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Analog Devices Inc. ADP1873ARMZ-0.6-R7
- Part No.:
- ADP1873ARMZ-0.6-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ADP1873ARMZ-0.6-R7.pdf
- Description:
- IC REG CTRLR BUCK 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,840
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Product details
Overview
ADP1873ARMZ-0.6-R7 from Analog Devices is a synchronous current-mode PWM buck controller with constant on-time architecture, designed for high-efficiency DC/DC conversion in space-constrained power supplies. It supports 600 kHz switching, delivers 0.6 V reference voltage with ±1.0% accuracy over −40°C to +125°C, operates from 2.75 V to 20 V input, and integrates bootstrap diode and valley current-sense for all-N-channel MOSFET stages.
For engineers reviewing the ADP1873ARMZ-0.6-R7 datasheet, ADP1873ARMZ-0.6-R7 pinout, ADP1873ARMZ-0.6-R7 application, or ADP1873ARMZ-0.6-R7 equivalent, key selection criteria include its PSM capability for light-load efficiency, resistor-programmable current-sense gain, precision enable threshold (235–330 mV), and thermal shutdown at 155°C - all critical for telecom, server, and DSP core supply designs.
Technical Context
The ADP1873ARMZ-0.6-R7 implements valley current-mode control with pseudo-fixed frequency operation, enabling stable regulation at low duty cycles down to 0.6 V output. Its constant on-time scheme provides fast transient response without external compensation, while integrated bootstrap diode and DRVL-based current-sense gain programming reduce BOM count.
It features power saving mode (PSM) for pulse-skipping at light loads, soft-start with 3.0 ms duration, and hiccup-mode short-circuit protection. The controller supports precharged output startup and reverse-current protection during soft start, with undervoltage lockout (UVLO) at 2.65 V and 190 mV hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 600 kHz - enables compact magnetics and high power density in mid-range server and networking supplies. |
| Reference Voltage | 0.6 V ±1.0% - ensures tight output regulation for low-voltage DSP/FPGA cores across temperature. |
| Input Voltage Range | 2.75 V to 20 V - supports wide-input industrial and telecom rails including 12 V and 16.5 V bus systems. |
| Power Saving Mode | Enabled - reduces quiescent current and improves light-load efficiency via pulse skipping (ADP1873-specific). |
| Shutdown Current | 140 µA - minimizes system standby power in always-on infrastructure equipment. |
| Operating Junction Temp | −40°C to +125°C - qualified for harsh environments in base station power and embedded servers. |
| Package | 10-lead MSOP - surface-mount footprint compatible with automated assembly and thermal management on 2-layer PCBs. |
Pinout & Package
ADP1873ARMZ-0.6-R7 is housed in a 10-lead MSOP package with exposed pad for thermal performance. Pin assignments are validated per Analog Devices Rev. B datasheet Figure 3 and Table 4.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | High-side power input | Connects to drain of upper N-MOSFET; accepts up to 20 V input rail. |
| COMP/EN | Error amplifier output / enable input | Logic-high enable threshold 235–330 mV; clamped at 0.47 V (low) and 2.55 V (high) for loop stability. |
| FB | Feedback node | Noninverting input tied to resistor divider; regulates output by comparing against 0.6 V internal reference. |
| GND | Analog ground reference | Separate analog ground plane required to minimize noise coupling into error amplifier and current sense path. |
| VDD | Bias supply input | 2.75–5.5 V bias rail; powers internal logic, gate drivers, and error amplifier; bypassed with 1 µF to PGND. |
| DRVL | Low-side gate driver output | Drives lower N-MOSFET; also sets current-sense gain via external resistor to PGND (e.g., 22 kΩ = 6 V/V). |
| PGND | Power ground return | Return path for low-side MOSFET source and DRVL driver; must be routed separately from analog GND. |
| DRVH | High-side gate driver output | Drives upper N-MOSFET gate; sourced from BST-SW bootstrap circuit; rise/fall times ≤25 ns/11 ns. |
| SW | Switch node | Connection point between upper/lower MOSFETs; ties to BST capacitor and inductor; handles high dv/dt switching. |
| BST | Bootstrap supply | Internal diode connects VDD to BST; requires external capacitor to SW for high-side gate drive voltage boost. |
Key Features
| Feature | Design Value |
|---|---|
| Power Saving Mode (PSM) | Enables pulse-skipping at light loads to maintain >85% efficiency down to 10 mA, critical for idle-state power savings in servers. |
| Integrated Bootstrap Diode | Eliminates need for external Schottky diode in most designs, reducing component count and layout complexity for high-side drive. |
| Resistor-Programmable Current Sense Gain | Four gain options (3× to 24×) set via DRVL-to-PGND resistor - allows optimization of current limit accuracy and noise immunity. |
| Valley Current-Mode Control | Provides inherent cycle-by-cycle current limiting and stable operation at very low duty cycles (e.g., 0.6 V out from 12 V in). |
| Precharged Output Startup | Allows safe startup into existing output voltage without reverse current flow - essential for hot-swap and redundant power systems. |
Applications
| Telecom Power Supply | Server Core Voltage Regulator |
|---|---|
Use Scenario: Point-of-load (POL) regulation for 48 V intermediate bus in optical line terminals and baseband units. IC Role / Device Role / Timing Role: Synchronous buck controller managing 1.8 V/5 A DSP core supply with fast load transient response. Use Value: Constant on-time architecture achieves <10 µs recovery from 50% load step, minimizing output capacitance and board area. |
Use Scenario: Primary VRM for multi-core CPU or FPGA in mid-tier rack servers with 12 V input bus. IC Role / Device Role / Timing Role: High-efficiency 600 kHz buck controller delivering 0.8 V @ 20 A with PSM for dynamic power states. Use Value: PSM extends efficiency above 85% at 100 mA load, reducing idle power by >300 mW versus forced-PWM alternatives. |
| Set-Top Box SoC Supply | DSP Core Power |
Use Scenario: Compact 5 V-to-1.2 V conversion for ARM-based media processors in consumer STBs. IC Role / Device Role / Timing Role: Low-noise, valley current-mode controller with soft-start and UVLO for reliable cold-boot behavior. Use Value: 3.0 ms internal soft-start limits inrush current to <1.5 A, preventing brownout on shared 5 V rail. |
Use Scenario: Dedicated 3.3 V-to-1.0 V regulator for TI C6000 or Analog Devices SHARC DSPs in test equipment. IC Role / Device Role / Timing Role: Precision 0.6 V reference with ±1.0% tolerance ensures ADC reference stability and signal integrity. Use Value: FB input leakage <50 nA prevents resistive divider error, maintaining <±2 mV output drift over temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADP1872ARMZ-0.6-R7 | No Power Saving Mode (PSM); fixed PWM operation only; identical pinout, frequency, and reference specs. | Suitable where light-load efficiency is secondary to deterministic switching and EMI control. | Select ADP1872ARMZ-0.6-R7 when PSM-induced frequency variation is unacceptable in noise-sensitive RF subsystems. |
| TPS54620RGYR | Fixed 600 kHz frequency, no PSM, but includes integrated high/low-side FETs (4.5–17 V input, 0.8 V ref). | Replaces discrete MOSFET stage; higher integration but lower max input voltage and no DRVL gain programming. | Choose TPS54620RGYR for simplified design with lower external part count where 17 V max input suffices and gain flexibility is not required. |
Compared with ADP1873ARMZ-0.6-R7, ADP1872ARMZ-0.6-R7 trades light-load efficiency for predictable frequency behavior, while TPS54620RGYR sacrifices programmability and input voltage range for monolithic integration - making ADP1873ARMZ-0.6-R7 optimal for high-flexibility, wide-input POL designs requiring PSM.
Availability
ADP1873ARMZ-0.6-R7 is available at Aetrix Electronics and suitable for telecom infrastructure, server power management, and DSP core supply applications requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for ADP1873ARMZ-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The ADP187x family was engineered for high-efficiency, high-transient-response synchronous buck controllers targeting telecom, server, and DSP power applications - emphasizing flexibility, thermal robustness, and minimal external components.
FAQ
What is the switching frequency of the ADP1873ARMZ-0.6-R7?
The ADP1873ARMZ-0.6-R7 is factory-configured for 600 kHz nominal switching frequency. This value is fixed per the "-0.6" suffix and remains stable across load, input voltage, and temperature - with typical variation within ±10% under full operating conditions per datasheet Figure 23.
Does the ADP1873ARMZ-0.6-R7 support power saving mode (PSM)?
Yes, the ADP1873ARMZ-0.6-R7 includes Power Saving Mode (PSM), which enables pulse-skipping operation at light loads to improve efficiency. This feature is exclusive to the ADP1873 variant and is disabled in the ADP1872 - confirmed in the General Description section of the Rev. B datasheet.
What is the reference voltage accuracy of the ADP1873ARMZ-0.6-R7 over temperature?
The ADP1873ARMZ-0.6-R7 features a 0.6 V internal reference with ±1.0% accuracy over the full −40°C to +125°C junction temperature range, as specified in Table 1 (VFB min/max values). This tolerance ensures consistent output regulation for low-voltage digital loads without external trimming.
Can the ADP1873ARMZ-0.6-R7 start into a precharged output?
Yes, the ADP1873ARMZ-0.6-R7 supports startup into a precharged output voltage. Its internal circuitry prevents reverse current flow during soft start, as stated in the General Description and verified in the Startup section - a key requirement for hot-swap and redundant power architectures.
What package type and pin count does the ADP1873ARMZ-0.6-R7 use?
The ADP1873ARMZ-0.6-R7 uses a 10-lead MSOP package with exposed pad, as documented in the Outline Dimensions section and Pin Configuration diagram (Figure 3) of the Rev. B datasheet. This package supports thermal dissipation up to 171.7°C/W on 4-layer boards.
ADP1873ARMZ-0.6-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm 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):
- 2.75V ~ 20V
- Frequency - Switching:
- 600kHz
- Duty Cycle (Max):
- 65%
- Synchronous Rectifier:
- Yes
- Clock Sync:
- No
- Serial Interfaces:
- -
- Control Features:
- Enable
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
ADP1873ARMZ-0.6-R7 FAQ
1.How can I place an order for ADP1873ARMZ-0.6-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP1873ARMZ-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 ADP1873ARMZ-0.6-R7 reliable?
The price and inventory of ADP1873ARMZ-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 ADP1873ARMZ-0.6-R7 is usually 5 days.
3.What payment methods are accepted for ADP1873ARMZ-0.6-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP1873ARMZ-0.6-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP1873ARMZ-0.6-R7?
ADP1873ARMZ-0.6-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP1873ARMZ-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 ADP1873ARMZ-0.6-R7?
For technical support, including ADP1873ARMZ-0.6-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP1873ARMZ-0.6-R7 requirements.
6.How does Aetrix verify that ADP1873ARMZ-0.6-R7 is sourced from the original manufacturer or authorized distributors?
All ADP1873ARMZ-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 ADP1873ARMZ-0.6-R7 meets industry standards.
7.What is the process for return or replacement of ADP1873ARMZ-0.6-R7?
All ADP1873ARMZ-0.6-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP1873ARMZ-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 ADP1873ARMZ-0.6-R7 part is unused and in its original packaging.
Return procedure for ADP1873ARMZ-0.6-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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