Analog Devices Inc. ADP2140ACPZ3318R7

Overview

ADP2140ACPZ3318R7 from Analog Devices is a dual-output power management IC integrating a 600 mA synchronous buck regulator and a 300 mA low-noise LDO in a single 10-lead 3 mm × 3 mm LFCSP package. It operates from 2.3 V to 5.5 V input, delivers 1.0–3.3 V buck output and 0.8–3.3 V LDO output, and achieves 3 MHz switching frequency with 20 μA quiescent current in PSM mode - optimized for battery-powered portable electronics requiring ultra-low standby power and high PSRR.

For engineers reviewing the ADP2140ACPZ3318R7 datasheet, ADP2140ACPZ3318R7 pinout, ADP2140ACPZ3318R7 application, or ADP2140ACPZ3318R7 equivalent, key selection criteria include its split-supply LDO architecture (VIN2 as low as 1.65 V), autosequencing enable logic, power-good indicator with 6% hysteresis, and thermal shutdown at 150°C - all critical for compact, multi-rail mobile SoC power delivery.

Technical Context

The ADP2140ACPZ3318R7 implements a proprietary high-speed current-mode PWM control scheme for the buck section, enabling fast transient response and stable operation with minimal external components. Its variable-frequency power-save mode reduces switching frequency under light loads to extend battery life without compromising regulation accuracy.

The integrated LDO operates in split-supply configuration, accepting VIN2 as low as 1.65 V - allowing direct connection to the buck output to minimize dropout loss and improve overall system efficiency. It delivers 40 μV_rms output noise at 1.2 V and 65 dB PSRR at 10 kHz, making it suitable for noise-sensitive analog/RF rails.

Key Specifications

Pinout & Package

ADP2140ACPZ3318R7 uses a 10-lead 3 mm × 3 mm LFCSP package with exposed thermal pad (EP) electrically connected to ground. The package supports high-density layout and enhanced thermal dissipation via PCB ground plane connection to EP.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS62745DSSR and MAX20004AATP+T, ADP2140ACPZ3318R7 uniquely combines 20 μA buck IQ, 40 μV_rms LDO noise, and autosequencing in a 3 mm × 3 mm footprint - delivering the highest integration density and lowest noise among verified alternatives for portable multi-rail designs.

Availability

ADP2140ACPZ3318R7 is available at Aetrix Electronics and suitable for mobile phones, digital cameras, and wearable health monitors requiring stable component supply across extended production lifecycles and seasonal demand peaks.

Supply support for ADP2140ACPZ3318R7 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and consumer markets since 1965.

The ADP2140ACPZ3318R7 belongs to Analog Devices' Power Management IC portfolio, designed specifically for space-constrained, battery-operated portable electronics needing high-efficiency dual-rail power with ultra-low quiescent current and low-noise regulation.

FAQ

What is the recommended input capacitor for ADP2140ACPZ3318R7?

The ADP2140ACPZ3318R7 requires a minimum 10 μF X7R ceramic input capacitor (CIN) placed close to VIN1 and PGND pins. This value ensures stable operation across temperature and voltage ranges while meeting ripple current ratings. Y5V or Z5U dielectrics are explicitly discouraged due to capacitance drift; X5R may be used only if derated to ≥15 μF at worst-case bias and temperature.

Does ADP2140ACPZ3318R7 support independent enable control for buck and LDO sections?

Yes, ADP2140ACPZ3318R7 supports independent control via EN1 (buck) and EN2 (LDO). When EN2 is pulled high, the LDO enables independently of EN1. When EN2 is left floating or grounded, the device enters autosequencing mode where EN1 triggers buck startup first, followed by LDO after a fixed 5 ms delay - ensuring proper power-up ordering without external timers.

What is the maximum allowable junction temperature for ADP2140ACPZ3318R7?

The ADP2140ACPZ3318R7 has a maximum operating junction temperature of +125°C, with thermal shutdown activating at +150°C (±10°C tolerance). Its 35.3°C/W θJA rating assumes a 4-layer PCB with full thermal pad soldering; actual TJ must be calculated using TJ = TA + (PD × θJA) and verified under worst-case load and ambient conditions.

Can ADP2140ACPZ3318R7's LDO be powered from its own buck output?

Yes, ADP2140ACPZ3318R7's LDO (VIN2) is explicitly designed for split-supply operation and accepts inputs as low as 1.65 V - enabling direct connection to the buck output (e.g., 1.8 V buck → 1.2 V LDO). This configuration improves system efficiency by eliminating intermediate voltage drops and reduces component count versus discrete solutions.

How does the power-good (PG) pin behave during startup and fault conditions?

The ADP2140ACPZ3318R7 PG pin is an open-drain output that remains low until both VOUT and VOUT2 exceed 92% of their nominal values, then pulls high. It falls low again if either output drops below 86% nominal, providing 6% hysteresis. During shutdown or undervoltage lockout, PG stays low - enabling reliable system reset sequencing and fault detection in host processors.