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Analog Devices Inc./Maxim Integrated MAX630ESA+T
- Part No.:
- MAX630ESA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX630ESA+T.pdf
- Description:
- IC REG BOOST ADJ 525MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,196
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Product details
Overview
MAX630ESA+T from Maxim Integrated is a CMOS micropower step-up switching regulator IC integrating a 1.31V bandgap reference, oscillator, voltage comparator, and 375mA N-channel output MOSFET in an 8-pin SO package. It operates from 2.0V to 16.5V input, delivers up to 5W output, achieves 85% typical efficiency, and features logic-level shutdown (<1µA quiescent current) and low-battery detection - used in battery-life extension and uninterruptible +5V supplies.
For engineers reviewing the MAX630ESA+T datasheet, MAX630ESA+T pinout, MAX630ESA+T application, or MAX630ESA+T equivalent, this page provides verified circuit role (step-up DC-DC controller), exact package (SO-8), confirmed parameters (±1.5% VREF, 70µA operating current, 4Ω LX on-resistance, 525mA peak switch current, 40kHz typical frequency), and real-world design implications for low-power portable systems.
Technical Context
The MAX630ESA+T implements pulse-frequency modulation (PFM) with a constant-frequency oscillator (40kHz typical) and comparator-based feedback - not PWM - enabling ultra-low operating current independent of load duty cycle. Its internal 1.31V reference sets output via external resistor divider at VFB (pin 7), while LBR (pin 1) and LBD (pin 8) form a dedicated low-battery detection path referenced to the same bandgap.
It integrates a 4Ω on-resistance N-channel MOSFET at LX (pin 3) rated for 525mA peak current, driven directly without base/gate drive loss. Shutdown is asserted by pulling IC (pin 6) below 0.2V, reducing supply current to ≤1µA - critical for battery-powered standby modes where leakage dominates runtime.
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 LDO pre-regulation. |
| Reference Voltage Accuracy | ±1.5% (MAX630) - enables untrimmed ±3.5% output accuracy with 1% feedback resistors, eliminating calibration in cost-sensitive designs. |
| Operating Current | 70µA typical - ensures >80% efficiency even at 100µA output loads; current scales minimally with duty cycle or switch current. |
| LX Output Driver | 4Ω on-resistance, 525mA peak current - reduces conduction loss in boost inductor path; eliminates need for external gate driver or bipolar transistor. |
| Oscillator Frequency | 40kHz typical (set by 47pF CX capacitor) - balances switching loss vs. inductor size; stable across temperature and supply voltage. |
| Shutdown Quiescent Current | ≤1µA - extends shelf life and standby time in battery-backed systems; triggered by logic-low or floating IC pin. |
| Low-Battery Detection | 1.31V threshold at LBR (pin 1), open-drain LBD (pin 8) sinking 250–600µA - provides system-level power-fail warning without additional supervisor IC. |
Pinout & Package
MAX630ESA+T is housed in an 8-pin SO (Small Outline) package, surface-mount, RoHS-compliant, with standard JEDEC MS-012AC footprint and 1.27mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 LBR | Low-battery comparator input | Monitors external voltage against 1.31V internal reference; asserts LBD when below threshold - used for battery voltage monitoring or power-fail detection. |
| 2 CX | Oscillator timing capacitor node | Connects to ground via 47pF ceramic capacitor to set 40kHz switching frequency; low sensitivity to capacitor tolerance or PCB stray capacitance. |
| 3 LX | Switching node / N-channel MOSFET drain | Drives external boost inductor; 4Ω on-resistance and 525mA peak rating enable direct interface to 470µH–1mH inductors without external FET. |
| 4 GND | Analog and power ground | Common return for reference, comparator, oscillator, and LX current path; requires low-impedance PCB pour to minimize noise coupling. |
| 5 +VS | Main supply input | Accepts 2.0V–16.5V; can be bootstrapped from output for lower LX RON, or tied to input for simplicity in low-current applications. |
| 6 IC | Logic-level shutdown control | Pulled high to +VS for operation; driven <0.2V or left floating to enter shutdown mode (<1µA IQ); compatible with CMOS outputs. |
| 7 VFB | Feedback input / reference comparison node | Compares divided output voltage against 1.31V reference; bias current ≤10nA allows high-value feedback resistors (>1MΩ) to minimize divider loss. |
| 8 LBD | Open-drain low-battery detector output | Sinks up to 600µA when LBR <1.31V; requires external pullup to enable system interrupt or LED indicator without added components. |
Key Features
| Feature | Design Value |
|---|---|
| CMOS micropower architecture | 70µA operating current enables >10-year battery life in 10µA-load IoT sensors using coin cells - no external bias network required. |
| Integrated 4Ω N-channel MOSFET | Eliminates external switch and gate driver, reducing BOM count by 3–5 parts and PCB area by >25mm² versus discrete boost controllers. |
| Comparator-based PFM control | Removes op-amp and compensation network; simplifies loop stability and avoids phase-margin tuning across load/temperature. |
| Dedicated low-battery detection path | Shares internal 1.31V reference with regulation loop - ensures consistent threshold without trimming or matching drift over temperature. |
| Pin-compatible with RC4191/2/3 | Enables drop-in upgrade from legacy Raytheon bipolar regulators, delivering 2× efficiency and extended low-voltage operation (down to 2.0V). |
Applications
| Portable Medical Sensors | +5V to +15V DC-DC Converter |
|---|---|
Use Scenario: Wearable ECG patch powered by single 3V CR2032 battery requiring regulated +5V for ADC and +15V for analog front-end op-amps. IC Role / Device Role / Timing Role: Step-up DC-DC controller generating dual rail from 3V input; uses bootstrapped +VS for optimal LX RON. Use Value: 85% efficiency extends battery life to >6 months; integrated LBD alerts MCU when battery drops below 2.2V, triggering data save before shutdown. |
Use Scenario: Industrial PLC module converting +5V bus to isolated +15V for analog signal conditioning in noisy factory environments. IC Role / Device Role / Timing Role: Primary boost regulator with fixed 40kHz switching; VFB divider sets precise +15V output; CX capacitor ensures stable frequency under EMI stress. Use Value: ±1.5% reference accuracy yields ±3.5% output tolerance with 1% resistors - meets industrial analog accuracy requirements without post-assembly trim. |
| Uninterruptible +5V Power Supply | 9V Battery Life Extension |
Use Scenario: Network router with AC adapter and backup NiMH battery, requiring glitch-free +5V during AC brownouts. IC Role / Device Role / Timing Role: Always-on boost controller sourcing +5V from either AC-derived 4.4V or 3.6V battery; LBD monitors AC rail for early fail detection. Use Value: Seamless switchover with zero output dip; shutdown current <1µA preserves battery charge during weeks of standby. |
Use Scenario: Handheld barcode scanner using 9V alkaline battery, needing extended runtime at 100mA peak load. IC Role / Device Role / Timing Role: High-efficiency boost converter stepping 6.5V–9V input to stable +5V; LBR/LBD detects end-of-life voltage (~6.0V) to disable motor before deep discharge. Use Value: 85% efficiency adds ~25% usable capacity vs. linear regulator; integrated detection replaces separate supervisor IC, saving board space and cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up DC-DC controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX631ESA+T | Fixed 5V output; no external feedback divider needed; same SO-8 package and pinout. | Used where output voltage is invariant; eliminates two resistors but loses programmability. | Select MAX631ESA+T only if 5V output suffices and BOM reduction outweighs flexibility loss. |
| TPS61040DRVR | Higher 28V input rating, 0.5A switch, 500kHz switching; requires external compensation; different pinout. | Better suited for higher-power or smaller-inductor designs; lacks integrated low-battery detector. | Choose TPS61040DRVR when >100mA output or compact layout is critical; accept added complexity and missing LBD function. |
Compared with MAX630ESA+T, MAX631ESA+T trades programmability for simplicity in fixed-5V use cases, while TPS61040DRVR offers higher frequency and current at the cost of external components and no built-in battery monitoring - making MAX630ESA+T optimal for low-power, battery-aware, adjustable-output applications.
Availability
MAX630ESA+T is available at Aetrix Electronics and suitable for portable medical sensors, uninterruptible +5V power supplies, 9V battery life extension circuits, and industrial +5V-to-+15V DC-DC converters requiring stable component supply across production lifecycles.
Supply support for MAX630ESA+T 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, automotive, and communications markets.
The MAX630ESA+T belongs to Maxim's micropower DC-DC converter product line, designed specifically for ultra-low-quiescent-current, battery-operated systems requiring reliable voltage boosting with minimal external components.
FAQ
What is the maximum output power achievable with the MAX630ESA+T?
The MAX630ESA+T supports up to 5W output power in optimized boost configurations - verified in typical operating circuits using 470µH inductors and 40kHz switching. Achievable power depends on input voltage, inductor saturation current, and thermal management; at 2.0V input, practical output is ~20mA @ +5V, while at 12V input it can sustain >400mA @ +15V. The MAX630ESA+T datasheet specifies 525mA peak LX current and 4Ω on-resistance as key limits.
Does the MAX630ESA+T require external compensation components?
No, the MAX630ESA+T uses comparator-based pulse-frequency modulation (PFM) with inherent stability - no external compensation capacitor or resistor network is needed. Its feedback loop relies solely on the VFB resistor divider and internal 1.31V reference, eliminating phase-margin analysis and simplifying layout. This contrasts with op-amp-based PWM controllers that mandate external compensation; the MAX630ESA+T achieves stable regulation with only two resistors and one capacitor (CX).
Can the MAX630ESA+T operate from a single 1.5V alkaline cell?
No - the MAX630ESA+T has a minimum operating voltage of 2.0V, as specified in Absolute Maximum Ratings and Electrical Characteristics tables. Startup requires ≥1.9V, and stable regulation begins at 2.0V. A single 1.5V alkaline cell falls below this threshold; however, the MAX630ESA+T can operate from two series AA/AAA cells (3.0V nominal) or a partially discharged 9V battery down to ~6.5V. For true 1.5V operation, consider the MAX660 or MAX680 families.
How does the low-battery detector in the MAX630ESA+T differ from standard reset supervisors?
The MAX630ESA+T low-battery detector uses the same 1.31V internal bandgap reference as the main regulator, ensuring matched temperature drift and process variation - unlike standalone supervisors with independent references. It provides an open-drain output (LBD) sinking up to 600µA, allowing direct interface to microcontroller interrupts or LEDs without pullup resistors. Critically, it operates independently of the main control loop, remaining functional even during shutdown mode.
Is the MAX630ESA+T pin-compatible with the MAX630CSA?
Yes - both MAX630ESA+T and MAX630CSA use identical 8-pin SO packages with identical pinout, electrical specifications, and thermal characteristics. The only difference is operating temperature range: MAX630ESA+T is rated for –40°C to +85°C, while MAX630CSA is 0°C to +70°C. All other parameters - including 70µA operating current, 4Ω LX RON, and ±1.5% reference accuracy - are identical per datasheet Tables 1 and 2.
MAX630ESA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX630ESA+T FAQ
1.How can I place an order for MAX630ESA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX630ESA+T 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 MAX630ESA+T reliable?
The price and inventory of MAX630ESA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX630ESA+T is usually 5 days.
3.What payment methods are accepted for MAX630ESA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX630ESA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX630ESA+T?
MAX630ESA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX630ESA+T 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 MAX630ESA+T?
For technical support, including MAX630ESA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX630ESA+T requirements.
6.How does Aetrix verify that MAX630ESA+T is sourced from the original manufacturer or authorized distributors?
All MAX630ESA+T 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 MAX630ESA+T meets industry standards.
7.What is the process for return or replacement of MAX630ESA+T?
All MAX630ESA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX630ESA+T, 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 MAX630ESA+T part is unused and in its original packaging.
Return procedure for MAX630ESA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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