Analog Devices Inc. ADP7142ACPZN2.5-R7

Overview

ADP7142ACPZN2.5-R7 from Analog Devices is a 40 V, 200 mA, low-noise CMOS LDO linear regulator with fixed 2.5 V output, 11 µV_rms output noise, 88 dB PSRR at 10 kHz, and 200 mV typical dropout at full load. It delivers precision regulation for noise-sensitive analog circuits such as ADCs, DACs, and VCO VTUNE supplies in industrial instrumentation and automotive systems.

For engineers reviewing the ADP7142ACPZN2.5-R7 datasheet, ADP7142ACPZN2.5-R7 pinout, ADP7142ACPZN2.5-R7 application, or ADP7142ACPZN2.5-R7 equivalent, key selection criteria include its 2.7–40 V input range, ±0.8% initial accuracy, AEC-Q100 qualification, stable operation with 2.2 µF ceramic output capacitors, and LFCSP-6 package thermal performance.

Technical Context

The ADP7142ACPZN2.5-R7 employs a PMOS pass transistor architecture with an internal reference and error amplifier to achieve tight line/load/temperature regulation (±1.5% over −40°C to +85°C). Its proprietary design enables high PSRR (68 dB at 100 kHz) and ultra-low noise independent of output voltage - confirmed at 11 µV_rms for all fixed options ≤5 V.

It integrates precision enable with programmable hysteresis (100 mV), user-configurable soft start (via external capacitor on SS pin), and thermal shutdown (150°C threshold, 15°C hysteresis). The device operates stably with minimal 2.2 µF output capacitance and supports output adjustment above 2.5 V using an external feedback divider.

Key Specifications

Pinout & Package

ADP7142ACPZN2.5-R7 is packaged in a 2 mm × 2 mm, 6-lead LFCSP (Lead Frame Chip Scale Package) with exposed thermal pad electrically connected to GND. This compact, low-profile package delivers θ_JA = 72.1°C/W and Ψ_JB = 47.1°C/W on a 4-layer board, enabling high-power-density designs with efficient heat dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Compared with LT3045EDD-2.5#PBF and TLE42754G, ADP7142ACPZN2.5-R7 uniquely balances 40 V input capability, 11 µV_rms noise, AEC-Q100 qualification, and 2 mm × 2 mm LFCSP packaging - making it optimal for space-constrained, high-reliability analog power in automotive and industrial edge devices.

Availability

ADP7142ACPZN2.5-R7 is available at Aetrix Electronics and suitable for industrial instrumentation, automotive sensor modules, and precision data acquisition systems requiring stable component supply, long-term lifecycle support, and AEC-Q100 compliance.

Supply support for ADP7142ACPZN2.5-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, headquartered in Wilmington, MA.

The ADP7142 product line was designed specifically for noise-critical analog and mixed-signal applications demanding ultra-low noise, high PSRR, wide input voltage range, and automotive-grade reliability - targeting ADC/DAC, precision amplifier, and RF subsystem power needs.

FAQ

What is the maximum input voltage rating for ADP7142ACPZN2.5-R7?

The ADP7142ACPZN2.5-R7 has an absolute maximum input voltage rating of +44 V, with recommended continuous operation from 2.7 V to 40 V. Exceeding 40 V may trigger internal protection but is not guaranteed for sustained use. The device's 40 V operating limit makes it suitable for unregulated automotive and industrial 24 V/36 V supply rails, including those subject to load dump transients within specification.

Does ADP7142ACPZN2.5-R7 require an external capacitor on the SS pin?

No, ADP7142ACPZN2.5-R7 does not require an external capacitor on the SS pin. Leaving SS open yields a typical 380 µs startup time to 90% of 2.5 V. An external capacitor can be added only if slower, controlled ramp-up is needed - for example, to prevent inrush current in systems with large downstream capacitance. Grounding SS is strictly prohibited and may damage the device.

Can ADP7142ACPZN2.5-R7 be used in adjustable-output configurations?

Yes, ADP7142ACPZN2.5-R7 supports adjustable output voltages above its nominal 2.5 V using an external resistor divider on the SENSE/ADJ pin. The output can be set from 2.5 V up to VIN − V_DO, maintaining high PSRR and low noise. However, output noise scales with the adjusted voltage - so selecting the closest fixed option (e.g., 2.5 V instead of 3.3 V) minimizes noise penalty while meeting system requirements.

What is the thermal performance of ADP7142ACPZN2.5-R7 in its LFCSP package?

ADP7142ACPZN2.5-R7 in the 6-lead LFCSP package has θ_JA = 72.1°C/W and Ψ_JB = 47.1°C/W on a standard 4-layer PCB. The exposed thermal pad must be soldered to a solid ground plane to realize this performance. At 200 mA and 40 V input (worst-case power dissipation), proper layout keeps junction temperature within 150°C limit - enabling reliable operation in compact, sealed enclosures without forced air cooling.

Is ADP7142ACPZN2.5-R7 compatible with ceramic output capacitors smaller than 2.2 µF?

No, ADP7142ACPZN2.5-R7 requires a minimum 2.2 µF ceramic output capacitor for guaranteed stability across temperature and load conditions. Table 2 in the datasheet specifies 1.5 µF as the absolute minimum, but Analog Devices validates stability only with ≥2.2 µF X5R/X7R dielectric capacitors rated ≥6.3 V. Using smaller values risks oscillation, poor transient response, and potential output overshoot during load steps.