Analog Devices Inc. ADP5042ACPZ-2-R7

Overview

ADP5042ACPZ-2-R7 from Analog Devices is a highly integrated micro power management unit (PMU) combining one 0.8 A buck regulator, two 300 mA low-dropout (LDO) regulators, and supervisory functions-including dual watchdog timers, manual reset, and open-drain processor reset-in a single 20-lead 4 mm × 4 mm LFCSP package. It delivers precise voltage regulation for mixed-signal SoC power domains in space-constrained portable and industrial embedded systems.

For engineers reviewing the ADP5042ACPZ-2-R7 datasheet, ADP5042ACPZ-2-R7 pinout, ADP5042ACPZ-2-R7 application, or ADP5042ACPZ-2-R7 equivalent, key selection considerations include its factory-programmed output voltages (VOUT1 = 1.8 V, VOUT2 = 3.3 V, VOUT3 = 3.3 V), ±1% initial buck accuracy, 3 MHz switching frequency, dual watchdog timeout flexibility, and guaranteed reset validity down to VCC = 1 V.

Technical Context

The ADP5042ACPZ-2-R7 implements a current-mode buck regulator with selectable forced PWM or auto PFM/PSM operation via the MODE pin, enabling high transient response and light-load efficiency optimization. Its buck section supports 100% duty-cycle operation and integrates overcurrent and thermal protection.

Each LDO operates from 1.7 V to 5.5 V input, achieves 150 mV dropout at 300 mA, maintains >60 dB PSRR up to 10 kHz, and delivers ultra-low output noise (110 µV rms typical at 2.8 V). The supervisory block provides independent reset threshold monitoring (±1.5% over −40°C to +125°C), glitch-immune manual reset, and two configurable watchdogs-WDI1 controlling reset only, WDI2 capable of triggering both reset and full regulator power cycle.

Key Specifications

Pinout & Package

ADP5042ACPZ-2-R7 is housed in a 20-lead, 4 mm × 4 mm, 0.5 mm pitch lead frame chip scale package (LFCSP) with exposed pad (EPAD) that must be connected to AGND for optimal thermal and electrical performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multi-rail PMU applications.

Compared with TPS65023RSBR and MAX20403ATPA+T, the ADP5042ACPZ-2-R7 uniquely balances compact 4 mm × 4 mm packaging, factory-set outputs for rapid design-in, and dual watchdogs with power-cycle capability-making it optimal for cost-sensitive, space-limited embedded systems requiring robust fault recovery without external supervision logic.

Availability

ADP5042ACPZ-2-R7 is available at Aetrix Electronics and suitable for mobile SoC power management, industrial PLC I/O modules, medical wearable sensor hubs, and automotive body control modules requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for ADP5042ACPZ-2-R7 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 (DSP) technologies, serving industrial, communications, automotive, and consumer markets.

The ADP5042ACPZ-2-R7 belongs to Analog Devices' micro PMU product line, engineered specifically for space-constrained, battery-powered, and safety-aware embedded systems requiring tightly integrated power regulation, sequencing, and intelligent supervision in a single IC.

FAQ

What are the factory-programmed output voltages of the ADP5042ACPZ-2-R7?

The ADP5042ACPZ-2-R7 has fixed factory-programmed output voltages: VOUT1 (buck) = 1.8 V, VOUT2 (LDO1) = 3.3 V, and VOUT3 (LDO2) = 3.3 V. These values are laser-trimmed during manufacturing and cannot be adjusted externally. The datasheet confirms this configuration in the Ordering Guide and General Description sections, and the pinout diagram shows VOUT1, VOUT2, and VOUT3 as dedicated output/sense nodes without external feedback resistors.

Does the ADP5042ACPZ-2-R7 support power sequencing between its regulators?

Yes, the ADP5042ACPZ-2-R7 supports controlled power sequencing via independent enable pins: EN1 for the buck regulator, EN2 for LDO1, and EN3 for LDO2-all active-high. The internal sequencing delay between regulators is guaranteed at 2 ms (tD1, tD2), allowing designers to implement custom startup order by toggling enables with external timing circuitry or microcontroller GPIOs. This is explicitly specified in Table 2 under Supervisory Specification.

What is the minimum input voltage required for the ADP5042ACPZ-2-R7 to assert a valid reset signal?

The ADP5042ACPZ-2-R7 guarantees valid open-drain reset output (nRSTO) down to VCC = 1 V, as stated in the Features list and confirmed in Table 2 (Supervisory Specification). This means the reset signal remains functional and meets timing specifications even during severe brownout conditions where AVIN drops to 1 V-critical for fail-safe operation in battery-powered systems.

Can the ADP5042ACPZ-2-R7's watchdog timers be disabled?

Watchdog 1 (WDI1) can be disabled by placing WDI1 in high-impedance state *only* when WMOD = low; if WMOD = high, WDI1 cannot be disabled. Watchdog 2 (WDI2) is factory-configurable and may be disabled depending on ordering option-but the ADP5042ACPZ-2-R7 variant retains full WDI2 functionality, including power-cycle capability. This behavior is documented in Table 8 (Pin Function Descriptions) and the Supervisory Specification tables.

What package type and thermal characteristics does the ADP5042ACPZ-2-R7 have?

The ADP5042ACPZ-2-R7 uses a 20-lead, 4 mm × 4 mm, 0.5 mm pitch LFCSP package with exposed pad (EPAD) connected to AGND. Its thermal resistance is θJA = 38°C/W and θJC = 4.2°C/W (per JEDEC-standard 4-layer board), supporting operation from −40°C to +125°C junction temperature. The exposed pad is mandatory for thermal performance and EMI reduction, as noted in Figure 2 and Thermal Data section.