ADP5070 Series

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

Catalog

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

Part	Outputs and Type	Outputs and Type	Board Type	Voltage - Input [Max]	Voltage - Input [Min]	Regulator Topology	Supplied Contents	Main Purpose	Voltage - Output	Utilized IC / Part
Analog Devices ADP5070RE-EVALZ	2	Non-Isolated	Fully Populated	5.5 V	3 V	Boost	Board(s)	DC/DC Step Up	15 V	ADP5070

Catalog

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

Key Features

• Wide input supply voltage range: 2.85 V to 15 V

• Generates well regulated, independently resistor programmable VPOSand VNEGoutputs

• Boost regulator to generate VPOSoutputAdjustable positive output to 39 VIntegrated 1.0 A main switchOptional single-ended primary-inductor converter (SEPIC) configuration for automatic step-up/step-down

• 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 VNEGoutputAdjustable negative output to VIN− 39 VIntegrated 0.6 A main switch

• 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, VPOSfirst, or VNEGfirst

• 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 theADIsimPowertool set

Description

TheADP5070is 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.ApplicationsBipolar amplifiers, ADCs, DACs and multiplexersCharge-coupled device (CCD) bias supplyOptical module supplyRF power amplifier (PA) bias