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  2. Power Management
  3. Switching Regulators
  4. Step-Up (Boost) Regulators
  5. Internal Power Switch Boost Regulators
  6. ADP5070


Overview

Features and Benefits

  • Wide input supply voltage range: 2.85 V to 15 V
  • Generates well regulated, independently resistor programmable VPOS and VNEG outputs
  • Boost regulator to generate VPOS 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 VNEG output
    • Adjustable negative output to VIN − 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, VPOS first, or VNEG 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 Lifecycle icon-recommended 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)

Documentation & Resources

  • View All (10)
  • Data Sheets (1)
  • Application Notes (3)
  • User Guides (2)
  • Circuit Note (1)
  • Press Releases (1)
  • Technical Articles (2)
  • 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

    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)

    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)
    ADP5070ACPZ-R7 Material Declaration Reliability Data 20-Lead LFCSP (4mm x 4mm w/ EP)
    ADP5070AREZ Material Declaration Reliability Data 20-Lead TSSOP (4.4mm x 6.5mm w/ EP)
    ADP5070AREZ-R7 Material Declaration Reliability Data 20-Lead TSSOP (4.4mm x 6.5mm w/ EP)
    Wafer Fabrication Data

    Sample & Buy


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