My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6428BGUR+T
- Part No.:
- MAX6428BGUR+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Battery Management
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6428BGUR+T.pdf
- Description:
- IC BATT MON MULT-CHEM 1C SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,692
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6428BGUR+T from Maxim Integrated is a factory-trimmed single-output battery monitor IC for Li+ and multi-cell alkaline/NiMH/NiCd systems, featuring 2.7V high-threshold (VHTH), 2.4V low-threshold (VLTH), 140ms LBO timeout, 1µA supply current, and push-pull active-low LBO output - used to trigger low-power mode or system shutdown in portable medical devices and MP3 players.
For engineers reviewing the MAX6428BGUR+T datasheet, MAX6428BGUR+T pinout, MAX6428BGUR+T application, or MAX6428BGUR+T equivalent, this page delivers verified threshold voltages, SOT23-3 package mapping, true dual-level monitoring context, and confirmed alternatives for battery-state signaling in space-constrained, ultra-low-power designs.
Technical Context
The MAX6428BGUR+T implements a precision comparator-based hysteresis architecture with internal 615mV reference, fixed trip points (VHTH = 2.7V ±2.5%, VLTH = 2.4V ±2.5%), and guaranteed valid LBO logic state down to BATT = 1.0V. It operates across -40°C to +85°C without external components.
Its push-pull LBO output drives directly from BATT, supports 3.2mA sink at 4.5V, and features 100µs response delay on threshold breach. Immunity to short voltage transients ensures robust operation during load switching or battery recovery events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 1.0V to 5.5V - supports full discharge monitoring of single Li+ cells and 2–3-cell alkaline/NiMH packs. |
| Supply Current (typ) | 1µA - enables >10-year battery life in always-on monitoring applications like pagers and PDAs. |
| High Threshold (VHTH) | 2.7V ±2.5% - factory-trimmed upper trip point; triggers LBO deassertion after 140ms stabilization. |
| Low Threshold (VLTH) | 2.4V ±2.5% - factory-trimmed lower trip point; asserts LBO when battery drops below this level. |
| LBO Timeout Period | 140ms minimum - prevents false wake-up by enforcing stable voltage recovery before enabling MCU or power converter. |
| Output Type | Push-pull active-low - eliminates need for external pull-up; interfaces directly with microcontroller NMI or reset inputs. |
| Operating Temperature | -40°C to +85°C - fully specified for industrial and portable consumer environments. |
Pinout & Package
MAX6428BGUR+T is housed in a lead-free 3-pin SOT23-3 package (JEDEC MO-178AA), footprint-compatible with industry-standard 3-pin SOT-23 layouts and optimized for PCB area < 2.5 mm².
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | BATT | Battery-voltage input and primary power supply; monitors voltage and powers internal circuitry. |
| 2 | LBO | Active-low push-pull output; sinks current when asserted (battery weak); drives MCU NMI or enable logic directly. |
| 3 | GND | Analog/digital ground reference; must be connected to system common ground for accurate threshold sensing. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed thresholds | 2.7V/2.4V pair with ±2.5% tolerance - eliminates resistor-divider design effort and calibration overhead. |
| Ultra-low quiescent current | 1µA typical - extends shelf life and runtime in battery-backed SRAM, real-time clocks, and sensor nodes. |
| Guaranteed LBO validity to 1.0V | Functional output assertion down to BATT = 1.0V - enables full-depth discharge monitoring of alkaline cells. |
| 140ms minimum timeout | Hardware-enforced delay prevents chattering during transient dips or battery recovery after load removal. |
| No external components required | Self-contained monitoring solution - reduces BOM count, layout area, and qualification testing scope. |
Applications
| Portable Medical Devices | MP3 Players |
|---|---|
Use Scenario: Continuous glucose monitor powered by single Li+ cell operating in field conditions with variable temperature and load profiles. IC Role / Device Role / Timing Role: Battery monitor IC asserting LBO to trigger sleep mode before critical brownout, preserving data integrity and enabling safe shutdown. Use Value: Prevents unexpected power loss during measurement cycles using factory-trimmed 2.4V/2.7V thresholds and 140ms hysteresis guardband. |
Use Scenario: Flash-based audio player using two alkaline cells, requiring graceful power-down before audible distortion or file corruption. IC Role / Device Role / Timing Role: Single-output voltage monitor driving MCU reset line via push-pull LBO to halt playback and save position. Use Value: 1µA supply current extends playback time; guaranteed LBO operation down to 1.0V captures full cell discharge curve. |
| Cell Phones | Pagers |
Use Scenario: Feature phone with removable Li+ battery and legacy PMIC, needing precise low-battery warning before forced shutdown. IC Role / Device Role / Timing Role: Dedicated battery status indicator interfacing with baseband processor's interrupt pin via active-low LBO. Use Value: Push-pull output eliminates pull-up resistor; 2.4V trip point aligns with standard Li+ end-of-discharge voltage per IEC 62133. |
Use Scenario: Two-way pager using three NiMH cells in harsh industrial environments with frequent vibration-induced contact bounce. IC Role / Device Role / Timing Role: Low-power supervisor asserting LBO to disable RF section and enter deep sleep when voltage falls below 2.4V. Use Value: Immunity to short transients prevents false alerts; 140ms timeout filters mechanical noise while retaining responsiveness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery-monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6427CGUR+T | Lower thresholds: VHTH = 2.6V, VLTH = 2.3V - tighter hysteresis window (300mV vs. 300mV), same 1µA current and SOT23-3 package. | Suitable for systems requiring earlier low-battery alert, e.g., devices with higher standby current or aggressive power gating. | Select MAX6427CGUR+T when 2.3V/2.6V trip points better match your battery's discharge knee under load. |
| TLV7031DBVR | General-purpose comparator (not battery monitor); requires external resistors, reference, and timing RC network to replicate function - no built-in hysteresis or timeout. | Used only where design flexibility justifies added BOM, layout area, and validation effort; not drop-in. | Choose TLV7031DBVR only if custom threshold tuning, wider voltage range (up to 5.5V), or adjustable timeout are mandatory requirements. |
Compared with MAX6428BGUR+T, MAX6427CGUR+T offers identical architecture and form factor but shifts thresholds downward for earlier warning, while TLV7031DBVR demands full external circuit design to achieve comparable functionality - increasing risk, cost, and time-to-market.
Availability
MAX6428BGUR+T is available at Aetrix Electronics and suitable for portable medical devices, MP3 players, and pagers requiring stable component supply, long-lifecycle support, and lead-free compliance.
Supply support for MAX6428BGUR+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 analog and mixed-signal ICs for power, sensing, and interface applications.
The MAX6427–MAX6438 family was designed specifically for ultra-low-power battery-state monitoring in space-constrained portable electronics, delivering factory-trimmed accuracy without external components.
FAQ
What is the exact factory-trimmed threshold voltage pair for MAX6428BGUR+T?
The MAX6428BGUR+T has a factory-trimmed high threshold (VHTH) of 2.7V ±2.5% and low threshold (VLTH) of 2.4V ±2.5%, corresponding to the "BG" option in Table 1 of the datasheet. These values are laser-trimmed during production and require no external calibration. The 300mV hysteresis ensures reliable transition between normal and low-power modes without oscillation.
Does MAX6428BGUR+T support operation down to 1.0V battery voltage?
Yes, MAX6428BGUR+T guarantees valid LBO logic state down to BATT = 1.0V, enabling full discharge monitoring of alkaline and NiMH cells. Its internal circuitry remains functional and the push-pull LBO output asserts correctly even at this voltage, provided the supply current stays within spec - a key differentiator versus many competing supervisors.
What package type and footprint does MAX6428BGUR+T use?
MAX6428BGUR+T uses a lead-free 3-pin SOT23-3 package (JEDEC MO-178AA), with pin 1 = BATT, pin 2 = LBO, pin 3 = GND. It shares footprint compatibility with standard SOT-23 discrete transistors and other 3-pin supervisors, simplifying layout reuse and assembly.
Can MAX6428BGUR+T replace MAX6427DHUR+T in an existing design?
MAX6428BGUR+T is not a direct replacement for MAX6427DHUR+T due to differing thresholds: MAX6427DHUR+T uses 3.4V/3.1V, while MAX6428BGUR+T uses 2.7V/2.4V. Swapping them would shift low-battery detection earlier in the discharge curve. Verify system behavior under load before substitution - both share identical pinout and electrical specs otherwise.
Is an external pull-up resistor required for the LBO output of MAX6428BGUR+T?
No, MAX6428BGUR+T features a push-pull LBO output, eliminating the need for an external pull-up resistor. The output actively drives high (to BATT) when deasserted and sinks current when asserted (low). This simplifies interface with microcontrollers, reduces component count, and improves noise immunity compared to open-drain alternatives.
MAX6428BGUR+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- 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
MAX6428BGUR+T FAQ
1.How can I place an order for MAX6428BGUR+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6428BGUR+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 MAX6428BGUR+T reliable?
The price and inventory of MAX6428BGUR+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6428BGUR+T is usually 5 days.
3.What payment methods are accepted for MAX6428BGUR+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6428BGUR+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6428BGUR+T?
MAX6428BGUR+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6428BGUR+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 MAX6428BGUR+T?
For technical support, including MAX6428BGUR+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6428BGUR+T requirements.
6.How does Aetrix verify that MAX6428BGUR+T is sourced from the original manufacturer or authorized distributors?
All MAX6428BGUR+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 MAX6428BGUR+T meets industry standards.
7.What is the process for return or replacement of MAX6428BGUR+T?
All MAX6428BGUR+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6428BGUR+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 MAX6428BGUR+T part is unused and in its original packaging.
Return procedure for MAX6428BGUR+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6428BGUR+T Tags
-
BQ29700DSER
Texas Instruments
-
S-8241ABKMC-GBKT2G
ABLIC Inc.
-
S-8241ABPMC-GBPT2G
ABLIC Inc.
-
BQ27427YZFR
Texas Instruments
-
BQ27426YZFR
Texas Instruments
-
STC3117IJT
STMicroelectronics
-
STC3115IJT
STMicroelectronics
-
BQ76925RGER
Texas Instruments
-
NPM1100-QDAA-R
Nordic Semiconductor ASA
-
BQ27441DRZR-G1A
Texas Instruments
-
STC3115AIQT
STMicroelectronics
-
S-8252AAL-M6T1U
ABLIC Inc.
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
