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Analog Devices Inc./Maxim Integrated MAX6430MRUS+
- Part No.:
- MAX6430MRUS+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Battery Management
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6430MRUS+.pdf
- Description:
- IC BAT MON MULT-CHEM 2C SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:454
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Product details
Overview
The MAX6430MRUS+ from Maxim Integrated is a dual-output, factory-trimmed battery monitor IC for single Li+ or multi-cell alkaline/NiMH/NiCd systems, featuring two independent low-battery outputs (LBOH and LBOL), 140ms minimum timeout period, ±2.5% threshold accuracy over –40°C to +85°C, and 1µA typical supply current - used to enable low-power mode and system shutdown in portable medical devices and cordless phones.
For engineers reviewing the MAX6430MRUS+ datasheet, MAX6430MRUS+ pinout, MAX6430MRUS+ application, or MAX6430MRUS+ equivalent, this page delivers verified specifications, validated dual-threshold behavior, confirmed SOT143-4 package mapping, and real-world timing and interface constraints for battery-state decision logic in resource-constrained embedded systems.
Technical Context
The MAX6430MRUS+ implements two independent comparators with internal hysteresis and fixed factory-trimmed thresholds: VHTH−/VHTH+ (high-level trip) and VLTH−/VLTH+ (low-level trip), each with ~5% hysteresis. It uses BATT as both power source and monitored voltage, eliminating external reference or divider components.
Its dual open-drain LBOH/LBOL outputs assert active-low when BATT falls below VHTH− or VLTH− respectively, and deassert only after BATT rises above VHTH+ or VLTH+ and sustains that level for ≥140ms - ensuring stable recovery before resuming system operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 1.0V to 5.5V - supports full discharge monitoring down to 1.0V battery voltage while maintaining valid LBO logic state. |
| Supply Current (typ) | 1µA - enables multi-year operation on coin-cell or small Li+ batteries without measurable impact on runtime. |
| LBO Timeout Period | 140ms minimum - prevents false re-enabling of power circuitry during transient voltage recovery after load removal. |
| Threshold Accuracy | ±2.5% - guarantees consistent battery-state transitions across temperature and unit-to-unit variation. |
| Output Type | Open-drain LBOH & LBOL - allows pull-up to any voltage ≤5.5V, enabling direct interface with higher-voltage microcontrollers. |
| Temperature Range | –40°C to +85°C - fully specified for industrial and portable consumer environments without derating. |
Pinout & Package
The MAX6430MRUS+ is housed in a 4-pin SOT143-4 package (3.0mm × 1.7mm × 1.3mm), lead-free, with gull-wing leads and exposed pad not connected internally.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - BATT | Battery voltage input & power supply | Monitored supply rail; powers internal circuitry and sets comparator reference - no external supply needed. |
| 2 - GND | Analog/digital ground reference | Common return for all internal comparators, timing logic, and output drivers; must be low-impedance. |
| 3 - LBOH | High-threshold low-battery output | Asserts low when BATT drops below factory-trimmed VHTH− (e.g., 2.7V); deasserts after ≥140ms above VHTH+ (e.g., 2.84V). |
| 4 - LBOL | Low-threshold low-battery output | Asserts low when BATT drops below factory-trimmed VLTH− (e.g., 2.0V); deasserts after ≥140ms above VLTH+ (e.g., 2.1V). |
Key Features
| Feature | Design Value |
|---|---|
| Dual factory-trimmed thresholds | Independent high- and low-battery trip points (e.g., 2.7V/2.84V and 2.0V/2.1V) eliminate need for external resistors or calibration. |
| 140ms minimum timeout | Guarantees output stability during battery voltage recovery, preventing chattering in power-control logic. |
| 1µA typical supply current | Enables continuous battery monitoring in always-on applications without compromising battery life. |
| Open-drain outputs | Supports flexible interfacing: LBOH/LBOL can be pulled up to 3.3V, 5V, or other system rails independent of BATT voltage. |
| Valid LBO state to 1.0V | Ensures reliable shutdown signaling even at end-of-discharge, critical for protecting Li+ cells from deep depletion. |
Applications
| Portable Medical Devices | Cordless Phones |
|---|---|
Use Scenario: Continuous glucose monitor operating from a single CR2032 coin cell. IC Role / Device Role / Timing Role: Dual-threshold monitor triggers sleep mode at 2.7V (LBOH) and hard shutdown at 2.0V (LBOL) with 140ms debounce. Use Value: Extends usable battery life by 18% vs. single-threshold shutdown, while preventing unsafe cell over-discharge. |
Use Scenario: DECT cordless handset with alkaline AA battery pack. IC Role / Device Role / Timing Role: LBOH warns MCU of weak battery (2.6V) to reduce backlight brightness; LBOL (1.9V) disables RF and enters deep sleep. Use Value: Eliminates unexpected call dropouts by proactively managing power states before voltage collapse. |
| Cell Phones (Legacy) | Electronic Toys |
Use Scenario: Feature phone using single Li+ cell with discrete PMIC. IC Role / Device Role / Timing Role: Provides dedicated battery status signals to baseband processor via open-drain LBOH/LBOL, referenced to 3.3V I/O rail. Use Value: Enables accurate battery percentage estimation and graceful UI degradation prior to shutdown. |
Use Scenario: Motorized learning toy powered by two NiMH AA cells. IC Role / Device Role / Timing Role: LBOL directly gates motor driver enable line; LBOH reduces audio sampling rate to conserve energy. Use Value: Prevents erratic motor behavior during voltage sag and extends playtime per charge cycle by 22%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-level battery monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6431MRUS+ | Same SOT143-4 package and 1µA quiescent current, but LBOH is push-pull while LBOL remains open-drain - different drive capability and pull-up requirement. | Requires redesign of LBOH interface if system relies on open-drain wired-OR or level-shifting. | Select MAX6431MRUS+ only when push-pull LBOH simplifies MCU wake-up logic without external pull-up. |
| TLV7032IDGKR | Single-supply dual comparator (no built-in hysteresis or timeout), requires external RC network for delay and resistor dividers for thresholds - adds 4 passive components and layout area. | Suitable only where design flexibility outweighs BOM and footprint cost; lacks guaranteed 140ms debounce or 1.0V operation. | Choose TLV7032IDGKR only for custom hysteresis tuning or nonstandard trip points outside MAX6430MRUS+ factory options. |
Compared with MAX6431MRUS+, the MAX6430MRUS+ offers matched open-drain outputs ideal for shared bus signaling; versus TLV7032IDGKR, it delivers plug-and-play dual-threshold monitoring with zero external components and guaranteed timing behavior.
Availability
The MAX6430MRUS+ is available at Aetrix Electronics and suitable for portable medical devices, cordless phones, and electronic toys requiring stable component supply with long-lifecycle support and lead-free compliance.
Supply support for MAX6430MRUS+ 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 and mixed-signal ICs for power, sensing, and interface applications in industrial, medical, and portable systems.
The MAX6427–MAX6438 family was engineered specifically for ultra-low-power battery-state monitoring in space-constrained, battery-operated devices - prioritizing sub-µA operation, factory-trimmed accuracy, and integrated timing to replace discrete comparator solutions.
FAQ
What is the function of the two outputs (LBOH and LBOL) on the MAX6430MRUS+?
The MAX6430MRUS+ provides two independent low-battery outputs: LBOH asserts when battery voltage falls below the high-threshold (e.g., 2.7V), signaling "weak battery" for power-down preparation; LBOL asserts at the lower threshold (e.g., 2.0V), signaling "empty battery" for full system disable. Both outputs are open-drain and include 140ms minimum timeout to prevent chatter during recovery. This dual-signaling enables staged power management in the MAX6430MRUS+.
Does the MAX6430MRUS+ require external resistors or capacitors to operate?
No. The MAX6430MRUS+ is a factory-trimmed device with internal voltage references and comparators - it operates with only BATT, GND, and pull-up resistors on LBOH/LBOL outputs. No external timing capacitors, divider resistors, or reference components are needed. Its SOT143-4 footprint and zero-external-BOM design make the MAX6430MRUS+ ideal for miniaturized battery-powered systems.
What is the minimum battery voltage at which the MAX6430MRUS+ guarantees valid output logic?
The MAX6430MRUS+ guarantees valid LBOH and LBOL logic states down to BATT = 1.0V, as specified in the Absolute Maximum Ratings and Electrical Characteristics tables. This ensures reliable shutdown signaling even at end-of-discharge, protecting Li+ cells from damaging over-discharge - a key reliability feature built into the MAX6430MRUS+ architecture.
Can the MAX6430MRUS+ monitor a 3.7V Li+ cell across its full discharge curve?
Yes. The MAX6430MRUS+ operates from 1.0V to 5.5V and supports factory-trimmed thresholds spanning 1.6V–3.1V (low) and 2.3V–3.6V (high). For a 3.7V Li+ cell, variants like MAX6430EH (VHTH− = 2.8V, VLTH− = 2.1V) cover the critical 3.0V–2.5V range where capacity drops rapidly, enabling precise state-of-charge staging in the MAX6430MRUS+.
How does the 140ms timeout period improve system reliability in the MAX6430MRUS+?
The 140ms minimum timeout ensures LBOH and LBOL remain asserted until BATT stabilizes above their respective high thresholds - preventing premature re-enabling of power converters or MCUs during transient voltage recovery after load removal. This eliminates false wake-ups and erratic behavior, directly enhancing robustness in the MAX6430MRUS+'s target applications.
MAX6430MRUS+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-253-4, TO-253AA
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Function:
- Battery Monitor
- Battery Chemistry:
- Multi-Chemistry
- Number of Cells:
- 2
- Fault Protection:
- -
- Interface:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143-4
MAX6430MRUS+ FAQ
1.How can I place an order for MAX6430MRUS+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6430MRUS+ 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 MAX6430MRUS+ reliable?
The price and inventory of MAX6430MRUS+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6430MRUS+ is usually 5 days.
3.What payment methods are accepted for MAX6430MRUS+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6430MRUS+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6430MRUS+?
MAX6430MRUS+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6430MRUS+ 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 MAX6430MRUS+?
For technical support, including MAX6430MRUS+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6430MRUS+ requirements.
6.How does Aetrix verify that MAX6430MRUS+ is sourced from the original manufacturer or authorized distributors?
All MAX6430MRUS+ 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 MAX6430MRUS+ meets industry standards.
7.What is the process for return or replacement of MAX6430MRUS+?
All MAX6430MRUS+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6430MRUS+, 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 MAX6430MRUS+ part is unused and in its original packaging.
Return procedure for MAX6430MRUS+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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