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Analog Devices Inc. ADP2441ACPZ-R7
- Part No.:
- ADP2441ACPZ-R7
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-WFQFN Exposed Pad, CSP
- Datasheet:
-
ADP2441ACPZ-R7.pdf
- Description:
- IC REG BUCK ADJ 1A 12LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,709
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Product details
Overview
ADP2441ACPZ-R7 from Analog Devices is a synchronous step-down DC-DC regulator delivering up to 1 A output current with input voltage range 4.5 V to 36 V, adjustable switching frequency (300 kHz–1 MHz), ±1% output voltage accuracy, and integrated high-side/low-side N-channel MOSFETs. It serves as a primary point-of-load power converter in industrial control supplies and distributed power systems requiring high step-down ratios.
For engineers reviewing the ADP2441ACPZ-R7 datasheet, ADP2441ACPZ-R7 pinout, ADP2441ACPZ-R7 application, or ADP2441ACPZ-R7 equivalent, key selection criteria include its 50 ns minimum on-time for high VIN/VOUT ratios, hiccup-mode overcurrent protection, precision enable threshold (1.20 V typ), and open-drain PGOOD signaling with 50 µs delay.
Technical Context
The ADP2441ACPZ-R7 implements emulated peak current mode control with internal slope compensation automatically adjusted for input/output voltage and switching frequency-enabling stable operation at duty cycles ≥50%. Its control loop integrates an error amplifier (250 µA/V transconductance, 65 dB open-loop gain) and a PWM comparator comparing COMP voltage against an emulated ramp plus sensed valley inductor current.
It operates in two distinct modes: fixed-frequency PWM under medium-to-heavy loads (reducing EMI), and pulse-skip mode at light loads (improving efficiency by gating switching pulses). Protection architecture includes UVLO (4.0 V threshold, 200 mV hysteresis), thermal shutdown (150°C trip), and cycle-by-cycle hiccup-mode current limiting (1.6 A typical peak limit, 8 cumulative events before hiccup).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 36 V - supports wide industrial rails including 24 V, 12 V, and legacy 36 V systems without external pre-regulation. |
| Max Output Current | 1 A continuous - sufficient for FPGA I/O banks, microcontroller cores, and isolated gate drivers in compact PCB layouts. |
| Output Voltage Accuracy | ±1% over −40°C to +125°C - ensures reliable regulation for precision analog circuitry and ADC reference supplies. |
| Switching Frequency | 300 kHz to 1 MHz (resistor-programmable) - enables trade-off between EMI filtering size and efficiency; 700 kHz typical for balanced performance. |
| Min On-Time | 50 ns - allows direct conversion from 24 V input to 3.3 V or 1.2 V outputs without intermediate stages. |
| Efficiency | Up to 94% at 1 A - achieved via integrated 270 mΩ high-side and 180 mΩ low-side MOSFETs minimizing conduction loss. |
| PGOOD Delay | 50 µs - provides deterministic power sequencing timing for downstream logic and processors. |
Pinout & Package
ADP2441ACPZ-R7 is housed in a thermally enhanced 3 mm × 3 mm, 12-lead LFCSP package with exposed thermal pad connected to both AGND and PGND for optimal heat dissipation and noise isolation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB | Feedback Input | Senses output voltage via resistor divider; regulates to precise 0.6 V reference (±1%) across temperature. |
| COMP | Error Amplifier Output | Provides compensation node for external RC network to stabilize control loop across load/line variations. |
| EN | Precision Enable | Logic-level shutdown with 1.20 V rising threshold (±5%); draws <1 µA leakage when disabled. |
| PGOOD | Open-Drain Power-Good | Asserts high when VOUT is within ±11% of target; 50 µs delay ensures valid regulation before system release. |
| FREQ | Frequency Set | Resistor-to-AGND sets switching frequency; internal 1.2 V bias enables accurate current-source-based programming. |
| SS/TRK | Soft Start / Tracking | Capacitor-to-ground controls startup ramp time; resistive divider enables output tracking of external voltage rails. |
| PGND | Power Ground | High-current return path for MOSFET switches; must be tied directly to exposed thermal pad and input capacitor. |
| SW | Switch Node | Connection point between high-side and low-side MOSFETs; requires tight layout to minimize EMI and ringing. |
| VIN | Main Input Supply | Accepts 4.5–36 V; bypassed with ceramic capacitor directly to PGND for low-impedance high-frequency decoupling. |
| BST | Bootstrap Supply | Forms floating gate drive for high-side MOSFET via 10 nF capacitor to SW; critical for proper high-side turn-on. |
| VCC | Internal LDO Output | 5.25 V regulated supply for control circuitry; powered only when EN > 0.7 V; requires dual 1 µF caps to AGND/PGND. |
| AGND | Analog Ground | Reference for feedback, error amp, and internal references; must be tied to exposed pad but kept separate from noisy PGND paths. |
Key Features
| Feature | Design Value |
|---|---|
| Pulse Skip Mode | Reduces light-load switching losses by dynamically gating PWM pulses-maintains >85% efficiency at 10 mA output. |
| Adjustable Soft Start | External capacitor on SS/TRK pin programs monotonic output ramp time-prevents inrush current into large output capacitors. |
| Tracking Capability | SS/TRK pin accepts resistive divider from master rail to coordinate startup/shutdown sequencing with other regulators. |
| Hiccup-Mode OCP | Enters burst-mode shutdown after 8 consecutive current-limit events-limits power dissipation during sustained short-circuit faults. |
| Low Minimum On-Time | 50 ns enables single-stage conversion from 36 V input to 1.2 V output (30:1 ratio) without compromising stability. |
| Integrated Power MOSFETs | Eliminates external high-side/low-side switch components-reduces BOM count, layout area, and gate-drive complexity. |
Applications
| Industrial PLC I/O Modules | Automotive Body Control Units |
|---|---|
Use Scenario: Powering isolated CAN transceivers, analog sensor front-ends, and digital I/O buffers in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Primary 5 V or 3.3 V point-of-load regulator sourcing up to 1 A from 24 V field bus. Use Value: 36 V max input withstands load-dump transients; ±1% accuracy ensures stable ADC reference and logic thresholds. |
Use Scenario: Generating 5 V for microcontrollers and 3.3 V for infotainment SoCs in body electronics modules. IC Role / Device Role / Timing Role: Secondary buck regulator fed from vehicle battery (9–16 V nominal, up to 36 V during cranking). Use Value: 50 ns min on-time supports direct 12 V → 3.3 V conversion; hiccup OCP prevents thermal runaway during wiring faults. |
| Distributed Telecom Power | Programmable Logic Controllers |
Use Scenario: Local regulation of 12 V backplane supplies to generate 5 V/3.3 V for FPGA configuration and memory interfaces. IC Role / Device Role / Timing Role: High-efficiency, low-noise POL converter placed near FPGA power pins. Use Value: Adjustable 300 kHz–1 MHz switching frequency avoids sensitive RF bands; PGOOD enables FPGA configuration lockstep. |
Use Scenario: Providing clean 5 V for real-time Ethernet PHYs and 3.3 V for ARM Cortex-M7 cores in modular I/O chassis. IC Role / Device Role / Timing Role: Main system regulator with precision enable for controlled power-up sequencing. Use Value: Precision EN threshold (1.20 V) allows direct interface with FPGA I/O banks; tracking supports multi-rail synchronization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADP2442ACPZ-R7 | Includes synchronization input (SYNC) for phase-aligned multi-phase operation; otherwise identical pinout, specs, and package. | Required where multiple ADP244x regulators must operate with synchronized switching to reduce input ripple current. | Select ADP2442ACPZ-R7 only if clock synchronization is needed; ADP2441ACPZ-R7 is preferred for standalone single-rail designs. |
| LM5164QWRXMRQ1 | Automotive-grade (AEC-Q100), wider temp range (−40°C to +150°C), higher max input (100 V), but lower max output current (0.6 A). | Suitable for automotive under-hood applications requiring extended temperature and fault coverage beyond ADP2441ACPZ-R7's industrial rating. | Choose LM5164QWRXMRQ1 for automotive environments; ADP2441ACPZ-R7 remains optimal for cost-sensitive industrial and telecom use cases. |
Compared with ADP2442ACPZ-R7, ADP2441ACPZ-R7 omits SYNC functionality-reducing system complexity and cost where phase alignment is unnecessary. Versus LM5164QWRXMRQ1, ADP2441ACPZ-R7 delivers higher output current (1 A vs. 0.6 A) and tighter output accuracy (±1% vs. ±1.5%), making it better suited for precision industrial power rails.
Availability
ADP2441ACPZ-R7 is available at Aetrix Electronics and suitable for industrial control supplies, distributed power systems, and point-of-load applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ADP2441ACPZ-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 design and manufacturing operations worldwide.
The ADP2441ACPZ-R7 belongs to Analog Devices' ADP244x family of high-voltage synchronous buck regulators, engineered for industrial and telecom point-of-load conversion where wide input range, high efficiency, and robust protection are essential.
FAQ
What is the maximum input voltage rating for ADP2441ACPZ-R7?
The ADP2441ACPZ-R7 has an absolute maximum input voltage rating of +40 V relative to PGND, but its specified operational input range is 4.5 V to 36 V. Operation above 36 V may cause undefined behavior or reduced reliability, and the UVLO circuit disables the device below 3.8 V (typical) to prevent unstable startup.
How does the ADP2441ACPZ-R7 achieve high efficiency at light loads?
The ADP2441ACPZ-R7 enters pulse skip mode at light loads, where it skips switching cycles while maintaining output regulation-reducing switching losses and achieving >85% efficiency even at 10 mA output. This mode is automatically engaged when the COMP voltage falls below the internal 1 V threshold, and resumes fixed-frequency PWM as load increases.
Can ADP2441ACPZ-R7 be used for output voltages below 1 V?
Yes-the ADP2441ACPZ-R7 supports output voltages down to 0.6 V with ±1% accuracy across temperature, enabled by its precision 0.6 V internal reference and high-gain error amplifier. For sub-1 V outputs, ensure FB resistor divider uses low-tolerance (≤0.5%) components and minimize PCB trace resistance to maintain regulation accuracy.
What is the purpose of the BST pin on ADP2441ACPZ-R7?
The BST (bootstrap) pin on ADP2441ACPZ-R7 provides the floating gate drive voltage for the high-side N-channel MOSFET. A 10 nF ceramic capacitor must be placed between BST and SW to form a charge pump that elevates the gate voltage above VIN-ensuring full enhancement of the high-side switch and minimizing RDS(on) conduction loss.
Does ADP2441ACPZ-R7 support power supply sequencing with other regulators?
Yes-via the SS/TRK pin, ADP2441ACPZ-R7 supports both soft-start ramp control (using a capacitor to ground) and voltage tracking (using a resistive divider from a master rail). This enables coordinated startup/shutdown with other power rails, preventing latch-up or reverse-bias conditions in complex multi-supply systems.
ADP2441ACPZ-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)
ADP2441ACPZ-R7 FAQ
1.How can I place an order for ADP2441ACPZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP2441ACPZ-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 ADP2441ACPZ-R7 reliable?
The price and inventory of ADP2441ACPZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP2441ACPZ-R7 is usually 5 days.
3.What payment methods are accepted for ADP2441ACPZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP2441ACPZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP2441ACPZ-R7?
ADP2441ACPZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP2441ACPZ-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 ADP2441ACPZ-R7?
For technical support, including ADP2441ACPZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP2441ACPZ-R7 requirements.
6.How does Aetrix verify that ADP2441ACPZ-R7 is sourced from the original manufacturer or authorized distributors?
All ADP2441ACPZ-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 ADP2441ACPZ-R7 meets industry standards.
7.What is the process for return or replacement of ADP2441ACPZ-R7?
All ADP2441ACPZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP2441ACPZ-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 ADP2441ACPZ-R7 part is unused and in its original packaging.
Return procedure for ADP2441ACPZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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