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Analog Devices Inc./Maxim Integrated MAX6429KTUR-T
- Part No.:
- MAX6429KTUR-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Battery Management
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6429KTUR-T.pdf
- Description:
- IC BATT MON MULT-CHEM 1C SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
MAX6429KTUR-T from Maxim Integrated is a factory-trimmed, single-output, low-power battery monitor IC for Li+ and multi-cell alkaline/NiMH/NiCd systems. It features a fixed low-threshold of 2.8V (±2.5%), high-threshold of 3.0V (±2.5%), 140ms minimum LBO timeout, 1µA typical supply current, and operates from 1.0V to 5.5V. It delivers active-low push-pull LBO output for direct microprocessor NMI or system shutdown control in portable medical devices.
For engineers reviewing the MAX6429KTUR-T datasheet, MAX6429KTUR-T pinout, MAX6429KTUR-T application, or MAX6429KTUR-T equivalent, key selection criteria include its factory-set 2.8V/3.0V hysteresis pair, guaranteed LBO validity down to BATT = 1.0V, immunity to short voltage transients, and SOT23-3 package compatibility with space-constrained battery-powered designs.
Technical Context
The MAX6429KTUR-T implements a dual-comparator architecture with internal 615mV reference, hysteresis timing logic, and push-pull output driver - all integrated into a 3-pin SOT23 package. Its fixed thresholds are laser-trimmed at wafer test, eliminating external resistors and calibration effort.
It monitors battery voltage continuously and asserts LBO when BATT falls below 2.8V; deassertion requires BATT to rise above 3.0V and remain stable for ≥140ms. This timeout prevents false triggers during transient load recovery or battery voltage bounce.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 1 µA typical - enables multi-year operation on coin cells without measurable impact on battery life. |
| Low Threshold (VLTH) | 2.8 V ±2.5% - factory-trimmed trip point for initiating low-power mode in Li+ systems. |
| High Threshold (VHTH) | 3.0 V ±2.5% - factory-trimmed release point ensuring stable re-enablement after recovery. |
| LBO Timeout Period | 140–280 ms - guarantees system only resumes operation after sustained voltage stabilization. |
| Operating Voltage Range | 1.0 V to 5.5 V - supports valid LBO logic state even at end-of-life battery voltage (1.0V). |
| Output Type | Active-low push-pull - drives directly to microprocessor NMI or enable inputs without pull-up resistor. |
| Temperature Range | −40°C to +85°C - fully specified for industrial and portable medical environments. |
Pinout & Package
MAX6429KTUR-T is housed in a 3-pin SOT23-3 package (JEDEC MO-178AA), with 1.3mm × 2.9mm footprint and 1.0mm max height. Pin 1 = BATT, Pin 2 = LBO, Pin 3 = GND - no VDD or threshold-setting pins required due to factory-trimmed architecture.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BATT (Pin 1) | Battery voltage input and power supply | Direct connection to single Li+ cell or 2–3 alkaline/NiMH cells; powers internal circuitry and references LBO output. |
| LBO (Pin 2) | Active-low push-pull low-battery output | Drives microprocessor NMI, system enable, or DC-DC converter SHDN directly; sinks up to 3.2mA at 4.5V. |
| GND (Pin 3) | Analog and digital ground reference | Common return path for BATT supply and LBO output; must be low-impedance to ensure accurate threshold sensing. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed thresholds | 2.8V low / 3.0V high pair eliminates external resistors and calibration, reducing BOM count and layout area. |
| 140ms minimum timeout | Prevents chattering during battery recovery by enforcing minimum hold time before LBO deassertion. |
| 1µA supply current | Enables >10-year shelf life on CR2032 coin cells in always-on monitoring applications. |
| Valid LBO down to 1.0V | Ensures reliable shutdown signaling even at battery end-of-life, critical for data retention and safe power-down. |
| Push-pull LBO output | Eliminates need for external pull-up resistor and supports direct interface to 1.8V–5V logic families. |
Applications
| Portable Medical Monitors | Li+ Battery-Powered PDAs |
|---|---|
|
Use Scenario: Continuous glucose monitor operating on single Li+ cell with strict low-power sleep/wake cycles. IC Role / Device Role / Timing Role: Battery monitor providing early warning (LBO assert) at 2.8V to trigger sleep mode, then releasing at 3.0V after 140ms stability window. Use Value: Prevents unexpected shutdown during sensor sampling; extends usable runtime by enabling graceful transition to ultra-low-power states. |
Use Scenario: Handheld PDA requiring deterministic power management across varying battery discharge curves. IC Role / Device Role / Timing Role: Single-point voltage supervisor generating NMI interrupt to OS upon crossing 2.8V/3.0V hysteresis band. Use Value: Enables OS-level battery state estimation without ADC polling, reducing CPU wake-ups and saving >15% system energy. |
| Wireless Remote Controls | Electronic Toys with Li+ Packs |
|
Use Scenario: Sub-GHz remote with deep-sleep MCU and RF transceiver powered by CR2032 or Li+ pouch cell. IC Role / Device Role / Timing Role: Directly driving MCU reset or enable pin via push-pull LBO to enforce hard power-off below 2.8V. Use Value: Guarantees complete system disable at safe cutoff voltage, preventing memory corruption or brown-out lockup. |
Use Scenario: Educational robotics kit using rechargeable Li+ battery with no user-accessible charge indicator. IC Role / Device Role / Timing Role: Providing audible/visual low-battery alert via LBO-triggered buzzer or LED before full discharge. Use Value: Delivers consistent, non-drifting alert threshold across temperature and aging - no recalibration needed over product lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6428KTUR-T | Factory-trimmed 2.7V/2.9V thresholds (vs. 2.8V/3.0V); identical SOT23-3 package and 1µA current. | Suitable where earlier low-battery warning is preferred - e.g., systems requiring longer grace period before shutdown. | Select MAX6428KTUR-T if design targets 2.7V trip; verify timing behavior under same load profile. |
| TLV7031DBVR | General-purpose comparator (not battery monitor); requires external reference, resistors, and RC timing network for hysteresis and delay. | Used when custom threshold tuning or multi-voltage rail monitoring is needed - not drop-in replacement. | Choose TLV7031DBVR only for designs needing flexible, programmable supervision; adds ≥4 passive components and layout area. |
Compared with MAX6428KTUR-T, the MAX6429KTUR-T provides later assertion (2.8V vs. 2.7V) and higher release (3.0V vs. 2.9V), yielding tighter hysteresis and reduced false alerts in noisy environments; versus TLV7031DBVR, it delivers turnkey supervision with zero external components and guaranteed 140ms timeout.
Availability
MAX6429KTUR-T is available at Aetrix Electronics and suitable for portable medical devices, Li+-powered PDAs, and wireless remote controls requiring stable component supply, long-term lifecycle support, and lead-free compliance.
Supply support for MAX6429KTUR-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 semiconductor company specializing in precision analog, mixed-signal, and power management ICs for industrial, medical, and consumer applications.
The MAX6427–MAX6438 family was designed specifically for ultra-low-power battery state monitoring in space- and cost-constrained portable electronics, delivering factory-calibrated accuracy without external components.
FAQ
What is the exact low-battery threshold voltage for MAX6429KTUR-T?
The MAX6429KTUR-T has a factory-trimmed low-threshold (VLTH) of 2.8V ±2.5%, meaning the LBO output asserts when the BATT voltage falls below 2.73V (min) and deasserts only after BATT rises above 3.0V ±2.5% (2.925V min) and remains stable for ≥140ms. This value is laser-trimmed and does not require external calibration.
Does MAX6429KTUR-T require external resistors or capacitors to operate?
No, MAX6429KTUR-T requires no external components. Its 2.8V/3.0V thresholds, 140ms timeout, and push-pull LBO output are fully integrated. Unlike adjustable variants (e.g., MAX6433), the MAX6429KTUR-T eliminates resistor dividers, timing capacitors, and reference circuits - reducing BOM count and PCB area.
Can MAX6429KTUR-T operate reliably at end-of-life battery voltage?
Yes, MAX6429KTUR-T guarantees valid LBO logic state down to BATT = 1.0V, per its Absolute Maximum Ratings and Electrical Characteristics table. This ensures deterministic shutdown signaling even as the Li+ cell discharges to termination voltage, preventing brown-out or undefined behavior in downstream logic.
What is the output drive capability of the LBO pin on MAX6429KTUR-T?
The LBO pin on MAX6429KTUR-T is a push-pull output capable of sinking up to 3.2mA at 4.5V (VOL ≤ 0.4V) and sourcing 200µA at 1.6V (VOH ≥ 0.8 × VSUPPLY). This allows direct interfacing with microcontroller NMI, enable, or reset inputs across 1.8V–5V logic families without level-shifting or pull-up resistors.
How does the 140ms timeout in MAX6429KTUR-T improve system reliability?
The 140ms minimum timeout in MAX6429KTUR-T enforces a stability window before deasserting LBO, preventing false releases caused by transient voltage spikes during load switching or battery recovery. This ensures microprocessors and DC-DC converters only resume operation after confirmed voltage stabilization - critical for data integrity and power sequencing.
MAX6429KTUR-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Battery Monitor
- Battery Chemistry:
- Multi-Chemistry
- Number of Cells:
- 1
- Fault Protection:
- -
- Interface:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX6429KTUR-T FAQ
1.How can I place an order for MAX6429KTUR-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6429KTUR-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 MAX6429KTUR-T reliable?
The price and inventory of MAX6429KTUR-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6429KTUR-T is usually 5 days.
3.What payment methods are accepted for MAX6429KTUR-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6429KTUR-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6429KTUR-T?
MAX6429KTUR-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6429KTUR-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 MAX6429KTUR-T?
For technical support, including MAX6429KTUR-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6429KTUR-T requirements.
6.How does Aetrix verify that MAX6429KTUR-T is sourced from the original manufacturer or authorized distributors?
All MAX6429KTUR-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 MAX6429KTUR-T meets industry standards.
7.What is the process for return or replacement of MAX6429KTUR-T?
All MAX6429KTUR-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6429KTUR-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 MAX6429KTUR-T part is unused and in its original packaging.
Return procedure for MAX6429KTUR-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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