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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > DC DC Switching Controllers

Analog Devices Inc. ADP1878ACPZ-0.3-R7

Name: ADP1878ACPZ-0.3-R7
Brand: Analog Devices Inc.
SKU: ADP1878ACPZ-0.3-R7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ADP1878ACPZ-0.3-R7

Manufacturer:: Analog Devices Inc.

Category:: DC DC Switching Controllers

Package:: 14-WFDFN Exposed Pad, CSP

Datasheet:: ADP1878ACPZ-0.3-R7.pdf

Description:: IC REG CTRLR BUCK 14LFCSP

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Product details

Overview

ADP1878ACPZ-0.3-R7 from Analog Devices is a synchronous buck controller implementing constant-on-time valley current-mode control for high-efficiency DC/DC conversion in telecom and server power supplies. It operates from 2.95 V to 20 V input, delivers output down to 0.6 V with ±1.0% reference accuracy, and features integrated bootstrap diode, precision enable, and thermal shutdown. Designed for 300 kHz switching, it drives all-N-channel MOSFET stages in high-current, low-duty-cycle applications such as DSP core supplies.

For engineers reviewing the ADP1878ACPZ-0.3-R7 datasheet, ADP1878ACPZ-0.3-R7 pinout, ADP1878ACPZ-0.3-R7 application, or ADP1878ACPZ-0.3-R7 equivalent, key selection criteria include its 300 kHz fixed-frequency operation, valley current sensing without external sense resistor, 14-lead LFCSP_WD package, and compatibility with precharged outputs-critical for reliable startup in multi-rail systems.

Technical Context

The ADP1878ACPZ-0.3-R7 uses a valley current-mode architecture with pseudo-fixed-frequency constant-on-time control, enabling stable regulation at low duty cycles (e.g., 0.8 V out from 13 V in). Its internal 5 V LDO (VREG) powers gate drivers and bias circuitry, while the RES pin sets current-sense gain via external resistor selection (47 kΩ yields 3 V/V gain).

It integrates a bootstrap diode between VREG and BST, supports soft-start via external SS capacitor (10 nF/ms), and provides power-good monitoring with internal pull-up. Unlike the ADP1879 variant, this part lacks power-saving mode (PSM), operating exclusively in forced PWM for predictable timing and ripple control.

Key Specifications

Parameter	Value and Actual Design Meaning
Switching Frequency	300 kHz nominal - enables optimized magnetics size and EMI filtering for mid-power telecom/server rails.
Input Voltage Range	2.95 V to 20 V - supports wide-input industrial and telecom power buses including 3.3 V, 5 V, 12 V, and 16.5 V sources.
Output Voltage Accuracy	±1.0% over −40°C to +125°C - ensures tight regulation for sensitive DSP/FPGA core supplies without trimming.
Reference Voltage	0.600 V ±6 mV - enables precise feedback for sub-1 V outputs using standard resistor dividers.
Current Sense Gain	Programmable (e.g., 3 V/V with 47 kΩ RES-to-PGND) - allows accurate overcurrent protection without sense resistor losses.
Driver Output Capability	DRVH source/sink: 2.2 Ω / 0.72 Ω; DRVL source/sink: 1.5 Ω / 0.7 Ω - drives high-side and low-side N-MOSFETs with fast rise/fall times (≤25 ns).
Thermal Protection	155°C shutdown with 15°C hysteresis - prevents latch-up during sustained overload or poor heatsinking in dense PCB layouts.

Pinout & Package

ADP1878ACPZ-0.3-R7 is housed in a 14-lead LFCSP_WD (4 mm × 4 mm, 0.8 mm height) with exposed pad thermally connected to GND. The package supports high-power density and efficient heat dissipation in compact power modules.

Pin/Terminal	Circuit Role	Design Meaning
VIN	High-side input supply	Connects to drain of high-side N-MOSFET; accepts up to 20 V with UVLO at 2.65 V.
COMP	Error amplifier output	Interface for Type II/III compensation network to stabilize loop response and transient performance.
EN	Precision enable input	Logic-high threshold 634 mV ±31 mV; enables sequencing and system-level power management.
FB	Feedback node	Non-inverting input tied to resistor divider; regulates output by comparing against 0.6 V reference.
GND	Analog ground reference	Separate analog return for sensitive circuitry; must be isolated from PGND except at single-point connection.
RES	Current-sense gain programming	Resistor to PGND sets gain (e.g., 47 kΩ → 3 V/V) for valley current limit detection.
VREG	Internal 5 V LDO output	Bias supply for drivers and internal logic; not for external loading; requires 1 µF + 0.1 µF bypassing.
SS	Soft-start timing	Capacitor to GND sets ramp time (10 nF = 1 ms); prevents inrush and enables reverse-current protection.
PGOOD	Open-drain power-good flag	Sinks current when FB is out-of-regulation or thermal shutdown occurs; requires 3 kΩ pull-up to VREG.
DRVL	Low-side gate driver	Drives source of low-side N-MOSFET; also serves as current-sense gain setting node (shared with RES).
PGND	Power ground return	Return path for low-side driver and MOSFET source; separates high-current paths from analog ground.
DRVH	High-side gate driver	Drives gate of high-side N-MOSFET via bootstrap capacitor (BST–SW); includes integrated rectifier.
SW	Switch node	Connection point between high- and low-side MOSFETs; critical for layout; ties to BST capacitor and inductor.
BST	Bootstrap supply	Connected to SW via capacitor; internal diode charges BST from VREG to sustain high-side drive.

Key Features

Feature	Design Value
No external current sense resistor	Valley current sensing via RES pin eliminates I_SENSE resistor losses and board space, improving efficiency at high currents.
Integrated bootstrap diode	Reduces external component count by embedding the charge-pump diode between VREG and BST, simplifying high-side drive design.
Starts into precharged output	Enables safe startup when output capacitor is already charged (e.g., hot-swap or rail sequencing), avoiding reverse current flow.
Standalone precision enable	0.634 V threshold with 31 mV hysteresis allows direct interface with FPGA I/O or microcontroller GPIO without level-shifting.
Thermal and short-circuit protection	Hiccup-mode current limiting (6 ms timeout) and 155°C thermal shutdown prevent damage during fault conditions.

Applications

Telecom Power Supply	DSP Core Voltage Regulation
Use Scenario: Point-of-load (POL) conversion in 48 V telecom rectifier systems delivering 3.3 V or 1.2 V to line cards. IC Role / Device Role / Timing Role: Synchronous buck controller managing high-current, low-voltage rails with fast transient response to burst traffic loads. Use Value: 300 kHz operation balances efficiency and filter size; valley current mode ensures stability under dynamic load steps typical in packet processing.	Use Scenario: Regulating core voltage for TI C6000 or Analog Devices SHARC DSPs requiring ≤1.2 V at up to 12 A. IC Role / Device Role / Timing Role: Primary DC/DC controller providing tightly regulated, low-noise supply with <±1% accuracy across temperature. Use Value: 0.6 V reference and ±1% tolerance eliminate need for post-regulation trimming; supports rapid power-state transitions without droop.
Mid-to-High End Server VRM	Set-Top Box SoC Power
Use Scenario: CPU/GPU core supply in rack-mounted servers where thermal density and efficiency are critical. IC Role / Device Role / Timing Role: High-efficiency synchronous buck controller driving dual-phase N-MOSFET stages with programmable current limit. Use Value: Integrated VREG and bootstrap diode reduce BOM count; 14-lead LFCSP_WD enables compact, thermally robust layout near processor.	Use Scenario: Powering Broadcom or MediaTek SoCs in cable/satellite STBs requiring 1.1 V core and 1.8 V I/O rails. IC Role / Device Role / Timing Role: Primary POL controller supporting light-load efficiency via forced PWM and seamless sequencing with standby modes. Use Value: Precision enable and soft-start ensure clean power-up of multiple SoC domains; PGOOD flag synchronizes firmware initialization.

Telecom Power Supply

DSP Core Voltage Regulation

Use Scenario: Point-of-load (POL) conversion in 48 V telecom rectifier systems delivering 3.3 V or 1.2 V to line cards.

IC Role / Device Role / Timing Role: Synchronous buck controller managing high-current, low-voltage rails with fast transient response to burst traffic loads.

Use Value: 300 kHz operation balances efficiency and filter size; valley current mode ensures stability under dynamic load steps typical in packet processing.

Use Scenario: Regulating core voltage for TI C6000 or Analog Devices SHARC DSPs requiring ≤1.2 V at up to 12 A.

IC Role / Device Role / Timing Role: Primary DC/DC controller providing tightly regulated, low-noise supply with <±1% accuracy across temperature.

Use Value: 0.6 V reference and ±1% tolerance eliminate need for post-regulation trimming; supports rapid power-state transitions without droop.

Mid-to-High End Server VRM

Set-Top Box SoC Power

Use Scenario: CPU/GPU core supply in rack-mounted servers where thermal density and efficiency are critical.

IC Role / Device Role / Timing Role: High-efficiency synchronous buck controller driving dual-phase N-MOSFET stages with programmable current limit.

Use Value: Integrated VREG and bootstrap diode reduce BOM count; 14-lead LFCSP_WD enables compact, thermally robust layout near processor.

Use Scenario: Powering Broadcom or MediaTek SoCs in cable/satellite STBs requiring 1.1 V core and 1.8 V I/O rails.

IC Role / Device Role / Timing Role: Primary POL controller supporting light-load efficiency via forced PWM and seamless sequencing with standby modes.

Use Value: Precision enable and soft-start ensure clean power-up of multiple SoC domains; PGOOD flag synchronizes firmware initialization.

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous buck controller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ADP1879ACPZ-0.3-R7	Identical pinout and specs except adds power-saving mode (PSM) for pulse-skipping at light loads.	Preferred where >10% load range includes very light/no-load conditions (e.g., standby power in consumer devices).	Select ADP1879ACPZ-0.3-R7 only if PSM-driven efficiency improvement at <100 mA is required; otherwise ADP1878ACPZ-0.3-R7 offers simpler PWM timing.
LM5116PWPR	Wider input range (3 V to 100 V), no integrated bootstrap diode, requires external high-side driver support.	Suitable for higher-input industrial or automotive applications where 20 V max is insufficient.	Choose LM5116PWPR only for >20 V inputs or when external bootstrap control is preferred; ADP1878ACPZ-0.3-R7 excels in ≤20 V telecom/server space.

Compared with ADP1879ACPZ-0.3-R7, the ADP1878ACPZ-0.3-R7 avoids PSM-related frequency variation and output ripple modulation, delivering consistent 300 kHz operation ideal for noise-sensitive digital loads. Against LM5116PWPR, it trades input voltage headroom for integration, reducing external components and layout complexity in sub-20 V designs.

Availability

ADP1878ACPZ-0.3-R7 is available at Aetrix Electronics and suitable for telecom infrastructure, server VRMs, and set-top box SoC power supplies requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for ADP1878ACPZ-0.3-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.

The ADP1878/ADP1879 product line targets high-efficiency, high-current DC/DC conversion in telecom, computing, and networking equipment, emphasizing integration, thermal robustness, and ease of design for demanding POL applications.

FAQ

What is the switching frequency of the ADP1878ACPZ-0.3-R7?

The ADP1878ACPZ-0.3-R7 is factory-configured for a nominal switching frequency of 300 kHz, as indicated by the "-0.3" suffix. This frequency is pseudo-fixed and remains stable across load and input voltage variations within specified limits, enabling predictable EMI filter design and thermal management in telecom and server power supplies.

Does the ADP1878ACPZ-0.3-R7 support power-saving mode (PSM)?

No, the ADP1878ACPZ-0.3-R7 does not include power-saving mode. That feature is exclusive to the ADP1879ACPZ-0.3-R7 variant. The ADP1878ACPZ-0.3-R7 operates strictly in forced PWM mode, ensuring constant frequency and minimal output voltage ripple-ideal for noise-sensitive digital loads like DSPs and FPGAs.

Can the ADP1878ACPZ-0.3-R7 start into a precharged output?

Yes, the ADP1878ACPZ-0.3-R7 supports startup into a precharged output. Its control architecture prevents reverse current flow during initial turn-on, making it suitable for hot-swap applications and multi-rail systems where sequencing must avoid backfeeding powered-down sections.

What package type is used for the ADP1878ACPZ-0.3-R7?

The ADP1878ACPZ-0.3-R7 is packaged in a 14-lead LFCSP_WD (4 mm × 4 mm, 0.8 mm height) with an exposed thermal pad. This package provides excellent thermal performance and compact footprint for high-density power modules, and requires soldering the exposed pad directly to the GND plane per Analog Devices' layout guidelines.

How is current limit configured on the ADP1878ACPZ-0.3-R7?

Current limit is configured via an external resistor connected between the RES pin and PGND. For example, a 47 kΩ ±1% resistor sets the current-sense amplifier gain to 3 V/V, enabling accurate valley current detection without an external sense resistor-reducing losses and board area while maintaining protection integrity in the ADP1878ACPZ-0.3-R7.

ADP1878ACPZ-0.3-R7 Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: -

Package/Case:: 14-WFDFN Exposed Pad, CSP

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Output Type:: Transistor Driver

Function:: Step-Down

Output Configuration:: Positive

Topology:: Buck

Number of Outputs:: 1

Output Phases:: 1

Voltage - Supply (Vcc/Vdd):: 2.95V ~ 20V

Frequency - Switching:: 300kHz

Duty Cycle (Max):: 84%

Synchronous Rectifier:: Yes

Clock Sync:: No

Serial Interfaces:: -

Control Features:: Enable, Power Good, Soft Start

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-LFCSP-WD (4x3)

ADP1878ACPZ-0.3-R7 FAQ

1.How can I place an order for ADP1878ACPZ-0.3-R7 through Aetrix?

Please submit a Request for Quotation (RFQ) for ADP1878ACPZ-0.3-R7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for ADP1878ACPZ-0.3-R7 reliable?

The price and inventory of ADP1878ACPZ-0.3-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP1878ACPZ-0.3-R7 is usually 5 days.

3.What payment methods are accepted for ADP1878ACPZ-0.3-R7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP1878ACPZ-0.3-R7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ADP1878ACPZ-0.3-R7?

ADP1878ACPZ-0.3-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ADP1878ACPZ-0.3-R7 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for ADP1878ACPZ-0.3-R7?

For technical support, including ADP1878ACPZ-0.3-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP1878ACPZ-0.3-R7 requirements.

6.How does Aetrix verify that ADP1878ACPZ-0.3-R7 is sourced from the original manufacturer or authorized distributors?

All ADP1878ACPZ-0.3-R7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADP1878ACPZ-0.3-R7 meets industry standards.

7.What is the process for return or replacement of ADP1878ACPZ-0.3-R7?

All ADP1878ACPZ-0.3-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP1878ACPZ-0.3-R7, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The ADP1878ACPZ-0.3-R7 part is unused and in its original packaging.

Return procedure for ADP1878ACPZ-0.3-R7:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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