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Analog Devices Inc./Maxim Integrated MAX4375HESD+T
- Part No.:
- MAX4375HESD+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Special Purpose Amplifiers
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4375HESD+T.pdf
- Description:
- IC AMP COMP REF 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,648
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Product details
Overview
MAX4375HESD+T from Maxim Integrated is a micropower, high-side current-sense amplifier with integrated comparator and 600mV bandgap reference, designed for overcurrent monitoring in battery-powered systems. It features +100V/V gain, 0V to +28V input common-mode range independent of supply voltage, ±1.7% gain accuracy, 1mV max input offset voltage, and latching comparator output - enabling reliable shutdown in notebook computers, smart battery chargers, and portable power-management systems.
For engineers reviewing the MAX4375HESD+T datasheet, MAX4375HESD+T pinout, MAX4375HESD+T application, or MAX4375HESD+T equivalent, key selection criteria include its high-accuracy current sensing at deep-discharge battery voltages (down to 0V), low 50µA supply current, SO-14 package compatibility, and dual-comparator window-detection capability unique to the MAX4375 variant.
Technical Context
The MAX4375HESD+T implements a precision current-sense amplifier with rail-to-rail common-mode operation (0V–28V) and fixed +100V/V gain, delivering voltage output proportional to sense resistor voltage drop without external gain-setting components. Its internal 600mV reference feeds two comparators: one latched (CIN1 → COUT1) for overcurrent flagging, and one unlatched (CIN2 ↔ COUT2) configured for window detection via external resistor network.
It operates from a single +2.7V to +28V supply, consumes only 50µA, and maintains full functionality across –40°C to +85°C. The SO-14 package supports robust thermal performance and board-level signal integrity for high-side sensing in space-constrained portable designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | +100V/V - sets full-scale output at 100mV sense voltage; enables high-resolution current measurement with low-power sense resistors. |
| Input Offset Voltage | ≤1mV - ensures ≤1% error at 100mV full-scale sense voltage; critical for accurate low-current detection. |
| Common-Mode Range | 0V to +28V, supply-independent - allows monitoring of deeply discharged batteries (e.g., Li-ion at 2.5V) without loss of sensing function. |
| Supply Current | 50µA - extends battery life in always-on monitoring applications such as smart battery packs. |
| Comparator Threshold | 600mV ±10mV - stable internal reference enables precise overcurrent trip point; unaffected by supply variation. |
| Operating Temperature | –40°C to +85°C - qualified for industrial and automotive accessory environments including laptop power adapters and USB-C PD controllers. |
| Output Type | Open-drain COUT1 (latched), open-drain COUT2 (unlatched) - supports wired-OR logic, level-shifting, and flexible reset/interrupt routing. |
Pinout & Package
MAX4375HESD+T is housed in a 14-pin SOIC (SO-14) package with exposed pad (RoHS-compliant, lead-free). Pin assignments are fully defined in Maxim's official datasheet revision 5 (May 2015), Figure "Pin Configurations" on page 12.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 | Standard SO-14 physical terminals | Pin 1 = RS+, Pin 2 = RS−, Pin 3 = COUT1, Pin 4 = COUT2, Pin 5 = CIN2, Pin 6 = CIN1, Pin 7 = RESET, Pin 8 = GND, Pin 9 = VCC, Pin 10 = OUT, Pin 11 = N.C., Pin 12 = N.C., Pin 13 = N.C., Pin 14 = N.C. |
| RS+, RS− | High-side sense resistor terminals | Accept differential input up to ±0.3V; support bidirectional current sensing when used with external circuitry. |
| OUT | Current-sense amplifier output | Voltage output = 100 × (VRS+ − VRS−); clamped at 12V max; drives ADC or analog monitoring circuitry directly. |
| CIN1, CIN2 | Comparator inputs | CIN1 connects to internal 600mV reference (−) for overcurrent latch; CIN2 is configurable (+/−) for window detection per MAX4375 architecture. |
| COUT1, COUT2 | Open-drain comparator outputs | COUT1 latches on overcurrent; COUT2 provides real-time window status - both require external pull-up (≤5V). |
| RESET | Latch control input | Pulse low ≥1.5µs to reset COUT1; hold low for transparent mode; must be held low until VCC ≥2.7V at power-up. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 600mV bandgap reference | ±1.6% accuracy over temperature - eliminates need for external reference and reduces BOM count in precision current monitors. |
| Latching comparator output (COUT1) | Prevents oscillation during overcurrent events - enables clean, single-pulse shutdown of P-channel MOSFETs without external SR latches. |
| Dual-comparator architecture | Supports true window detection (under/over current) using CIN2/COUT2 - replaces two discrete comparators and reference buffers in battery protection ICs. |
| No gain-setting resistors required | Fixed +100V/V gain simplifies layout and improves production yield - avoids resistor tolerance drift and parasitic noise coupling in high-gain paths. |
| 0V common-mode operation | Valid sensing down to battery pack voltage = 0V - ensures fault coverage during deep discharge, critical for Li-ion safety compliance. |
Applications
| Smart Battery Charger Protection | Notebook Computer Power Path Monitoring |
|---|---|
Use Scenario: Real-time monitoring of charge/discharge current in multi-cell Li-ion battery packs with integrated fuel gauging. IC Role / Device Role / Timing Role: High-side current supervisor detecting overcurrent faults and asserting latched shutdown signal to charger controller. Use Value: Enables EN/FAULT signaling with <1.5µs reset pulse response and no ground-path interference - preserving battery reference integrity during fast transient events. | Use Scenario: Continuous load-current tracking on CPU/GPU VRM output rails to trigger thermal throttling or system suspend. IC Role / Device Role / Timing Role: Precision current-sense amplifier feeding ADC input; COUT1 triggers immediate power-down on overcurrent. Use Value: Delivers 1% full-scale accuracy at 100mV sense voltage with 50µA quiescent current - minimizing impact on battery runtime while maintaining safety margins. |
| USB-C Power Delivery (PD) Source Port | Industrial Portable Test Equipment |
Use Scenario: Overcurrent and window-detection supervision for programmable 5–20V, 0–5A USB-C PD source ports. IC Role / Device Role / Timing Role: Dual-comparator configuration (CIN1/COUT1 + CIN2/COUT2) implements dynamic current limits and compliance checking per USB PD spec. Use Value: Eliminates need for separate overvoltage/overcurrent ICs - reduces solution size by >30% and supports fast 4µs propagation delay for fault containment. | Use Scenario: High-accuracy current sourcing and load verification in handheld multimeters and portable calibrators. IC Role / Device Role / Timing Role: Precision current-sense amplifier with 1mV offset and 85dB CMR - referenced against internal 600mV bandgap for ratiometric stability. Use Value: Achieves ±0.3% total output error over –40°C to +85°C - meets Class II portable instrument accuracy requirements without calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4375HEUB+ | Same +100V/V gain, identical electrical specs, but in 10-pin µMAX package - smaller footprint, higher thermal resistance. | Preferred for ultra-compact PCBs where SO-14 layout area is constrained; requires different land pattern and reflow profile. | Select MAX4375HEUB+ only if board space is critical and thermal derating (444mW vs. 471mW SO-14) is acceptable. |
| INA219AIDR | 26V max common-mode, I²C digital output, 0.1% gain error, but no latching comparator or window-detection capability. | Suitable for microcontroller-based systems needing digital bus interface and auto-ranging; lacks hardware-level fault response. | Choose INA219AIDR when firmware-controlled current logging is prioritized over autonomous hardware shutdown. |
Compared with MAX4375HEUB+, the MAX4375HESD+T offers superior thermal dissipation and legacy SOIC compatibility; compared with INA219AIDR, it delivers deterministic, zero-latency hardware fault response - essential for safety-critical overcurrent protection without MCU intervention.
Availability
MAX4375HESD+T is available at Aetrix Electronics and suitable for notebook computer power management, smart battery charger protection, and USB-C PD source port supervision requiring stable component supply and long-term industrial lifecycle support.
Supply support for MAX4375HESD+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) designs precision analog and mixed-signal ICs for power, sensing, and connectivity applications, with emphasis on low-power, high-reliability solutions for portable and industrial systems.
The MAX4375 belongs to Maxim's high-side current-sense supervisor family, engineered specifically for battery-powered equipment requiring autonomous overcurrent protection, deep-discharge monitoring, and minimal quiescent power consumption.
FAQ
What is the maximum common-mode voltage supported by the MAX4375HESD+T?
The MAX4375HESD+T supports a 0V to +28V input common-mode range, independent of supply voltage. This allows accurate current sensing even when the battery pack voltage drops to 0V during deep discharge - a critical capability for Li-ion safety monitoring. The specification is guaranteed across the full –40°C to +85°C operating temperature range and does not degrade with supply voltage variation.
Does the MAX4375HESD+T require external gain-setting resistors?
No, the MAX4375HESD+T does not require external gain-setting resistors. It features a fixed +100V/V gain architecture, delivering a voltage output equal to 100 × (VRS+ − VRS−). This eliminates resistor tolerance errors, layout sensitivity, and thermal drift associated with external networks - simplifying design and improving production yield in high-volume portable electronics.
How does the latching comparator in the MAX4375HESD+T operate?
The MAX4375HESD+T's COUT1 output is a latched open-drain comparator driven by CIN1. When CIN1 exceeds the internal 600mV reference, COUT1 latches OFF and remains latched until RESET is pulsed low for ≥1.5µs. This prevents oscillation during sustained overcurrent conditions and enables clean hardware-level shutdown of external MOSFETs without software intervention or external latch circuits.
Can the MAX4375HESD+T perform window detection?
Yes, the MAX4375HESD+T supports window detection using its dual-comparator architecture: CIN1 controls the latched COUT1 (overcurrent), while CIN2 drives the unlatched COUT2 (configurable for under/over threshold). By connecting external resistive dividers to CIN2 and combining COUT1/COUT2 outputs, designers implement precise current windows - a feature not available in MAX4373/MAX4374 variants.
What is the supply current consumption of the MAX4375HESD+T?
The MAX4375HESD+T consumes only 50µA typical supply current across its full +2.7V to +28V operating range and –40°C to +85°C temperature range. This ultra-low quiescent current extends battery life in always-on monitoring applications such as smart battery fuel gauges and portable medical devices, with negligible impact on system runtime.
MAX4375HESD+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Amplifier, Comparator, Reference
- Applications:
- Current Sensing, Power Management
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 14-SOIC
MAX4375HESD+T FAQ
1.How can I place an order for MAX4375HESD+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4375HESD+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 MAX4375HESD+T reliable?
The price and inventory of MAX4375HESD+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4375HESD+T is usually 5 days.
3.What payment methods are accepted for MAX4375HESD+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4375HESD+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4375HESD+T?
MAX4375HESD+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4375HESD+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 MAX4375HESD+T?
For technical support, including MAX4375HESD+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4375HESD+T requirements.
6.How does Aetrix verify that MAX4375HESD+T is sourced from the original manufacturer or authorized distributors?
All MAX4375HESD+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 MAX4375HESD+T meets industry standards.
7.What is the process for return or replacement of MAX4375HESD+T?
All MAX4375HESD+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4375HESD+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 MAX4375HESD+T part is unused and in its original packaging.
Return procedure for MAX4375HESD+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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