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Analog Devices Inc. ADP1878ACPZ-0.6-R7
- Part No.:
- ADP1878ACPZ-0.6-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 14-WFDFN Exposed Pad, CSP
- Datasheet:
-
ADP1878ACPZ-0.6-R7.pdf
- Description:
- IC REG CTRLR BUCK 14LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:2,062
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Product details
Overview
ADP1878ACPZ-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 operates at 600 kHz switching frequency, supports 2.95 V to 20 V input, regulates down to 0.6 V output with ±1.0% reference accuracy, and drives all-N-channel MOSFET power stages in telecom, server, and DSP core supply applications.
For engineers reviewing the ADP1878ACPZ-0.6-R7 datasheet, ADP1878ACPZ-0.6-R7 pinout, ADP1878ACPZ-0.6-R7 application, or ADP1878ACPZ-0.6-R7 equivalent, key selection criteria include its 600 kHz fixed-frequency operation, integrated bootstrap diode, valley-current sensing without external sense resistor, precision 0.6 V feedback reference, and thermal shutdown protection across −40°C to +125°C junction temperature.
Technical Context
The ADP1878ACPZ-0.6-R7 uses a valley current-mode architecture with pseudo-fixed-frequency constant on-time control to deliver fast transient response and stable regulation at low duty cycles. Its internal 5 V LDO (VREG) biases gate drivers and analog circuitry, while the RES pin enables programmable current-sense gain via external resistor selection.
It integrates a bootstrap diode between VREG and BST, eliminates need for external high-side bootstrap diode, and supports start-up into precharged outputs. The device features standalone precision enable input, resistor-programmable soft start, power-good monitoring with internal pull-up, and hiccup-mode short-circuit protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 600 kHz - Fixed operating frequency enabling predictable EMI profile and optimized inductor sizing for mid-frequency power delivery. |
| Input Voltage Range | 2.95 V to 20 V - Supports wide-range industrial and telecom inputs including 3.3 V, 5 V, 12 V, and 16.5 V rails. |
| Output Voltage Reference | 0.6 V ±1.0% - Enables precise low-voltage regulation for modern DSP, FPGA, and ASIC core supplies. |
| VREG Output | 5 V ±0.5 V - Internal bias regulator powers gate drivers and internal circuitry; no external LDO required. |
| Min On Time | 82 ns (typ.) at VIN = 20 V - Supports high step-down ratios (e.g., 12 V → 0.8 V) with stable operation at low duty cycles. |
| Thermal Shutdown | 155°C threshold with 15°C hysteresis - Protects against sustained overload or poor PCB thermal design. |
| Power-Good Threshold | 542–566 mV rising FB - Provides accurate output voltage monitoring with built-in hysteresis for reliable system sequencing. |
Pinout & Package
ADP1878ACPZ-0.6-R7 is housed in a 14-lead LFCSP_WD (Lead Frame Chip Scale Package, Wettable Flank, 3 mm × 3 mm) with exposed pad thermally connected to GND. This package supports high-power density layouts and enhanced thermal dissipation in compact server and networking modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | High-side input supply | Connects to drain of high-side N-MOSFET; accepts up to 20 V input with UVLO at 2.65 V. |
| COMP | Error amplifier output | Interface for Type II/III compensation network to stabilize loop response and optimize transient performance. |
| EN | Precision enable input | Logic-high threshold 605–663 mV; enables robust power sequencing with 31 mV hysteresis. |
| FB | Feedback node | Monitors output via resistor divider; 0.6 V reference sets regulated output voltage (e.g., 0.6 V × (1 + R1/R2)). |
| GND | Analog ground reference | Separate AGND plane for sensitive analog circuitry; must be isolated from PGND except at single-point connection. |
| RES | Current-sense gain select | Resistor to PGND sets gain (e.g., 47 kΩ → 3 V/V); enables accurate current limit without sense resistor. |
| VREG | Internal 5 V bias supply | Provides gate drive and internal bias; bypass with 1 µF to PGND and 0.1 µF to GND per datasheet. |
| SS | Soft-start timing input | Capacitor to GND sets ramp time (10 nF/ms); limits inrush current and prevents reverse current during precharge. |
| PGOOD | Open-drain power-good flag | Sinks current when FB out-of-regulation or thermal shutdown active; requires 3 kΩ pull-up to VREG. |
| DRVL | Low-side gate driver output | Drives source of low-side N-MOSFET; also serves as current-sense gain setting node (shared with RES). |
| PGND | Power ground return | Return path for low-side driver and MOSFET source; separate from AGND to minimize noise coupling. |
| DRVH | High-side gate driver output | Drives gate of high-side N-MOSFET; referenced to SW node; rise/fall times <30 ns with 4.3 nF load. |
| SW | Switch node | Connection point between high- and low-side MOSFETs; critical for layout; ties to BST capacitor negative terminal. |
| BST | Bootstrap supply for high-side driver | Connected internally to VREG via integrated diode; requires external capacitor (BST–SW) for high-side gate bias. |
Key Features
| Feature | Design Value |
|---|---|
| No external current sense resistor | Valley current sensing via RES pin and DRVL terminal eliminates power loss and board space for sense resistor. |
| Integrated bootstrap diode | Internal diode between VREG and BST reduces BOM count and improves reliability versus discrete bootstrap solutions. |
| Start-up into precharged output | Control logic prevents reverse current flow during hot-insertion or system re-power events. |
| Resistor-programmable current limit | External RES resistor selects gain (2.7–26 V/V), enabling flexible overcurrent protection without trimming. |
| Standalone precision enable | EN pin has dedicated threshold and hysteresis-no dependency on VREG or external logic for sequencing control. |
Applications
| Telecom Power Supply | Server Core Regulator |
|---|---|
Use Scenario: Point-of-load (POL) regulation for 48 V intermediate bus to 1.8 V DSP core in base station radio units. IC Role / Device Role / Timing Role: Synchronous buck controller managing high-current, low-voltage rail with tight transient response. Use Value: 600 kHz operation enables small 0.72 µH inductor; ±1.0% reference ensures compliance with DSP core voltage tolerance. |
Use Scenario: CPU/GPU core supply in mid-to-high-end servers requiring dynamic voltage scaling and high efficiency at light loads. IC Role / Device Role / Timing Role: Primary controller for multiphase-compatible single-phase buck stage driving N-channel MOSFETs. Use Value: Valley current mode provides stable regulation at sub-1 V outputs; integrated bootstrap diode simplifies layout in dense VRM designs. |
| Set-Top Box SoC Supply | DSP Core Power |
Use Scenario: 12 V input converted to 0.8 V/10 A for ARM-based multimedia SoC in consumer set-top boxes. IC Role / Device Role / Timing Role: Constant on-time controller delivering fast load-step response for burst-mode video decoding. Use Value: 82 ns minimum on-time supports 12 V → 0.8 V (6.7% duty cycle); thermal shutdown protects against enclosure overheating. |
Use Scenario: Low-noise, high-accuracy 1.2 V supply for real-time digital signal processors in industrial automation controllers. IC Role / Device Role / Timing Role: Precision-regulated buck controller with 0.6 V reference and 542–566 mV PGOOD threshold. Use Value: FB accuracy ±1.0% over −40°C to +125°C ensures consistent DSP performance across environmental extremes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADP1879ACPZ-0.6-R7 | Includes Power Saving Mode (PSM) for pulse-skipping at light loads; identical pinout, specs, and package. | Preferred where >15% light-load efficiency improvement is required (e.g., standby power in networking gear). | Select ADP1879ACPZ-0.6-R7 if PSM is needed; otherwise ADP1878ACPZ-0.6-R7 offers same performance without PSM overhead. |
| TPS54620RGYR | 600 kHz, 17 V max input, 0.6 V reference, but uses current-mode (not valley) control and requires external bootstrap diode. | Used in cost-sensitive industrial supplies where valley current sensing is not mandatory. | Choose TPS54620RGYR only if external diode integration is acceptable and valley-mode stability is not critical. |
Compared with ADP1879ACPZ-0.6-R7, the ADP1878ACPZ-0.6-R7 lacks PSM but matches all timing, protection, and accuracy specs-making it ideal for full-load-dominant systems. Versus TPS54620RGYR, ADP1878ACPZ-0.6-R7 delivers superior low-duty-cycle stability and eliminates a discrete component, reducing layout risk.
Availability
ADP1878ACPZ-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 parametric compliance.
Supply support for ADP1878ACPZ-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 ADP1878/ADP1879 product line targets high-efficiency, high-density DC/DC conversion in telecom, enterprise computing, and multimedia systems-designed specifically for N-channel synchronous buck topologies with minimal external components.
FAQ
What is the switching frequency of the ADP1878ACPZ-0.6-R7?
The ADP1878ACPZ-0.6-R7 operates at a fixed 600 kHz switching frequency, as indicated by the "-0.6" suffix in its part number. This frequency is factory-trimmed and remains stable across input voltage, load, and temperature-enabling predictable EMI filtering and inductor selection per the datasheet's typical application circuits.
Does the ADP1878ACPZ-0.6-R7 require an external bootstrap diode?
No, the ADP1878ACPZ-0.6-R7 integrates a bootstrap diode between VREG and BST pins, eliminating the need for an external Schottky diode. An external BST capacitor (typically 0.1 µF X7R) from BST to SW is still required to sustain high-side gate drive during continuous conduction mode.
Can the ADP1878ACPZ-0.6-R7 start up into a precharged output?
Yes, the ADP1878ACPZ-0.6-R7 supports start-up into a precharged output. Its control architecture actively prevents reverse current flow by disabling the high-side MOSFET until the FB voltage rises above the soft-start threshold-ensuring safe hot-plug operation in modular power systems.
What is the purpose of the RES pin on the ADP1878ACPZ-0.6-R7?
The RES pin on the ADP1878ACPZ-0.6-R7 sets the current-sense amplifier gain by connecting an external resistor to PGND. For example, a 47 kΩ resistor yields 3 V/V gain, enabling accurate overcurrent protection without a power-wasting sense resistor-reducing losses and PCB area.
How does the ADP1878ACPZ-0.6-R7 differ from the ADP1879ACPZ-0.6-R7?
The ADP1878ACPZ-0.6-R7 and ADP1879ACPZ-0.6-R7 share identical pinout, electrical specs, and package-but the ADP1879ACPZ-0.6-R7 adds Power Saving Mode (PSM) for pulse-skipping at light loads. The ADP1878ACPZ-0.6-R7 operates exclusively in forced PWM mode, offering deterministic timing and lower light-load ripple.
ADP1878ACPZ-0.6-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 14-WFDFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- 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):
- 2.95V ~ 20V
- Frequency - Switching:
- 600kHz
- Duty Cycle (Max):
- 65%
- Synchronous Rectifier:
- Yes
- Clock Sync:
- No
- Serial Interfaces:
- -
- Control Features:
- Enable, Power Good, Soft Start
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-LFCSP-WD (4x3)
ADP1878ACPZ-0.6-R7 FAQ
1.How can I place an order for ADP1878ACPZ-0.6-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP1878ACPZ-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 ADP1878ACPZ-0.6-R7 reliable?
The price and inventory of ADP1878ACPZ-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 ADP1878ACPZ-0.6-R7 is usually 5 days.
3.What payment methods are accepted for ADP1878ACPZ-0.6-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP1878ACPZ-0.6-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP1878ACPZ-0.6-R7?
ADP1878ACPZ-0.6-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP1878ACPZ-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 ADP1878ACPZ-0.6-R7?
For technical support, including ADP1878ACPZ-0.6-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP1878ACPZ-0.6-R7 requirements.
6.How does Aetrix verify that ADP1878ACPZ-0.6-R7 is sourced from the original manufacturer or authorized distributors?
All ADP1878ACPZ-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 ADP1878ACPZ-0.6-R7 meets industry standards.
7.What is the process for return or replacement of ADP1878ACPZ-0.6-R7?
All ADP1878ACPZ-0.6-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP1878ACPZ-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 ADP1878ACPZ-0.6-R7 part is unused and in its original packaging.
Return procedure for ADP1878ACPZ-0.6-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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