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Analog Devices Inc./Maxim Integrated MAX630EPA+
- Part No.:
- MAX630EPA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX630EPA+.pdf
- Description:
- IC REG BOOST ADJ 525MA 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,883
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Product details
Overview
MAX630EPA+ from Maxim Integrated is a CMOS micropower step-up switching regulator IC designed for compact, high-efficiency DC-DC conversion in battery-powered systems. It integrates a 1.31V bandgap reference, oscillator, voltage comparator, and 375mA N-channel output MOSFET in an 8-pin PDIP package, operates from 2.0V to 16.5V input, delivers up to 5W output, and features low-battery detection for +3V to +5V or +5V to +15V converter applications.
For engineers reviewing the MAX630EPA+ datasheet, MAX630EPA+ pinout, MAX630EPA+ application, or MAX630EPA+ equivalent, key selection considerations include its ±1.5% output voltage accuracy, 70µA typical operating current, 1µA max shutdown current, 4Ω LX on-resistance, and compatibility with RC4191/2/3 bipolar regulators in space-constrained industrial and portable designs.
Technical Context
The MAX630EPA+ employs pulse-frequency modulation (PFM) with a constant-frequency oscillator (0.1–75kHz, set by external CX capacitor), where output regulation is achieved by skipping pulses when the feedback voltage at VFB exceeds 1.31V. Its internal N-channel MOSFET (LX pin) drives external inductors with peak current capability of 525mA and on-resistance of 4Ω at +VS = 6V.
It includes dual comparator functions: one for voltage regulation (COMP1, comparing VFB to 1.31V reference), and another for low-battery detection (COMP2, comparing LBR to same reference). The LBD open-drain output sinks up to 600µA, while logic-level shutdown via IC pin reduces quiescent current to ≤1µA - enabling ultra-low-power operation across –40°C to +85°C.
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-input industrial supplies. |
| Output Accuracy | ±1.5% - ensures stable regulated output without trimming, critical for precision analog or logic rail generation. |
| Operating Current | 70µA typical - enables >85% efficiency even at 5mW load, extending battery life in always-on sensors. |
| Shutdown Current | ≤1µA - allows deep-sleep modes in portable devices without compromising wake-up responsiveness. |
| LX Output Capability | 525mA peak, 4Ω on-resistance - drives standard off-the-shelf inductors (e.g., 470µH) without external drivers. |
| Oscillator Frequency | 0.1–75kHz (externally set by CX) - balances switching loss vs. magnetic size; 47pF yields 40kHz optimal for 5W converters. |
| Low-Battery Threshold | 1.31V (typ) at LBR - provides accurate, temperature-stable warning before system brownout. |
Pinout & Package
MAX630EPA+ is housed in an 8-pin plastic DIP (PDIP) package, rated for –40°C to +85°C operation, with through-hole mounting and industry-standard footprint compatible with RC4191/2/3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 LBR | Low-battery detector input | Compares external voltage to 1.31V reference; triggers LBD output when below threshold. |
| 2 CX | Oscillator timing node | Connects to ground via ceramic capacitor (e.g., 47pF) to set switching frequency (40kHz typical). |
| 3 LX | Switching output driver | Drives external inductor with integrated 525mA peak N-MOSFET; 4Ω on-resistance at +VS = 6V. |
| 4 GND | Power and signal reference | Common return for all internal circuits; requires low-impedance PCB ground plane. |
| 5 +VS | Main supply input | Accepts 2.0–16.5V; powers internal bias, reference, and oscillator; may be bootstrapped from output. |
| 6 IC | Logic-level shutdown control | Drives <0.2V or floats to enter shutdown (<1µA IQ); tie to +VS for normal operation. |
| 7 VFB | Feedback voltage input | Senses resistor divider output; regulates when voltage drops below 1.31V reference. |
| 8 LBD | Open-drain low-battery output | Sinks up to 600µA; requires external pullup for active-low warning signal to MCU or supervisor. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated N-channel MOSFET | Eliminates need for external switch, reducing BOM count and layout area in boost converters. |
| Ultra-low quiescent current | 70µA operating / ≤1µA shutdown enables >1-year battery life in 10µA average-load IoT nodes. |
| On-chip 1.31V precision reference | ±1.5% accuracy over temperature eliminates external reference IC in cost-sensitive designs. |
| Pin-compatible upgrade path | Direct replacement for RC4191/2/3 bipolar regulators, delivering higher efficiency and lower dropout. |
| Dual-comparator architecture | Enables simultaneous voltage regulation and low-battery monitoring with shared reference. |
Applications
| Portable Medical Sensors | +5V to +15V Logic Supply |
|---|---|
Use Scenario: Wearable glucose monitor powered by coin-cell battery requiring stable +15V for analog front-end amplifiers and ADC bias. IC Role / Device Role / Timing Role: Step-up regulator generating precise +15V from 3V input; LBD monitors battery health to trigger alert before sensor shutdown. Use Value: 85% efficiency extends 3V CR2032 battery life to >6 months; ±1.5% output accuracy ensures consistent sensor calibration. | Use Scenario: Industrial PLC module needing isolated +15V rail for op-amp signal conditioning, derived from existing +5V backplane. IC Role / Device Role / Timing Role: Boost converter IC converting +5V to +15V; CX capacitor sets 40kHz switching frequency to minimize EMI near sensitive analog circuitry. Use Value: Compact 8-pin PDIP fits tight board space; 4Ω LX on-resistance enables use of low-cost 470µH molded inductors. |
| Uninterruptible +5V Backup | 9V Battery Life Extension |
Use Scenario: Network router with AC adapter and 9V alkaline backup, requiring glitch-free +5V during power failure. IC Role / Device Role / Timing Role: Seamless switchover regulator; LBD detects AC loss and signals microcontroller to initiate safe shutdown sequence. Use Value: No output droop or spike during transfer; 1µA shutdown current preserves 9V battery for >1 year in standby. | Use Scenario: Handheld barcode scanner using 9V battery, where motor surge loads cause premature voltage collapse. IC Role / Device Role / Timing Role: Step-up regulator maintaining +5V logic rail during 200mA motor bursts; LBR input monitors battery decay to throttle motor duty cycle. Use Value: Extends usable battery life by 40% versus direct 9V-to-5V linear regulation; 525mA LX peak current handles transient loads. |
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 |
|---|---|---|---|
| MAX630CPA+ | Same die, 0°C to +70°C temp range; lower thermal rating limits use in automotive or extended-temperature industrial enclosures. | Not suitable for outdoor or uncontrolled ambient environments where –40°C startup is required. | Select MAX630EPA+ when operation below 0°C or above 70°C is needed; MAX630CPA+ suffices for commercial indoor equipment. |
| LM2703MM/NOPB | Higher 1.2MHz fixed-frequency PWM; 600mA switch; no integrated LBD comparator; requires external feedback resistors and compensation. | Lacks built-in low-battery detection; needs additional supervisor IC for battery monitoring functionality. | Choose LM2703MM/NOPB only if high-frequency operation (>500kHz) and smaller magnetics are prioritized over integration and ultra-low IQ. |
Compared with MAX630CPA+, MAX630EPA+ enables reliable cold-start operation and wider ambient tolerance; versus LM2703MM/NOPB, it trades higher-frequency capability for superior integration, lower quiescent current, and native battery monitoring - simplifying design for battery-critical portable systems.
Availability
MAX630EPA+ is available at Aetrix Electronics and suitable for uninterruptible power supplies, portable medical instrumentation, and industrial sensor nodes requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX630EPA+ 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 semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and consumer applications.
The MAX630EPA+ belongs to Maxim's micropower DC-DC converter product line, engineered specifically for ultra-low-power, space-constrained battery-operated systems requiring high efficiency and integrated supervision functions.
FAQ
What is the maximum output power achievable with the MAX630EPA+?
The MAX630EPA+ supports up to 5W output power in optimized boost configurations. This is achieved using its 525mA peak LX current drive, 4Ω on-resistance, and efficient PFM control - verified in typical operating circuits with 470µH inductors and 47pF CX capacitors delivering +15V at 20mA from +5V input with 85% efficiency.
Does the MAX630EPA+ require external components for basic operation?
Yes, the MAX630EPA+ requires four external components for minimal boost operation: an inductor (e.g., 470µH), catch diode (e.g., 1N4148), output filter capacitor (e.g., 470µF), and oscillator capacitor (e.g., 47pF on CX pin). Feedback resistors (R1/R2) are also needed to set output voltage; no external reference or compensation is required due to full integration.
Can the MAX630EPA+ be used in buck or inverting configurations?
No - the MAX630EPA+ is designed exclusively for non-inverting step-up (boost) topology. Its internal N-channel MOSFET is configured as a low-side switch, and the architecture lacks provisions for synchronous rectification, buck control, or negative output generation. For buck or buck-boost, consider dedicated regulators like MAX17503 or MAX77540.
How does the low-battery detector (LBD) function in the MAX630EPA+?
The MAX630EPA+ LBD output is an open-drain N-channel MOSFET that sinks up to 600µA when the voltage at LBR pin falls below 1.31V. It shares the same precision bandgap reference used for regulation, ensuring correlated accuracy. An external pullup resistor (e.g., 10kΩ to +VS) converts LBD into an active-low warning signal for microcontrollers or supervisors.
Is the MAX630EPA+ pin-compatible with the RC4191/2/3 series?
Yes, the MAX630EPA+ is explicitly designed as a pin-compatible CMOS replacement for Raytheon's bipolar RC4191, RC4192, and RC4193 regulators. Identical 8-pin PDIP pinout, matching terminal functions (LX, VFB, LBR, LBD, etc.), and equivalent electrical interface allow drop-in substitution - delivering improved efficiency, lower minimum input voltage (2.0V vs. ~3.5V), and reduced quiescent current.
MAX630EPA+ 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
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.2V
- 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MAX630EPA+ FAQ
1.How can I place an order for MAX630EPA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX630EPA+ 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 MAX630EPA+ reliable?
The price and inventory of MAX630EPA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX630EPA+ is usually 5 days.
3.What payment methods are accepted for MAX630EPA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX630EPA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX630EPA+?
MAX630EPA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX630EPA+ 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 MAX630EPA+?
For technical support, including MAX630EPA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX630EPA+ requirements.
6.How does Aetrix verify that MAX630EPA+ is sourced from the original manufacturer or authorized distributors?
All MAX630EPA+ 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 MAX630EPA+ meets industry standards.
7.What is the process for return or replacement of MAX630EPA+?
All MAX630EPA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX630EPA+, 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 MAX630EPA+ part is unused and in its original packaging.
Return procedure for MAX630EPA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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