Analog Devices Inc. ADP2140ACPZ1533R7

Overview

ADP2140ACPZ1533R7 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 1.5 V buck output and 3.3 V LDO output (as indicated by suffix "1533"), and achieves 3 MHz switching frequency with 20 μA quiescent current in PSM mode - optimized for battery-powered portable electronics requiring high efficiency and ultra-low standby power.

For engineers reviewing the ADP2140ACPZ1533R7 datasheet, ADP2140ACPZ1533R7 pinout, ADP2140ACPZ1533R7 application, or ADP2140ACPZ1533R7 equivalent, key selection criteria include verified dual-rail sequencing capability, measured 110 mV LDO dropout at 300 mA, confirmed 65 dB PSRR at 10 kHz, validated 70 µs startup time, and documented thermal shutdown at 150°C - all critical for compact, thermally constrained mobile designs.

Technical Context

The ADP2140ACPZ1533R7 implements a proprietary high-speed current-mode PWM control scheme for the buck section, enabling stable regulation and fast transient response across its 2.55–3.15 MHz nominal switching frequency range. Its LDO operates in split-supply mode with VIN2 as low as 1.65 V, supporting direct connection to the buck output to maximize system efficiency.

Power sequencing is user-configurable via EN1 and EN2 pins, supporting autosequencing where the higher-voltage rail (buck) enables first. The device integrates soft start (150 µs for buck), power-good monitoring with 6% hysteresis, undervoltage lockout (2.3 V rising threshold), and thermal protection with 20°C hysteresis - all essential for robust operation in portable applications.

Key Specifications

Pinout & Package

ADP2140ACPZ1533R7 uses a 10-lead 3 mm × 3 mm LFCSP package with exposed thermal pad (EP) electrically connected to PGND. The package supports high thermal performance (θJA = 35.3°C/W) and requires PCB ground plane connection to the EP for optimal junction temperature control.

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, ADP2140ACPZ1533R7 uniquely combines 3 MHz operation, 1.5 V/3.3 V fixed dual outputs, autosequencing, and 65 dB PSRR in a 3 mm × 3 mm footprint - making it optimal for space- and noise-constrained portable designs where precise rail matching matters.

Availability

ADP2140ACPZ1533R7 is available at Aetrix Electronics and suitable for mobile phones, digital cameras, and wearable health monitors requiring stable component supply, long-term lifecycle support, and guaranteed authenticity from authorized channels.

Supply support for ADP2140ACPZ1533R7 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 design centers worldwide and a legacy of precision power management innovation.

The ADP2140ACPZ1533R7 belongs to Analog Devices' ADP21xx family of integrated power solutions, engineered specifically for portable and battery-powered applications demanding ultra-low quiescent current, small solution size, and reliable dual-rail sequencing.

FAQ

What output voltages does the ADP2140ACPZ1533R7 provide?

The ADP2140ACPZ1533R7 delivers a fixed 1.5 V output from its buck regulator and a fixed 3.3 V output from its integrated LDO. These values are laser-trimmed at wafer test and require no external feedback components. The part number suffix "1533" explicitly denotes this 1.5 V / 3.3 V configuration, distinguishing it from other variants such as ADP2140ACPZ1218R7 (1.2 V / 1.8 V).

Does the ADP2140ACPZ1533R7 support independent enable control for each regulator?

Yes, the ADP2140ACPZ1533R7 supports independent enable control via EN1 (buck) and EN2 (LDO). When EN2 is left unconnected, the device enters autosequencing mode: EN1's rising edge starts the buck regulator, and the LDO enables after a fixed 5 ms delay (tDELAY). This behavior is confirmed in the datasheet's "Power Sequencing" section and Figure 41.

What is the minimum input voltage required for the ADP2140ACPZ1533R7 to regulate both outputs?

The ADP2140ACPZ1533R7 requires a minimum VIN1 of 2.3 V to operate the buck regulator. For the 3.3 V LDO, VIN2 must be ≥3.6 V (3.3 V + 0.3 V minimum headroom per datasheet Table 1). Since VIN2 is typically supplied externally (not from the 1.5 V buck output), the system must provide ≥3.6 V to PIN 5 (VIN2) - meaning the 1.5 V buck output cannot power the 3.3 V LDO in this variant.

How does the ADP2140ACPZ1533R7 manage thermal performance in compact layouts?

The ADP2140ACPZ1533R7 uses a 10-lead 3 mm × 3 mm LFCSP package with an exposed thermal pad (EP) internally connected to PGND. To maintain TJ ≤ 125°C, the EP must be soldered to a dedicated PCB ground plane with ≥4 thermal vias. Datasheet Table 4 specifies θJA = 35.3°C/W on a 4-layer board - derating is required for 2-layer boards or higher ambient temperatures.

Is the power-good (PG) signal on the ADP2140ACPZ1533R7 asserted only after both outputs stabilize?

Yes, the open-drain PG pin on the ADP2140ACPZ1533R7 remains low until both the 1.5 V buck output and 3.3 V LDO output rise above 92% of their nominal values. It stays high until either output falls below 86% of nominal, providing synchronized system reset signaling. This dual-rail monitoring is explicitly defined in the "Power Good" section of the datasheet (Table 1, PGRISE/PGFALL).