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Analog Devices Inc. ADP1870ARMZ-0.6-R7
- Part No.:
- ADP1870ARMZ-0.6-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ADP1870ARMZ-0.6-R7.pdf
- Description:
- IC REG CTRLR BUCK 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,000
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Product details
Overview
ADP1870ARMZ-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 output as low as 0.6 V with ±1.0% reference accuracy, operates at 600 kHz switching frequency, and drives all-N-channel MOSFET power stages without external current-sense resistors-ideal for DSP core and 12 V POL supplies.
For engineers reviewing the ADP1870ARMZ-0.6-R7 datasheet, ADP1870ARMZ-0.6-R7 pinout, ADP1870ARMZ-0.6-R7 application, or ADP1870ARMZ-0.6-R7 equivalent, key selection considerations include its 600 kHz fixed-frequency operation, valley current-limit programmability via DRVL resistor, integrated bootstrap diode, precision enable threshold (245–330 mV), and thermal shutdown at 155°C.
Technical Context
The ADP1870ARMZ-0.6-R7 uses a pseudo-fixed-frequency constant on-time architecture combined with valley current-mode sensing to ensure fast transient response and stable regulation across wide duty-cycle ranges. Its valley current detection enables accurate current limiting and optimal low-duty-cycle performance down to 0.6 V output.
Control logic integrates an internal 5 V LDO (VREG) for gate drivers and biasing, supports start-up into precharged loads, and includes undervoltage lockout (2.65 V rising, 190 mV hysteresis), soft-start (3.0 ms), and hiccup-mode short-circuit protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.95 V to 20 V - supports wide-input industrial and telecom rails including 5 V, 12 V, and 16.5 V sources. |
| Switching Frequency | 600 kHz - enables compact magnetics and high power density while balancing efficiency and EMI. |
| Output Voltage Reference | 0.6 V ±1.0% - ensures tight regulation for low-voltage DSP, FPGA, and ASIC core supplies. |
| Current-Sense Gain | Programmable via DRVL-to-PGND resistor (e.g., 6 V/V at 22 kΩ) - eliminates need for sense resistor and allows precise current-limit tuning. |
| Thermal Shutdown | 155°C with 15°C hysteresis - provides robust overtemperature protection in high-power-density layouts. |
| Enable Threshold | 245–330 mV logic-high with 37 mV hysteresis - enables precise power sequencing and system-level control. |
| Integrated Bootstrap Diode | Yes - reduces external component count and improves high-side gate drive reliability. |
Pinout & Package
ADP1870ARMZ-0.6-R7 is housed in a 10-lead MSOP package with exposed pad (must be connected to GND). The package supports high thermal performance on 4-layer PCBs (θJA = 171.7°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | High-side MOSFET drain connection | Primary input rail connection; powers internal regulator and high-side driver circuitry. |
| COMP/EN | Error amplifier output / Enable input | Active-low enable: <285 mV disables IC; also serves as compensation node for loop stability tuning. |
| FB | Feedback voltage sense input | Connects to resistor divider from VOUT; regulates output by comparing to 0.6 V internal reference. |
| GND | Analog ground reference | Reference for sensitive analog blocks (error amp, current sense); must be isolated from noisy PGND. |
| VREG | Internal 5 V LDO output | Bias supply for gate drivers and internal circuitry; not intended for external loading. |
| DRVL | Low-side MOSFET gate driver / current-sense gain set | Drives lower N-FET; resistor from DRVL to PGND sets current-sense amplifier gain (6 V/V typical at 22 kΩ). |
| PGND | Power ground return | Return path for low-side driver and source of lower MOSFET; separates high-current paths from analog ground. |
| DRVH | High-side MOSFET gate driver | Drives upper N-FET gate via bootstrap capacitor; features 0.7 Ω sink and 3 Ω source resistance. |
| SW | Switch node | Connection point between high- and low-side MOSFETs; ties to inductor and bootstrap capacitor. |
| BST | Bootstrap capacitor connection | Connected to SW via capacitor; internal diode charges BST from VREG during low-side conduction. |
Key Features
| Feature | Design Value |
|---|---|
| No current-sense resistor required | Valley current sensing via DRVL terminal eliminates external sense resistor, reducing BOM cost and board area. |
| Starts into precharged load | Enables safe power-up in systems where output capacitors are already charged, avoiding reverse current flow. |
| Integrated bootstrap diode | Reduces external component count and improves reliability versus discrete bootstrap solutions. |
| Resistor-programmable current limit | Allows precise tuning of overcurrent protection threshold using standard resistor values (e.g., 22 kΩ → 6 V/V gain). |
| Constant on-time + valley current mode | Delivers superior transient response and stable operation across wide VIN/VOUT ratios and light-load conditions. |
Applications
| Telecom Point-of-Load Supply | DSP Core Power Supply |
|---|---|
Use Scenario: Regulating 12 V intermediate bus to 1.8 V for baseband processors in 4G/LTE remote radio units. IC Role / Device Role / Timing Role: Synchronous buck controller managing high-efficiency, high-transient-response DC/DC conversion with 600 kHz switching. Use Value: Achieves >90% efficiency at 5 A load (VIN = 13 V, VOUT = 1.8 V) while maintaining ±1% output accuracy across −40°C to +125°C. | Use Scenario: Providing tightly regulated 0.8 V core voltage to multi-core digital signal processors in radar processing modules. IC Role / Device Role / Timing Role: Valley current-mode controller delivering sub-1% reference accuracy and fast load-step response for dynamic DSP workloads. Use Value: Maintains 0.795–0.805 V output across 0–10 A load range at +125°C, enabling reliable high-speed computation under thermal stress. |
| Mid-Range Server VRM | Set-Top Box SoC Supply |
Use Scenario: Generating 5 V or 7 V intermediate rails from 12 V backplane in edge-server motherboard power delivery networks. IC Role / Device Role / Timing Role: Fixed-frequency synchronous controller supporting all-N-FET topology with programmable current limit for scalable current handling. Use Value: Delivers >85% efficiency at full load (VIN = 12 V, VOUT = 5 V, 600 kHz) with no external current-sense resistor, simplifying layout and thermal design. | Use Scenario: Powering ARM-based media SoCs in consumer set-top boxes requiring low-noise, high-accuracy 1.2 V or 1.8 V supplies. IC Role / Device Role / Timing Role: Constant on-time buck controller ensuring stable regulation during burst-mode video decoding and HDMI hot-plug events. Use Value: Provides <15 mV output deviation under 100 mA–3 A load steps and maintains regulation during input dips to 2.95 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54620RGYR | 600 kHz fixed-frequency, 4.5–17 V input, 0.6 V reference, but requires external current-sense resistor and lacks integrated bootstrap diode. | Targeted at space-constrained designs where external sense resistor is acceptable and higher quiescent current (1.8 mA vs. 1.1 mA) is tolerable. | Select when needing TI's WEBENCH support or compatibility with existing TI-based reference designs. |
| ISL85415IRZ-T7A | 600 kHz, 3–18 V input, 0.6 V reference, integrated FETs (not controller-only), no valley current sensing - uses average current mode. | Suitable for lower-current (<5 A), simplified designs where integrated power stage suffices and valley-mode transient performance is not critical. | Choose for rapid prototyping with fewer external components, accepting trade-offs in peak efficiency and transient response. |
Compared with TPS54620RGYR and ISL85415IRZ-T7A, the ADP1870ARMZ-0.6-R7 uniquely combines valley current-mode control, resistor-programmable gain, and integrated bootstrap diode - enabling higher efficiency, tighter current limiting, and reduced BOM count in medium-to-high current controller-based designs.
Availability
ADP1870ARMZ-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 parametric compliance across temperature extremes.
Supply support for ADP1870ARMZ-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 technologies, serving industrial, automotive, communications, and healthcare markets.
The ADP1870/ADP1871 product line was engineered for high-efficiency, high-transient-response synchronous buck control in demanding point-of-load applications - emphasizing valley current sensing, wide input range, and minimal external component count.
FAQ
What is the switching frequency of the ADP1870ARMZ-0.6-R7?
The ADP1870ARMZ-0.6-R7 is factory-configured for 600 kHz nominal switching frequency. This value is fixed per variant and verified across temperature (−40°C to +125°C) and input voltage (2.95 V to 20 V), with typical variation ±5% under load. Frequency remains stable due to constant on-time architecture with valley current feedback.
Does the ADP1870ARMZ-0.6-R7 require an external current-sense resistor?
No, the ADP1870ARMZ-0.6-R7 does not require an external current-sense resistor. It implements valley current sensing through the DRVL pin, where a resistor from DRVL to PGND sets the current-sense amplifier gain (e.g., 22 kΩ yields 6 V/V). This eliminates power loss and board area associated with shunt resistors.
What is the minimum output voltage supported by the ADP1870ARMZ-0.6-R7?
The ADP1870ARMZ-0.6-R7 supports a minimum output voltage of 0.6 V, matching its internal reference voltage accuracy of ±1.0% over temperature (−40°C to +125°C). This enables direct regulation of ultra-low-voltage cores such as modern DSPs and ASICs without external scaling circuitry.
Can the ADP1870ARMZ-0.6-R7 start up into a precharged output?
Yes, the ADP1870ARMZ-0.6-R7 supports start-up into a precharged output. Its control architecture prevents reverse current flow during soft-start by monitoring the FB pin and delaying high-side FET turn-on until output voltage rises above the regulated setpoint, protecting downstream components and ensuring safe power sequencing.
What package type is used for the ADP1870ARMZ-0.6-R7?
The ADP1870ARMZ-0.6-R7 uses a 10-lead MSOP package with exposed thermal pad. The exposed pad must be soldered to a GND plane for optimal thermal performance (θJA = 171.7°C/W on 4-layer board). This package balances compact size, manufacturability, and thermal capability for mid-power POL applications.
ADP1870ARMZ-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):
- 2.95V ~ 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
ADP1870ARMZ-0.6-R7 FAQ
1.How can I place an order for ADP1870ARMZ-0.6-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP1870ARMZ-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 ADP1870ARMZ-0.6-R7 reliable?
The price and inventory of ADP1870ARMZ-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 ADP1870ARMZ-0.6-R7 is usually 5 days.
3.What payment methods are accepted for ADP1870ARMZ-0.6-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP1870ARMZ-0.6-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP1870ARMZ-0.6-R7?
ADP1870ARMZ-0.6-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP1870ARMZ-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 ADP1870ARMZ-0.6-R7?
For technical support, including ADP1870ARMZ-0.6-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP1870ARMZ-0.6-R7 requirements.
6.How does Aetrix verify that ADP1870ARMZ-0.6-R7 is sourced from the original manufacturer or authorized distributors?
All ADP1870ARMZ-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 ADP1870ARMZ-0.6-R7 meets industry standards.
7.What is the process for return or replacement of ADP1870ARMZ-0.6-R7?
All ADP1870ARMZ-0.6-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP1870ARMZ-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 ADP1870ARMZ-0.6-R7 part is unused and in its original packaging.
Return procedure for ADP1870ARMZ-0.6-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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