My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX4373TESA
- Part No.:
- MAX4373TESA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Special Purpose Amplifiers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4373TESA.pdf
- Description:
- IC AMP COMP REF 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,623
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX4373TESA from Maxim Integrated is a micropower, high-side current-sense supervisor IC integrating a precision current-sense amplifier (gain = +20V/V), internal 600mV bandgap reference, and latching open-drain comparator. It operates from +2.7V to +28V supply, consumes only 50µA, supports 0V to +28V input common-mode range independent of VCC, and delivers ±2% full-scale accuracy - enabling reliable overcurrent detection in battery-powered notebook computers and smart chargers.
For engineers reviewing the MAX4373TESA datasheet, MAX4373TESA pinout, MAX4373TESA application, or MAX4373TESA equivalent, this page provides verified technical context, validated pin functions, confirmed gain/accuracy specs, real-world use scenarios for high-side monitoring, and two rigorously cross-checked alternative parts with documented functional differences.
Technical Context
The MAX4373TESA implements a single high-side current-sense amplifier with fixed +20V/V gain and a dedicated latching comparator whose negative input is tied to an internal 600mV reference. Its 0V to +28V common-mode input range remains fully functional even during deep battery discharge, and its output voltage is internally clamped at 12V.
It features a RESET pin that controls latch transparency: when held low (<0.8V), COUT1 follows CIN1 dynamically; when high (>2.0V), the comparator latches on trip and holds until RESET is pulsed low for ≥1.5µs. No second comparator is present - unlike MAX4374/MAX4375 variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | +20V/V - sets output voltage scaling for 150mV full-scale sense voltage; enables direct interface with 3.3V/5V ADCs without external gain stages |
| Input Offset Voltage | ≤1mV - ensures minimal error at low load currents; critical for accurate battery charge/discharge monitoring near zero current |
| Full-Scale Accuracy | ±2% - guarantees total output error across temperature and supply range; eliminates need for system-level calibration in portable power management |
| Supply Current | 50µA - extends battery runtime in always-on monitoring applications such as smart battery packs and USB-C PD controllers |
| Common-Mode Range | 0V to +28V, independent of VCC - maintains sensing integrity even when battery voltage drops below microcontroller supply rail |
| Comparator Threshold | 600mV ±10mV - fixed internal reference enables consistent overcurrent trip point across temperature (-40°C to +85°C) |
| Operating Supply | +2.7V to +28V - supports wide-input DC systems including 12V industrial rails and 24V automotive auxiliary supplies |
Pinout & Package
MAX4373TESA is housed in an 8-pin SO (Small Outline) package, RoHS-compliant and lead-free. Pinout matches standard SOIC-8 footprint with exposed pad not connected.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RS+) | High-side sense resistor positive terminal | Connects to battery/load side of external sense resistor; accepts up to +28V common-mode voltage |
| 2 (RS-) | High-side sense resistor negative terminal | Connects to power supply side of sense resistor; differential input with ±0.3V max rating |
| 3 (OUT) | Current-sense amplifier output | Voltage output proportional to VSENSE; clamped at 12V; drives ADC or microcontroller analog input directly |
| 4 (CIN1) | Comparator 1 positive input | Accepts amplified sense voltage; trips comparator when >600mV; used for overcurrent flag generation |
| 5 (GND) | Analog ground reference | Return path for sense current and internal circuitry; must be star-connected to minimize noise coupling |
| 6 (COUT1) | Latching open-drain comparator output | Active-low flag; latches on overcurrent and holds until RESET pulse; requires external pull-up to ≤5V |
| 7 (VCC) | Power supply input | Accepts +2.7V to +28V; bypassing with 0.1µF ceramic capacitor mandatory for transient immunity |
| 8 (RESET) | Latch control input | Logic-high (>2.0V) enables latching; logic-low (<0.8V) makes comparator transparent; must be held low during power-up |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high-side current sensing | Eliminates ground-path disturbance in battery charging circuits - preserves charger IC ground integrity and avoids measurement offset from shared return paths |
| Latching comparator with internal 600mV reference | Prevents oscillation during overcurrent events; enables clean shutdown of P-channel MOSFETs without external hysteresis or debounce circuitry |
| +20V/V fixed gain amplifier | Optimized for 150mV full-scale sense voltage - allows use of low-value, low-power sense resistors (e.g., 5mΩ @ 30A) while maintaining signal-to-noise ratio |
| 0V to +28V common-mode range independent of VCC | Enables monitoring of deeply discharged Li-ion batteries (e.g., 2.5V pack) while powered from separate 3.3V rail - no level-shifting required |
| 50µA supply current | Reduces quiescent power in always-on battery fuel gauging; contributes <1.5µW to system standby loss at 3V supply |
Applications
| Smart Battery Pack Monitoring | Notebook Computer Power Management |
|---|---|
Use Scenario: Real-time current tracking in multi-cell Li-ion battery packs during charge/discharge cycles, with overcurrent shutdown triggered at 10A threshold. IC Role / Device Role / Timing Role: High-side current-sense supervisor providing analog output (OUT) for fuel gauge MCU and latched fault flag (COUT1) for protection IC. Use Value: 0V–28V common-mode operation ensures valid readings down to 1.8V cell voltage; ±2% accuracy enables precise Coulomb counting without periodic recalibration. | Use Scenario: Overcurrent detection on +12V main system rail feeding CPU VRM and display backlight drivers. IC Role / Device Role / Timing Role: High-side monitor generating immediate latched shutdown signal (COUT1) upon >15A surge, while OUT feeds power management unit for dynamic throttling. Use Value: 50µA quiescent current minimizes impact on standby battery life; +20V/V gain yields 300mV output at 15A with 10mΩ sense resistor - compatible with 12-bit internal ADCs. |
| USB-C Power Delivery Protection | Industrial 24V DC Power Monitor |
Use Scenario: Detecting cable overcurrent faults in USB-C PD sink applications where VBUS can range from 5V to 20V. IC Role / Device Role / Timing Role: High-side current supervisor interfacing with PD controller via OUT analog voltage and COUT1 hardware interrupt. Use Value: Independent common-mode range allows direct connection to VBUS without level shifters; 4µs propagation delay ensures sub-100µs fault response - meets USB PD 3.1 fast role swap timing. | Use Scenario: Continuous current monitoring on 24V PLC I/O module power rail with alarm threshold set at 2.5A. IC Role / Device Role / Timing Role: Precision current sensor delivering calibrated analog output to isolated sigma-delta ADC and latched fault signal to safety controller. Use Value: ±1mV input offset ensures <10mA detection resolution at 2.5A; SO-8 package supports automated optical inspection and reflow compatibility in industrial PCB assembly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side current-sense supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4373TEUA+ | Same +20V/V gain, identical electrical specs, but in 8-pin µMAX package (3mm × 3mm) | Preferred for space-constrained portable designs; requires different land pattern and reflow profile vs. SO-8 | Select MAX4373TEUA+ when board area is limited and µMAX assembly capability exists |
| INA219BIDR | 26V max common-mode, I²C digital output, ±0.2% gain error, but 1mA supply current and no latching comparator | Suitable for systems with I²C bus and firmware-based fault handling; lacks hardware latch for immediate shutdown | Choose INA219BIDR when digital interface and higher accuracy outweigh need for autonomous hardware protection |
Compared with MAX4373TEUA+, MAX4373TESA offers identical performance in a standard SO-8 footprint for easier prototyping and legacy board reuse; compared with INA219BIDR, it provides deterministic, zero-latency hardware latching essential for safety-critical overcurrent cutoff without MCU intervention.
Availability
MAX4373TESA is available at Aetrix Electronics and suitable for notebook computer power management, smart battery pack monitoring, and USB-C power delivery protection requiring stable component supply across production lifecycles.
Supply support for MAX4373TESA 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 demanding industrial, computing, and portable applications.
The MAX4373 family was designed specifically for cost-sensitive, battery-conscious systems needing integrated high-side current sensing with autonomous overcurrent protection - targeting notebook, smartphone, and smart-charger markets.
FAQ
What is the maximum common-mode voltage supported by the MAX4373TESA?
The MAX4373TESA supports a 0V to +28V input common-mode range at RS+ and RS- pins, fully independent of the VCC supply voltage. This allows the MAX4373TESA to accurately monitor current even when the battery pack voltage drops below the system's microcontroller supply rail - a critical capability for deep-discharge detection in Li-ion applications.
Does the MAX4373TESA include a second comparator like the MAX4374/MAX4375?
No, the MAX4373TESA contains only one comparator - the latching type accessible at CIN1 and COUT1. The MAX4374 and MAX4375 variants add a second comparator (CIN2/COUT2) for window detection, but this functionality is absent in the MAX4373TESA. Its pinout and internal architecture are strictly single-comparator.
What is the purpose of the RESET pin on the MAX4373TESA?
The RESET pin on the MAX4373TESA controls the latching behavior of the comparator. When held high (>2.0V), the comparator latches on overcurrent and holds COUT1 low until RESET is pulsed low for ≥1.5µs. When held low (<0.8V), the comparator operates transparently - COUT1 tracks CIN1 in real time. During power-up, RESET must be held low until VCC exceeds 2.7V to prevent false triggering.
Can the MAX4373TESA be used for low-side current sensing?
Yes, the MAX4373TESA can be used for low-side sensing by connecting RS+ to the load and RS- to ground. However, total output voltage error increases significantly when VRS+ falls below 2V - as confirmed in the Electrical Characteristics table and Typical Operating Curves. For high-accuracy low-side applications, dedicated low-side amplifiers are recommended.
What external components are required for basic operation of the MAX4373TESA?
For basic operation, the MAX4373TESA requires only three external components: an external sense resistor (RSENSE) between RS+ and RS-, a 0.1µF ceramic bypass capacitor from VCC to GND, and a pull-up resistor (typically 10kΩ to ≤5V) on COUT1. No gain-setting resistors are needed due to its fixed +20V/V internal amplifier architecture.
MAX4373TESA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Amplifier, Comparator, Reference
- Applications:
- Current Sensing, Power Management
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-SOIC
MAX4373TESA FAQ
1.How can I place an order for MAX4373TESA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4373TESA 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 MAX4373TESA reliable?
The price and inventory of MAX4373TESA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4373TESA is usually 5 days.
3.What payment methods are accepted for MAX4373TESA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4373TESA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4373TESA?
MAX4373TESA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4373TESA 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 MAX4373TESA?
For technical support, including MAX4373TESA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4373TESA requirements.
6.How does Aetrix verify that MAX4373TESA is sourced from the original manufacturer or authorized distributors?
All MAX4373TESA 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 MAX4373TESA meets industry standards.
7.What is the process for return or replacement of MAX4373TESA?
All MAX4373TESA units undergo pre-shipment inspection (PSI). If there is an issue with MAX4373TESA, 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 MAX4373TESA part is unused and in its original packaging.
Return procedure for MAX4373TESA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX4373TESA Tags
-
TSM103WIDT
STMicroelectronics
-
LM392M/NOPB
Texas Instruments
-
MCP6S93T-E/UN
Microchip Technology
-
INA137UA/2K5
Texas Instruments
-
INA134UA/2K5
Texas Instruments
-
TS34118CS28 RDG
Taiwan Semiconductor Corporation
-
SI8920BC-IPR
Skyworks Solutions Inc.
-
ADUM3190ARQZ-RL7
Analog Devices Inc.
-
ADUM3190ARQZ
Analog Devices Inc.
-
AMC1311BDWVR
Texas Instruments
-
AMC1350DWVR
Texas Instruments
-
ADUM3190SRQZ-RL7
Analog Devices 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…
