Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Analog Devices Inc. ADP1874ARQZ-1.0-R7

Name: ADP1874ARQZ-1.0-R7
Brand: Analog Devices Inc.
SKU: ADP1874ARQZ-1.0-R7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: ADP1874ARQZ-1.0-R7

Manufacturer:: Analog Devices Inc.

Category:: DC DC Switching Controllers

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

Datasheet:: ADP1874ARQZ-1.0-R7.pdf

Description:: IC REG CTRLR BUCK 16QSOP

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:1,000

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

ADP1874ARQZ-1.0-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 3.25 V to 20 V input, delivers regulated output down to 0.6 V with ±1.0% reference accuracy, supports all-N-channel MOSFET power stages, and features 1.0 MHz switching frequency, integrated bootstrap diode, and thermal overload protection - used in DSP core power supplies and telecom server rails.

For engineers reviewing the ADP1874ARQZ-1.0-R7 datasheet, ADP1874ARQZ-1.0-R7 pinout, ADP1874ARQZ-1.0-R7 application, or ADP1874ARQZ-1.0-R7 equivalent, key selection considerations include its 1.0 MHz fixed-frequency operation, valley current sensing without external sense resistor, precision enable threshold (570–680 mV), soft-start programmability via external capacitor, and QSOP-16 package compatibility with high-density board layouts.

Technical Context

The ADP1874ARQZ-1.0-R7 uses a valley current-mode architecture with pseudo-fixed frequency timing, enabling stable regulation at low duty cycles (down to ~45% max) and fast transient response. Its constant on-time control scheme eliminates need for loop compensation across wide input/output ranges while maintaining tight output voltage accuracy (±1.0% over −40°C to +125°C).

It integrates an internal 5 V LDO (VREG) with 300–415 mV dropout at 100 mA, drives high-side and low-side N-MOSFETs via dedicated DRVH/DRVL outputs with sub-20 ns rise/fall times, and implements hiccup-mode short-circuit protection with 6 ms current-limit timing when COMP reaches 2.4 V.

Key Specifications

Parameter	Value and Actual Design Meaning
Switching Frequency	1.0 MHz - enables compact magnetics and high ripple attenuation in space-constrained applications like server VRMs.
Input Voltage Range	3.25 V to 20 V - supports wide-input industrial and telecom power buses including 5 V, 12 V, and 16.5 V rails.
Output Voltage Accuracy	±1.0% at 25°C, ±1.2% over −40°C to +125°C - ensures reliable core voltage regulation for DSPs and FPGAs.
Reference Voltage	0.600 V ±6 mV - sets minimum output voltage; allows precise scaling of feedback divider for 0.6 V to >7 V outputs.
Enable Threshold	570–680 mV logic-high with 31 mV hysteresis - provides noise-immune startup control compatible with standard GPIOs.
Thermal Shutdown	155°C with 15°C hysteresis - protects against sustained overload or poor heatsinking in enclosed systems.
Quiescent Current	1.1 mA - minimizes standby power loss in always-on subsystems without compromising startup speed.

Pinout & Package

ADP1874ARQZ-1.0-R7 is housed in a 16-lead QSOP package (4.4 mm × 9.9 mm, 1.0 mm height) with exposed pad for thermal enhancement. Pin pitch is 0.65 mm; RoHS-compliant and moisture-sensitive level 3.

Pin/Terminal	Circuit Role	Design Meaning
VIN	High-side input supply	Connects to drain of upper N-MOSFET; accepts up to 20 V with UVLO at 2.65 V rising edge.
COMP	Error amplifier output	Interface for Type II/III compensation network; clamped at 0.47 V (low) and 2.55 V (high) to limit excursion.
EN	Precision enable input	Active-high control with 570–680 mV threshold; hysteresis prevents chatter during marginal bias conditions.
FB	Feedback node	Non-inverting input tied to resistor divider; regulates output by comparing to 0.6 V internal reference.
BST	Bootstrap supply for high-side driver	Internal diode connects VREG to BST; requires external BST–SW capacitor for gate drive voltage boosting.
SW	Switch node	Connection point between upper and lower MOSFETs; carries high dv/dt switching waveform and must be minimized in layout.
DRVH	High-side gate driver output	Drives upper N-MOSFET gate with 2.25 Ω source / 0.7 Ω sink resistance and 25 ns rise time (C_IN = 4.3 nF).
PGND	Power ground return	Low-impedance return path for lower MOSFET source and DRVL output; separate from analog GND to reduce noise coupling.
GND	Analog ground reference	Reference for FB, COMP, RES, SS, TRACK; must be isolated from PGND except at single-point star connection.
DRVL	Low-side gate driver output	Drives lower N-MOSFET gate with 1.6 Ω source / 0.7 Ω sink resistance and 18 ns rise time (C_IN = 4.3 nF).
RES	Current-sense gain programming	External resistor to GND sets gain (2.7–26 V/V); enables accurate current limiting without sense resistor.
PGOOD	Open-drain power-good indicator	Sinks current when FB is out-of-regulation (>568 mV or <542 mV) or during thermal shutdown.
VREG	Internal 5 V bias regulator output	Supplies gate drivers and internal circuitry; bypassed with 1 µF to PGND and 0.1 µF to GND.
VREG_IN	LDO input	Tied directly to VREG pin; not externally connected - internal connection only.
SS	Soft-start timing input	Capacitor to GND programs ramp time (10 nF = 1 ms); prevents inrush current and enables reverse-current protection.
TRACK	Voltage tracking input	Allows synchronized startup with master rail; offset of 63 mV vs. FB enables precise sequencing in multi-rail systems.

Key Features

Feature	Design Value
No current-sense resistor required	Valley current sensing via RES pin resistor eliminates power loss and PCB area for shunt, improving efficiency in high-current designs.
Integrated bootstrap diode	Reduces external component count by embedding charge-pump diode between VREG and BST, simplifying high-side drive design.
Starts into precharged output	Soft-start circuitry actively monitors output voltage during startup, preventing reverse current flow when VOUT > target at power-on.
Resistor-programmable current limit	Single external resistor on RES pin configures current-sense gain (2.7–26 V/V), enabling precise overcurrent protection across load ranges.
Standalone precision enable input	EN pin operates independently of VREG status with tight 570–680 mV threshold and 31 mV hysteresis, supporting direct microcontroller control.

Applications

Telecom Server Core Rail	DSP Processor Power Supply
Use Scenario: Regulating 1.8 V core voltage for high-performance DSPs in 5G baseband units with input derived from 12 V or 16.5 V backplane. IC Role / Device Role / Timing Role: Synchronous buck controller managing all-N-MOSFET power stage with 1.0 MHz switching to minimize output filter size and improve transient response. Use Value: Achieves >90% efficiency at 10 A load (VIN = 13 V, VOUT = 1.8 V) while maintaining ±1.2% output accuracy across −40°C to +125°C junction temperature.	Use Scenario: Providing tightly regulated 0.8 V supply to FPGA I/O banks in optical line cards where sequencing and low-noise operation are critical. IC Role / Device Role / Timing Role: Valley current-mode controller delivering precise soft-start and voltage tracking (via TRACK pin) to coordinate with master 3.3 V rail. Use Value: Enables zero-reverse-current startup into precharged outputs and maintains 0.795–0.807 V output across full load and temperature range per Figure 19.
Mid-Range Network Switch ASIC	Industrial PLC CPU Module
Use Scenario: Generating 5 V intermediate rail from 20 V input in Layer 3 switch line cards operating in extended temperature environments. IC Role / Device Role / Timing Role: High-frequency buck controller using 1.0 MHz operation to shrink inductor size (0.9 µH) and reduce EMI filtering requirements. Use Value: Delivers 92% peak efficiency at 6 A (Figure 12) and sustains regulation with <±0.3% line/load regulation error per Table 1.	Use Scenario: Powering ARM-based CPU cores in ruggedized programmable logic controllers exposed to −40°C cold starts and 85°C ambient operation. IC Role / Device Role / Timing Role: Robust controller with thermal shutdown (155°C), UVLO (2.65 V), and hiccup-mode fault recovery ensuring continuous operation under brownout or overload. Use Value: Maintains stable 1.2 V output (via feedback divider) with <10 mV drift from −40°C to +85°C, verified in Figure 14 and Table 1.

Telecom Server Core Rail

DSP Processor Power Supply

Use Scenario: Regulating 1.8 V core voltage for high-performance DSPs in 5G baseband units with input derived from 12 V or 16.5 V backplane.

IC Role / Device Role / Timing Role: Synchronous buck controller managing all-N-MOSFET power stage with 1.0 MHz switching to minimize output filter size and improve transient response.

Use Value: Achieves >90% efficiency at 10 A load (VIN = 13 V, VOUT = 1.8 V) while maintaining ±1.2% output accuracy across −40°C to +125°C junction temperature.

Use Scenario: Providing tightly regulated 0.8 V supply to FPGA I/O banks in optical line cards where sequencing and low-noise operation are critical.

IC Role / Device Role / Timing Role: Valley current-mode controller delivering precise soft-start and voltage tracking (via TRACK pin) to coordinate with master 3.3 V rail.

Use Value: Enables zero-reverse-current startup into precharged outputs and maintains 0.795–0.807 V output across full load and temperature range per Figure 19.

Mid-Range Network Switch ASIC

Industrial PLC CPU Module

Use Scenario: Generating 5 V intermediate rail from 20 V input in Layer 3 switch line cards operating in extended temperature environments.

IC Role / Device Role / Timing Role: High-frequency buck controller using 1.0 MHz operation to shrink inductor size (0.9 µH) and reduce EMI filtering requirements.

Use Value: Delivers 92% peak efficiency at 6 A (Figure 12) and sustains regulation with <±0.3% line/load regulation error per Table 1.

Use Scenario: Powering ARM-based CPU cores in ruggedized programmable logic controllers exposed to −40°C cold starts and 85°C ambient operation.

IC Role / Device Role / Timing Role: Robust controller with thermal shutdown (155°C), UVLO (2.65 V), and hiccup-mode fault recovery ensuring continuous operation under brownout or overload.

Use Value: Maintains stable 1.2 V output (via feedback divider) with <10 mV drift from −40°C to +85°C, verified in Figure 14 and Table 1.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS54620RGYT	Fixed 600 kHz frequency; no valley current mode; requires external current-sense resistor; 4.5–17 V input.	Lower switching frequency increases inductor size; lacks precharged-output startup capability.	Select when cost sensitivity outweighs size constraints and valley current sensing is not required.
ISL8113IRZ-T7A	1.2 MHz frequency; dual-phase capable; supports 4.5–60 V input; no integrated bootstrap diode.	Higher input voltage range suits industrial 24 V systems but demands external bootstrap diode and more complex layout.	Select for higher input voltage tolerance and phase-interleaving needs, accepting added BOM and layout complexity.

Compared with TPS54620RGYT and ISL8113IRZ-T7A, the ADP1874ARQZ-1.0-R7 offers superior light-load stability via valley current sensing, eliminates sense-resistor losses, and integrates bootstrap diode - making it optimal for compact, high-efficiency 1.0 MHz DC/DC designs in telecom and DSP applications.

Availability

ADP1874ARQZ-1.0-R7 is available at Aetrix Electronics and suitable for telecom server core rails, DSP processor power supplies, mid-range network switch ASICs, and industrial PLC CPU modules requiring stable component supply, long-term lifecycle support, and guaranteed RoHS compliance.

Supply support for ADP1874ARQZ-1.0-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 ADP1874/ADP1875 product line was designed specifically for high-efficiency, high-frequency synchronous buck conversion in telecom, networking, and computing infrastructure - emphasizing valley current mode control, minimal external components, and robust thermal and fault protection.

FAQ

What is the maximum input voltage rating for the ADP1874ARQZ-1.0-R7?

The ADP1874ARQZ-1.0-R7 has an absolute maximum VIN rating of +28 V, but its specified operational input voltage range is 3.25 V to 20 V for the -1.0 variant (per Table 1). Operation above 20 V risks violating functional specifications and may trigger undervoltage lockout recovery anomalies. Always observe the 20 V upper limit in normal use.

Does the ADP1874ARQZ-1.0-R7 require an external current-sense resistor?

No, the ADP1874ARQZ-1.0-R7 does not require an external current-sense resistor. It implements valley current sensing using the RES pin and an external resistor to GND, which programs the current-sense amplifier gain (2.7–26 V/V). This eliminates power loss and PCB area associated with shunt resistors while maintaining accurate overcurrent protection.

Can the ADP1874ARQZ-1.0-R7 start up into a precharged output voltage?

Yes, the ADP1874ARQZ-1.0-R7 supports startup into a precharged output. Its soft-start circuitry actively monitors the FB pin during power-up and disables gate drive until the output voltage falls below the target, preventing reverse current flow from the output capacitor into the controller. This behavior is confirmed in the General Description and Startup section of the datasheet.

What is the purpose of the TRACK pin on the ADP1874ARQZ-1.0-R7?

The TRACK pin on the ADP1874ARQZ-1.0-R7 enables voltage tracking for coordinated power-up sequencing. When a master rail voltage is applied to TRACK, the ADP1874ARQZ-1.0-R7 regulates its output to track that voltage with a fixed 63 mV offset relative to FB. This ensures controlled ramp rates and avoids bus contention in multi-rail systems such as FPGA or ASIC power domains.

Is the ADP1874ARQZ-1.0-R7 pin-compatible with other members of the ADP1874/ADP1875 family?

Yes, the ADP1874ARQZ-1.0-R7 is pin-compatible with all ADP1874/ADP1875 variants in the 16-lead QSOP package, including ADP1874ARQZ-0.3-R7 and ADP1874ARQZ-0.6-R7. The only differences are factory-trimmed switching frequency (1.0 MHz vs. 300 kHz or 600 kHz) and minor VREG operating range adjustments - all pin functions, layout, and external circuitry remain identical.

ADP1874ARQZ-1.0-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):: 3.25V ~ 20V

Frequency - Switching:: 1MHz

Duty Cycle (Max):: 45%

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-1.0-R7 FAQ

1.How can I place an order for ADP1874ARQZ-1.0-R7 through Aetrix?

Please submit a Request for Quotation (RFQ) for ADP1874ARQZ-1.0-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-1.0-R7 reliable?

The price and inventory of ADP1874ARQZ-1.0-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-1.0-R7 is usually 5 days.

3.What payment methods are accepted for ADP1874ARQZ-1.0-R7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP1874ARQZ-1.0-R7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ADP1874ARQZ-1.0-R7?

ADP1874ARQZ-1.0-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ADP1874ARQZ-1.0-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-1.0-R7?

For technical support, including ADP1874ARQZ-1.0-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP1874ARQZ-1.0-R7 requirements.

6.How does Aetrix verify that ADP1874ARQZ-1.0-R7 is sourced from the original manufacturer or authorized distributors?

All ADP1874ARQZ-1.0-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-1.0-R7 meets industry standards.

7.What is the process for return or replacement of ADP1874ARQZ-1.0-R7?

All ADP1874ARQZ-1.0-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP1874ARQZ-1.0-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-1.0-R7 part is unused and in its original packaging.

Return procedure for ADP1874ARQZ-1.0-R7:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…