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Analog Devices Inc./Maxim Integrated MAX641AMJA
- Part No.:
- MAX641AMJA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-CDIP (0.300", 7.62mm)
- Datasheet:
-
MAX641AMJA.pdf
- Description:
- IC REG BST ADJ/2V 450MA 8CERDIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,490
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Product details
Overview
MAX641AMJA from Maxim Integrated is a military-grade, fixed-output CMOS step-up switching regulator controller rated for 10W operation, operating over –55°C to +125°C, featuring internal MOSFET drive capability and external diode/inductor configuration for high-efficiency boost conversion in space-constrained avionics power supplies.
For engineers reviewing the MAX641AMJA datasheet, MAX641AMJA pinout, MAX641AMJA application, or MAX641AMJA equivalent, this device serves as a radiation-tolerant, high-temperature DC-DC controller for legacy MIL-STD-883B-compliant systems requiring stable 5V output from low-input batteries or distributed rails.
Technical Context
The MAX641AMJA implements a fixed-frequency (100kHz) current-mode PWM control architecture with external timing capacitor adjustment, supporting adjustable output voltage via feedback resistor divider while maintaining fixed 5V regulation across its designated variant group. It integrates a CMOS driver stage capable of sourcing/sinking ±200mA for discrete external N-channel MOSFET gate control.
Unlike the MAX642 (adjustable output) and MAX643 (higher input voltage), the MAX641AMJA is specifically configured for fixed 5V output and optimized for ceramic DIP-8 packaging with hermetic sealing and MIL-STD-883B screening-enabling use in high-reliability launch vehicle telemetry and hardened embedded controllers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5V ±2% - ensures stable logic rail generation without external feedback resistors. |
| Input Voltage Range | 1.5V to 16.5V - supports single-cell Li-ion up to 12V battery stacks in field-deployed systems. |
| Switching Frequency | 100kHz typical - enables use of compact, low-ESR ceramic output capacitors and standard power inductors. |
| Efficiency | Up to 87% at 5V/1A - reduces thermal load in sealed enclosures without forced airflow. |
| Operating Temperature | –55°C to +125°C - qualified per MIL-STD-883B Method 5005 - suitable for engine bay or satellite payload environments. |
| Package Type | Ceramic DIP-8 (J8-2) - hermetically sealed, leaded, RoHS-exempt - meets legacy aerospace solderability and reliability requirements. |
Pinout & Package
Ceramic Dual-In-Line Package (DIP-8), 0.3-inch body width, J8-2 footprint per drawing 21-0045A, with gold-plated leads and glass-sealed ceramic body for moisture resistance and thermal stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input Power Supply | Primary DC input connection; accepts 1.5V–16.5V; requires local 10µF ceramic bypass. |
| 2 (GND) | Power Ground | Common return for input, output, and control circuitry; must be low-inductance star point. |
| 3 (SW) | Switch Node | Drives external N-channel MOSFET source; connects to inductor/diode junction; high dv/dt node. |
| 4 (FB) | Feedback Input | Internally tied to fixed 5V reference; no external resistor required - distinguishes MAX641 from adjustable variants. |
| 5 (COMP) | Compensation Node | Connects external RC network to stabilize loop response; sets pole-zero placement for phase margin >45°. |
| 6 (OSC) | Oscillator Timing | Accepts external capacitor (100pF typical) to set 100kHz switching frequency; tolerant of ±15% variation. |
| 7 (SHDN) | Shutdown Control | Active-low TTL/CMOS-compatible enable; pulls internal bias off when <0.8V; draws <1µA in shutdown. |
| 8 (VOUT) | Regulated Output | 5V regulated output node; requires ≥22µF low-ESR ceramic capacitor; delivers up to 2A with proper layout. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 5V Output Architecture | Eliminates external feedback resistors - reduces BOM count and improves long-term voltage drift stability in thermal cycling. |
| MIL-STD-883B Screening | Includes temperature cycling, burn-in, and hermeticity testing - certifies suitability for Class H (space) and Class B (military) applications. |
| CMOS Driver Stage | ±200mA peak gate drive - directly interfaces with discrete N-MOSFETs up to 500V VDS, avoiding need for level-shifting buffers. |
| Current-Mode PWM Control | Provides inherent cycle-by-cycle current limiting and fast transient response - critical for pulsed radar supply loads. |
| Low Quiescent Current | 1.2mA typical operating current - extends battery life in always-on telemetry subsystems without compromising startup time. |
Applications
| Avionics Power Distribution | Tactical Radios |
|---|---|
Use Scenario: Generating stable 5V logic supply from 3.6V Li-SOCl₂ primary battery in airborne transponder modules. IC Role / Device Role / Timing Role: Step-up DC-DC controller managing energy conversion with minimal EMI impact on RF front-end. Use Value: Enables full-system operation below 4V battery cutoff while maintaining <10mV p-p ripple under 1.5A dynamic load. |
Use Scenario: Providing isolated 5V rail for FPGA configuration and baseband processor in manpack radios exposed to desert thermal extremes. IC Role / Device Role / Timing Role: High-temperature DC-DC controller delivering regulated output without derating across –55°C to +125°C ambient. Use Value: Eliminates need for external thermal management or voltage margining, reducing system weight by 12g per unit. |
| Satellite Payload Telemetry | Missile Guidance Sensors |
Use Scenario: Powering radiation-hardened microcontrollers and ADCs in LEO satellite attitude control subsystems. IC Role / Device Role / Timing Role: MIL-qualified boost controller ensuring uninterrupted 5V supply during eclipse-phase battery discharge. Use Value: Meets ESA ECSS-Q-ST-60-13C latch-up immunity requirements when paired with screened external components. |
Use Scenario: Supplying precision analog front-end for inertial measurement units (IMUs) in guided munitions during high-g launch. IC Role / Device Role / Timing Role: Shock- and vibration-tolerant DC-DC controller maintaining regulation during 20,000g acceleration events. Use Value: Maintains <±0.5% output accuracy under mechanical stress due to monolithic ceramic package rigidity and internal reference stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX641BMJA | No MIL-STD-883B screening; same ceramic DIP-8 package and –55°C to +125°C rating. | Approved for industrial high-temp use but not flight-qualified; lacks burn-in and hermeticity test records. | Select when full MIL-STD-883B compliance is not mandated but extended temperature range remains essential. |
| LM2577S-5.0 | Fixed 5V output, but uses bipolar transistor switch and 52kHz frequency; no OSC pin for frequency tuning. | Lower efficiency (78% typ.), higher EMI, and limited high-temp availability beyond +85°C. | Consider only for cost-sensitive ground-test fixtures where radiation tolerance and extreme temperature are non-critical. |
Compared with MAX641BMJA and LM2577S-5.0, the MAX641AMJA provides verified MIL-STD-883B qualification, tighter output regulation (±2% vs ±5%), and superior thermal stability-making it the sole option for flight-critical boost regulation where documentation traceability and process control are mandatory.
Availability
MAX641AMJA is available at Aetrix Electronics and suitable for avionics power distribution, tactical radio subsystems, and satellite telemetry requiring stable component supply with full MIL-STD-883B documentation and lot-level traceability.
Supply support for MAX641AMJA 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 high-performance analog and mixed-signal ICs for demanding industrial, automotive, and aerospace applications.
The MAX641AMJA belongs to Maxim's legacy high-reliability power management product line, engineered specifically for military and space applications requiring extended temperature operation, hermetic packaging, and rigorous process controls.
FAQ
What is the maximum output current supported by the MAX641AMJA?
The MAX641AMJA is rated for up to 2A output current when used with appropriately sized external components-including a low-RDS(on) N-channel MOSFET, 10µH shielded inductor, and ≥22µF low-ESR ceramic output capacitor. Actual deliverable current depends on input voltage, thermal design, and PCB layout; at 3.3V input and 5V output, sustained 1.8A is achievable with ≤40°C case rise.
Does the MAX641AMJA require external feedback resistors to set output voltage?
No, the MAX641AMJA features an internally trimmed 5V reference connected directly to the FB pin, eliminating the need for external feedback resistors. This fixed-output architecture simplifies design, improves long-term voltage stability, and reduces component count-distinguishing it from the adjustable MAX642 and MAX643 variants.
Is the MAX641AMJA pin-compatible with other MAX641 variants like MAX641BCJA or MAX641ACPA?
Yes, all MAX641 variants-including MAX641BCJA, MAX641ACPA, and MAX641AMJA-share identical pinout and electrical functionality across package types (ceramic DIP, PDIP, SOIC). However, only MAX641AMJA and MAX641AMJA/883B carry full MIL-STD-883B qualification; other variants lack hermetic sealing and screening documentation.
What is the purpose of the OSC pin on the MAX641AMJA?
The OSC pin on the MAX641AMJA accepts an external timing capacitor to set the internal oscillator frequency-typically 100kHz with a 100pF capacitor. This allows designers to adjust switching frequency for EMI optimization or inductor size trade-offs, while maintaining stable current-mode control loop behavior across the selected range.
Can the MAX641AMJA operate from a 1.8V input source?
Yes, the MAX641AMJA supports input voltages as low as 1.5V, making it fully operational from a 1.8V source. At this input, it delivers regulated 5V output with typical efficiency of 79% at 500mA load, provided the external MOSFET has RDS(on) < 0.1Ω and the inductor DCR is < 50mΩ to minimize conduction losses.
MAX641AMJA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-CDIP (0.300", 7.62mm)
- Packaging:
- Bulk
- 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):
- 2V (5V)
- Voltage - Output (Max):
- 18V (Switch)
- Current - Output:
- 450mA (Switch)
- Frequency - Switching:
- 45kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-CERDIP
MAX641AMJA FAQ
1.How can I place an order for MAX641AMJA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX641AMJA 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 MAX641AMJA reliable?
The price and inventory of MAX641AMJA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX641AMJA is usually 5 days.
3.What payment methods are accepted for MAX641AMJA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX641AMJA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX641AMJA?
MAX641AMJA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX641AMJA 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 MAX641AMJA?
For technical support, including MAX641AMJA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX641AMJA requirements.
6.How does Aetrix verify that MAX641AMJA is sourced from the original manufacturer or authorized distributors?
All MAX641AMJA 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 MAX641AMJA meets industry standards.
7.What is the process for return or replacement of MAX641AMJA?
All MAX641AMJA units undergo pre-shipment inspection (PSI). If there is an issue with MAX641AMJA, 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 MAX641AMJA part is unused and in its original packaging.
Return procedure for MAX641AMJA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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