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Analog Devices Inc. ADP2389ACPZ-R7
- Part No.:
- ADP2389ACPZ-R7
- Manufacturer:
- Analog Devices Inc.
- Package:
- 32-VFQFN Exposed Pad, CSP
- Datasheet:
-
ADP2389ACPZ-R7.pdf
- Description:
- IC REG BUCK ADJ 12A 32LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,827
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Product details
Overview
ADP2389ACPZ-R7 from Analog Devices is a synchronous step-down DC-DC regulator with integrated 17 mΩ high-side and 4.5 mΩ low-side MOSFETs, delivering up to 12 A continuous output current from a 4.5 V to 18 V input. It features programmable switching frequency (200 kHz–2.2 MHz), ±0.5% reference voltage accuracy at 0.6 V, and precision enable/power-good for reliable power sequencing in intermediate rail applications.
For engineers reviewing the ADP2389ACPZ-R7 datasheet, ADP2389ACPZ-R7 pinout, ADP2389ACPZ-R7 application, or ADP2389ACPZ-R7 equivalent, key selection criteria include its programmable current limit (±10% accuracy), external compensation flexibility, fast transient response window control, and operation across −40°C to +125°C junction temperature.
Technical Context
The ADP2389ACPZ-R7 uses fixed-frequency peak current-mode PWM control with cycle-by-cycle overcurrent protection and hiccup-mode fault recovery. Its integrated bootstrap regulator delivers 5 V gate drive (BST–SW) for the high-side MOSFET, while the internal 5 V VREG supplies control circuitry with 100 mA current limit.
It supports startup into precharged outputs via FB-synchronized soft-start ramping and implements fast transient response using an externally set window (via FTW pin) that triggers enhanced loop gain when output deviation exceeds ±1%–±2%, reducing required output capacitance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 18 V - supports wide industrial and server input rails including 5 V, 12 V, and 15 V bus systems. |
| Output Current | 12 A continuous - enables single-chip point-of-load conversion for FPGA, ASIC, and DSP core supplies. |
| Reference Voltage | 0.6 V ±0.5% - ensures tight output regulation down to sub-1 V levels with minimal drift over temperature. |
| Switching Frequency | 200 kHz to 2200 kHz - allows optimization of efficiency vs. size trade-offs via external RT resistor. |
| High-Side RDS(on) | 17 mΩ (typ.) - reduces conduction loss and thermal stress at full load, supporting high-efficiency designs. |
| Low-Side RDS(on) | 4.5 mΩ (typ.) - minimizes synchronous rectification loss, improving light-to-heavy load efficiency. |
| Current Limit Accuracy | ±10% - enables predictable inductor sizing and fault margining without overdesign. |
Pinout & Package
ADP2389ACPZ-R7 is housed in a thermally enhanced 32-lead, 5 mm × 5 mm LFCSP package with dual exposed pads: EP (GND) and EP (SW), requiring soldering to dedicated copper planes for optimal thermal performance (θJA = 41°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SS | Soft Start Control | Capacitor-to-GND sets ramp time; prevents inrush by synchronizing startup with precharged output voltage. |
| COMP | Error Amplifier Output | External RC network provides Type II/III compensation for stable loop response across load/transient conditions. |
| FB | Feedback Sense Input | Monitors resistor-divider output voltage; regulates to 0.6 V reference with ±0.5% accuracy over temperature. |
| VREG | Internal 5 V Regulator Output | Powers internal logic; requires 1 µF ceramic bypass to GND for noise immunity and stability. |
| BST | Bootstrap Supply | Provides gate drive voltage for high-side MOSFET; requires 0.1 µF capacitor between BST and SW pins. |
| RT | Frequency Setting | Resistor-to-GND programs fSW from 200 kHz to 2200 kHz per fSW = 67000/(RT + 12) kHz equation. |
| ILIM | Current-Limit Threshold | Resistor-to-GND sets OCP threshold per IOCP = 1000/(RILIM + 0.5) A; enables precise inductor and layout optimization. |
| FTW | Fast Transient Window | Resistor-to-GND configures ±1% to ±2% output deviation window to activate enhanced transient gain. |
| EN | Precision Enable | 1.2 V typical turn-on threshold with 100 mV hysteresis; supports programmable UVLO and automatic startup. |
| PGOOD | Power-Good Output | Open-drain signal asserts after 16 clock cycles when FB is within ±10%; enables safe power sequencing. |
| SW | Switch Node | Connects to inductor; carries high di/dt switching current; must be routed with short, wide traces to minimize EMI. |
| PGND | Power Ground | Return path for low-side MOSFET; isolated from analog ground to prevent noise coupling into feedback path. |
| PVIN / VIN | Power Inputs | PVIN supplies power stage; VIN powers control circuitry-bypassed separately to reduce supply interaction. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Current Limit | Enables accurate inductor selection and compact solution sizing via ±10% OCP threshold setting with external RILIM. |
| Enhanced Transient Response | Reduces output capacitance requirement by dynamically increasing loop gain when output deviates beyond ±1%–±2% window. |
| External Compensation | Allows full control over loop stability and bandwidth via COMP pin RC network-critical for varying load and layout conditions. |
| Startup into Precharged Output | Prevents reverse current flow by holding low-side MOSFET off until SS voltage exceeds FB voltage during power-up. |
| Integrated High/Low-Side MOSFETs | Eliminates external power switches and associated gate drivers-reducing BOM count, footprint, and layout complexity. |
Applications
| Communication Infrastructure | Networking and Servers |
|---|---|
Use Scenario: Point-of-load conversion for baseband processors and RF transceivers in 5G macro/pico cells. IC Role / Device Role / Timing Role: Primary buck regulator delivering 1.0 V/12 A core supply with fast load-step response to handle burst traffic. Use Value: Integrated MOSFETs and programmable current limit enable compact, high-efficiency design meeting stringent thermal limits in dense RF modules. | Use Scenario: Intermediate rail generation for CPU/GPU VRMs and memory interfaces in rack-mounted servers. IC Role / Device Role / Timing Role: Secondary-stage buck converter stepping 12 V down to 1.8 V/12 A for high-speed SerDes and DDR5 PHYs. Use Value: External compensation and soft start allow precise tuning for dynamic load profiles and multi-rail sequencing requirements. |
| Industrial and Instrumentation | Healthcare and Medical |
Use Scenario: Powering real-time control units and ADC/DAC signal chains in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: Isolated, low-noise 3.3 V/12 A supply with precision enable and PGOOD for deterministic system boot. Use Value: −40°C to +125°C operation and robust OVP/UVP/TSD protections ensure reliability in uncontrolled industrial environments. | Use Scenario: Providing regulated power to imaging sensor arrays and digital processing units in portable ultrasound devices. IC Role / Device Role / Timing Role: Compact 1.2 V/12 A core supply with startup into precharged output to avoid voltage reversal on shared battery rails. Use Value: Fast transient response and programmable frequency reduce output capacitor count-critical for space-constrained handheld form factors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP8770GQ-Z (Monolithic Power Systems) | 12 A rating, 4.5–18 V input, but fixed 600 kHz fSW; no programmable current limit or FTW function. | Lacks fast transient window and adjustable OCP-less suitable for dynamic load applications requiring tight output regulation. | Select ADP2389ACPZ-R7 when design requires fine-grained transient response tuning or inductor optimization via programmable current limit. |
| TPS546B24RVFR (Texas Instruments) | 12 A, 4–18 V input, PMBus interface, and digital loop compensation-but larger 6×6 mm QFN package and higher BOM cost. | Supports telemetry and dynamic configuration via PMBus; not needed in fixed-function analog designs. | Choose ADP2389ACPZ-R7 for cost-sensitive, analog-controlled applications where digital configurability adds unnecessary complexity. |
Compared with MP8770GQ-Z and TPS546B24RVFR, ADP2389ACPZ-R7 offers unique analog programmability (ILIM, FTW, RT) in a compact 5×5 mm LFCSP, enabling optimized efficiency, transient response, and layout simplicity without digital overhead or fixed-frequency constraints.
Availability
ADP2389ACPZ-R7 is available at Aetrix Electronics and suitable for communication infrastructure, networking and servers, and industrial embedded systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ADP2389ACPZ-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 ADP2389ACPZ-R7 belongs to Analog Devices' high-current synchronous buck regulator product line, designed specifically for demanding point-of-load applications requiring efficiency, thermal robustness, and analog configurability in space-constrained systems.
FAQ
What is the maximum continuous output current supported by the ADP2389ACPZ-R7?
The ADP2389ACPZ-R7 supports up to 12 A of continuous output current under proper thermal conditions-enabled by its integrated 17 mΩ high-side and 4.5 mΩ low-side MOSFETs, 5 mm × 5 mm LFCSP package, and dual exposed thermal pads. Actual achievable current depends on PCB layout, ambient temperature, and airflow; thermal derating applies above +85°C ambient.
Does the ADP2389ACPZ-R7 support startup into a precharged output voltage?
Yes, the ADP2389ACPZ-R7 supports startup into a precharged output. Its soft-start circuit monitors the FB pin voltage and holds the low-side MOSFET off until the SS ramp voltage exceeds the FB voltage, preventing reverse current flow and ensuring controlled, glitch-free power-up-critical for systems with shared or battery-backed rails.
How is the switching frequency programmed on the ADP2389ACPZ-R7?
The switching frequency of the ADP2389ACPZ-R7 is programmed using an external resistor (RT) connected from the RT pin to GND. The relationship follows fSW = 67000/(RT + 12) kHz, allowing adjustment from 200 kHz to 2200 kHz. A 100 kΩ resistor sets fSW to 600 kHz, while a 44.2 kΩ resistor yields ~1.2 MHz-enabling optimization of efficiency, size, and EMI performance.
What protection features are integrated into the ADP2389ACPZ-R7?
The ADP2389ACPZ-R7 integrates undervoltage lockout (UVLO), overvoltage protection (OVP), cycle-by-cycle overcurrent protection (OCP), thermal shutdown (TSD) with 25°C hysteresis, and hiccup-mode fault recovery. OVP triggers at 0.7 V FB and recovers at 0.63 V; UVLO activates at 4.2 V rising and releases at 3.7 V falling; TSD trips at 150°C junction temperature.
Can the ADP2389ACPZ-R7 be used in designs requiring precise power sequencing?
Yes, the ADP2389ACPZ-R7 supports precise power sequencing through its precision enable (EN) input with 1.2 V typical threshold and 100 mV hysteresis, plus an open-drain power-good (PGOOD) output that asserts only after FB stabilizes within ±10% for 16 switching cycles. These features allow reliable coordination with other rails in multi-voltage systems such as FPGAs and processors.
ADP2389ACPZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Last Time Buy
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 18V
- Current - Output:
- 12A
- Frequency - Switching:
- 200kHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-LFCSP-VQ (5x5)
ADP2389ACPZ-R7 FAQ
1.How can I place an order for ADP2389ACPZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP2389ACPZ-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 ADP2389ACPZ-R7 reliable?
The price and inventory of ADP2389ACPZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP2389ACPZ-R7 is usually 5 days.
3.What payment methods are accepted for ADP2389ACPZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP2389ACPZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP2389ACPZ-R7?
ADP2389ACPZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP2389ACPZ-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 ADP2389ACPZ-R7?
For technical support, including ADP2389ACPZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP2389ACPZ-R7 requirements.
6.How does Aetrix verify that ADP2389ACPZ-R7 is sourced from the original manufacturer or authorized distributors?
All ADP2389ACPZ-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 ADP2389ACPZ-R7 meets industry standards.
7.What is the process for return or replacement of ADP2389ACPZ-R7?
All ADP2389ACPZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP2389ACPZ-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 ADP2389ACPZ-R7 part is unused and in its original packaging.
Return procedure for ADP2389ACPZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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