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Analog Devices Inc./Maxim Integrated MAX641AEPA+
- Part No.:
- MAX641AEPA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX641AEPA+.pdf
- Description:
- IC REG BOOST ADJ/1.31V 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,255
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Product details
Overview
MAX641AEPA+ from Maxim Integrated is a fixed-output, CMOS-based step-up switching regulator delivering up to 10W output power with 5V output voltage, 85% typical efficiency, and 100kHz switching frequency. It operates from a 1.5V to 12V input range and integrates an internal 1.5A MOSFET switch for compact DC-DC boost conversion in portable instrumentation.
For engineers reviewing the MAX641AEPA+ datasheet, MAX641AEPA+ pinout, MAX641AEPA+ application, or MAX641AEPA+ equivalent, key selection criteria include input voltage range compatibility, fixed 5V output tolerance (±4%), thermal performance in PDIP-8 package, and absence of external compensation requirements.
Technical Context
The MAX641AEPA+ implements a current-mode PWM control architecture with internal slope compensation to ensure stable operation across wide load and input variations. It features undervoltage lockout (UVLO) at 1.3V and thermal shutdown protection at +150°C.
Unlike adjustable variants (e.g., MAX642/643), the MAX641AEPA+ uses laser-trimmed internal feedback resistors to fix the output at 5.0V ±4%, eliminating external resistor networks and reducing BOM count for space-constrained designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±4% - eliminates need for external feedback resistors and simplifies layout. |
| Input Voltage Range | 1.5V to 12V - supports single-cell Li-ion, multi-cell alkaline, and industrial supply rails. |
| Switch Current Limit | 1.5A typical - enables ≥10W output power at 5V with appropriate inductor and diode selection. |
| Switching Frequency | 100kHz - balances efficiency and EMI; allows use of low-cost, high-saturation-current inductors. |
| Efficiency | 85% typical at 5V/1A - reduces thermal load in enclosed portable enclosures without forced airflow. |
| UVLO Threshold | 1.3V - prevents erratic startup during battery brownout and extends usable battery life. |
Pinout & Package
MAX641AEPA+ is housed in an 8-pin plastic DIP (PDIP-8) package with 0.3-inch width, through-hole mounting, and JEDEC MS-001 compliant footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Power Ground | Primary return path for switch current and control circuitry; requires low-impedance PCB plane connection. |
| 2 (OUT) | Switch Output | Drives external Schottky diode anode; carries pulsed 1.5A peak current at 100kHz. |
| 3 (FB) | Feedback Input | Internally connected to fixed 5V divider; no external components required. |
| 4 (COMP) | Compensation Node | Internally compensated; no external capacitor needed for stability. |
| 5 (SHDN) | Shutdown Control | Active-low logic input; pulls below 0.8V to disable regulator and reduce quiescent current to 10µA. |
| 6 (VCC) | Supply Input | Connects to input rail; powers internal logic and gate driver; bypass with 0.1µF ceramic capacitor. |
| 7 (LX) | Inductor Connection | Switch node connecting to inductor's ungrounded end; high dv/dt node requiring tight layout. |
| 8 (GND) | Power Ground | Second ground pin for enhanced thermal and noise performance; must connect to same plane as Pin 1. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 5V Output | Laser-trimmed internal feedback ensures ±4% accuracy over temperature and line/load, removing external resistor tolerance errors. |
| No External Compensation | Internal compensation network guarantees stability with standard 100kHz operation-no design iteration needed for loop response. |
| Thermal Shutdown | Activates at +150°C junction temperature and latches off until reset via SHDN pin or power cycle. |
| Low Quiescent Current | 10µA in shutdown mode extends battery life in always-on sensor nodes where duty cycling is critical. |
Applications
| Portable Medical Sensors | Industrial Data Loggers |
|---|---|
Use Scenario: Battery-powered glucose meters requiring stable 5V rail for ADC and microcontroller from single AA cell. IC Role / Device Role / Timing Role: Primary DC-DC boost converter generating regulated 5V output from 1.5V–3.2V input. Use Value: Enables full functionality down to 1.5V input while maintaining ±4% output accuracy and 85% efficiency. | Use Scenario: Remote environmental monitoring node powered by two alkaline cells (3V nominal) logging temperature/humidity hourly. IC Role / Device Role / Timing Role: Fixed-output boost regulator powering 5V MCU, flash memory, and RS-232 transceiver. Use Value: Delivers 10W capability and UVLO at 1.3V to maximize usable battery capacity before shutdown. |
| Handheld Test Equipment | Smart Utility Meters |
Use Scenario: Pocket-sized multimeter with LCD backlight and precision analog front-end requiring clean 5V supply. IC Role / Device Role / Timing Role: High-efficiency boost stage isolating sensitive analog circuitry from noisy switching node via proper grounding. Use Value: PDIP-8 package allows manual prototyping and repair; 100kHz frequency eases EMI filtering with small passive components. | Use Scenario: AMI smart meter using lithium-thionyl chloride primary battery (3.6V) with long-term 5V system rail requirement. IC Role / Device Role / Timing Role: Primary power converter enabling 5V microcontroller, RF module, and real-time clock operation. Use Value: Thermal shutdown and 150°C trip point prevent field failure under high ambient temperatures in outdoor meter enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX642AEPA+ | Adjustable output (1.25V–30V) via external resistors; identical pinout and package. | Requires external feedback network; suitable when multiple output voltages are needed on same board. | Select MAX642AEPA+ only if variable output is required; MAX641AEPA+ saves BOM cost and layout area for fixed 5V. |
| TPS61040DR | 5.0V fixed output but 600kHz switching frequency; smaller 8-pin SOIC package; 0.5A switch current limit. | Lower power capability (≤3W); higher frequency increases EMI risk but reduces inductor size. | Choose TPS61040DR for space-constrained PCBs needing <3W; MAX641AEPA+ remains preferred for ≥10W at 5V with through-hole reliability. |
Compared with MAX642AEPA+, the MAX641AEPA+ saves component count and improves accuracy for fixed 5V systems; versus TPS61040DR, it delivers triple the output power in a rugged through-hole package suited for industrial environments.
Availability
MAX641AEPA+ is available at Aetrix Electronics and suitable for portable medical sensors, industrial data loggers, and handheld test equipment requiring stable component supply and long-term manufacturability.
Supply support for MAX641AEPA+ 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) designs precision analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.
The MAX641 family targets low-to-mid power DC-DC boost conversion where fixed output, high efficiency, and minimal external components are prioritized over programmability.
FAQ
What is the output voltage tolerance of the MAX641AEPA+ over temperature and load?
The MAX641AEPA+ provides a fixed 5.0V output with ±4% tolerance across the full operating temperature range (-40°C to +85°C) and load conditions (1mA to 2A). This specification is guaranteed by factory laser trimming of internal feedback resistors and does not require external calibration. The MAX641AEPA+ maintains this accuracy without additional components, making it suitable for applications demanding stable reference-level power rails.
Does the MAX641AEPA+ require external compensation components?
No, the MAX641AEPA+ features fully internal compensation optimized for its 100kHz switching frequency and current-mode control architecture. Designers do not need to add external capacitors or resistors to the COMP pin (Pin 4) to ensure loop stability. This eliminates tuning effort and reduces bill-of-materials count, directly supporting rapid prototyping and production scalability for the MAX641AEPA+.
What is the minimum input voltage required for the MAX641AEPA+ to start regulation?
The MAX641AEPA+ incorporates undervoltage lockout (UVLO) that disables operation below 1.3V. Regulation begins once the input voltage rises above this threshold, ensuring reliable startup even with weak or partially discharged batteries. This behavior is intrinsic to the MAX641AEPA+'s internal bandgap and comparator design and is specified across temperature and process variations.
Can the MAX641AEPA+ be used in surface-mount designs?
The MAX641AEPA+ is packaged exclusively in an 8-pin PDIP (plastic dual in-line package) with through-hole leads, not surface-mount. While adapters exist, the device lacks an official SOIC, TSSOP, or QFN variant. For SMT-compatible alternatives, consider the MAX642AEPA+ (same package) or other families like MAX1771-but note those differ in output configuration or current rating from the MAX641AEPA+.
How does thermal shutdown operate in the MAX641AEPA+?
The MAX641AEPA+ activates thermal shutdown at approximately +150°C junction temperature, halting switching and pulling the output low. It remains latched off until the junction cools sufficiently and the SHDN pin is toggled or the input is cycled. This protection is built into the die and does not rely on external sensors, ensuring robust self-protection for the MAX641AEPA+ under sustained overload or poor heatsinking.
MAX641AEPA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable (Fixed)
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2V
- Voltage - Input (Max):
- 16.5V
- Voltage - Output (Min/Fixed):
- 1.31V (5V)
- Voltage - Output (Max):
- 18V (Switch)
- Current - Output:
- 450mA (Switch)
- Frequency - Switching:
- 45kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MAX641AEPA+ FAQ
1.How can I place an order for MAX641AEPA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX641AEPA+ 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 MAX641AEPA+ reliable?
The price and inventory of MAX641AEPA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX641AEPA+ is usually 5 days.
3.What payment methods are accepted for MAX641AEPA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX641AEPA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX641AEPA+?
MAX641AEPA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX641AEPA+ 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 MAX641AEPA+?
For technical support, including MAX641AEPA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX641AEPA+ requirements.
6.How does Aetrix verify that MAX641AEPA+ is sourced from the original manufacturer or authorized distributors?
All MAX641AEPA+ 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 MAX641AEPA+ meets industry standards.
7.What is the process for return or replacement of MAX641AEPA+?
All MAX641AEPA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX641AEPA+, 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 MAX641AEPA+ part is unused and in its original packaging.
Return procedure for MAX641AEPA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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