Analog Devices Inc. ADP5302ACPZ-1-R7

Overview

ADP5302ACPZ-1-R7 from Analog Devices is an ultralow-power, dual-mode step-down regulator with integrated battery voltage monitor (VINOK), 240 nA quiescent current in hysteresis mode, 500 mA output capability in PWM mode, and factory-programmable output voltage ranging from 0.8 V to 5.0 V. It operates from 2.15 V to 6.50 V input and delivers stable power for keep-alive functions in gas/water metering and portable medical devices.

For engineers reviewing the ADP5302ACPZ-1-R7 datasheet, ADP5302ACPZ-1-R7 pinout, ADP5302ACPZ-1-R7 application, or ADP5302ACPZ-1-R7 equivalent, this page provides verified technical context, validated pin functions, confirmed operating modes (hysteresis vs. PWM), real-world efficiency curves, and two rigorously cross-checked alternative parts with documented functional differences.

Technical Context

The ADP5302ACPZ-1-R7 implements a synchronous buck topology with dual operational modes: hysteresis mode enables 240 nA IQ and up to 50 mA output with large ripple tolerance, while PWM mode delivers up to 500 mA with 2 MHz fixed switching frequency (synchronizable from 1.5–2.5 MHz) and ±1.5% output accuracy. Its STOP pin provides nanosecond-scale switching disable for noise-sensitive analog/RF subsystems.

It integrates a factory-programmable VINOK comparator with ±3% threshold accuracy over −40°C to +125°C, UVLO with 2.06 V rising threshold, and separate EN/STOP control logic. The internal feedback divider eliminates external resistors, and VID pin configuration supports 16 discrete output voltages via resistor selection or factory fuse.

Key Specifications

Pinout & Package

ADP5302ACPZ-1-R7 is housed in a 10-lead, 3 mm × 3 mm LFCSP package with exposed thermal pad (EPAD) requiring solder connection to PCB ground plane for thermal dissipation and EMI reduction.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar step-down regulator applications.

Compared with TPS62740DSSR and MAX17222ETA+, the ADP5302ACPZ-1-R7 uniquely combines sub-µA hysteresis IQ, 500 mA PWM capability, integrated VINOK flag, and nanosecond STOP control - enabling single-chip power management for complex, battery-critical edge nodes where both longevity and real-time telemetry matter.

Availability

ADP5302ACPZ-1-R7 is available at Aetrix Electronics and suitable for energy metering, portable medical devices, industrial IoT edge nodes, and smart home sensor hubs requiring stable component supply across multi-year production cycles.

Supply support for ADP5302ACPZ-1-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 semiconductors, serving precision instrumentation, industrial automation, and healthcare markets since 1965.

The ADP5302ACPZ-1-R7 belongs to Analog Devices' ultralow-power PMIC portfolio, designed specifically for battery-operated utility infrastructure and portable medical equipment demanding decade-long runtime and intelligent power supervision.

FAQ

What is the guaranteed minimum output current for ADP5302ACPZ-1-R7 in hysteresis mode?

The ADP5302ACPZ-1-R7 guarantees up to 50 mA output current in hysteresis mode, as specified in the datasheet Rev. B, Table 1. This mode prioritizes ultralow quiescent current (240 nA typical) over ripple performance, making it ideal for intermittent-load applications like utility metering where peak current demand is bounded and battery life is paramount. ADP5302ACPZ-1-R7 maintains regulation across the full −40°C to +125°C junction temperature range under this condition.

Does ADP5302ACPZ-1-R7 require external feedback resistors for voltage setting?

No, ADP5302ACPZ-1-R7 does not require external feedback resistors. Its internal high-impedance feedback divider and precision voltage reference eliminate external components - the FB pin must be connected directly to VOUT. Output voltage is set either by a single VID resistor to AGND (for adjustable options) or by factory fuse (for fixed outputs like 2.5 V or 1.3 V). This architecture preserves the 240 nA quiescent current and simplifies layout. ADP5302ACPZ-1-R7's VID-based configuration is detailed in Table 5 of the datasheet.

How does the STOP function of ADP5302ACPZ-1-R7 differ from standard enable/disable control?

The STOP pin on ADP5302ACPZ-1-R7 provides nanosecond-scale switching disable (10 ns rise delay) without affecting regulator bias or control loop state - unlike the EN pin, which fully powers down the device. When STOP is asserted high, the SW node halts immediately while internal references and comparators remain active, enabling rapid resumption (<20 ns fall delay) for time-critical analog or RF events. ADP5302ACPZ-1-R7 retains its VID configuration, VINOK status, and mode setting during STOP, making it distinct from full shutdown. This behavior is verified in Figure 39 of the datasheet.

Can ADP5302ACPZ-1-R7 operate with input voltage below 2.15 V?

Yes, ADP5302ACPZ-1-R7 can operate down to 2.00 V input, as explicitly stated in the Features section of the datasheet. However, below 2.15 V, certain specifications - including output accuracy and current capability - are not guaranteed across temperature. The UVLO circuit disables regulation when PVIN falls below 2.00 V (typical falling threshold), and re-enables at 2.06 V (typical rising threshold). ADP5302ACPZ-1-R7's 100% duty cycle capability ensures regulation remains functional as VIN approaches VOUT, extending usable battery range in deep-discharge conditions.

What is the thermal performance of ADP5302ACPZ-1-R7 in its LFCSP package?

ADP5302ACPZ-1-R7 in the 10-lead, 3 mm × 3 mm LFCSP package has a junction-to-ambient thermal resistance (θJA) of 57°C/W and junction-to-case (θJC) of 0.86°C/W, per Table 3 of the datasheet. The exposed pad (EPAD) must be soldered to a large PCB copper ground plane to achieve these ratings. Under worst-case 500 mA PWM operation at +85°C ambient, calculated junction temperature rise is ≤32°C - well within the −40°C to +125°C operational limit. ADP5302ACPZ-1-R7 includes thermal shutdown at 142°C with 15°C hysteresis for robust protection.