Analog Devices Inc. ADP2140ACPZ3315R7

Overview

ADP2140ACPZ3315R7 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 buck output from 1.0 V to 3.3 V and LDO output from 0.8 V to 3.3 V, and supports mobile phone power rail sequencing with <20 μA quiescent current in PSM mode.

For engineers reviewing the ADP2140ACPZ3315R7 datasheet, ADP2140ACPZ3315R7 pinout, ADP2140ACPZ3315R7 application, or ADP2140ACPZ3315R7 equivalent, key selection criteria include its dual-regulator architecture, 3 MHz switching frequency, 110 mV dropout at 300 mA LDO load, 65 dB PSRR at 10 kHz, and autosequencing enable logic for portable system power-up control.

Technical Context

The ADP2140ACPZ3315R7 implements a high-speed current-mode PWM buck controller with variable-frequency power-save mode (PSM) for light-load efficiency, plus an independent low-quiescent-current LDO section capable of split-supply operation with VIN2 as low as 1.65 V. Its proprietary control scheme ensures stable regulation across −40°C to +125°C junction temperature.

Power sequencing is configurable via EN1/EN2 pins: autosequencing enables the higher-voltage output first, while logic-controlled sequencing allows independent activation. The integrated power-good (PG) open-drain signal monitors both outputs simultaneously, asserting high only when both VOUT and VOUT2 exceed 92% of nominal value.

Key Specifications

Pinout & Package

ADP2140ACPZ3315R7 uses a 10-lead 3 mm × 3 mm LFCSP package with exposed thermal pad electrically connected to PGND. The pad must be soldered to a PCB ground plane for thermal performance and electrical stability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS62748YFPR and MAX20004AATP+, ADP2140ACPZ3315R7 uniquely combines 600 mA buck current, programmable dual outputs, autosequencing, and sub-22 μA LDO quiescent current-making it optimal for space-constrained, battery-sensitive mobile designs requiring coordinated power-up.

Availability

ADP2140ACPZ3315R7 is available at Aetrix Electronics and suitable for mobile phones, digital cameras, portable audio devices, and wearable electronics requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for ADP2140ACPZ3315R7 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.

The ADP2140ACPZ3315R7 belongs to Analog Devices' Power Management portfolio, designed specifically for ultra-low-power, multi-rail portable electronics where small footprint, high efficiency, and precise sequencing are critical.

FAQ

What is the recommended input capacitor for ADP2140ACPZ3315R7?

The ADP2140ACPZ3315R7 requires a minimum 10 µF X7R/X5R ceramic input capacitor (CIN) placed close to VIN1 and PGND pins. This value ensures stable operation across −40°C to +125°C and meets ripple current and ESR requirements (0.001–0.01 Ω). Y5V/Z5U capacitors are not recommended due to capacitance drift.

Does ADP2140ACPZ3315R7 support independent enable control of buck and LDO sections?

Yes, ADP2140ACPZ3315R7 supports independent control: EN1 enables the buck regulator, and EN2 enables the LDO. When EN2 is left floating, the device enters autosequencing mode where EN1 triggers buck first, followed by LDO after a 5 ms internal delay-no external timing components needed.

What is the maximum allowable junction temperature for ADP2140ACPZ3315R7?

The ADP2140ACPZ3315R7 has a maximum operating junction temperature of +125°C. Thermal shutdown activates at +150°C (with 20°C hysteresis), but continuous operation above +125°C risks reliability degradation. Designers must calculate TJ using θJA = 35.3°C/W and ensure adequate PCB copper area under the exposed pad.

Can ADP2140ACPZ3315R7's LDO be powered directly from its own buck output?

Yes, ADP2140ACPZ3315R7's LDO (VIN2) can be powered from the buck output (VOUT), enabling efficient cascade regulation-for example, 3.3 V buck → 1.8 V LDO. This configuration leverages the LDO's 65 dB PSRR to filter buck switching noise, provided VIN2 ≥ VOUT2 + 0.3 V and dropout margin is maintained.

How does the power-good (PG) pin of ADP2140ACPZ3315R7 behave during startup and fault conditions?

The ADP2140ACPZ3315R7 PG pin is an open-drain output that remains low until both VOUT and VOUT2 reach ≥92% of their nominal values, then goes high. It falls low again if either output drops below 86% of nominal. PG asserts high only after both rails stabilize-providing reliable system reset signaling without external monitoring.