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Analog Devices Inc. ADP1873ARMZ-1.0-R7
- Part No.:
- ADP1873ARMZ-1.0-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ADP1873ARMZ-1.0-R7.pdf
- Description:
- IC REG CTRLR BUCK 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:8,596
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Product details
Overview
ADP1873ARMZ-1.0-R7 from Analog Devices is a synchronous current-mode PWM buck controller with constant on-time architecture, supporting 1.0 MHz switching frequency, 0.6 V reference accuracy (±1.0%), and power-saving mode (PSM) for light-load efficiency. It drives all-N-channel MOSFET power stages, accepts 3.0–20 V input, and regulates down to 0.6 V output-used in DSP core supplies and high-end server VRMs.
For engineers reviewing the ADP1873ARMZ-1.0-R7 datasheet, ADP1873ARMZ-1.0-R7 pinout, ADP1873ARMZ-1.0-R7 application, or ADP1873ARMZ-1.0-R7 equivalent, key selection criteria include PSM capability, valley current-mode control, integrated bootstrap diode, 10-lead MSOP package, and compatibility with precharged loads and low-duty-cycle operation.
Technical Context
The ADP1873ARMZ-1.0-R7 implements a valley current-mode control scheme with pseudo-fixed frequency operation, enabling stable regulation at low duty cycles. Its constant on-time architecture delivers fast transient response and eliminates need for external current-sense resistors.
It features resistor-programmable current-sense gain (via DRVL-to-PGND), precision enable threshold (235–330 mV), and integrated bootstrap diode for high-side gate drive-reducing external component count while maintaining robust short-circuit and thermal protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.0 MHz - enables compact magnetics and high-density power designs |
| Reference Voltage | 0.6 V ±1.0% - ensures tight output voltage regulation across temperature |
| Input Voltage Range | VIN = 3.0–20 V - supports wide-range industrial and telecom inputs |
| Output Voltage Min | 0.6 V - suitable for modern low-voltage DSP, FPGA, and ASIC cores |
| Power Saving Mode | Enabled - pulse-skipping at light loads improves system efficiency |
| Shutdown Current | 140 µA - minimizes standby power in always-on systems |
| Package | 10-lead MSOP - surface-mount compatible with standard PCB assembly |
Pinout & Package
ADP1873ARMZ-1.0-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 input supply node | Connects to drain of upper N-MOSFET; supports up to 20 V |
| COMP/EN | Error amplifier output / enable input | Logic-high enable threshold 235–330 mV; double-function pin for loop compensation and shutdown |
| FB | Feedback sense input | Non-inverting input to error amp; sets output voltage via resistor divider to 0.6 V reference |
| GND | Analog ground reference | Separate from PGND to minimize noise coupling into sensitive analog circuitry |
| VDD | Bias supply input | 2.75–5.5 V supply powering internal logic and gate drivers |
| DRVL | Low-side MOSFET gate driver output | Also serves as current-sense gain programming terminal (RES connection) |
| PGND | Power ground return | Return path for low-side FET source and driver sink current |
| DRVH | High-side MOSFET gate driver output | Driven by internal bootstrap circuit; requires BST–SW capacitor |
| SW | Switch node | Connection point between high- and low-side FETs; critical for layout and EMI control |
| BST | Bootstrap supply for high-side driver | Internally connected to VDD via integrated diode; requires external BST–SW capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Valley current-mode control | Enables stable operation at very low duty cycles (e.g., 1.8 V out from 16.5 V in) |
| Integrated bootstrap diode | Eliminates need for external Schottky diode; reduces BOM count and layout area |
| Start-up into precharged load | Prevents reverse current flow during soft start when output capacitor is already charged |
| Resistor-programmable current-sense gain | Four gain options (2.7–26 V/V) via single RES resistor from DRVL to PGND |
| Thermal shutdown with hysteresis | Triggers at 155°C junction temperature; 15°C hysteresis prevents oscillation near trip point |
Applications
| Telecom Power Modules | DSP Core Supplies |
|---|---|
Use Scenario: Regulating intermediate bus (12 V or 48 V derived) to 0.8–1.8 V for baseband processors in 5G remote radio units. IC Role / Device Role / Timing Role: Primary synchronous buck controller managing dynamic load transients and PSM entry/exit during burst-mode operation. Use Value: 1.0 MHz operation allows <1.2 µH inductors; PSM extends battery life in portable backhaul units. | Use Scenario: Providing tightly regulated 1.8 V supply to high-speed digital signal processors in medical imaging systems. IC Role / Device Role / Timing Role: Precision voltage regulator with ±1.0% reference accuracy and fast transient response for low-noise analog front-end synchronization. Use Value: Valley current-mode control maintains stability under rapid load steps typical in FFT-accelerated processing. |
| Mid-to-High-End Servers | Set-Top Box SoC Rails |
Use Scenario: Generating 0.6–1.2 V CPU/GPU core rails in enterprise servers with multi-phase scaling requirements. IC Role / Device Role / Timing Role: Single-phase controller used in multiphase configurations; synchronized via external clock or phase-locked timing. Use Value: 140 µA shutdown current and PSM reduce idle power in data center power management subsystems. | Use Scenario: Delivering 0.9 V and 1.1 V rails to ARM-based SoCs in premium set-top boxes with HDMI 2.1 and AV1 decoding. IC Role / Device Role / Timing Role: High-efficiency point-of-load regulator operating in PSM during video playback standby states. Use Value: Integrated bootstrap diode and no external current-sense resistor simplify layout in space-constrained consumer enclosures. |
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-1.0-R7 | No power-saving mode (PSM); fixed PWM only | Suitable where continuous switching is required for EMI predictability or noise-sensitive analog sections | Select ADP1872ARMZ-1.0-R7 if PSM-induced frequency variation is unacceptable in your system |
| TPS54620RGYR | Fixed 600 kHz frequency; no programmable current-sense gain; requires external current-sense resistor | Lower cost alternative for non-PSM, non-ultra-low-VOUT applications; lacks valley current-mode architecture | Choose TPS54620RGYR when design prioritizes TI ecosystem support and simpler compensation over ultra-low duty cycle capability |
Compared with ADP1873ARMZ-1.0-R7, ADP1872ARMZ-1.0-R7 removes PSM but retains identical pinout and control architecture, while TPS54620RGYR offers TI-specific features like Eco-mode but requires redesign for current sensing and lacks sub-1 VOUT optimization.
Availability
ADP1873ARMZ-1.0-R7 is available at Aetrix Electronics and suitable for telecom power modules, DSP core supplies, and mid-to-high-end server VRMs requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for ADP1873ARMZ-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The ADP187x product line delivers high-efficiency, high-frequency synchronous buck controllers optimized for low-voltage, high-current digital loads in computing and infrastructure equipment.
FAQ
What is the minimum input voltage supported by the ADP1873ARMZ-1.0-R7?
The ADP1873ARMZ-1.0-R7 requires a minimum VIN of 3.0 V when configured for 1.0 MHz operation, as specified in Table 1 of the Rev. B datasheet. This higher minimum compared to the 300 kHz and 600 kHz variants (2.75 V) ensures stable high-frequency switching performance and adequate gate drive margin for the external N-MOSFETs.
Does the ADP1873ARMZ-1.0-R7 require an external current-sense resistor?
No, the ADP1873ARMZ-1.0-R7 does not require an external current-sense resistor. It uses low-side MOSFET RDS(on) sensing with resistor-programmable gain via the DRVL-to-PGND RES pin, eliminating the power loss and board area associated with discrete sense resistors.
How does the power-saving mode (PSM) function in the ADP1873ARMZ-1.0-R7?
In the ADP1873ARMZ-1.0-R7, PSM operates by pulse-skipping at light loads to maintain output regulation while reducing switching losses. Unlike forced PWM, PSM dynamically disables switching cycles when output current falls below a threshold, improving light-load efficiency without compromising regulation accuracy.
Can the ADP1873ARMZ-1.0-R7 start up into a precharged output capacitor?
Yes, the ADP1873ARMZ-1.0-R7 supports startup into a precharged load. Its internal soft-start circuit includes reverse-current protection that prevents inductor current reversal during initial ramp-up, making it suitable for hot-swap and redundant power supply applications.
What is the purpose of the BST pin on the ADP1873ARMZ-1.0-R7?
The BST pin on the ADP1873ARMZ-1.0-R7 provides the bootstrap supply for the high-side gate driver. An internal diode connects VDD to BST, and an external capacitor between BST and SW generates the floating voltage needed to fully enhance the upper N-channel MOSFET-eliminating the need for an external bootstrap diode in most designs.
ADP1873ARMZ-1.0-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Output Type:
- Transistor Driver
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Number of Outputs:
- 1
- Output Phases:
- 1
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 20V
- Frequency - Switching:
- 1MHz
- Duty Cycle (Max):
- 45%
- 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-1.0-R7 FAQ
1.How can I place an order for ADP1873ARMZ-1.0-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP1873ARMZ-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 ADP1873ARMZ-1.0-R7 reliable?
The price and inventory of ADP1873ARMZ-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 ADP1873ARMZ-1.0-R7 is usually 5 days.
3.What payment methods are accepted for ADP1873ARMZ-1.0-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP1873ARMZ-1.0-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP1873ARMZ-1.0-R7?
ADP1873ARMZ-1.0-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP1873ARMZ-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 ADP1873ARMZ-1.0-R7?
For technical support, including ADP1873ARMZ-1.0-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP1873ARMZ-1.0-R7 requirements.
6.How does Aetrix verify that ADP1873ARMZ-1.0-R7 is sourced from the original manufacturer or authorized distributors?
All ADP1873ARMZ-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 ADP1873ARMZ-1.0-R7 meets industry standards.
7.What is the process for return or replacement of ADP1873ARMZ-1.0-R7?
All ADP1873ARMZ-1.0-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP1873ARMZ-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 ADP1873ARMZ-1.0-R7 part is unused and in its original packaging.
Return procedure for ADP1873ARMZ-1.0-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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