Analog Devices Inc. ADP5071AREZ

Overview

ADP5071 from Analog Devices is a dual-output DC-DC switching regulator IC that independently generates programmable positive (up to +39 V) and negative (down to VIN − 39 V) rails from a single 2.85 V to 15 V input. It integrates a 2.0 A boost switch and 1.2 A inverting switch, operates at 1.2 MHz or 2.4 MHz, and supports external frequency synchronization from 1.0 MHz to 2.6 MHz for noise-sensitive bipolar supply applications such as precision ADCs and RF power amplifiers.

For engineers reviewing the ADP5071 datasheet, ADP5071 pinout, ADP5071 application, or ADP5071 equivalent, key selection considerations include independent output regulation, out-of-phase switching for reduced input ripple, slew rate control for EMI mitigation, true shutdown capability, and flexible start-up sequencing (VPOS-first, VNEG-first, or simultaneous).

Technical Context

The ADP5071 implements two independent PWM-controlled regulators: a boost stage with internal 2.0 A MOSFET and an inverting stage with internal 1.2 A MOSFET. Each uses current-mode control with transconductance error amplifiers (gM = 270–330 µA/V), programmable soft start (4–32 ms), and dedicated compensation pins (COMP1/COMP2).

It features synchronized 180° out-of-phase switching, resistor-programmable feedback references (VFB1 = 0.8 V, VREF − VFB2 = 0.8 V), and integrated protection including UVLO (2.85 V rising), OCP (2.2 A boost / 1.32 A inverter), OVP (0.86 V at FB1, 0.74 V at FB2), and thermal shutdown (150°C). The SYNC/FREQ pin selects fixed 1.2/2.4 MHz operation or enables external clock synchronization.

Key Specifications

Pinout & Package

The ADP5071 is available in a 20-lead LFCSP (4 mm × 4 mm, exposed pad) and 20-lead TSSOP package. Both packages share identical pin functions and require the exposed pad to be connected to AGND for thermal and electrical performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-output DC-DC regulator applications.

Compared with ADP5070 and LT3582, the ADP5071 offers higher output current headroom, integrated sequencing control, and active EMI reduction via slew programming - making it optimal for high-fidelity analog, RF, and optical systems where rail integrity and startup behavior are critical.

Availability

ADP5071 is available at Aetrix Electronics and suitable for precision analog instrumentation, optical module design, and RF power amplifier biasing requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ADP5071 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with R&D and manufacturing facilities worldwide.

The ADP5071 belongs to Analog Devices' precision power management product line, designed specifically for applications demanding tightly regulated, independently programmable bipolar supplies - especially in data conversion, sensing, and communications infrastructure.

FAQ

What is the maximum positive output voltage achievable with the ADP5071?

The ADP5071 supports an adjustable positive output voltage up to +39 V, determined by the boost regulator's internal 39 V maximum drain-source voltage rating and feedback configuration. This is achieved using the FB1 pin with a resistor divider referenced to the 0.8 V internal reference, and is valid across the full input range (2.85 V to 15 V) and operating temperature (−40°C to +125°C).

Can the ADP5071 generate both positive and negative outputs simultaneously from a single input supply?

Yes, the ADP5071 is explicitly designed to generate independently regulated positive (VPOS) and negative (VNEG) outputs simultaneously from one input supply (2.85 V to 15 V). Its dual-regulator architecture - combining a boost stage and an inverting stage - enables concurrent operation with out-of-phase switching to minimize input ripple, as confirmed in the General Description and Figure 40 block diagram.

Does the ADP5071 support external frequency synchronization, and what is the supported range?

Yes, the ADP5071 supports external frequency synchronization via the SYNC/FREQ pin, accepting an external clock signal from 1.0 MHz to 2.6 MHz. This capability is documented in Table 2 (Oscillator Circuit) and the Oscillator and Synchronization section, enabling precise EMI filtering and clock domain alignment in noise-sensitive systems like high-speed data converters.

How does the SEQ pin affect startup behavior of the ADP5071?

The SEQ pin configures the ADP5071's startup sequence: open = independent EN1/EN2 control; tied to VREG = simultaneous VPOS/VNEG startup triggered by EN2; pulled low = sequenced startup where either EN1 or EN2 determines which rail powers up first. This function is defined in Table 5 and the Start-Up Sequence section, allowing safe biasing of analog components with strict rail-order requirements.

What protection features are integrated into the ADP5071?

The ADP5071 integrates UVLO (2.85 V rising threshold), overcurrent protection (2.2 A boost / 1.32 A inverter), overvoltage protection (0.86 V at FB1, 0.74 V at FB2), and thermal shutdown (150°C with 15°C hysteresis). These protections are specified in the Absolute Maximum Ratings and Theory of Operation sections and operate autonomously without external components.