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Analog Devices Inc. ADP2384ACPZN-R7
- Part No.:
- ADP2384ACPZN-R7
- Manufacturer:
- Analog Devices Inc.
- Package:
- 24-WFQFN Exposed Pad, CSP
- Datasheet:
-
ADP2384ACPZN-R7.pdf
- Description:
- IC REG BUCK ADJ 4A 24LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,363
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Product details
Overview
ADP2384ACPZN-R7 from Analog Devices is a synchronous step-down DC-to-DC regulator with integrated 44 mΩ high-side and 11.6 mΩ low-side MOSFETs, delivering up to 4 A continuous output current across 4.5 V–20 V input range, featuring programmable 200 kHz–1.4 MHz switching frequency and precision 0.6 V ±1% feedback reference-used in intermediate power rail conversion for networking and industrial equipment.
For engineers reviewing the ADP2384ACPZN-R7 datasheet, ADP2384ACPZN-R7 pinout, ADP2384ACPZN-R7 application, or ADP2384ACPZN-R7 equivalent, key selection considerations include its LFCSP-24 (4 mm × 4 mm) thermal performance, external compensation flexibility, 180° out-of-phase synchronization capability, and support for startup into precharged outputs.
Technical Context
The ADP2384ACPZN-R7 employs peak current-mode PWM control with fixed-frequency operation and internal slope compensation, enabling fast transient response and stable regulation across wide load and line variations. Its integrated bootstrap circuit generates a regulated 5 V gate drive between BST and SW pins, while the internal 8 V VREG supplies bias for control logic and error amplifier.
It implements comprehensive protection including undervoltage lockout (UVLO) with 4.5 V rising threshold, overvoltage protection (OVP) triggered at 0.7 V FB, hiccup-mode overcurrent protection, and thermal shutdown at 150°C with 25°C hysteresis-ensuring robust operation in demanding embedded power systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 20 V - supports wide-input industrial and telecom rails without external pre-regulation |
| Output Current | 4 A continuous - enables single-chip solution for intermediate bus conversion up to 20 W at 5 V |
| Feedback Reference | 0.6 V ±1% - allows precise low-voltage output setting (e.g., 1.2 V with 1:1 resistor divider) with minimal drift over temperature |
| Switching Frequency | 200 kHz to 1.4 MHz - adjustable via RT resistor or external SYNC clock for EMI optimization and layout flexibility |
| MOSFET RDS(on) | 44 mΩ (HS) / 11.6 mΩ (LS) - minimizes conduction loss and improves full-load efficiency (>90% at 12 VIN/3.3 VOUT) |
| Package | 24-lead LFCSP (4 mm × 4 mm) - exposes SW and GND pads for direct thermal coupling to PCB copper planes |
| Protection Features | UVLO, OVP, OCP (hiccup), SCP, TSD - eliminates need for discrete fault management circuitry |
Pinout & Package
ADP2384ACPZN-R7 is housed in a 24-lead, 4 mm × 4 mm Lead Frame Chip Scale Package (LFCSP_WQ) with dual exposed thermal pads: EP-GND (pin 25) must be soldered to a large PCB ground plane, and EP-SW (pin 26) must be connected directly to SW nodes via short/wide traces or dedicated SW plane for optimal thermal resistance (θJA = 42.6°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| COMP | Error amplifier output | Connects to RC compensation network for loop stability tuning-enables custom bandwidth/phase margin design |
| FB | Feedback voltage sense | Monitors output via resistor divider; regulates VOUT to 0.6 V reference-supports adjustable outputs from 0.6 V to 90% of VIN |
| VREG | Internal 8 V regulator output | Powers internal control circuits; requires 1 µF ceramic bypass capacitor to GND for noise immunity and transient response |
| SW | Switch node | Drives external inductor; connects to BST capacitor and EP-SW thermal pad-critical for minimizing switching losses and EMI |
| PGND | Power ground return | Low-side MOSFET source return path; separate from analog GND to avoid noise coupling into control circuitry |
| BST | Bootstrap supply | Provides gate drive voltage for high-side MOSFET; requires 0.1 µF ceramic capacitor between BST and SW |
| PVIN | Main power input | Accepts 4.5–20 V input; multiple pins (16–19) reduce trace resistance and improve current handling |
| EN | Precision enable | 1.28 V typical turn-on threshold with 100 mV hysteresis-supports accurate UVLO programming or auto-start when tied to PVIN |
| PGOOD | Open-drain power-good | Indicates VOUT within ±5% regulation window after deglitch timing (1024 clocks); requires external pull-up resistor (10–100 kΩ) |
| RT | Frequency set | Resistor-to-GND sets fSW; 100 kΩ yields 600 kHz-enables EMI spread-spectrum or noise-sensitive system coordination |
| SYNC | External clock sync | Accepts 200 kHz–1.4 MHz clock; forces 180° phase shift-essential for multi-rail interleaving in dense power systems |
| SS | Soft start control | Capacitor-to-GND extends ramp time; internal soft start = 1600 clock cycles (~2.7 ms at 600 kHz)-prevents inrush into precharged loads |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual-MOSFET power stage | Eliminates external high-side/low-side drivers and reduces BOM count by 4+ components versus controller-based solutions |
| External compensation | Enables full control over loop dynamics-supports wide range of inductors/capacitors and dynamic load requirements |
| 180° out-of-phase synchronization | Allows interleaved operation with identical ADP2384ACPZN-R7 units to halve input/output ripple and reduce filter size |
| Startup into precharged output | Prevents reverse inductor current during hot-swap or brownout recovery-protects downstream capacitors and avoids system reset |
| ADIsimPower design tool support | Generates complete bill-of-materials, loop compensation, thermal analysis, and efficiency plots directly from user specifications |
Applications
| Communications Infrastructure | Industrial PLC Power Rails |
|---|---|
Use Scenario: Point-of-load conversion from 12 V backplane to 3.3 V/1.8 V for FPGA I/O banks and SerDes transceivers in 5G baseband units. IC Role / Device Role / Timing Role: Primary intermediate buck regulator delivering tightly regulated, low-noise power with fast transient response to handle burst-mode data traffic. Use Value: 92% peak efficiency at 3.3 V/4 A and 180° sync capability enable compact, thermally efficient designs meeting NEBS Level 3 thermal limits. | Use Scenario: Generating isolated 5 V and 3.3 V rails from 24 V DC field supply in programmable logic controller (PLC) CPU modules. IC Role / Device Role / Timing Role: High-reliability, wide-input buck converter providing stable core logic power under fluctuating industrial voltage conditions. Use Value: UVLO (4.5 V rising), thermal shutdown (150°C), and -40°C to +125°C junction rating ensure uninterrupted operation in harsh factory environments. |
| Healthcare Imaging Systems | Networking Switch ASIC Supplies |
Use Scenario: Powering low-noise analog front-end (AFE) and ADC sections in portable ultrasound devices requiring clean 1.2 V and 2.5 V supplies. IC Role / Device Role / Timing Role: Precision-regulated buck converter with <1% FB tolerance and external compensation for ultra-low output ripple (<10 mVpp). Use Value: Programmable soft start and PGOOD sequencing simplify compliance with IEC 60601-1 power-up safety requirements. | Use Scenario: Supplying 0.85 V core voltage to high-performance Ethernet switch ASICs with rapid load steps up to 3 A/ns. IC Role / Device Role / Timing Role: High-bandwidth, current-mode buck regulator delivering fast transient response (<50 µs settling) to maintain voltage within ±3% during burst traffic. Use Value: Peak current limit (6.1 A typ) and hiccup-mode OCP prevent damage during ASIC short-circuit faults while maintaining system uptime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54340DDAR | 4.5–36 V input, 3.5 A max, integrated FETs, 100 kHz–2.5 MHz fSW, no BST pin-uses internal boot diode | Higher VIN range but lower current rating; lacks 180° sync and precharged-start capability | Preferred where input exceeds 20 V or board space permits larger SO-8 package; not drop-in for ADP2384ACPZN-R7 layouts |
| MP2384DJ-LF-Z | 4.5–20 V input, 4 A, similar LFCSP-24 package, 300 kHz–2.2 MHz fSW, but only 0.8 V FB reference and no VREG pin | Lower FB reference increases output-setting error at low voltages; no internal bias rail limits external circuit options | Suitable for cost-sensitive industrial apps where 0.8 V FB and absence of VREG are acceptable trade-offs |
Compared with TPS54340DDAR and MP2384DJ-LF-Z, the ADP2384ACPZN-R7 offers superior thermal performance via dual-exposed pads, precision 0.6 V reference for sub-1.0 V outputs, and robust feature set including precharged-start and 180° sync-making it optimal for high-density, high-reliability power systems.
Availability
ADP2384ACPZN-R7 is available at Aetrix Electronics and suitable for communications infrastructure, industrial PLC power rails, and healthcare imaging systems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for ADP2384ACPZN-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, serving precision instrumentation, industrial automation, and communications markets.
The ADP2384ACPZN-R7 belongs to Analog Devices' high-efficiency power management portfolio, designed specifically for intermediate bus conversion in space-constrained, thermally demanding applications where reliability and design flexibility are critical.
FAQ
What is the recommended input capacitor for ADP2384ACPZN-R7?
The ADP2384ACPZN-R7 requires a low-ESR ceramic input capacitor (10 µF to 47 µF) placed as close as possible to the PVIN pins, rated above the maximum input voltage. The capacitor must handle RMS current calculated as IOUT × √[D(1−D)], where D = VOUT/VIN. For 12 VIN/3.3 VOUT/4 A operation, D ≈ 0.275 and ICIN_RMS ≈ 1.9 A-so a 25 V, X7R, 22 µF capacitor with ≥2.5 A RMS rating is appropriate. The ADP2384ACPZN-R7 datasheet specifies this requirement in Section "Input Capacitor Selection".
Does ADP2384ACPZN-R7 support synchronization with an external clock?
Yes, ADP2384ACPZN-R7 supports full synchronization to an external clock applied to the SYNC pin across 200 kHz to 1.4 MHz. During sync mode, the internal oscillator must be programmed via the RT resistor to run within ±10% of the external clock frequency, and the switching waveform aligns with 180° phase offset-enabling interleaved operation with other ADP2384ACPZN-R7 units. This capability is documented in the "Synchronization" section of the ADP2384ACPZN-R7 datasheet.
Can ADP2384ACPZN-R7 start up into a precharged output?
Yes, ADP2384ACPZN-R7 explicitly supports startup into a precharged output. Its control logic detects reverse inductor current during initial soft start and disables the low-side MOSFET to prevent discharging the output capacitor. This function remains active until the soft start voltage exceeds the FB pin voltage. The feature is confirmed in the "General Description" and "Soft Start" sections of the ADP2384ACPZN-R7 datasheet and validated in Figure 18 ("Voltage Precharged Output").
What is the thermal resistance of ADP2384ACPZN-R7 in its LFCSP package?
The ADP2384ACPZN-R7 in its 24-lead LFCSP_WQ package has θJA = 42.6°C/W and θJC = 6.8°C/W (to SW pad) or 2.3°C/W (to GND pad), measured on a 4-layer JEDEC-standard PCB. These values assume proper soldering of both exposed pads (EP-GND and EP-SW) to large copper planes. Thermal performance degrades significantly if either pad is left unconnected-the ADP2384ACPZN-R7 datasheet emphasizes this in "Thermal Resistance" (Table 3) and "Pin Configuration" (Figure 3 notes).
How is the output voltage set on ADP2384ACPZN-R7?
The output voltage of ADP2384ACPZN-R7 is set using an external resistor divider from VOUT to GND, connected to the FB pin. With a precise 0.6 V ±1% internal reference, VOUT = 0.6 V × (1 + RTOP/RBOT). For example, 3.3 V output uses RTOP = 45.3 kΩ and RBOT = 10 kΩ. The ADP2384ACPZN-R7 datasheet specifies this in "Output Voltage Setting" (Section 15) and provides design examples in "Design Example" (Section 19).
ADP2384ACPZN-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-WFQFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 20V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 18V
- Current - Output:
- 4A
- Frequency - Switching:
- 200kHz ~ 1.4MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-LFCSP (4x4)
ADP2384ACPZN-R7 FAQ
1.How can I place an order for ADP2384ACPZN-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP2384ACPZN-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 ADP2384ACPZN-R7 reliable?
The price and inventory of ADP2384ACPZN-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP2384ACPZN-R7 is usually 5 days.
3.What payment methods are accepted for ADP2384ACPZN-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP2384ACPZN-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP2384ACPZN-R7?
ADP2384ACPZN-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP2384ACPZN-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 ADP2384ACPZN-R7?
For technical support, including ADP2384ACPZN-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP2384ACPZN-R7 requirements.
6.How does Aetrix verify that ADP2384ACPZN-R7 is sourced from the original manufacturer or authorized distributors?
All ADP2384ACPZN-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 ADP2384ACPZN-R7 meets industry standards.
7.What is the process for return or replacement of ADP2384ACPZN-R7?
All ADP2384ACPZN-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP2384ACPZN-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 ADP2384ACPZN-R7 part is unused and in its original packaging.
Return procedure for ADP2384ACPZN-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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