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Analog Devices Inc. ADP1874ARQZ-0.6-R7
- Part No.:
- ADP1874ARQZ-0.6-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
ADP1874ARQZ-0.6-R7.pdf
- Description:
- IC REG CTRLR BUCK 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
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Product details
Overview
ADP1874ARQZ-0.6-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 supports 2.95 V to 20 V input, delivers 0.6 V output with ±1.0% reference accuracy, operates at 600 kHz switching frequency, and drives all-N-channel MOSFET power stages in telecom and server core power supplies.
For engineers reviewing the ADP1874ARQZ-0.6-R7 datasheet, ADP1874ARQZ-0.6-R7 pinout, ADP1874ARQZ-0.6-R7 application, or ADP1874ARQZ-0.6-R7 equivalent, key selection criteria include its 600 kHz fixed-frequency operation, integrated bootstrap diode, valley-current sensing without external sense resistor, precision 0.6 V feedback reference, and thermal shutdown protection at 155°C.
Technical Context
The ADP1874ARQZ-0.6-R7 uses a pseudo-fixed-frequency constant on-time architecture combined with valley current-mode control to achieve fast transient response and stable low-duty-cycle regulation down to 0.6 V. Its internal 5 V LDO (VREG) biases gate drivers and analog circuitry, while the RES pin enables programmable current-sense gain via external resistor selection.
It integrates a bootstrap diode between VREG and BST, eliminates need for external high-side sense resistor, and supports precharged output startup. The device features standalone EN input with 630 mV threshold, PGOOD open-drain output with internal pull-up, and soft-start programmability via SS-to-GND capacitor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.95 V to 20 V - supports wide-input industrial and telecom power rails without external bias supply. |
| Output Reference Voltage | 0.6 V ±1.0% - enables precise low-voltage core regulation for modern processors and FPGAs. |
| Switching Frequency | 600 kHz - balances efficiency, size, and EMI for mid-power applications like DSP cores and set-top boxes. |
| Internal Regulator Output | 5 V ±0.5 V - powers gate drivers and internal circuitry; eliminates need for external bias rail. |
| Feedback Accuracy (−40°C to +125°C) | 594.2 mV to 605.8 mV - ensures stable output under full automotive-grade junction temperature range. |
| Thermal Shutdown Threshold | 155°C - provides robust overtemperature protection with 15°C hysteresis for reliable system recovery. |
| Soft Start Rate | 10 nF/ms - allows precise control of in-rush current via external SS capacitor, preventing input rail collapse. |
Pinout & Package
ADP1874ARQZ-0.6-R7 is housed in a 16-lead QSOP package with exposed pad for thermal performance. Pin assignments are validated per Analog Devices Rev. A datasheet Figure 3 and Table 4.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | High-side input supply | Connects to drain of upper N-MOSFET; accepts 2.95–20 V input rail. |
| COMP | Error amplifier output | Interface for Type II/III compensation network to stabilize loop response. |
| EN | Enable control input | Logic-high threshold 630 mV; enables device when tied to VREG (5 V). |
| FB | Feedback node | Non-inverting input of error amp; regulates output via resistive divider to 0.6 V reference. |
| BST | Bootstrap supply | Drives high-side gate via internal Schottky diode; requires BST-to-SW capacitor. |
| SW | Switch node | Connection point between high- and low-side MOSFETs; critical for layout EMI control. |
| DRVH | High-side gate driver | Outputs 5 V logic-level drive with 2.25 Ω source resistance for fast N-MOSFET turn-on. |
| DRVL | Low-side gate driver | Drives lower N-MOSFET with 1.6 Ω source resistance; also sets current-sense gain via RES pin. |
| PGND | Power ground | Return path for low-side driver and MOSFET source; must be separated from analog GND. |
| GND | Analog ground | Reference for FB, COMP, RES, SS; requires dedicated low-noise ground plane. |
| RES | Current-sense gain select | Resistor to PGND sets gain (e.g., 22 kΩ = 6 V/V); enables accurate current limiting without sense resistor. |
| PGOOD | Power-good indicator | Open-drain output active-low when FB deviates >5.3% from 0.6 V or during thermal shutdown. |
| VREG | Internal LDO output | 5 V regulated supply for internal logic and gate drivers; bypassed with 1 µF to PGND. |
| 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 in-rush and reverse current on precharged outputs. |
| TRACK | Voltage tracking input | Enables sequencing with master supply; offset 63 mV below FB for accurate tracking. |
Key Features
| Feature | Design Value |
|---|---|
| No external current-sense resistor | Valley current sensing via DRVL pin eliminates power loss and board space for shunt resistor. |
| Integrated bootstrap diode | Reduces BOM count and improves reliability by replacing external Schottky diode in high-side drive path. |
| Starts into precharged output | Prevents reverse current flow during hot-plug or partial-power-up scenarios without external circuitry. |
| Resistor-programmable current limit | External RES-to-PGND resistor (e.g., 22 kΩ) sets gain for accurate overcurrent protection across load conditions. |
| Standalone precision enable input | EN threshold tightly specified (570–680 mV) with 31 mV hysteresis enables clean, noise-immune power sequencing. |
Applications
| Telecom Power Supply | Server Core Voltage Regulator |
|---|---|
Use Scenario: Point-of-load regulation for FPGA or ASIC in 48 V intermediate bus telecom systems. IC Role / Device Role / Timing Role: Synchronous buck controller managing 12 V input to 0.8–1.8 V core output with 600 kHz switching. Use Value: Achieves >90% efficiency at 10 A load (VIN = 13 V, VOUT = 1.8 V), minimizing thermal stress in dense line cards. | Use Scenario: Primary VRM for CPU/GPU cores in mid-range servers requiring tight voltage tolerance. IC Role / Device Role / Timing Role: Valley-current-mode controller delivering 0.6 V ±1% output with fast transient response to dynamic load steps. Use Value: Maintains ±1.5 mV output deviation across −40°C to +125°C junction temperature per Figure 14 and Figure 17. |
| Set-Top Box DC/DC Stage | DSP Processor Power |
Use Scenario: Compact, cost-sensitive 5 V to 3.3 V or 1.2 V conversion in consumer STB mainboard. IC Role / Device Role / Timing Role: Fixed-frequency buck controller with integrated gate drivers and LDO, reducing external components. Use Value: Enables single-chip solution with no external sense resistor or bootstrap diode-reducing BOM by ≥3 parts. | Use Scenario: Low-noise, high-accuracy power for TI C6000 or Analog Devices SHARC DSP cores. IC Role / Device Role / Timing Role: Precision 0.6 V reference buck controller supporting soft-start and voltage tracking for multi-rail sequencing. Use Value: TRACK pin enables synchronized ramp-up with I/O supply; ±1.0% reference ensures ADC/DAC reference stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADP1875ARQZ-0.6-R7 | Includes Power Saving Mode (PSM) for light-load pulse-skipping; ADP1874ARQZ-0.6-R7 lacks PSM and operates in forced PWM only. | ADP1875ARQZ-0.6-R7 preferred for battery-powered or standby-sensitive systems; ADP1874ARQZ-0.6-R7 suits continuous high-load applications where PSM adds complexity. | Select ADP1874ARQZ-0.6-R7 when deterministic PWM timing, absence of low-load frequency variation, or simplified control loop design is required. |
| TPS54620RGYT | TI part uses current-mode control with integrated MOSFETs (buck converter IC), whereas ADP1874ARQZ-0.6-R7 is a controller only requiring external FETs. | TPS54620RGYT targets lower-power, space-constrained designs (<6 A); ADP1874ARQZ-0.6-R7 scales to higher currents using discrete N-MOSFETs. | Choose ADP1874ARQZ-0.6-R7 for >10 A applications, custom FET selection, or thermal management flexibility unavailable in integrated solutions. |
Compared with ADP1875ARQZ-0.6-R7, the ADP1874ARQZ-0.6-R7 offers deterministic 600 kHz operation without light-load frequency modulation, simplifying EMI filtering and loop compensation. Against TPS54620RGYT, it provides higher current scalability and discrete FET optimization at the cost of additional external components.
Availability
ADP1874ARQZ-0.6-R7 is available at Aetrix Electronics and suitable for telecom infrastructure, server power delivery, and embedded DSP applications requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for ADP1874ARQZ-0.6-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 delivers high-efficiency, high-current synchronous buck controllers optimized for core voltage regulation in computing, networking, and infrastructure equipment where precision, thermal robustness, and layout simplicity are critical.
FAQ
What is the switching frequency of the ADP1874ARQZ-0.6-R7?
The ADP1874ARQZ-0.6-R7 operates at a nominal 600 kHz switching frequency, as indicated by the "-0.6" suffix in its part number. This frequency is pseudo-fixed and remains stable across load and line variations, with typical deviation less than ±10% under full operating conditions per datasheet Figures 24 and 29.
Does the ADP1874ARQZ-0.6-R7 require an external current-sense resistor?
No, the ADP1874ARQZ-0.6-R7 does not require an external current-sense resistor. It implements valley current sensing through the DRVL pin and uses an external resistor on the RES pin to program current-limit gain-eliminating power loss and PCB area associated with shunt resistors.
What is the purpose of the TRACK pin on the ADP1874ARQZ-0.6-R7?
The TRACK pin on the ADP1874ARQZ-0.6-R7 enables voltage tracking for power supply sequencing. When used, it forces the FB node to follow an external reference voltage with a fixed 63 mV offset, allowing coordinated ramp-up with master supplies-critical for multi-rail processors and FPGAs.
Can the ADP1874ARQZ-0.6-R7 start up into a precharged output?
Yes, the ADP1874ARQZ-0.6-R7 supports startup into a precharged output. Its control architecture prevents reverse current flow during hot-plug events by disabling high-side drive until the FB voltage rises above the regulation threshold, eliminating need for external reverse-blocking circuitry.
What package type is used for the ADP1874ARQZ-0.6-R7?
The ADP1874ARQZ-0.6-R7 is packaged in a 16-lead QSOP (Quad Small Outline Package) with exposed pad, offering thermal performance suitable for high-current applications. Its θJA is specified at 104°C/W on a 4-layer board per datasheet Table 3.
ADP1874ARQZ-0.6-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:
- 600kHz
- Duty Cycle (Max):
- 65%
- 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-0.6-R7 FAQ
1.How can I place an order for ADP1874ARQZ-0.6-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP1874ARQZ-0.6-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-0.6-R7 reliable?
The price and inventory of ADP1874ARQZ-0.6-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-0.6-R7 is usually 5 days.
3.What payment methods are accepted for ADP1874ARQZ-0.6-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP1874ARQZ-0.6-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP1874ARQZ-0.6-R7?
ADP1874ARQZ-0.6-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP1874ARQZ-0.6-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-0.6-R7?
For technical support, including ADP1874ARQZ-0.6-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP1874ARQZ-0.6-R7 requirements.
6.How does Aetrix verify that ADP1874ARQZ-0.6-R7 is sourced from the original manufacturer or authorized distributors?
All ADP1874ARQZ-0.6-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-0.6-R7 meets industry standards.
7.What is the process for return or replacement of ADP1874ARQZ-0.6-R7?
All ADP1874ARQZ-0.6-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP1874ARQZ-0.6-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-0.6-R7 part is unused and in its original packaging.
Return procedure for ADP1874ARQZ-0.6-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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