Analog Devices Inc. ADP2118ACPZ-1.2-R7

Overview

ADP2118ACPZ-1.2-R7 from Analog Devices is a synchronous step-down DC-DC regulator delivering 3 A continuous output at fixed 1.2 V, operating from 2.3 V–5.5 V input with ±1.5% output accuracy, 1.2 MHz switching frequency, and integrated 75 mΩ/40 mΩ power FETs. It serves as a high-efficiency point-of-load voltage source for FPGA core rails, microprocessor I/O supplies, and portable instrumentation.

For engineers reviewing the ADP2118ACPZ-1.2-R7 datasheet, ADP2118ACPZ-1.2-R7 pinout, ADP2118ACPZ-1.2-R7 application, or ADP2118ACPZ-1.2-R7 equivalent, key selection criteria include its fixed 1.2 V output, 16-lead 4 mm × 4 mm LFCSP package, PFM/PWM mode selectability, precision enable threshold (1.2 V typ), and power-good signaling with 105–115% FB rising threshold.

Technical Context

The ADP2118ACPZ-1.2-R7 implements a current-mode, constant-frequency PWM control architecture with slope compensation to ensure stability up to 100% duty cycle. Its integrated P-channel high-side switch and N-channel synchronous rectifier eliminate external diode losses and support seamless transition between PWM and PFM modes based on load current.

It features a precision 0.6 V internal reference, tracking input (TRK) for coordinated rail sequencing, and robust protection including UVLO (2.2 V rising), OCP (5.2 A peak), OVP (0.66 V FB threshold), and thermal shutdown (140°C). The device starts into precharged outputs and supports external synchronization from 600 kHz to 1.4 MHz with selectable 0° or 180° phase shift.

Key Specifications

Pinout & Package

ADP2118ACPZ-1.2-R7 is housed in a thermally enhanced 16-lead, 4 mm × 4 mm LFCSP package with exposed pad soldered to PGND for optimal thermal dissipation (θ_JA = 38.3°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS62130ARGTR and RT7297BGS, ADP2118ACPZ-1.2-R7 offers unique integration of voltage tracking, PFM mode, and precision 1.2 V fixed output in a thermally optimized LFCSP - making it optimal for space-constrained, multi-rail, battery-sensitive applications requiring coordinated startup and ultra-low light-load quiescent current.

Availability

ADP2118ACPZ-1.2-R7 is available at Aetrix Electronics and suitable for FPGA core power supply, portable medical instrumentation, and industrial PLC I/O modules requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for ADP2118ACPZ-1.2-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 Norwood, MA, serving precision instrumentation, communications, and industrial markets since 1965.

The ADP2118 belongs to Analog Devices' Power Management portfolio, designed specifically for high-efficiency, small-footprint point-of-load regulation in space- and thermal-constrained digital systems such as FPGAs, SoCs, and portable medical devices.

FAQ

What is the output voltage tolerance of the ADP2118ACPZ-1.2-R7?

The ADP2118ACPZ-1.2-R7 delivers a fixed 1.2 V output with ±1.5% initial accuracy over temperature and line, verified across −40°C to +125°C junction range. This tolerance is guaranteed by internal trimming and does not require external calibration. The ADP2118ACPZ-1.2-R7 maintains this accuracy under full 3 A load and 2.3 V–5.5 V input variation, making it suitable for noise-sensitive digital core supplies.

Does the ADP2118ACPZ-1.2-R7 support external synchronization?

Yes, the ADP2118ACPZ-1.2-R7 supports external clock synchronization via the SYNC/MODE pin, accepting frequencies from 600 kHz to 1.4 MHz. When synchronized, the ADP2118ACPZ-1.2-R7 operates exclusively in continuous conduction mode (CCM). Phase alignment (0° or 180°) is controlled by the FREQ pin state - low for in-phase, high for 180° out-of-phase - enabling noise cancellation in multi-regulator systems.

Can the ADP2118ACPZ-1.2-R7 start up into a precharged output?

Yes, the ADP2118ACPZ-1.2-R7 includes dedicated circuitry to safely start into a precharged output. It monitors the FB pin voltage during soft start and prevents reverse inductor current that would otherwise discharge the output capacitor. This feature is critical in hot-swap and redundant power systems where the output may already be biased before the ADP2118ACPZ-1.2-R7 is enabled.

What protection features are integrated into the ADP2118ACPZ-1.2-R7?

The ADP2118ACPZ-1.2-R7 integrates undervoltage lockout (UVLO), overvoltage protection (OVP), overcurrent protection (OCP), and thermal shutdown (TSD). UVLO triggers at 2.2 V (rising) to prevent erratic operation; OVP activates if FB exceeds 0.66 V; OCP limits peak switch current to 5.2 A; TSD disables the regulator above 140°C with 15°C hysteresis. All protections operate autonomously without external components.

Is the ADP2118ACPZ-1.2-R7 pin-compatible with other ADP2118 variants?

Yes, all ADP2118 variants - including ADP2118ACPZ-1.2-R7, ADP2118ACPZ-3.3-R7, and ADP2118ACPZ-R7 (adjustable) - share identical 16-lead 4 mm × 4 mm LFCSP packaging and pinout. The only differences are internal feedback resistor networks and factory-trimmed output voltage; no PCB redesign is needed when substituting between fixed-output versions or migrating to the adjustable variant.