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Analog Devices Inc. ADP1873ARMZ-0.3-R7
- Part No.:
- ADP1873ARMZ-0.3-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ADP1873ARMZ-0.3-R7.pdf
- Description:
- IC REG CTRLR BUCK 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
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Product details
Overview
ADP1873ARMZ-0.3-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 N-channel MOSFET power stages. It operates from 2.75 V to 20 V input, delivers 0.6 V reference accuracy (±1.0%), supports 300 kHz switching, and integrates bootstrap diode and PSM for light-load efficiency-used in DSP core supplies and telecom power rails.
For engineers reviewing the ADP1873ARMZ-0.3-R7 datasheet, ADP1873ARMZ-0.3-R7 pinout, ADP1873ARMZ-0.3-R7 application, or ADP1873ARMZ-0.3-R7 equivalent, key selection criteria include its valley current-mode control, resistor-programmable current-sense gain, PSM capability, thermal shutdown at 155°C, and MSOP-10 package compatibility with precharged load startup.
Technical Context
The ADP1873ARMZ-0.3-R7 implements a pseudo-fixed frequency, constant on-time control scheme with valley current sensing to maintain stability at low duty cycles and enable regulation down to 0.6 V output. Its architecture eliminates the need for an external current-sense resistor and supports all-N-channel synchronous rectification.
It features integrated high- and low-side gate drivers (DRVH/DRVL), internal bootstrap diode between VDD and BST, precision enable threshold (235–330 mV), and soft-start period of 3.0 ms. The device uses valley current-limit setting via DRVL-to-PGND resistor and enters hiccup mode during short-circuit events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 300 kHz - fixed nominal frequency enabling compact magnetics and predictable EMI profile |
| Input Voltage Range | 2.75 V to 20 V - supports wide-range industrial and telecom input rails without external regulators |
| Reference Voltage | 0.6 V ±1.0% - enables precise low-voltage regulation for modern DSP/FPGA cores |
| Power Saving Mode | Enabled - pulse-skipping operation improves light-load efficiency without compromising regulation |
| Shutdown Current | 140 µA - minimizes system standby power in battery-backed or always-on applications |
| Operating Junction Temp | −40°C to +125°C - qualified for harsh industrial and telecom environments |
| Package | 10-lead MSOP - surface-mount footprint with thermal pad for enhanced power dissipation |
Pinout & Package
ADP1873ARMZ-0.3-R7 is housed in a 10-lead MSOP package with exposed thermal pad (pin 0), optimized for thermal performance in high-current buck applications. 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 |
| COMP/EN | Error amplifier output / enable input | Active-low enable (235–330 mV threshold); also provides loop compensation node |
| FB | Feedback input | Senses output voltage divider; regulates to 0.6 V reference with ±1.0% accuracy |
| GND | Analog ground reference | Separate analog return for error amp and sensing; must be isolated from PGND |
| VDD | Bias supply input | 2.75–5.5 V bias rail; powers internal logic and gate drivers |
| DRVL | Low-side gate driver output | Drives lower N-MOSFET; also sets current-sense gain via external resistor to PGND |
| PGND | Power ground | Return path for low-side FET and gate driver; connects to source of lower MOSFET |
| DRVH | High-side gate driver output | Drives upper N-MOSFET; requires bootstrap capacitor between BST and SW |
| SW | Switch node | Connection point between upper and lower MOSFETs; ties to BST capacitor and inductor |
| BST | Bootstrap supply | Internal diode-connected to VDD; charges BST–SW capacitor for high-side drive |
Key Features
| Feature | Design Value |
|---|---|
| No current-sense resistor required | Valley current sensing via DRVL pin eliminates external sense resistor, reducing BOM cost and PCB area |
| Integrated bootstrap diode | Reduces external component count by integrating VDD-to-BST diode; simplifies high-side gate drive design |
| Starts into precharged load | Soft-start circuit prevents reverse current flow during startup with charged output capacitors |
| Resistor-programmable current-sense gain | Gain set by DRVL-to-PGND resistor (e.g., 47 kΩ → 3 V/V) enables flexible overcurrent protection tuning |
| Thermal overload & short-circuit protection | 155°C thermal shutdown with 15°C hysteresis and hiccup-mode current limiting for robust fault recovery |
Applications
| Telecom Power Supply | DSP Core Voltage Regulator |
|---|---|
|
Use Scenario: Point-of-load regulation for baseband processors in 4G/LTE remote radio units requiring stable 1.8 V at up to 5 A. IC Role / Device Role / Timing Role: Synchronous buck controller managing high-efficiency step-down from 12 V or 48 V intermediate bus to DSP core voltage. Use Value: 300 kHz switching enables small 1.2 µH inductors; PSM maintains >85% efficiency at 100 mA load, extending system uptime. |
Use Scenario: Low-noise, tightly regulated power for TI C6000 or Analog Devices SHARC DSPs in real-time audio processing systems. IC Role / Device Role / Timing Role: Primary voltage controller delivering 0.8 V or 1.2 V with ±1.0% reference accuracy and fast transient response. Use Value: Valley current-mode control ensures stable regulation at <10% duty cycle; soft-start prevents in-rush damage to sensitive DSP I/O. |
| Mid-Range Server VRM | Set-Top Box SoC Supply |
|
Use Scenario: Secondary regulation stage feeding ASICs or memory interfaces in edge-server motherboards with 5.5–16.5 V input rails. IC Role / Device Role / Timing Role: High-current synchronous buck controller driving dual N-MOSFETs (e.g., Infineon BSC042N03MS G) in continuous conduction mode. Use Value: Integrated 22 Ω bootstrap rectifier reduces gate drive losses; 140 µA shutdown current supports deep-sleep power states. |
Use Scenario: Compact, cost-sensitive 3.3 V or 5 V supply for Broadcom or MediaTek SoCs in consumer IPTV hardware. IC Role / Device Role / Timing Role: Fixed-frequency buck controller replacing discrete solutions to meet CE/UL safety and EMI requirements. Use Value: MSOP-10 package fits tight board space; 300 kHz operation avoids AM radio band; PSM extends standby battery life in remote-controlled devices. |
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-0.3-R7 | Lacks power saving mode (PSM); fixed PWM operation only | Preferred where consistent switching frequency is critical for EMI filtering, not light-load efficiency | Select ADP1872ARMZ-0.3-R7 when PSM-induced frequency variation is unacceptable in noise-sensitive systems |
| TPS54332DR | Fixed 300 kHz frequency, integrated high-side MOSFET, no PSM, 0.8 V reference | Better suited for lower-current (<3 A), space-constrained designs due to integrated FET | Choose TPS54332DR if board area is constrained and external MOSFETs are undesirable, accepting higher conduction loss |
Compared with ADP1872ARMZ-0.3-R7, the ADP1873ARMZ-0.3-R7 adds PSM for improved light-load efficiency, while TPS54332DR trades external FET flexibility for integration-making ADP1873ARMZ-0.3-R7 optimal for high-current, thermally demanding, and dynamically loaded telecom/DSP applications.
Availability
ADP1873ARMZ-0.3-R7 is available at Aetrix Electronics and suitable for telecom infrastructure, DSP power management, and mid-tier server applications requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for ADP1873ARMZ-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 since 1965.
The ADP1873ARMZ-0.3-R7 belongs to Analog Devices' high-efficiency synchronous buck controller product line, engineered for precision, low-noise, and thermally robust DC/DC conversion in demanding power management systems.
FAQ
What is the switching frequency of the ADP1873ARMZ-0.3-R7?
The ADP1873ARMZ-0.3-R7 is factory-configured for a nominal 300 kHz switching frequency. This value is fixed per the "-0.3" suffix and remains stable across input voltage and load conditions within ±10% tolerance, as verified in Figures 22–27 of the Rev. B datasheet.
Does the ADP1873ARMZ-0.3-R7 support precharged output capacitors?
Yes, the ADP1873ARMZ-0.3-R7 supports startup into a precharged load. Its internal soft-start circuit prevents reverse current flow during initial power-up, protecting both the IC and downstream components-a feature confirmed in the General Description section and Figure 57 timing diagram.
How does the power saving mode (PSM) operate in the ADP1873ARMZ-0.3-R7?
The ADP1873ARMZ-0.3-R7 enters PSM under light-load conditions by skipping pulses while maintaining output regulation. This reduces switching losses and improves efficiency below ~200 mA, as demonstrated in Figures 4–6 and 7–9 of the datasheet. PSM is enabled by default and requires no external configuration.
What is the purpose of the DRVL pin on the ADP1873ARMZ-0.3-R7?
The DRVL pin on the ADP1873ARMZ-0.3-R7 serves dual functions: it drives the gate of the low-side N-channel MOSFET and sets the current-sense amplifier gain via an external resistor connected to PGND. Gain values range from 2.7–26 V/V depending on resistor value, as specified in Table 1 of the datasheet.
Is the ADP1873ARMZ-0.3-R7 pin-compatible with other members of the ADP1872/ADP1873 family?
Yes, all ADP1872/ADP1873 variants-including ADP1873ARMZ-0.3-R7-are pin-compatible in the 10-lead MSOP package. Pin functions, layout, and thermal pad placement are identical across frequency options (-0.3, -0.6, -1.0) and PSM variants, enabling drop-in replacement without PCB changes.
ADP1873ARMZ-0.3-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:
- 300kHz
- Duty Cycle (Max):
- 84%
- 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-0.3-R7 FAQ
1.How can I place an order for ADP1873ARMZ-0.3-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP1873ARMZ-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 ADP1873ARMZ-0.3-R7 reliable?
The price and inventory of ADP1873ARMZ-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 ADP1873ARMZ-0.3-R7 is usually 5 days.
3.What payment methods are accepted for ADP1873ARMZ-0.3-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP1873ARMZ-0.3-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP1873ARMZ-0.3-R7?
ADP1873ARMZ-0.3-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP1873ARMZ-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 ADP1873ARMZ-0.3-R7?
For technical support, including ADP1873ARMZ-0.3-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP1873ARMZ-0.3-R7 requirements.
6.How does Aetrix verify that ADP1873ARMZ-0.3-R7 is sourced from the original manufacturer or authorized distributors?
All ADP1873ARMZ-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 ADP1873ARMZ-0.3-R7 meets industry standards.
7.What is the process for return or replacement of ADP1873ARMZ-0.3-R7?
All ADP1873ARMZ-0.3-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP1873ARMZ-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 ADP1873ARMZ-0.3-R7 part is unused and in its original packaging.
Return procedure for ADP1873ARMZ-0.3-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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