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Analog Devices Inc./Maxim Integrated MAX727CCK-SL
- Part No.:
- MAX727CCK-SL
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- TO-220-5
- Datasheet:
-
MAX727CCK-SL.pdf
- Description:
- IC REG BUCK 5V 2A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:600
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Product details
Overview
MAX727CCK-SL from Maxim Integrated is a monolithic, bipolar, PWM step-down DC-DC regulator with 5V fixed output, 2A on-chip power switch, 100kHz switching frequency, 8V–40V input range, and TO-220-5 package. It delivers high-current voltage conversion in industrial power supplies and distributed bus systems where compact, self-contained buck regulation is required.
For engineers reviewing the MAX727CCK-SL datasheet, MAX727CCK-SL pinout, MAX727CCK-SL application, or MAX727CCK-SL equivalent, key selection considerations include its fixed 5V output, internal current limit of 2.6A, thermal performance in TO-220, cycle-by-cycle overcurrent protection, and compatibility with standard buck external components (100µH inductor, 470µF output cap, MBR745 Schottky).
Technical Context
The MAX727CCK-SL implements a classic synchronous-buck topology using an integrated bipolar power switch and on-chip oscillator. Its error amplifier drives the VC pin to regulate output via SENSE feedback, with built-in cycle-by-cycle current limiting triggered by SENSE voltage drop during overload or short-circuit events.
It operates across –40°C to +85°C (E-grade) or 0°C to +70°C (C-grade); MAX727CCK-SL is the C-grade variant. The device features 8.5mA quiescent current, 90% typical efficiency at full load, and supports external synchronization via VC pin (115–170kHz TTL clock), though its internal oscillator is factory-set to 100kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5V ±2% over full temperature and line/load range - eliminates need for external resistor divider. |
| Input Voltage Range | 8V to 40V - supports wide industrial and automotive battery-derived rails without pre-regulation. |
| Switch Current Limit | 2.6A typical - provides robust short-circuit protection while sustaining 2A continuous output. |
| Switching Frequency | 100kHz fixed - enables use of low-cost, low-ESR electrolytic output capacitors and standard ferrite inductors. |
| Quiescent Current | 8.5mA at VIN = 25V - minimizes no-load power loss in always-on systems. |
| Thermal Resistance θJC | 4.0°C/W - allows >2A operation with minimal heatsink in TO-220 package at ambient ≤50°C. |
| Duty Cycle Max | 90% - ensures regulation down to VIN ≈ 5.6V (5V/0.9), supporting brownout tolerance. |
Pinout & Package
MAX727CCK-SL is housed in a 5-pin TO-220 package with staggered leads; case is internally connected to GND. Standard lead form is staggered; straight leads available per factory request.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input power supply and switch collector node | Must be bypassed with ≥220µF low-ESR capacitor; connects directly to high-side switch collector. |
| VSW | Switch output (emitter of internal NPN) | Swings up to 35V below GND; drives external inductor; requires low-inductance PCB routing. |
| GND | Power and signal reference ground | Internal reference tied to this pin; must have short, low-noise connection to minimize load regulation error. |
| VC | Error amplifier output and sync input | Compensation node (RC network required); also accepts external 115–170kHz TTL clock for synchronization. |
| SENSE | Feedback and current-limit sense input | Directly connected to VOUT; sets output voltage and reduces switching frequency during low-VOUT faults. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 2A bipolar power switch | Eliminates external MOSFET and driver, reducing BOM count and layout complexity in high-current buck designs. |
| Cycle-by-cycle current limiting | Prevents thermal runaway during output shorts or startup into heavy capacitive loads without external sensing. |
| Fixed 100kHz oscillator | Enables predictable EMI profile and simplifies filter design versus variable-frequency controllers. |
| Low 8.5mA quiescent current | Supports energy-sensitive applications such as battery-backed industrial controllers with standby mode. |
| TO-220 thermal performance (θJC = 4.0°C/W) | Permits full 2A output with modest heatsinking-no forced air or complex thermal vias required. |
Applications
| Industrial Distributed Power | High-Voltage Bus Converter |
|---|---|
|
Use Scenario: Converting 24V or 36V factory bus to local 5V logic rail for PLC I/O modules. IC Role / Device Role / Timing Role: Primary step-down regulator delivering regulated 5V/2A with fast transient response to digital load steps. Use Value: Internal current limiting and thermal robustness enable reliable operation in unventilated enclosures with ambient up to 70°C. |
Use Scenario: Down-converting 40V telecom battery backup to 5V for Ethernet switch control circuitry. IC Role / Device Role / Timing Role: High-input-voltage buck converter handling wide VIN range and maintaining regulation during brownouts. Use Value: 8V minimum start-up voltage and 90% max duty cycle ensure stable 5V output even when input sags to 5.6V. |
| Multiple-Output Buck System | Legacy Equipment Replacement |
|
Use Scenario: Serving as main 5V rail in multi-output power supply alongside MAX728 (3.3V) and MAX729 (3V) regulators. IC Role / Device Role / Timing Role: One of three pin-compatible, functionally identical regulators differing only in internal feedback setting. Use Value: Identical pinout, package, and external component requirements simplify board design and reduce inventory SKUs. |
Use Scenario: Replacing failed MAX727CCK in field-deployed medical analyzers requiring long-term component continuity. IC Role / Device Role / Timing Role: Drop-in functional replacement for legacy 5V/2A buck regulation with identical electrical behavior and thermal footprint. Use Value: Same TO-220-5 mechanical interface and matching SENSE/VC compensation network allow zero-layout change replacement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX727ECK | Same functionality and pinout; rated for –40°C to +85°C junction temperature vs. 0°C to +70°C for MAX727CCK-SL. | Suitable for extended-temperature industrial or outdoor deployments where ambient exceeds 70°C. | Select MAX727ECK if operating temperature range must exceed 70°C ambient or require wider storage specification. |
| LM2596T-5.0 | CMOS-based, 3A-rated, adjustable or fixed 5V version; 150kHz switching; requires external diode and different compensation. | Higher peak current capability but lacks integrated bipolar switch robustness under short-circuit stress. | Choose LM2596T-5.0 only if higher output current margin is critical and thermal derating under fault conditions is managed externally. |
Compared with MAX727ECK and LM2596T-5.0, the MAX727CCK-SL offers optimal balance of thermal reliability in standard industrial environments, proven bipolar switch ruggedness, and minimal external component count - making it preferred for cost-sensitive, volume-manufactured 5V/2A systems where extended temperature is not required.
Availability
MAX727CCK-SL is available at Aetrix Electronics and suitable for industrial power supplies, distributed bus converters, and legacy equipment repair requiring stable component supply and long-lifecycle support.
Supply support for MAX727CCK-SL 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
Maxim Integrated (now part of Analog Devices) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing markets.
The MAX727CCK-SL belongs to Maxim's legacy high-voltage buck regulator family designed for rugged, low-component-count DC-DC conversion in harsh environments where reliability and thermal stability outweigh ultra-high efficiency demands.
FAQ
What is the operating temperature range of the MAX727CCK-SL?
The MAX727CCK-SL is specified for 0°C to +70°C ambient operating temperature, with a junction temperature range of 0°C to +125°C. This C-grade variant is intended for commercial and standard industrial environments-not extended-temperature applications. For wider thermal operation, consider the MAX727ECK variant instead of the MAX727CCK-SL.
Does the MAX727CCK-SL require external compensation components?
Yes, the MAX727CCK-SL requires an external RC network connected to the VC pin for loop stability. A typical configuration uses a 2.7kΩ resistor and 0.01µF capacitor, as shown in the datasheet's typical operating circuit. Omitting or mis-sizing these components risks instability, overshoot, or oscillation under dynamic load changes - proper compensation is essential for reliable regulation of the MAX727CCK-SL.
Can the MAX727CCK-SL be synchronized to an external clock?
Yes, the MAX727CCK-SL supports external synchronization via its VC pin, accepting TTL-level clocks between 115kHz and 170kHz. When synchronized, the internal 100kHz oscillator is disabled. This feature enables EMI reduction in noise-sensitive systems and timing coordination across multiple MAX727CCK-SL devices - but requires careful impedance matching and noise filtering on the VC line.
Is the MAX727CCK-SL still recommended for new designs?
No - Maxim explicitly states the MAX727CCK-SL is "Not Recommended for New Designs" due to discontinuation of its wafer fabrication process. It remains available for existing designs and legacy repair, but new projects should evaluate modern alternatives like the MAX2000x series or industry-second sources. Aetrix Electronics supports continuity supply of the MAX727CCK-SL for ongoing production needs.
What is the absolute maximum input voltage rating for the MAX727CCK-SL?
The absolute maximum input voltage for the MAX727CCK-SL is 45V, as specified in the Absolute Maximum Ratings table. However, the recommended operating range is 8V to 40V. Exceeding 40V may cause premature degradation or failure, especially under thermal stress. Designers must ensure transient spikes on the VIN line - including inductive kickback - remain below 45V to maintain reliability of the MAX727CCK-SL.
MAX727CCK-SL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-220-5
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 8V
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 2A
- Frequency - Switching:
- 100kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-5
MAX727CCK-SL FAQ
1.How can I place an order for MAX727CCK-SL through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX727CCK-SL 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 MAX727CCK-SL reliable?
The price and inventory of MAX727CCK-SL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX727CCK-SL is usually 5 days.
3.What payment methods are accepted for MAX727CCK-SL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX727CCK-SL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX727CCK-SL?
MAX727CCK-SL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX727CCK-SL 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 MAX727CCK-SL?
For technical support, including MAX727CCK-SL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX727CCK-SL requirements.
6.How does Aetrix verify that MAX727CCK-SL is sourced from the original manufacturer or authorized distributors?
All MAX727CCK-SL 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 MAX727CCK-SL meets industry standards.
7.What is the process for return or replacement of MAX727CCK-SL?
All MAX727CCK-SL units undergo pre-shipment inspection (PSI). If there is an issue with MAX727CCK-SL, 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 MAX727CCK-SL part is unused and in its original packaging.
Return procedure for MAX727CCK-SL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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