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Analog Devices Inc. ADP1875ARQZ-0.6-R7
- Part No.:
- ADP1875ARQZ-0.6-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
ADP1875ARQZ-0.6-R7.pdf
- Description:
- IC REG CTRLR BUCK 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,335
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Product details
Overview
ADP1875ARQZ-0.6-R7 from Analog Devices is a synchronous buck controller with valley current-mode control and constant on-time architecture, designed for high-efficiency DC/DC conversion in DSP core power supplies. 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 integrates bootstrap diode and power-saving mode (PSM) for light-load efficiency.
For engineers reviewing the ADP1875ARQZ-0.6-R7 datasheet, ADP1875ARQZ-0.6-R7 pinout, ADP1875ARQZ-0.6-R7 application, or ADP1875ARQZ-0.6-R7 equivalent, key selection considerations include its PSM capability, resistor-programmable current limit, valley current sensing without external sense resistor, soft-start programmability, and thermal shutdown protection across −40°C to +125°C junction temperature.
Technical Context
The ADP1875ARQZ-0.6-R7 implements a pseudo-fixed-frequency valley current-mode control scheme with constant on-time modulation, enabling stable regulation at low duty cycles down to 0.6 V output. Its architecture eliminates the need for an external current-sense resistor by using low-side MOSFET RDS(on) sensing via the DRVL pin.
It features integrated 5 V internal LDO bias regulator (VREG), standalone precision enable input with 630 mV threshold, and power-good monitoring with internal pull-up. The device supports precharged output startup and includes hiccup-mode short-circuit protection and thermal overload shutdown at 155°C.
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 regulators. |
| Output Voltage Reference | 0.6 V ±1.0% - enables precise low-voltage core regulation for modern DSPs and FPGAs. |
| Switching Frequency | 600 kHz - balances efficiency, size, and EMI for mid-power applications with compact magnetics. |
| Current Limit Method | Resistor-programmable gain (via RES pin) - allows flexible overcurrent protection tuning without changing layout. |
| Power Saving Mode | Enabled (ADP1875 only) - pulse-skipping at light loads improves system efficiency without compromising regulation. |
| Junction Temperature Range | −40°C to +125°C - qualified for harsh environments including server VRMs and networking equipment. |
| Package | 16-lead QSOP - surface-mount package with 104°C/W θJA on 4-layer board for thermal management. |
Pinout & Package
ADP1875ARQZ-0.6-R7 is housed in a 16-lead QSOP package with exposed pad for thermal enhancement. Pin assignments follow standard synchronous buck controller topology: high-side gate drive (DRVH), low-side gate drive (DRVL), switch node (SW), bootstrap (BST), feedback (FB), soft-start (SS), and precision enable (EN).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | High-side input supply | Connects to drain of upper N-MOSFET; accepts full 2.95–20 V range. |
| COMP | Error amplifier output | Interface for Type II/III compensation network to stabilize loop response. |
| EN | Enable control input | Logic-high threshold 630 mV ±31 mV; enables precise sequencing with external voltage rails. |
| FB | Feedback sense node | Monitors output via resistor divider; regulates to 0.6 V reference with ±1.0% accuracy. |
| BST | Bootstrap capacitor connection | Drives high-side N-MOSFET gate above VIN; internal Schottky diode reduces external part count. |
| SW | Switch node | Connects to source of upper MOSFET and drain of lower MOSFET; critical for layout EMI reduction. |
| DRVH | High-side gate driver output | Drives upper N-MOSFET gate with 2.25 Ω source / 0.7 Ω sink resistance for fast transitions. |
| DRVL | Low-side gate driver output | Serves dual role: drives lower N-MOSFET and sets current-sense gain via RES resistor. |
| RES | Current-sense gain programming | External resistor to GND sets gain (e.g., 22 kΩ = 6 V/V) for accurate valley current limiting. |
| PGOOD | Open-drain power-good signal | Asserts when FB is within 542–568 mV; used for system power sequencing and fault reporting. |
| VREG | Internal 5 V LDO output | Bias supply for internal circuitry and gate drivers; requires 1 µF bypass to PGND. |
| SS | Soft-start timing input | Capacitor to GND sets ramp time (10 nF = 1 ms); prevents inrush and enables reverse-current protection. |
| TRACK | Output voltage tracking input | Supports multi-rail sequencing by referencing another supply; offset = VFB − VTRACK = 63 mV. |
| GND | Analog ground reference | Separate from PGND; connects sensitive analog blocks (error amp, reference) to minimize noise coupling. |
| PGND | Power ground return | Return path for low-side driver and MOSFET source; must be routed separately from AGND for stability. |
Key Features
| Feature | Design Value |
|---|---|
| No current-sense resistor required | Valley current sensing via DRVL pin uses MOSFET RDS(on), reducing BOM cost and PCB area. |
| Integrated bootstrap diode | Eliminates external Schottky diode, simplifying layout and improving reliability in high-density designs. |
| Power saving mode (PSM) | Pulse-skipping at light loads maintains regulation while boosting efficiency-unique to ADP1875 variant. |
| Starts into precharged output | Enables safe hot-plug operation in modular systems without output voltage overshoot or reverse current. |
| Standalone precision enable input | 630 mV threshold with 31 mV hysteresis allows direct connection to sequenced supply rails without level-shifting. |
| Thermal and short-circuit protection | Hiccup-mode current limit (6 ms timeout) and 155°C thermal shutdown prevent damage during fault conditions. |
Applications
| Telecom Power Modules | DSP Core Supplies |
|---|---|
Use Scenario: Regulating 0.8 V/12 A core voltage for high-performance digital signal processors in baseband units. IC Role / Device Role / Timing Role: Synchronous buck controller managing high-current, low-voltage conversion with valley current-mode stability. Use Value: Achieves >90% efficiency at 12 A load with 600 kHz switching, minimizing heatsink requirements and board space. | Use Scenario: Providing tightly regulated 1.8 V I/O supply for FPGA transceivers in 10G Ethernet line cards. IC Role / Device Role / Timing Role: Primary DC/DC controller delivering fast transient response and ±1.0% output accuracy. Use Value: Soft-start programmability (via SS pin) prevents inrush during hot-swap events, ensuring system-level reliability. |
| Mid-Range Server VRMs | Set-Top Box SoC Power |
Use Scenario: Generating 0.6 V CPU core rail in entry-level servers where thermal headroom is constrained. IC Role / Device Role / Timing Role: High-efficiency synchronous controller with PSM extending battery-free runtime during idle states. Use Value: Power saving mode improves light-load efficiency by up to 15% versus forced PWM, reducing standby power loss. | Use Scenario: Supplying 5 V/3 A auxiliary rail for video decoding SoCs in consumer set-top boxes. IC Role / Device Role / Timing Role: Buck controller supporting wide 2.95–20 V input range to accommodate varying AC/DC adapter outputs. Use Value: Integrated 5 V LDO (VREG) powers gate drivers and internal logic, eliminating need for external bias supply. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADP1874ARQZ-0.6-R7 | Lacks power saving mode (PSM); fixed PWM operation only. | Preferred where consistent switching frequency is required for EMI filtering, not light-load efficiency. | Select ADP1874ARQZ-0.6-R7 if PSM is unnecessary and deterministic frequency behavior is prioritized. |
| TPS54620RGYT | 600 kHz fixed-frequency current-mode controller with integrated high-/low-side MOSFETs (4.5–17 V input). | Targeted at lower-current applications (<6 A); monolithic design reduces external component count but limits scalability. | Choose TPS54620RGYT for space-constrained designs needing integrated FETs, but verify thermal performance at full load. |
Compared with ADP1874ARQZ-0.6-R7, the ADP1875ARQZ-0.6-R7 adds pulse-skipping for improved light-load efficiency; versus TPS54620RGYT, it offers higher current capability via external FETs and wider input range, but requires more external components.
Availability
ADP1875ARQZ-0.6-R7 is available at Aetrix Electronics and suitable for telecom power modules, DSP core supplies, and mid-range server VRMs requiring stable component supply, long-term lifecycle support, and guaranteed parametric performance across −40°C to +125°C.
Supply support for ADP1875ARQZ-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 since 1965.
The ADP1875 belongs to Analog Devices' high-efficiency synchronous buck controller product line, engineered for demanding point-of-load applications where precision regulation, thermal robustness, and light-load efficiency are critical.
FAQ
What is the switching frequency of the ADP1875ARQZ-0.6-R7?
The ADP1875ARQZ-0.6-R7 is factory-configured for 600 kHz nominal switching frequency. This value is fixed per variant designation ("-0.6") and remains stable across load and input voltage variations, with typical deviation <±10% under full operating conditions.
Does the ADP1875ARQZ-0.6-R7 require an external current-sense resistor?
No, the ADP1875ARQZ-0.6-R7 does not require an external current-sense resistor. It implements valley current sensing through the DRVL pin and RES pin configuration, using the RDS(on) of the low-side N-MOSFET for current measurement and limiting.
What is the purpose of the TRACK pin on the ADP1875ARQZ-0.6-R7?
The TRACK pin on the ADP1875ARQZ-0.6-R7 enables output voltage tracking for multi-rail power sequencing. When a reference voltage is applied, the controller regulates its output to maintain a fixed 63 mV offset below that reference, supporting coordinated startup/shutdown of dependent supplies.
How does the power saving mode (PSM) function in the ADP1875ARQZ-0.6-R7?
In the ADP1875ARQZ-0.6-R7, power saving mode (PSM) activates automatically at light loads, causing the controller to skip switching cycles while maintaining output regulation. This reduces switching losses and improves system efficiency without requiring external control signals.
What is the minimum output voltage supported by the ADP1875ARQZ-0.6-R7?
The ADP1875ARQZ-0.6-R7 supports a minimum output voltage of 0.6 V, set by its internal reference voltage. This value is guaranteed with ±1.0% accuracy over temperature (−40°C to +125°C) and line/load conditions, making it suitable for advanced processor core rails.
ADP1875ARQZ-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
ADP1875ARQZ-0.6-R7 FAQ
1.How can I place an order for ADP1875ARQZ-0.6-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP1875ARQZ-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 ADP1875ARQZ-0.6-R7 reliable?
The price and inventory of ADP1875ARQZ-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 ADP1875ARQZ-0.6-R7 is usually 5 days.
3.What payment methods are accepted for ADP1875ARQZ-0.6-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP1875ARQZ-0.6-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP1875ARQZ-0.6-R7?
ADP1875ARQZ-0.6-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP1875ARQZ-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 ADP1875ARQZ-0.6-R7?
For technical support, including ADP1875ARQZ-0.6-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP1875ARQZ-0.6-R7 requirements.
6.How does Aetrix verify that ADP1875ARQZ-0.6-R7 is sourced from the original manufacturer or authorized distributors?
All ADP1875ARQZ-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 ADP1875ARQZ-0.6-R7 meets industry standards.
7.What is the process for return or replacement of ADP1875ARQZ-0.6-R7?
All ADP1875ARQZ-0.6-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP1875ARQZ-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 ADP1875ARQZ-0.6-R7 part is unused and in its original packaging.
Return procedure for ADP1875ARQZ-0.6-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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