, High Accuracy Data Acquisition Solution

CN0385

Isolated, Multichannel Data Acquisition System with PGIA for Single-Ended and Differential Industrial Level Signals

CN0513

20-Bit, 1.8 MSPS, ±2.5 ppm INL, Low Drift, High Accuracy Data Acquisition Solution

CN0513

20-Bit, 1.8 MSPS, ±2.5 ppm INL, Low Drift, High Accuracy Data Acquisition Solution

View Detailed Reference Design Information

Features & Benefits

Data acquisition solution fully characterized over 0°C to 70°C
Guaranteed 20-bit no missing codes
INL: ±2 ppm, DNL: ±0.25 ppm
Throughput: 1.8 MSPS
Offset error drift: ±3.5 ppm/°C; gain error drift: ±6 ppm/°C
SNR: 98 dB at G = 1, 92 dB at G = 10, f_IN = 1 kHz
THD: −120 dB at G = 1, −116 dB at G = 10, f_IN = 1 kHz
Oversampled dynamic range: 102 dB at 900 kSPS, OSR = 2
Software programmable bipolar input ranges (±1 V to ±10 V)
- Allows single-ended and differential signals
CMRR: 92 dB typical
GΩ input impedance allows direct interface with sensors
Ease of use features reduce system power and complexity
ADC Input overvoltage clamp protection sinks up to 50 mA
On-board 5 V reference and buffer
First conversion accurate, no latency/pipeline delay
Fast conversion time allows low SPI clock rates
SPI-/QSPI-/MICROWIRE-/DSP-compatible serial interface

Parts Used

Resources

CN0513 Design Files

ZIP

12.44 M

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

Part Number	Material Declaration	Reliability Data	Pin/Package Drawing	CAD Symbols, Footprints & 3D Models
ADP5070ACPZ	Material Declaration	Reliability Data	20-Lead LFCSP (4mm x 4mm w/ EP)	Ultra Librarian SamacSys
ADP5070ACPZ-R7	Material Declaration	Reliability Data	20-Lead LFCSP (4mm x 4mm w/ EP)	Ultra Librarian SamacSys
ADP5070AREZ	Material Declaration	Reliability Data	20-Lead TSSOP (4.4mm x 6.5mm w/ EP)	Ultra Librarian SamacSys
ADP5070AREZ-R7	Material Declaration	Reliability Data	20-Lead TSSOP (4.4mm x 6.5mm w/ EP)	Ultra Librarian SamacSys
Wafer Fabrication Data

Request Product/Process Change Notifications

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Support & Discussions

ADP5070 Discussions

AD5761ARUZ-RL7

6 day(s) ago in Precision DACs

RE: ADP5070 has no negative voltage

All ADP5070 Discussions

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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.