Analog Devices Inc. ADP5070/ADP5071 DC-to-DC Switching Regulators

Analog Devices ADP5070/ADP5071 DC-to-DC switching regulators are dual high-performance DC-to-DC regulators that generate independently regulated positive and negative rails. With an input voltage range of 2.85V to 15V, ADP5070/ADP5071 supports a wide array of applications.

The integrated main switch in both regulators allows the generation of an adjustable positive output voltage up to +39V and a negative output voltage down to -39V below the input voltage. Operating at a pin-selected 1.2MHz/2.4MHz switching frequency, ADP5070/ADP5071 can synchronize with an external oscillator from 1.0MHz to 2.6MHz to ease noise filtering in sensitive applications.

Key safety features include overcurrent protection (OCP), overvoltage protection (OVP), thermal shutdown (TSD), and input under-voltage lockout (UVLO).

Available in a 20-lead LFCSP package and rated for a -40°C to +125°C junction temperature range, the ADP5070/ADP5071 DC-to-DC switching regulators are ideal for bipolar amplifiers, ADCs, DACs & multiplexers, charge-coupled device (CCD) bias supply, optical module supply, and RF power amplifier (PA) bias.

Features

Wide input supply voltage range: 2.85V to 15V
Generates well regulated, independently resistor programmable VPOS and VNEG outputs
Boost regulator to generate VPOS output
- Adjustable positive output to 39V
- Integrated main switch
  - 1.0A (ADP5070)
  - 1.2A (ADP5071)
- 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 − 39V
- Integrated 0.6A main switch
  - 0.6A (ADP5070)
  - 1.2A (ADP5071)

True shutdown for both positive and negative outputs
1.2MHz/2.4MHz switching frequency with optional external frequency synchronization from 1.0MHz to 2.6MHz
Resistor programmable soft-start timer
Slew rate control for lower system noise
Individual precision enable and flexible start-up sequence control for the symmetric start, VPOS first, or VNEGfirst
Out-of-phase operation
UVLO, OCP, OVP, and TSD protection
4mm × 4mm, 20-lead LFCSP and 20-lead TSSOP
-40°C to +125°C junction temperature range
Supported by the ADIsimPower toolset

Applications

Bipolar amplifiers, ADCs, DACs, and multiplexers
Charge-coupled device (CCD) bias supply

Optical module supply
RF power amplifier (PA) bias

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