ADP5070ACPZ

Overview

The ADP5070ACPZ is a dual high-performance DC-to-DC switching regulator from Analog Devices, housed in a 20-lead LFCSP package. It generates independently regulated positive and negative output rails from a single input voltage source ranging from 2.85 V to 15 V. The device integrates a boost converter for the positive rail, delivering up to +39 V with a 1 A main switch, and an inverting SEPIC converter for the negative rail, providing down to -39 V with a 0.6 A main switch. Operating at selectable 1.2 MHz or 2.4 MHz frequencies, it features programmable soft-start, slope control, and comprehensive protection mechanisms including UVLO, OCP, OVP, and thermal shutdown.

Feature Summary

• Generates independent positive and negative power rails from a single supply
• Integrates boost and SEPIC topologies for flexible voltage conversion
• Features pin-selectable switching frequencies for noise optimization
• Includes precise enable controls and flexible startup sequencing

Applications

• Powering bipolar ADCs and DACs requiring dual supplies
• Supplying operational amplifiers in precision instrumentation
• Providing dual rails for sensor interfaces
• Generating auxiliary power for FPGA I/O banks

Procurement Notes

Verify the specific suffix (e.g., REEL vs TR) against the manufacturer's current datasheet revision to ensure correct packaging configuration. Confirm that the LFCSP-20 EP package matches the target PCB footprint and thermal requirements. Cross-reference the operating temperature range with system constraints before finalizing procurement orders.

Selection Notes

Select this component when a single-input dual-output solution is required for analog signal chains. The integrated boost and inverting regulators simplify design compared to discrete solutions. Ensure the load current requirements do not exceed the 1 A positive and 0.6 A negative limits. Consider the 2.85 V minimum input voltage when designing for low-voltage battery applications.

Part Context

The ADP5070 belongs to Analog Devices' uPMU family of power management ICs designed for compact systems. It replaces traditional multi-chip solutions by combining two regulators in one package. The LFCSP-20 EP variant offers improved thermal performance through an exposed pad, suitable for space-constrained portable and industrial electronics.

Replacement Considerations

• ADP5070AREZ-R7
• ADP5071ACPZ-R7

FAQ

Can the ADP5070 operate with an input voltage lower than the desired positive output?

Yes, the device supports SEPIC configuration for the negative rail and can boost the positive rail, allowing operation even if the input voltage is below the target output levels.

How is the switching frequency determined?

The switching frequency is pin-selectable between 1.2 MHz and 2.4 MHz, allowing designers to optimize for efficiency or external component size.