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

Analog Devices Inc. ADP1874ARQZ-0.3-R7

Name: ADP1874ARQZ-0.3-R7
Brand: Analog Devices Inc.
SKU: ADP1874ARQZ-0.3-R7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ADP1874ARQZ-0.3-R7

Manufacturer:: Analog Devices Inc.

Category:: DC DC Switching Controllers

Package:: 16-SSOP (0.154", 3.90mm Width)

Datasheet:: ADP1874ARQZ-0.3-R7.pdf

Description:: IC REG CTRLR BUCK 16QSOP

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Product details

Overview

ADP1874ARQZ-0.3-R7 from Analog Devices is a synchronous buck controller implementing constant on-time and valley current mode control for high-efficiency DC/DC conversion. It operates from 2.95 V to 20 V input, delivers 0.6 V output with ±1.0% reference accuracy, supports all-N-channel MOSFET power stages, and features integrated bootstrap diode and internal 5 V LDO bias regulator-used in telecom server core supplies requiring tight regulation and fast transient response.

For engineers reviewing the ADP1874ARQZ-0.3-R7 datasheet, ADP1874ARQZ-0.3-R7 pinout, ADP1874ARQZ-0.3-R7 application, or ADP1874ARQZ-0.3-R7 equivalent, key selection considerations include its 300 kHz switching frequency, valley current sensing without external sense resistor, precision enable threshold (570–680 mV), thermal shutdown at 155°C, and QSOP-16 package compatibility with high-density PCB layouts.

Technical Context

The ADP1874ARQZ-0.3-R7 uses a pseudo-fixed-frequency constant on-time architecture combined with valley current-mode control to achieve optimal stability and transient response at low duty cycles. Its current-sense gain is programmable via external RES resistor (e.g., 47 kΩ yields 3.0 V/V gain), and it integrates a 5 V internal LDO (VREG) with 104°C/W θ_JA for gate driver biasing.

It enables start-up into precharged outputs via soft-start capacitor programming (10 nF/ms), provides open-drain PGOOD with internal pull-up, and implements hiccup-mode short-circuit protection with 6 ms timing. The controller supports voltage tracking and operates across −40°C to +125°C junction temperature.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	2.95 V to 20 V - supports wide-input industrial and telecom rails without external regulators.
Switching Frequency	300 kHz - fixed nominal frequency enabling predictable EMI filtering and inductor sizing.
Reference Voltage	0.6 V ±1.0% - enables precise low-voltage core supply regulation down to sub-1 V with minimal drift over temperature.
Current Sense	No external sense resistor required - valley current sensing via DRVL pin reduces BOM count and power loss.
VREG Output	5 V ±0.2 V (typical) - powers high-side and low-side drivers; dropout ≤415 mV at 100 mA ensures robust gate drive under load.
Thermal Shutdown	155°C with 15°C hysteresis - protects against sustained overload while allowing recovery after cooling.
Enable Threshold	570–680 mV logic-high with 31 mV hysteresis - enables clean, noise-immune power sequencing in multi-rail systems.

Pinout & Package

ADP1874ARQZ-0.3-R7 is housed in a 16-lead QSOP package (3.9 mm × 4.9 mm, 1.0 mm height), optimized for thermal performance and high-density layout. Pin pitch is 0.65 mm, and PGND/GND separation supports clean analog/digital grounding.

Pin/Terminal	Circuit Role	Design Meaning
VIN	High-side input supply	Connects to drain of upper N-MOSFET; withstands up to 28 V absolute max.
COMP	Error amplifier output	Interface for Type II/III compensation network to stabilize loop dynamics.
EN	Standalone enable input	Logic-controlled startup; pulls low to disable; no external pull-down needed.
FB	Feedback node	Monitors output via resistor divider; 0.6 V reference sets regulated VOUT.
BST	Bootstrap supply	Charges boot capacitor for high-side gate drive; includes integrated rectifier diode.
SW	Switch node	Connection point between high- and low-side FETs; critical for layout EMI control.
DRVH	High-side gate driver	Drives upper N-MOSFET gate; 2.25 Ω source / 0.7 Ω sink resistance ensures fast edge rates.
DRVL	Low-side gate driver & current sense	Drives lower N-MOSFET and serves as current-sense amplifier input (no shunt required).
PGND	Power ground	Return path for low-side FET and gate drivers; must be separate from analog GND.
GND	Analog ground	Reference for FB, COMP, RES, SS; requires dedicated low-noise ground plane.
RES	Current gain programming	Resistor to GND sets current-sense gain (e.g., 47 kΩ → 3.0 V/V) for accurate current limit.
PGOOD	Open-drain status output	Sinks current when FB out-of-regulation or thermal fault occurs; requires external pull-up to VREG.
VREG	Internal LDO output	5 V bias for drivers; bypassed with 1 µF to PGND and 0.1 µF to GND.
VREG_IN	LDO input	Tied directly to VREG pin; not externally connected.
SS	Soft-start timing	Capacitor to GND sets ramp time (10 nF = 1 ms); prevents inrush and reverse current.
TRACK	Voltage tracking input	Enables coordinated power-up with master rail; offset = VFB − VTRACK = 63 mV.

Key Features

Feature	Design Value
Valley current mode control	Enables stable operation at ultra-low duty cycles (e.g., 0.8 V out from 16.5 V in) without sub-harmonic oscillation.
Integrated bootstrap diode	Eliminates external Schottky diode in most designs, reducing component count and board area.
Start-up into precharged output	Prevents reverse current flow during hot-insertion or system wake-up from sleep states.
Resistor-programmable current limit	Allows precise overcurrent protection tuning (±1% resistor) without changing IC or layout.
Thermal overload & short-circuit protection	Hiccup-mode shutdown (6 ms off-time) limits average power dissipation during fault conditions.

Applications

Telecom Core Supply	Server DDR Memory Rail
Use Scenario: Regulating 0.8 V or 1.2 V for FPGA or ASIC cores in 48 V intermediate bus telecom systems. IC Role / Device Role / Timing Role: Primary synchronous buck controller managing high-current, low-voltage conversion with fast load-step response. Use Value: Achieves >90% efficiency at 12 A load (VOUT = 0.8 V, VIN = 13 V) with 300 kHz switching, minimizing thermal stress in compact modules.	Use Scenario: Powering DDR4/DDR5 memory VDDQ rails requiring tight voltage tolerance and dynamic current delivery. IC Role / Device Role / Timing Role: Constant on-time valley current controller ensuring stable regulation during rapid memory access bursts. Use Value: ±1.0% reference accuracy and −40°C to +125°C operation guarantee compliance with JEDEC DDR voltage specs across environmental extremes.
Set-Top Box SoC Power	DSP Processor Core Supply
Use Scenario: Delivering 1.0 V or 1.1 V to multimedia SoCs in consumer set-top boxes with variable processing loads. IC Role / Device Role / Timing Role: Synchronous buck controller with programmable soft-start and tracking for clean multi-rail sequencing. Use Value: TRACK pin enables synchronized ramp-up with I/O supply, preventing latch-up during power-on reset sequences.	Use Scenario: Generating 1.8 V core voltage for high-performance DSPs in industrial motor control or audio processing units. IC Role / Device Role / Timing Role: Valley current-mode controller providing low-noise, high-PSRR regulation for sensitive analog signal paths. Use Value: Integrated 5 V LDO (VREG) eliminates need for external bias supply, simplifying BOM and improving PSRR above 100 kHz.

Telecom Core Supply

Server DDR Memory Rail

Use Scenario: Regulating 0.8 V or 1.2 V for FPGA or ASIC cores in 48 V intermediate bus telecom systems.

IC Role / Device Role / Timing Role: Primary synchronous buck controller managing high-current, low-voltage conversion with fast load-step response.

Use Value: Achieves >90% efficiency at 12 A load (VOUT = 0.8 V, VIN = 13 V) with 300 kHz switching, minimizing thermal stress in compact modules.

Use Scenario: Powering DDR4/DDR5 memory VDDQ rails requiring tight voltage tolerance and dynamic current delivery.

IC Role / Device Role / Timing Role: Constant on-time valley current controller ensuring stable regulation during rapid memory access bursts.

Use Value: ±1.0% reference accuracy and −40°C to +125°C operation guarantee compliance with JEDEC DDR voltage specs across environmental extremes.

Set-Top Box SoC Power

DSP Processor Core Supply

Use Scenario: Delivering 1.0 V or 1.1 V to multimedia SoCs in consumer set-top boxes with variable processing loads.

IC Role / Device Role / Timing Role: Synchronous buck controller with programmable soft-start and tracking for clean multi-rail sequencing.

Use Value: TRACK pin enables synchronized ramp-up with I/O supply, preventing latch-up during power-on reset sequences.

Use Scenario: Generating 1.8 V core voltage for high-performance DSPs in industrial motor control or audio processing units.

IC Role / Device Role / Timing Role: Valley current-mode controller providing low-noise, high-PSRR regulation for sensitive analog signal paths.

Use Value: Integrated 5 V LDO (VREG) eliminates need for external bias supply, simplifying BOM and improving PSRR above 100 kHz.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM5116PWPR	Wide-input (3 V to 100 V), current-mode controller with adjustable slope compensation; no integrated bootstrap diode.	Targeted at higher-VIN industrial/motor drives; lacks valley current sensing and precharge-start capability.	Select LM5116PWPR only when input exceeds 20 V or when external high-voltage gate drive is required.
TPS40200DGQR	Voltage-mode controller with 4.5–28 V input; requires external current-sense resistor; no integrated VREG or bootstrap diode.	Suited for cost-sensitive, non-precharged applications where layout simplicity outweighs efficiency optimization.	Choose TPS40200DGQR if BOM cost is prioritized over efficiency, thermal performance, or sequencing flexibility.

Compared with LM5116PWPR and TPS40200DGQR, ADP1874ARQZ-0.3-R7 delivers superior light-load efficiency via valley current sensing, eliminates two external components (bootstrap diode and sense resistor), and enables reliable hot-plug operation-making it optimal for space-constrained, high-reliability telecom and server applications.

Availability

ADP1874ARQZ-0.3-R7 is available at Aetrix Electronics and suitable for telecom infrastructure, server power management, and embedded DSP systems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for ADP1874ARQZ-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The ADP1874/ADP1875 product line was engineered for high-efficiency, high-density DC/DC conversion in telecom and computing applications-emphasizing valley current control, integrated biasing, and robust fault protection.

FAQ

What is the switching frequency of the ADP1874ARQZ-0.3-R7?

The ADP1874ARQZ-0.3-R7 is factory-configured for a nominal 300 kHz switching frequency. This value remains stable across load and input voltage variations, with typical deviation within ±10% under full operating conditions (−40°C to +125°C, VIN = 2.95 V to 20 V). Frequency is not user-adjustable but is selected at manufacture via internal trimming.

Does the ADP1874ARQZ-0.3-R7 require an external current-sense resistor?

No, the ADP1874ARQZ-0.3-R7 does not require an external current-sense resistor. It implements valley current sensing using the low-side MOSFET's R_DS(on) as the sense element, with gain programmable via the RES pin (e.g., 47 kΩ sets 3.0 V/V gain). This eliminates power loss and board space associated with shunt resistors.

Can the ADP1874ARQZ-0.3-R7 start up into a precharged output?

Yes, the ADP1874ARQZ-0.3-R7 supports start-up into a precharged output. Its valley current-mode architecture and dedicated soft-start circuitry prevent reverse current flow by disabling the high-side FET until the feedback voltage rises above the 0.6 V reference, ensuring safe hot-plug operation in modular power systems.

What is the purpose of the TRACK pin on the ADP1874ARQZ-0.3-R7?

The TRACK pin on the ADP1874ARQZ-0.3-R7 enables voltage tracking for coordinated power sequencing. When a master supply voltage is applied to TRACK, the ADP1874ARQZ-0.3-R7 regulates its output to follow that voltage with a fixed 63 mV offset (V_FB − V_TRACK). This ensures controlled ramp-up relative to I/O or auxiliary rails, preventing latch-up in multi-supply SoCs.

Is the ADP1874ARQZ-0.3-R7 pin-compatible with other members of the ADP1874/ADP1875 family?

Yes, the ADP1874ARQZ-0.3-R7 shares identical pinout and package (16-lead QSOP) with all ADP1874/ADP1875 variants, including ADP1874ARQZ-0.6-R7 and ADP1874ARQZ-1.0-R7. Frequency selection is internal and does not affect pin function, enabling drop-in replacement across 300 kHz, 600 kHz, and 1.0 MHz versions for design reuse.

ADP1874ARQZ-0.3-R7 Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: -

Package/Case:: 16-SSOP (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

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, Tracking

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 16-QSOP

ADP1874ARQZ-0.3-R7 FAQ

1.How can I place an order for ADP1874ARQZ-0.3-R7 through Aetrix?

Please submit a Request for Quotation (RFQ) for ADP1874ARQZ-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 ADP1874ARQZ-0.3-R7 reliable?

The price and inventory of ADP1874ARQZ-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 ADP1874ARQZ-0.3-R7 is usually 5 days.

3.What payment methods are accepted for ADP1874ARQZ-0.3-R7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP1874ARQZ-0.3-R7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ADP1874ARQZ-0.3-R7?

ADP1874ARQZ-0.3-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ADP1874ARQZ-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 ADP1874ARQZ-0.3-R7?

For technical support, including ADP1874ARQZ-0.3-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP1874ARQZ-0.3-R7 requirements.

6.How does Aetrix verify that ADP1874ARQZ-0.3-R7 is sourced from the original manufacturer or authorized distributors?

All ADP1874ARQZ-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 ADP1874ARQZ-0.3-R7 meets industry standards.

7.What is the process for return or replacement of ADP1874ARQZ-0.3-R7?

All ADP1874ARQZ-0.3-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP1874ARQZ-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 ADP1874ARQZ-0.3-R7 part is unused and in its original packaging.

Return procedure for ADP1874ARQZ-0.3-R7:

1.Submit a request within 90 days.

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

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