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Analog Devices Inc. ADP1870ACPZ-0.6-R7
- Part No.:
- ADP1870ACPZ-0.6-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 10-VFDFN Exposed Pad, CSP
- Datasheet:
-
ADP1870ACPZ-0.6-R7.pdf
- Description:
- IC REG CTRLR BUCK 10LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,215
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Product details
Overview
ADP1870ACPZ-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 0.6 V output with ±1.0% reference accuracy, operates at 600 kHz, and drives all-N-channel MOSFET power stages in telecom POL supplies and DSP core rails.
For engineers reviewing the ADP1870ACPZ-0.6-R7 datasheet, ADP1870ACPZ-0.6-R7 pinout, ADP1870ACPZ-0.6-R7 application, or ADP1870ACPZ-0.6-R7 equivalent, key selection considerations include its 600 kHz switching frequency, integrated bootstrap diode, valley current-sense architecture, precision enable threshold (245–330 mV), and thermal shutdown at 155°C.
Technical Context
The ADP1870ACPZ-0.6-R7 uses a pseudo-fixed-frequency constant on-time control scheme with valley current-mode sensing to optimize transient response and stability at low duty cycles. Its architecture enables regulation down to 0.6 V while supporting wide VIN range and eliminating external current-sense resistors.
It integrates an internal 5 V LDO (VREG) for gate driver biasing, features programmable current-sense gain via DRVL-to-PGND resistor, and includes soft-start (3.0 ms), hiccup-mode short-circuit protection, and reverse-current protection during startup into precharged loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.95 V to 20 V - supports 5 V, 12 V, and 16.5 V intermediate bus architectures without external regulators. |
| Switching Frequency | 600 kHz - balances efficiency and component size; minimum off-time of 340 ns enables >65% duty cycle at high VIN. |
| Reference Voltage | 0.6 V ±1.0% - ensures tight output regulation for sub-1 V DSP and FPGA core supplies. |
| VREG Output | 5 V ±0.2 V - powers internal circuitry and gate drivers; not intended for external loading. |
| Enable Threshold | 245–330 mV with 37 mV hysteresis - provides precise, noise-immune power sequencing control. |
| Thermal Shutdown | 155°C with 15°C hysteresis - protects against sustained overload or poor PCB thermal design. |
| Package | 10-lead LFCSP (3 mm × 3 mm) - low thermal resistance (θJA = 40°C/W on 4-layer board) for high-power density layouts. |
Pinout & Package
ADP1870ACPZ-0.6-R7 is housed in a 10-lead, 3 mm × 3 mm LFCSP package with exposed pad thermally connected to PGND. The exposed pad must be soldered to a solid ground plane for optimal thermal performance and EMI control.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | High-side MOSFET drain connection | Accepts 2.95–20 V input; connects directly to upper FET drain and bulk input capacitor. |
| COMP/EN | Error amplifier output / enable input | Drives compensation network; pulled below 285 mV disables IC; dual-function simplifies loop tuning and sequencing. |
| FB | Feedback node | Connects to resistor divider from VOUT; senses 0.6 V reference for output regulation. |
| GND | Analog ground reference | Separate analog ground for error amplifier and sensing; must be isolated from noisy power ground paths. |
| VREG | Internal LDO output | 5 V bias supply for gate drivers and internal logic; requires 1 µF to PGND + 0.22 µF to GND bypassing. |
| DRVL | Low-side gate driver output / current-sense gain set | Drives lower N-MOSFET; resistor from DRVL to PGND programs current-sense amplifier gain (5.5–6.5 V/V at 22 kΩ). |
| PGND | Power ground return | Return path for low-side driver and lower MOSFET source; must be tied to GND only at single point near exposed pad. |
| DRVH | High-side gate driver output | Drives upper N-MOSFET gate; integrated bootstrap diode reduces external component count. |
| SW | Switch node | Connection between high- and low-side MOSFETs; routes to inductor and bootstrap capacitor (BST–SW). |
| BST | Bootstrap supply for high-side driver | Connected internally to VREG via diode; requires external capacitor to SW for high-side gate drive voltage generation. |
Key Features
| Feature | Design Value |
|---|---|
| No current-sense resistor required | Valley current sensing via low-side MOSFET RDS(on) eliminates sense resistor losses and layout sensitivity. |
| Integrated bootstrap diode | Reduces external BOM count and improves reliability vs. discrete Schottky solutions in high-reliability POL designs. |
| Starts into precharged load | Enables safe hot-swap operation in redundant power systems without output voltage overshoot or reverse current. |
| Resistor-programmable current-sense gain | Allows optimization of current-limit threshold across different MOSFET RDS(on) values without changing IC or layout. |
| Thermal overload and short-circuit protection | Hiccup-mode current limiting (6 ms timing) prevents thermal runaway during sustained overloads or output shorts. |
Applications
| Telecom POL Supply | DSP Core Power |
|---|---|
Use Scenario: Point-of-load regulation from 12 V or 48 V intermediate bus in base station RF modules. IC Role / Device Role / Timing Role: Synchronous buck controller managing fast load transients from burst-mode DSP processing. Use Value: 600 kHz switching enables compact 0.72 µH inductors and maintains >90% efficiency at 1.8 V/10 A with Infineon BSC042N03MS FETs. | Use Scenario: Core voltage supply for TI C6000 or Analog Devices SHARC processors requiring stable 0.8–1.2 V at up to 15 A. IC Role / Device Role / Timing Role: Valley current-mode controller delivering tight DC accuracy (±1%) and <1% load regulation across −40°C to +125°C. Use Value: 0.6 V reference with ±1.0% tolerance ensures compliance with processor VDDMIN specifications under worst-case thermal and line conditions. |
| Mid-Range Server VRM | Set-Top Box SoC Rail |
Use Scenario: Secondary regulation stage feeding ASICs or memory interfaces in 1U rack servers with 12 V input. IC Role / Device Role / Timing Role: High-efficiency buck controller operating at 600 kHz to minimize EMI filtering requirements in dense board layouts. Use Value: Integrated VREG and bootstrap diode reduce total solution footprint by 30% vs. discrete controller + gate driver + LDO implementations. | Use Scenario: Low-noise, cost-sensitive 1.1 V supply for Broadcom or MediaTek SoCs in consumer STB platforms. IC Role / Device Role / Timing Role: Constant on-time controller enabling rapid transient response to video decode workload spikes. Use Value: Soft-start period (3.0 ms) limits in-rush current during cold start, preventing brownout of shared 5 V system rail. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5116MH/NOPB | Current-mode controller with adjustable slope compensation; requires external current-sense resistor; 50–750 kHz range. | Supports higher input voltages (up to 100 V); less optimized for sub-1 V outputs due to 1.215 V reference. | Choose LM5116MH/NOPB for industrial/high-VIN applications where 0.6 V reference and valley sensing are not required. |
| TPS54620RGYR | Integrated dual MOSFET power stage; fixed 600 kHz; 0.6 V reference; no valley current sensing. | Limited to ≤6 A continuous output; lacks programmable current-sense gain and precharged-load startup. | Choose TPS54620RGYR for space-constrained designs needing full integration but accepting lower current capability and reduced flexibility. |
Compared with LM5116MH/NOPB and TPS54620RGYR, ADP1870ACPZ-0.6-R7 uniquely combines valley current-mode control, resistor-programmable gain, and precharged-load startup-enabling higher efficiency, tighter regulation, and robust sequencing in 0.6–5 V POL applications up to 20 V input.
Availability
ADP1870ACPZ-0.6-R7 is available at Aetrix Electronics and suitable for telecom POL supplies, DSP core power, mid-range server VRMs, and set-top box SoC rails requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for ADP1870ACPZ-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.
The ADP1870ACPZ-0.6-R7 belongs to Analog Devices' high-efficiency synchronous buck controller product line, designed specifically for demanding point-of-load applications requiring fast transient response, wide input range, and precision low-voltage regulation.
FAQ
What is the switching frequency of the ADP1870ACPZ-0.6-R7?
The ADP1870ACPZ-0.6-R7 is factory-configured for 600 kHz operation. This frequency is fixed per part number and cannot be adjusted externally. It balances efficiency, component size, and EMI performance for mid-power POL applications, with typical minimum off-time of 340 ns enabling >65% duty cycle at high input voltages.
Does the ADP1870ACPZ-0.6-R7 require an external current-sense resistor?
No, the ADP1870ACPZ-0.6-R7 does not require an external current-sense resistor. It implements valley current-mode sensing using the RDS(on) of the low-side N-channel MOSFET, with gain programmable via a resistor from DRVL to PGND. This eliminates sense resistor losses and improves efficiency in high-current designs.
Can the ADP1870ACPZ-0.6-R7 start into a precharged output?
Yes, the ADP1870ACPZ-0.6-R7 supports startup into a precharged load. Its internal circuitry prevents reverse current flow during soft start and ensures controlled ramp-up of the output voltage, making it suitable for hot-swap and redundant power supply applications where output capacitors may already be charged.
What is the purpose of the VREG pin on the ADP1870ACPZ-0.6-R7?
The VREG pin on the ADP1870ACPZ-0.6-R7 provides a regulated 5 V internal supply for gate drivers and internal logic. It is not intended for external loading. A 1 µF capacitor to PGND and a 0.22 µF capacitor to GND are required for stability. Loading VREG externally risks regulation loss and device malfunction.
How is the feedback reference voltage accuracy specified for the ADP1870ACPZ-0.6-R7?
The ADP1870ACPZ-0.6-R7 features a 0.6 V reference voltage with ±1.0% accuracy over temperature (−40°C to +125°C). This is confirmed in Table 1 of the datasheet, where VFB is specified as 594.2 mV (min) to 605.8 mV (max) across the full junction temperature range, ensuring reliable regulation for sub-1 V processor cores.
ADP1870ACPZ-0.6-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad, CSP
- 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-LFCSP-WD (3x3)
ADP1870ACPZ-0.6-R7 FAQ
1.How can I place an order for ADP1870ACPZ-0.6-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP1870ACPZ-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 ADP1870ACPZ-0.6-R7 reliable?
The price and inventory of ADP1870ACPZ-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 ADP1870ACPZ-0.6-R7 is usually 5 days.
3.What payment methods are accepted for ADP1870ACPZ-0.6-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP1870ACPZ-0.6-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP1870ACPZ-0.6-R7?
ADP1870ACPZ-0.6-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP1870ACPZ-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 ADP1870ACPZ-0.6-R7?
For technical support, including ADP1870ACPZ-0.6-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP1870ACPZ-0.6-R7 requirements.
6.How does Aetrix verify that ADP1870ACPZ-0.6-R7 is sourced from the original manufacturer or authorized distributors?
All ADP1870ACPZ-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 ADP1870ACPZ-0.6-R7 meets industry standards.
7.What is the process for return or replacement of ADP1870ACPZ-0.6-R7?
All ADP1870ACPZ-0.6-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP1870ACPZ-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 ADP1870ACPZ-0.6-R7 part is unused and in its original packaging.
Return procedure for ADP1870ACPZ-0.6-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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