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Analog Devices Inc. ADP2442ACPZ-R7
- Part No.:
- ADP2442ACPZ-R7
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-WFQFN Exposed Pad, CSP
- Datasheet:
-
ADP2442ACPZ-R7.pdf
- Description:
- IC REG BUCK ADJ 1A 12LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:5,460
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Product details
Overview
ADP2442ACPZ-R7 from Analog Devices is a synchronous step-down DC-to-DC regulator supporting 4.5 V to 36 V input, delivering up to 1 A output current with ±1% voltage accuracy and adjustable output down to 0.6 V. It features external clock synchronization (300 kHz–1 MHz), pulse-skip or forced PWM mode, and integrated high- and low-side N-channel MOSFETs - used in industrial power rails, point-of-load conversion, and distributed systems requiring robust input range and thermal resilience.
For engineers reviewing the ADP2442ACPZ-R7 datasheet, ADP2442ACPZ-R7 pinout, ADP2442ACPZ-R7 application, or ADP2442ACPZ-R7 equivalent, key selection criteria include its 50 ns minimum on-time for high step-down ratios, 12-lead LFCSP package with exposed pad thermal management, hiccup-mode overcurrent protection, precision enable threshold (1.20 V typ), and PGOOD open-drain signaling with 50 µs delay.
Technical Context
The ADP2442ACPZ-R7 employs emulated peak current-mode control with internal slope compensation automatically adjusted for input/output voltage and switching frequency - enabling stable operation up to ~83% duty cycle without external ramp injection. Its dual-mode operation (forced PWM or pulse-skip) is selected via the SYNC/MODE pin, directly influencing light-load efficiency and EMI profile.
It integrates an internal 5 V LDO (VCC) powered from VIN, supplies gate drive for both MOSFETs via BST-SW bootstrap circuitry, and uses a dedicated analog ground (AGND) separate from power ground (PGND) to isolate noise-sensitive feedback and compensation paths - critical for maintaining ±1% output regulation across −40°C to +125°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 36 V - supports wide industrial input sources including 24 V, 12 V, and unregulated 36 V rails without pre-regulation. |
| Max Output Current | 1 A continuous - sufficient for FPGA I/O banks, microcontroller cores, and sensor signal chains in compact PCB layouts. |
| Output Voltage Accuracy | ±1% over −40°C to +125°C - ensures stable reference for ADCs, DACs, and precision analog circuitry without recalibration. |
| Switching Frequency | Adjustable 300 kHz to 1 MHz via resistor or external sync clock - enables EMI optimization and inductor size trade-offs (e.g., 1 MHz allows <2.2 µH inductors). |
| Min On/Off Time | 50 ns / 165 ns - permits high step-down ratios (e.g., 24 V → 1.2 V at 1 MHz) while maintaining controllable duty cycle and stability. |
| Thermal Shutdown | 150°C with 25°C hysteresis - protects against sustained overload or poor heatsinking in sealed enclosures or high ambient environments. |
| Shutdown Current | <15 µA - enables ultra-low-power system sleep states without compromising fast wake-up capability. |
Pinout & Package
ADP2442ACPZ-R7 is housed in a thermally enhanced 3 mm × 3 mm, 12-lead LFCSP package with exposed pad (EP) connected to both AGND and PGND planes for optimal thermal dissipation (θJA = 40°C/W, θJC = 2.4°C/W). The exposed pad must be soldered to a multi-layer PCB's internal ground planes to meet junction temperature limits under full load.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB | Feedback Input | Senses output voltage via resistor divider; regulates to 0.6 V reference - sets output as VOUT = 0.6 V × (1 + RTOP/RBOTTOM). |
| COMP | Error Amplifier Compensation | Connects external RC network to stabilize loop response; critical for phase margin >55° across line/load/temp variations. |
| EN | Precision Enable | Logic-level shutdown input with 1.20 V typical rising threshold - enables sequencing control and system-level power management. |
| PGOOD | Open-Drain Power-Good Output | Asserts high when VOUT is within ±11% of target (89–118% window); 50 µs delay ensures valid regulation before system release. |
| FREQ | Frequency Set Input | Resistor-to-AGND sets fSW (300–1000 kHz); tolerance impacts timing accuracy - e.g., 308 kΩ yields 300 kHz ±10%. |
| SYNC/MODE | Sync Clock Input / Mode Select | Accepts external clock (300–1000 kHz) or selects mode: tied to AGND = pulse-skip, to VCC = forced PWM. |
| PGND | Power Ground | Low-impedance return path for high-current switch node (SW); must connect directly to exposed pad and bulk input capacitor. |
| SW | Switch Node | Drain of low-side MOSFET / source of high-side MOSFET - carries high di/dt; requires tight layout to minimize EMI and shoot-through risk. |
| VIN | Main Input Supply | 4.5–36 V input; bypassed with ceramic capacitor near PGND - feeds internal LDO and power stage. |
| BST | Bootstrap Supply | Connects 10 nF capacitor to SW to generate floating gate drive for high-side N-MOSFET - essential for 100% duty-cycle capable operation. |
| VCC | Internal LDO Output | 5.0–5.5 V regulated supply for controller logic; decoupled with 1 µF to both AGND and PGND - powers gate drivers and bias circuits. |
| AGND | Analog Ground | Reference for FB, COMP, EN, PGOOD - must be star-connected to exposed pad but isolated from noisy PGND traces to preserve regulation accuracy. |
Key Features
| Feature | Design Value |
|---|---|
| Wide Input Range (4.5–36 V) | Enables single-supply compatibility across 12 V, 24 V, and 36 V industrial buses without external pre-regulators. |
| External Clock Synchronization | Eliminates beat frequencies in multi-rail systems by locking switching to master clock - reduces conducted EMI peaks. |
| Hiccup-Mode Overcurrent Protection | Enters 6 ms off-cycle after 8 current-limit events - prevents thermal runaway during sustained short-circuit without latch-off. |
| Adjustable Soft Start (2 ms typical) | Controls inrush current into large output capacitors - avoids input rail droop and prevents false PGOOD assertion. |
| Separate AGND and PGND Pins | Reduces noise coupling from power-switching transients into feedback and error amplifier - maintains ±1% regulation accuracy. |
| Integrated High- and Low-Side MOSFETs | Eliminates external discrete FETs and drivers - reduces BOM count, layout area, and gate-drive loop inductance. |
Applications
| Industrial Control Power Supply | Point-of-Load Regulation for PLC Modules |
|---|---|
|
Use Scenario: Converting 24 V field bus to 5 V/3.3 V for digital I/O modules, analog sensor interfaces, and communication peripherals in programmable logic controllers. IC Role / Device Role / Timing Role: Primary buck regulator providing tightly regulated, low-noise local power with hiccup-mode fault containment. Use Value: Maintains ±1% output accuracy across −40°C to +85°C operating range and withstands 36 V transients per IEC 61000-4-5, ensuring reliable module uptime. |
Use Scenario: Generating 1.2 V core voltage for ARM Cortex-M7 microcontrollers in modular automation controllers with strict thermal constraints. IC Role / Device Role / Timing Role: High-efficiency synchronous buck converter with 50 ns min-on-time enabling 24 V → 1.2 V conversion at 1 MHz. Use Value: Achieves >90% efficiency at 500 mA load with forced PWM mode, reducing board-level heat density and eliminating need for heatsinks. |
| Distributed Power Architecture | Standard Rail Conversion (24 V/12 V/5 V) |
|
Use Scenario: Local regulation on remote I/O cards receiving 48 V backplane power, stepping down to 12 V for relay drivers and 3.3 V for CAN transceivers. IC Role / Device Role / Timing Role: Dual-output-capable regulator (via multiple instances) with external sync to eliminate inter-rail beat frequencies. Use Value: External clock synchronization ensures all local regulators switch coherently - simplifying EMI filter design and passing CISPR 32 Class B. |
Use Scenario: Replacing linear regulators in legacy equipment upgrading from 24 V/12 V to modern 5 V/3.3 V logic rails while retaining existing input connectors. IC Role / Device Role / Timing Role: Drop-in replacement buck solution with identical footprint to older non-synchronous parts, leveraging same input caps and inductors. Use Value: Delivers 94% peak efficiency vs. <40% for linear regulators - cutting power loss by >3 W per rail and enabling fanless enclosure designs. |
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 |
|---|---|---|---|
| ADP2441ACPZ-R7 | Lacks external clock synchronization; includes programmable soft start and tracking capability not present in ADP2442ACPZ-R7. | Better suited for power sequencing in multi-rail systems where tracking is required, but unsuitable where EMI-controlled sync is mandatory. | Select ADP2441ACPZ-R7 only if tracking or adjustable soft-start time is prioritized over sync capability. |
| LM61480RQWR | Texas Instruments part with 3.5–36 V input, 8 A output, and pin-compatible 12-pin QFN; higher current rating and different compensation architecture. | Designed for higher-power applications; requires re-optimization of compensation and inductor selection - not drop-in compatible. | Choose LM61480RQWR only when >1 A output is needed; otherwise, ADP2442ACPZ-R7 offers tighter voltage accuracy and superior light-load pulse-skip behavior. |
Compared with ADP2442ACPZ-R7, ADP2441ACPZ-R7 trades sync capability for enhanced sequencing features, while LM61480RQWR scales current capacity at the cost of design reuse - making ADP2442ACPZ-R7 optimal for EMI-sensitive, precision 1 A point-of-load applications.
Availability
ADP2442ACPZ-R7 is available at Aetrix Electronics and suitable for industrial control supplies, distributed power systems, and point-of-load applications requiring stable component supply, extended temperature support (−40°C to +125°C), and long-term manufacturing continuity.
Supply support for ADP2442ACPZ-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, with R&D and manufacturing operations worldwide.
The ADP2442ACPZ-R7 belongs to Analog Devices' ADP24xx family of high-voltage synchronous buck regulators, engineered specifically for industrial and automotive power systems demanding wide input range, precise regulation, and robust fault protection.
FAQ
What is the minimum recommended input voltage for stable operation of the ADP2442ACPZ-R7?
The ADP2442ACPZ-R7 has a guaranteed operational input range starting at 4.5 V, with undervoltage lockout (UVLO) releasing at 4.0 V (typical) and hysteresis of 200 mV. Below 4.5 V, performance parameters such as output accuracy, current limit, and switching frequency may deviate from datasheet specifications - so 4.5 V is the minimum recommended for full compliance across temperature and load conditions.
Can the ADP2442ACPZ-R7 operate without an external bootstrap capacitor?
No - the ADP2442ACPZ-R7 requires a 10 nF ceramic capacitor between BST and SW pins to generate the floating gate drive voltage for the high-side N-channel MOSFET. Omitting this capacitor prevents proper high-side switching, resulting in no output regulation or potential damage due to shoot-through. The capacitor must be placed as close as possible to the IC with minimal trace inductance.
How does the ADP2442ACPZ-R7 handle output short-circuit conditions?
The ADP2442ACPZ-R7 uses hiccup-mode overcurrent protection: upon detecting eight consecutive current-limit events, it disables switching for 6 ms, then attempts restart. This cycle repeats until the fault clears. Unlike latch-off protection, hiccup mode prevents thermal runaway while allowing automatic recovery - a key safety feature for inaccessible industrial installations where manual reset is impractical.
Is the ADP2442ACPZ-R7 pin-compatible with the ADP2441ACPZ-R7?
No - although both share the same 12-lead LFCSP package and many functional pins, the ADP2442ACPZ-R7 repurposes the SS (soft-start) pin of the ADP2441ACPZ-R7 as SYNC/MODE. This difference affects PCB layout, compensation network placement, and system-level timing control - making them functionally incompatible without hardware revision.
What is the maximum achievable output voltage accuracy of the ADP2442ACPZ-R7 over temperature?
The ADP2442ACPZ-R7 guarantees ±1% output voltage accuracy over the full junction temperature range of −40°C to +125°C, based on its 0.6 V internal reference with ±0.009 V total variation (0.591 V to 0.609 V). This accuracy holds under specified line, load, and temperature conditions - confirmed by production testing and reflected in the "Feedback Regulation Voltage" parameter in Table 1 of the Rev. B datasheet.
ADP2442ACPZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 12-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):
- 36V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 32.4V
- Current - Output:
- 1A
- Frequency - Switching:
- 300kHz ~ 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-LFCSP-WQ (3x3)
ADP2442ACPZ-R7 FAQ
1.How can I place an order for ADP2442ACPZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP2442ACPZ-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 ADP2442ACPZ-R7 reliable?
The price and inventory of ADP2442ACPZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP2442ACPZ-R7 is usually 5 days.
3.What payment methods are accepted for ADP2442ACPZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP2442ACPZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP2442ACPZ-R7?
ADP2442ACPZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP2442ACPZ-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 ADP2442ACPZ-R7?
For technical support, including ADP2442ACPZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP2442ACPZ-R7 requirements.
6.How does Aetrix verify that ADP2442ACPZ-R7 is sourced from the original manufacturer or authorized distributors?
All ADP2442ACPZ-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 ADP2442ACPZ-R7 meets industry standards.
7.What is the process for return or replacement of ADP2442ACPZ-R7?
All ADP2442ACPZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP2442ACPZ-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 ADP2442ACPZ-R7 part is unused and in its original packaging.
Return procedure for ADP2442ACPZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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