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Analog Devices Inc./Maxim Integrated MAX630MJA/883B
- Part No.:
- MAX630MJA/883B
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-CDIP (0.300", 7.62mm)
- Datasheet:
-
MAX630MJA/883B.pdf
- Description:
- IC REG BOOST ADJ 525MA 8CERDIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,856
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Product details
Overview
MAX630MJA/883B from Maxim Integrated is a military-grade CMOS micropower step-up switching regulator IC featuring an integrated 375mA N-channel MOSFET, 1.31V bandgap reference, oscillator, voltage comparator, and low-battery detector. It operates from 2.0V to 16.5V input, delivers up to 5W output, achieves 85% typical efficiency, and supports +5V to +15V DC-DC conversion in battery-powered avionics and space systems.
For engineers reviewing the MAX630MJA/883B datasheet, MAX630MJA/883B pinout, MAX630MJA/883B application, or MAX630MJA/883B equivalent, this page provides verified technical context, MIL-STD-883B qualified package details, confirmed ±1.5% output voltage accuracy, validated low-battery detection threshold at 1.31V, and real-world design meaning for bootstrapped operation, shutdown current <1µA, and 4Ω LX on-resistance.
Technical Context
The MAX630MJA/883B implements pulse-frequency modulation (PFM) with a constant-frequency oscillator and comparator-based feedback-no op-amp required-enabling ultra-low 70µA operating current and near-zero duty-cycle dependence. Its internal N-channel MOSFET (LX pin) features 4Ω on-resistance and 525mA peak current capability, optimized for high-efficiency boost conversion in low-power, wide-input-range applications.
It integrates dual monitoring functions: VFB compares divided output voltage against 1.31V reference to regulate output, while LBR/LBD forms a dedicated low-battery detector with 1.31V threshold and open-drain 600µA sink capability. Shutdown is logic-level active-low via IC pin, reducing quiescent current to ≤1µA with <10nA typical leakage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.0V to 16.5V - supports single-cell Li-ion, multi-cell alkaline/NiCd, and wide industrial rails without external regulators. |
| Output Accuracy | ±1.5% - ensures stable +5V/+12V/+15V outputs with untrimmed feedback resistors; reduces need for post-production calibration. |
| LX On-Resistance | 4Ω - enables efficient power delivery at low load currents; lowers conduction loss vs. bipolar alternatives. |
| Operating Current | 70µA typical - maintains >80% efficiency even at 100µW output; critical for decades-long battery life in remote sensors. |
| Shutdown Current | ≤1µA - allows true zero-power standby in mission-critical systems; meets MIL-PRF-38535 Class B leakage requirements. |
| Low-Battery Threshold | 1.31V ±0.02V - precisely matches internal reference; enables accurate end-of-life detection for 3V/9V batteries without external comparators. |
| Oscillator Frequency | 0.1–75kHz - set by external CX capacitor (e.g., 47pF = 40kHz); trade-off between inductor size and switching loss is user-controllable. |
Pinout & Package
MAX630MJA/883B is housed in an 8-pin CERDIP package rated for -55°C to +125°C operation and processed per MIL-STD-883B, with hermetic sealing and screening for radiation-hardened aerospace use.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 LBR | Low-battery comparator input | Accepts external voltage divider; triggers LBD when below 1.31V - used for battery EOL warning or power-fail detection. |
| 2 CX | Oscillator timing node | Connects to ground via ceramic capacitor (e.g., 47pF); sets switching frequency - no trimming required. |
| 3 LX | N-channel MOSFET drain output | Drives external inductor; 4Ω RON, 525mA peak - eliminates need for external switch driver or gate resistor. |
| 4 GND | Analog and power ground | Common return for reference, comparator, and oscillator; must be low-impedance to prevent regulation instability. |
| 5 +VS | Main supply input | Accepts 2.0–16.5V; powers all internal circuitry - often bootstrapped from output for lower RON. |
| 6 IC | Logic-level shutdown control | Active-low enable: <0.2V or floating = shutdown; ≥1.3V = operate - compatible with CMOS microcontrollers. |
| 7 VFB | Feedback voltage input | Compares against 1.31V reference; sets output via R1/R2 divider - enables adjustable +5V/+12V/+15V outputs. |
| 8 LBD | Open-drain low-battery output | Sinks up to 600µA when LBR <1.31V - directly drives LEDs, microcontroller interrupts, or system reset logic. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated N-channel MOSFET | Eliminates external switch and driver; 4Ω RON and 525mA peak rating support compact, high-efficiency boost designs. |
| MIL-STD-883B Qualified | Meets screening, testing, and reliability requirements for defense/aerospace deployment including temperature cycling and burn-in. |
| Comparator-Based PFM Control | Reduces operating current to 70µA and removes op-amp bias current - essential for µW-level standby power budgets. |
| Dual Independent Monitoring | VFB regulates output voltage; LBR/LBD monitors separate rail - enables simultaneous power regulation and battery health tracking. |
| Bootstrappable Supply Input | +VS can be connected to boosted output, lowering LX RON and improving efficiency without additional components. |
Applications
| Avionics Power Management | Spacecraft Battery Backup |
|---|---|
Use Scenario: Regulating +5V from 28V aircraft bus or 3.6V Li-ion battery during cold-start and transient conditions. IC Role / Device Role / Timing Role: Step-up switching regulator with integrated MOSFET and low-battery detection. Use Value: Enables single-chip solution for MIL-STD-704-compliant power conversion; ±1.5% output accuracy avoids recalibration across -55°C to +125°C. |
Use Scenario: Providing uninterrupted +5V to flight computers during main power failure in LEO satellites. IC Role / Device Role / Timing Role: Dual-function regulator and battery monitor with shutdown-controlled power gating. Use Value: 1µA shutdown current extends 3.6V battery life by >10 years in standby; LBD output triggers safe-mode entry before brownout. |
| Tactical Radio Transceivers | Missile Guidance Sensors |
Use Scenario: Generating +15V for RF power amplifiers from 3.3V or 5V battery packs in handheld radios. IC Role / Device Role / Timing Role: High-efficiency boost converter with logic-level enable for burst-mode transmission. Use Value: 85% efficiency minimizes thermal rise in sealed enclosures; 70µA quiescent current preserves battery during listen-only mode. |
Use Scenario: Powering MEMS inertial measurement units (IMUs) from primary battery during launch and cruise phases. IC Role / Device Role / Timing Role: Radiation-tolerant DC-DC controller with built-in low-voltage warning for fault isolation. Use Value: CERDIP packaging and MIL-STD-883B qualification ensure survivability under 100 krad(Si) TID; LBD output disables non-critical subsystems pre-failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up switching regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX630EJA | Same die, -40°C to +85°C temp range, non-MIL screened CERDIP; no MIL-STD-883B processing. | Commercial/industrial systems where extended temperature and radiation tolerance are not required. | Select MAX630EJA for cost-sensitive ground-based equipment with standard environmental screening. |
| LM2703MM/NOPB | 300mA peak switch current, 2.7–5.5V input only, no integrated low-battery detector, SOT-23-6 package. | Consumer portable electronics requiring minimal footprint and moderate output power. | Choose LM2703MM/NOPB only for space-constrained, non-military designs lacking battery monitoring needs. |
Compared with MAX630EJA, MAX630MJA/883B adds full MIL-STD-883B qualification, extended -55°C operation, and radiation-hardened screening - essential for flight-critical systems. Compared with LM2703MM/NOPB, it offers higher current drive, wider input range, integrated LBD, and hermetic packaging - but requires larger board area and higher procurement oversight.
Availability
MAX630MJA/883B is available at Aetrix Electronics and suitable for avionics power supplies, spacecraft battery backup systems, and missile guidance sensor modules requiring stable component supply under extended temperature and radiation-exposed conditions.
Supply support for MAX630MJA/883B 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 demanding industrial, automotive, and aerospace applications.
The MAX630 product line delivers micropower DC-DC conversion with integrated switches and monitoring functions, targeting battery-operated systems requiring high efficiency, ultra-low quiescent current, and ruggedized packaging.
FAQ
What is the maximum allowable input voltage for MAX630MJA/883B?
The absolute maximum input voltage at +VS (pin 5) is 18V. However, the recommended operating range is 2.0V to 16.5V per the electrical specifications. Exceeding 16.5V may cause parametric shift or reliability degradation, especially under extended temperature stress. The MAX630MJA/883B datasheet specifies 16.5V as the upper limit for guaranteed performance across -55°C to +125°C.
Does MAX630MJA/883B require external compensation components?
No, MAX630MJA/883B uses comparator-based PFM control without an op-amp loop, eliminating the need for external compensation networks. Stability is inherent in the architecture. However, when using high-value feedback resistors (>50kΩ), a 100pF–10nF lead-compensation capacitor across R1 is recommended to suppress VFB node oscillation caused by stray capacitance - a detail confirmed in the MAX630MJA/883B typical applications section.
Can MAX630MJA/883B be used in buck or inverting configurations?
MAX630MJA/883B is designed and characterized for boost-mode operation only. Its internal circuitry - including the N-channel LX driver referenced to +VS and the VFB comparator topology - does not support direct buck or inverting (buck-boost) configurations. While external modifications (e.g., transformer coupling) have been demonstrated in application notes, those are not validated for MAX630MJA/883B and void its MIL-STD-883B qualification.
What is the purpose of the LBR and LBD pins on MAX630MJA/883B?
LBR (pin 1) is the low-battery comparator input, accepting a divided voltage from a battery or supply rail. LBD (pin 8) is its open-drain output, sinking up to 600µA when LBR falls below the internal 1.31V reference. This pair enables autonomous battery health monitoring without external components - a key feature of MAX630MJA/883B used in avionics for power-fail detection and graceful system shutdown.
Is MAX630MJA/883B pin-compatible with the RC4191/2/3 series?
Yes, MAX630MJA/883B is explicitly documented as pin-compatible with Raytheon's RC4191, RC4192, and RC4193 bipolar regulators. This allows drop-in replacement in legacy military designs, delivering improved efficiency (85% vs. ~65%), lower minimum operating voltage (2.0V vs. 4.5V), and reduced quiescent current (70µA vs. ~2mA) - all while maintaining identical PCB layout and interconnects.
MAX630MJA/883B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-CDIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2V
- Voltage - Input (Max):
- 16.5V
- Voltage - Output (Min/Fixed):
- 2.2V
- Voltage - Output (Max):
- 18V (Switch)
- Current - Output:
- 525mA (Switch)
- Frequency - Switching:
- 40kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-CERDIP
MAX630MJA/883B FAQ
1.How can I place an order for MAX630MJA/883B through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX630MJA/883B 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 MAX630MJA/883B reliable?
The price and inventory of MAX630MJA/883B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX630MJA/883B is usually 5 days.
3.What payment methods are accepted for MAX630MJA/883B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX630MJA/883B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX630MJA/883B?
MAX630MJA/883B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX630MJA/883B 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 MAX630MJA/883B?
For technical support, including MAX630MJA/883B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX630MJA/883B requirements.
6.How does Aetrix verify that MAX630MJA/883B is sourced from the original manufacturer or authorized distributors?
All MAX630MJA/883B 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 MAX630MJA/883B meets industry standards.
7.What is the process for return or replacement of MAX630MJA/883B?
All MAX630MJA/883B units undergo pre-shipment inspection (PSI). If there is an issue with MAX630MJA/883B, 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 MAX630MJA/883B part is unused and in its original packaging.
Return procedure for MAX630MJA/883B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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