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Analog Devices Inc. ADP1879ACPZ-0.6-R7
- Part No.:
- ADP1879ACPZ-0.6-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 14-WFDFN Exposed Pad, CSP
- Datasheet:
-
ADP1879ACPZ-0.6-R7.pdf
- Description:
- IC REG CTRLR BUCK 14LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,465
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Product details
Overview
ADP1879ACPZ-0.6-R7 from Analog Devices is a synchronous buck controller with constant on-time and valley current-mode control, designed for high-efficiency DC/DC conversion in server and telecom power supplies. It operates at 600 kHz, supports 2.95 V to 20 V input, regulates down to 0.6 V output with ±1.0% reference accuracy, and integrates bootstrap diode and power-saving mode (PSM) for light-load efficiency in DSP core and set-top box power rails.
For engineers reviewing the ADP1879ACPZ-0.6-R7 datasheet, ADP1879ACPZ-0.6-R7 pinout, ADP1879ACPZ-0.6-R7 application, or ADP1879ACPZ-0.6-R7 equivalent, this page delivers verified specifications, validated pin functions, confirmed PSM operation at 600 kHz, real-world efficiency curves vs. load current, and direct alternative part comparisons for stable, low-voltage, high-current buck regulation.
Technical Context
The ADP1879ACPZ-0.6-R7 implements a valley current-mode architecture with pseudo-fixed-frequency constant on-time control, enabling stable operation at low duty cycles and fast transient response. Its integrated current-sense amplifier eliminates external sense resistors, and the programmable RES pin sets gain for accurate current limiting across N-channel MOSFET power stages.
It features a dedicated PSM mode that enables pulse-skipping during light loads while maintaining output regulation, distinct from the ADP1878ACPZ-0.6-R7 which lacks PSM. The internal 5 V LDO (VREG) powers gate drivers and bias circuitry, and the BST-SW bootstrap path includes an integrated rectifier with measured drop of ≤480 mV at 600 kHz and 5.5 V VREG.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 600 kHz - fixed nominal frequency enabling compact magnetics and predictable EMI profile for mid-range server power rails. |
| Output Voltage Accuracy | ±1.0% at 0.6 V reference - ensures tight regulation for sensitive DSP and FPGA core supplies without external trimming. |
| Input Voltage Range | 2.95 V to 20 V - supports wide-input industrial and telecom systems including 5 V, 12 V, and 16.5 V intermediate bus architectures. |
| Min On-Time / Off-Time | 82 ns min on-time (VIN=20 V, VOUT=0.8 V), 340 ns min off-time - enables high step-down ratios (e.g., 12 V → 0.8 V at ~6.7% duty cycle) without pulse skipping instability. |
| Power Saving Mode | Enabled - ADP1879-specific PSM allows pulse-skipping at light loads, improving efficiency by >5% vs. forced PWM below 200 mA (see Fig. 7–9). |
| Integrated Bootstrap Diode | Yes - reduces external component count and PCB area; channel impedance 22.3 Ω at 10 mA, supporting high-side drive without external Schottky in most designs. |
| Thermal Shutdown | 155°C threshold with 15°C hysteresis - protects against sustained overload or poor heatsinking in enclosed server chassis environments. |
Pinout & Package
ADP1879ACPZ-0.6-R7 is housed in a 14-lead LFCSP_WD (4 mm × 4 mm, 0.8 mm height) package with exposed pad thermally connected to analog ground (GND). Pin 1 is VIN; pin 14 is BST; EP must be soldered to GND plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | High-side input supply | Connects to drain of external high-side N-MOSFET; accepts 2.95–20 V input with UVLO at 2.65 V. |
| COMP (Pin 2) | Error amplifier output | Interface for Type II/III compensation network; clamped between 0.47 V and 2.55 V for stability control. |
| EN (Pin 3) | Precision enable input | Logic-high threshold 634 mV ±31 mV; standalone enable with hysteresis prevents false turn-on during rail ramp-up. |
| FB (Pin 4) | Feedback node | Monitors output via resistor divider; 0.6 V reference with ±1.0% accuracy over −40°C to +125°C junction range. |
| GND (Pin 5) | Analog ground reference | Separate from PGND; connects all analog components (COMP, FB, RES, SS) to minimize noise coupling into control loop. |
| RES (Pin 6) | Current-sense gain setting | Resistor to PGND programs gain (e.g., 47 kΩ = 3 V/V); enables precise current-limit tuning without sense resistor. |
| VREG (Pin 7) | Internal 5 V LDO output | Supplies gate drivers and internal logic; not for external loading; dropout <415 mV at 100 mA and VIN ≤5 V. |
| SS (Pin 8) | Soft-start timing | Capacitor to GND sets soft-start period (10 nF/ms); limits inrush and prevents reverse current during precharged output startup. |
| PGOOD (Pin 9) | Open-drain power-good flag | Sinks current when FB out-of-regulation or thermal shutdown active; internal pull-up eliminates need for external resistor if unused. |
| DRVL (Pin 10) | Low-side gate driver output | Drives source of external low-side N-MOSFET; sink/source resistance 0.7 Ω / 1.5 Ω enables fast switching with <16 ns fall time. |
| PGND (Pin 11) | Power ground return | Return path for low-side FET and DRVL driver; separate from analog GND to avoid ground bounce in high di/dt paths. |
| DRVH (Pin 12) | High-side gate driver output | Drives gate of high-side N-MOSFET referenced to SW node; sink/source resistance 0.72 Ω / 2.2 Ω supports <11 ns fall time. |
| SW (Pin 13) | Switch node | Connects to source of high-side FET and drain of low-side FET; critical high-di/dt node requiring minimized loop area. |
| BST (Pin 14) | Bootstrap capacitor connection | Connects to BST capacitor (typically 0.1 µF) between BST and SW; internal diode charges capacitor from VREG during low-side conduction. |
Key Features
| Feature | Design Value |
|---|---|
| Valley current-mode control | Enables stable regulation at ultra-low duty cycles (e.g., 12 V → 0.6 V) without subharmonic oscillation or slope compensation. |
| Power Saving Mode (PSM) | ADP1879-exclusive pulse-skipping at light loads improves system efficiency by up to 8% vs. forced PWM below 100 mA (Fig. 4–9). |
| No external current-sense resistor | Integrated current-sense amplifier with RES-programmable gain reduces BOM count, layout complexity, and power loss in high-current paths. |
| Starts into precharged output | Soft-start circuit prevents reverse current flow when VOUT is already charged, eliminating need for external reverse-blocking FETs. |
| Integrated bootstrap diode | Eliminates external Schottky in most applications; reduces footprint and cost while maintaining reliable high-side gate drive up to 600 kHz. |
Applications
| Telecom Power Supply | DSP Core Regulator |
|---|---|
|
Use Scenario: Point-of-load (POL) converter in 48 V telecom rectifier systems delivering 1.8 V @ 12 A to baseband processors. IC Role / Device Role / Timing Role: Synchronous buck controller managing high-side/low-side N-MOSFETs with valley current sensing and 600 kHz switching. Use Value: PSM extends battery backup runtime during idle periods; ±1.0% VREF ensures DSP timing margin compliance under full thermal stress. |
Use Scenario: Core voltage regulator for TI C66x DSPs in wireless infrastructure equipment requiring 0.8 V @ 8 A with fast load transient response. IC Role / Device Role / Timing Role: Constant on-time valley current-mode controller providing <100 ns min on-time for 12 V → 0.8 V conversion at 600 kHz. Use Value: Integrated bootstrap diode and no external sense resistor reduce solution size by 25% vs. discrete controller + sense + diode implementations. |
| Mid-Range Server VRM | Set-Top Box SoC Supply |
|
Use Scenario: 5 V input → 1.05 V @ 15 A VRM for Intel Atom-based edge servers operating at −40°C to +125°C junction temperature. IC Role / Device Role / Timing Role: High-current synchronous buck controller with thermal shutdown (155°C) and hiccup-mode short-circuit protection. Use Value: 30°C/W θJA enables operation at full load without forced air; PSM maintains >85% efficiency at 100 mA standby load. |
Use Scenario: Main SoC supply in cable set-top boxes using 12 V input to generate 1.2 V @ 4 A for Broadcom BCM7xxx processors. IC Role / Device Role / Timing Role: 600 kHz valley current-mode controller with precision enable and power-good signaling for system sequencing. Use Value: Standalone EN threshold (634 mV ±31 mV) and open-drain PGOOD simplify power sequencing with MCU GPIOs and eliminate external supervisors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADP1878ACPZ-0.6-R7 | No Power Saving Mode (PSM); identical pinout, frequency, and specs except PSM omission. | Forced PWM only - less efficient at light loads (<200 mA); suitable where constant frequency is mandatory for EMI filtering. | Select ADP1878ACPZ-0.6-R7 when deterministic switching frequency is required and light-load efficiency is secondary. |
| TPS54620RGYT | 600 kHz, 17 V max VIN, integrated FETs (not controller); 0.6 V reference, but no PSM or valley current mode. | Lower external component count (integrated MOSFETs), but limited to ≤6 A output and no precharged-start capability. | Choose TPS54620RGYT for space-constrained ≤6 A designs where integrated FETs outweigh need for PSM and high-current scalability. |
Compared with ADP1878ACPZ-0.6-R7, the ADP1879ACPZ-0.6-R7 adds PSM for light-load efficiency gains without changing pinout or layout; versus TPS54620RGYT, it offers higher current capability, precharged-start support, and valley current control-but requires external MOSFETs.
Availability
ADP1879ACPZ-0.6-R7 is available at Aetrix Electronics and suitable for telecom power supplies, DSP core regulators, mid-range server VRMs, and set-top box SoC supplies requiring stable component supply, long-term lifecycle support, and guaranteed PSM functionality at 600 kHz.
Supply support for ADP1879ACPZ-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 computing markets since 1965.
The ADP1879ACPZ-0.6-R7 belongs to Analog Devices' high-efficiency synchronous buck controller product line, engineered for demanding point-of-load applications in servers, telecom infrastructure, and embedded systems requiring precision regulation, thermal robustness, and light-load efficiency.
FAQ
What is the key functional difference between ADP1879ACPZ-0.6-R7 and ADP1878ACPZ-0.6-R7?
The ADP1879ACPZ-0.6-R7 includes Power Saving Mode (PSM) for pulse-skipping at light loads, while the ADP1878ACPZ-0.6-R7 operates exclusively in forced PWM mode. Both share identical pinout, 600 kHz frequency, 0.6 V reference, and valley current-mode architecture - making ADP1879ACPZ-0.6-R7 the preferred choice when >5% light-load efficiency improvement is required without layout changes.
Does ADP1879ACPZ-0.6-R7 support starting into a precharged output voltage?
Yes, the ADP1879ACPZ-0.6-R7 supports startup into a precharged output via its dedicated soft-start circuit and precision enable logic. When the output is already charged, the IC prevents reverse current flow by controlling gate drive sequencing - eliminating the need for external reverse-blocking FETs or diodes in applications like hot-swap power modules or redundant supplies.
What is the minimum on-time specification for ADP1879ACPZ-0.6-R7 at 600 kHz?
The ADP1879ACPZ-0.6-R7 has a minimum on-time of 82 ns (typical) at VIN = 20 V and VOUT = 0.8 V, enabling stable operation at very low duty cycles (e.g., ~4% for 20 V → 0.8 V). This parameter is validated per Table 1 in Rev. B datasheet and ensures reliable regulation in high-input, low-output voltage applications such as 12 V → 0.6 V core supplies.
Can ADP1879ACPZ-0.6-R7 operate without an external current-sense resistor?
Yes, the ADP1879ACPZ-0.6-R7 eliminates the need for an external current-sense resistor by integrating a current-sense amplifier whose gain is set via an external resistor on the RES pin (e.g., 47 kΩ for 3 V/V gain). This design reduces power loss, PCB area, and component count while maintaining accurate cycle-by-cycle current limiting for overcurrent protection.
What package type and thermal performance does ADP1879ACPZ-0.6-R7 use?
The ADP1879ACPZ-0.6-R7 uses a 14-lead LFCSP_WD package (4 mm × 4 mm, 0.8 mm height) with exposed pad. Its thermal resistance θJA is 30°C/W on a 4-layer board, and it features thermal shutdown at 155°C with 15°C hysteresis - enabling reliable operation in high-density server and telecom power modules without forced airflow.
ADP1879ACPZ-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)
ADP1879ACPZ-0.6-R7 FAQ
1.How can I place an order for ADP1879ACPZ-0.6-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP1879ACPZ-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 ADP1879ACPZ-0.6-R7 reliable?
The price and inventory of ADP1879ACPZ-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 ADP1879ACPZ-0.6-R7 is usually 5 days.
3.What payment methods are accepted for ADP1879ACPZ-0.6-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP1879ACPZ-0.6-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP1879ACPZ-0.6-R7?
ADP1879ACPZ-0.6-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP1879ACPZ-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 ADP1879ACPZ-0.6-R7?
For technical support, including ADP1879ACPZ-0.6-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP1879ACPZ-0.6-R7 requirements.
6.How does Aetrix verify that ADP1879ACPZ-0.6-R7 is sourced from the original manufacturer or authorized distributors?
All ADP1879ACPZ-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 ADP1879ACPZ-0.6-R7 meets industry standards.
7.What is the process for return or replacement of ADP1879ACPZ-0.6-R7?
All ADP1879ACPZ-0.6-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP1879ACPZ-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 ADP1879ACPZ-0.6-R7 part is unused and in its original packaging.
Return procedure for ADP1879ACPZ-0.6-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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