My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX1931EUB-T
- Part No.:
- MAX1931EUB-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX1931EUB-T.pdf
- Description:
- SWITCH FOR TWO USB PORTS
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX1931EUB-T from Maxim Integrated is a P-channel MOSFET current-limited power switch for single USB port protection, featuring 0.64A–1.06A preset current limit, 60mΩ typical on-resistance, and 10ms fault-blanking timeout. It operates from 2.7V to 5.5V, draws only 14µA quiescent current, and delivers fault signaling via open-drain FAULT pin - ideal for USB hot-plug power management in portable systems.
For engineers reviewing the MAX1931EUB-T datasheet, MAX1931EUB-T pinout, MAX1931EUB-T application, or MAX1931EUB-T equivalent, key selection criteria include guaranteed short-circuit foldback (750mA), thermal shutdown at 165°C, UVLO threshold (2.0V–2.9V), and µMAX-10 package compatibility with space-constrained USB hub and notebook designs.
Technical Context
The MAX1931EUB-T implements a precision current-limit architecture using a replica MOSFET and 1.24V internal reference to regulate output current within ±15% over temperature and supply voltage. Its fault detection logic distinguishes between transient load events (blanked for 10ms) and sustained overcurrent, thermal, or undervoltage faults - each triggering distinct FAULT assertion behavior.
As a unidirectional P-channel switch, it requires VIN > VOUT and integrates thermal shutdown with 20°C hysteresis, enabling auto-recovery cycling under persistent short-circuit conditions. The open-drain FAULT output supports 100kΩ pull-up to IN and asserts low without blanking for die overtemperature or UVLO, but only after timeout for current-limit events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Current Limit Range | 0.64A (min) to 1.06A (max) - sets precise USB-compliant overload threshold with ±15% tolerance over -40°C to +85°C |
| On-Resistance (RON) | 60mΩ (typ), 150mΩ (max) - determines I²R loss and voltage drop at full load; enables <300mV drop at 500mA |
| Fault-Blanking Timeout | 10ms (typ) - suppresses false FAULT assertions during hot-swap transients or power-up, critical for capacitive-load USB ports |
| Supply Voltage Range | 2.7V to 5.5V - supports both 3.3V and 5V system rails without external level-shifting |
| Quiescent Current | 14µA (typ) - minimizes battery drain in always-on USB power switches for portable equipment |
| Thermal Shutdown Threshold | 165°C (fixed) - protects against thermal runaway; auto-recovers after 20°C cooldown |
| UVLO Threshold | 2.0V (min) to 2.9V (max) - disables switch below safe operating voltage to prevent erratic regulation |
Pinout & Package
The MAX1931EUB-T is housed in a 10-pin µMAX package (3mm × 3mm, 0.5mm pitch) with no exposed pad. All IN pins (1,3,9) connect to P-channel source; all OUT pins (2,4,8,10) connect to drain; ON (5) is active-low enable; GND (6); FAULT (7) is open-drain fault indicator.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 9 - IN | P-channel MOSFET source input | Must be tied together and bypassed with ≥1µF ceramic capacitor to GND for stable input voltage during short-circuit events |
| 2, 4, 8, 10 - OUT | P-channel MOSFET drain output | Must be tied together and bypassed with 0.1µF capacitor to GND to suppress negative voltage spikes during turn-off |
| 5 - ON | Active-low switch control | Logic low enables conduction; high-Z or pulled high disables switch; 0.8V/2.0V logic thresholds ensure noise immunity |
| 6 - GND | Analog and power ground reference | Single-point connection required; ties internal bias circuitry and fault comparator reference |
| 7 - FAULT | Open-drain fault indicator | Asserts low for thermal shutdown, UVLO, or sustained (>10ms) current limit; requires 100kΩ pull-up to IN |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed short-circuit foldback | Limits continuous short-circuit current to 750mA max - prevents thermal runaway during sustained OUT-to-GND faults |
| No fault signal during power-up | 10ms blanking timer starts only after ON is asserted - eliminates false FAULT during system boot sequences |
| Accurate internal current-limit reference | 1.24V bandgap reference drives replica-MOSFET sensing - achieves ±15% ILIMIT tolerance across voltage and temperature |
| Low quiescent and shutdown current | 14µA operating / 1µA shutdown - extends battery life in always-connected USB peripherals and docking stations |
| Thermal shutdown with hysteresis | 165°C trip point with 20°C cooldown hysteresis - enables controlled on/off cycling instead of latch-up under persistent overload |
Applications
| USB Port Protection | Notebook Computer Power Switching |
|---|---|
Use Scenario: Hot-plugging USB devices into a powered host port with large downstream capacitance. IC Role / Device Role / Timing Role: Current-limited power switch enforcing USB 2.0 inrush current compliance and preventing bus voltage collapse. Use Value: 10ms fault blanking ignores capacitive inrush peaks while still protecting against true shorts - eliminating false disconnects during plug-in. | Use Scenario: Managing auxiliary USB power rail in thin-and-light notebooks with strict thermal and battery-life constraints. IC Role / Device Role / Timing Role: Low-quiescent, thermally robust power switch for always-on USB charging circuits. Use Value: 14µA IQ and 60mΩ RON reduce standby loss and voltage drop - extending runtime and maintaining 5V regulation under load. |
| Docking Station Load Management | Battery Charger Input Protection |
Use Scenario: Distributing clean, current-limited 5V power to multiple peripheral slots in a USB-C docking station. IC Role / Device Role / Timing Role: Independent per-port power switch with fault isolation and thermal margin. Use Value: Foldback short-circuit current (750mA) limits power dissipation during connector misinsertion - avoiding localized overheating in dense PCB layouts. | Use Scenario: Protecting Li-ion battery charger IC inputs from reverse-current or overcurrent events caused by faulty cables or adapters. IC Role / Device Role / Timing Role: Unidirectional current-limited switch placed between adapter input and charger IC VDD. Use Value: UVLO (2.0V–2.9V) disables switch if input sags below safe regulation range - preventing charger malfunction or battery damage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-limited USB power switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS2051BDBVR | Lower current limit (500mA typ), no fault blanking, higher RON (130mΩ min), 5-pin SOT-23 | Lacks 10ms blanking and thermal shutdown; suited for cost-sensitive, non-hot-swap USB ports | Select when board space is critical and transient fault immunity is not required. |
| AP2171WG-7 | Wider current range (0.8A–1.5A), no integrated UVLO, 6-pin SOT-26 package, 120mΩ RON | Requires external UVLO circuitry; lacks thermal shutdown hysteresis and foldback behavior | Choose for higher current USB 3.0 ports where thermal cycling control is managed externally. |
Compared with TPS2051BDBVR and AP2171WG-7, the MAX1931EUB-T uniquely combines 10ms fault blanking, thermal shutdown with hysteresis, and guaranteed foldback short-circuit current - making it the only option among the three qualified for robust hot-plug USB 2.0 port protection in portable OEM designs.
Availability
MAX1931EUB-T is available at Aetrix Electronics and suitable for USB port protection, notebook computer power switching, and docking station load management requiring stable component supply and long-term industrial availability.
Supply support for MAX1931EUB-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 high-performance analog, mixed-signal, and power-management ICs for industrial, computing, and communications markets.
The MAX1931EUB-T belongs to Maxim's USB power-switch product line, designed specifically to meet USB 2.0 inrush current and fault-protection requirements in space-constrained portable platforms.
FAQ
What is the guaranteed current-limit accuracy of the MAX1931EUB-T over temperature?
The MAX1931EUB-T guarantees a current-limit range of 0.64A (minimum) to 1.06A (maximum) across the full operating temperature range of -40°C to +85°C. This ±15% tolerance is achieved through a precision 1.24V internal reference and matched replica-MOSFET current sensing, ensuring consistent USB-compliant overload protection without external calibration. The MAX1931EUB-T datasheet specifies this performance under VIN = 5V conditions.
Does the MAX1931EUB-T support bidirectional current flow?
No, the MAX1931EUB-T is a unidirectional P-channel MOSFET switch and requires VIN > VOUT to operate correctly. Its internal architecture does not support reverse current conduction, and attempting to drive current from OUT to IN may cause improper regulation or damage. This directional constraint is explicitly stated in the MAX1931EUB-T functional description and must be observed in PCB layout and system design.
How does the FAULT pin behave during a momentary short-circuit event?
During a momentary short-circuit lasting ≤10ms, the MAX1931EUB-T's internal fault-blanking timer suppresses FAULT assertion entirely - the open-drain output remains high-impedance. Only if the overcurrent condition persists beyond 10ms does FAULT go low. This behavior is confirmed in the MAX1931EUB-T typical operating characteristics (toc09) and ensures reliable hot-swap operation without false disconnects in USB applications.
What is the maximum continuous power dissipation for the MAX1931EUB-T in its µMAX package?
The MAX1931EUB-T has a maximum continuous power dissipation of 444mW at TA = +70°C in the 10-pin µMAX package, with a derating factor of 5.6mW/°C above that temperature. This value is calculated from thermal resistance and junction limits, and aligns with the absolute maximum ratings table in the MAX1931EUB-T datasheet. Exceeding this limit risks triggering thermal shutdown.
Can the MAX1931EUB-T be used without an external pull-up resistor on the FAULT pin?
No - the FAULT pin is an open-drain output and requires an external pull-up resistor (typically 100kΩ to IN) to establish a valid logic-high state when no fault is present. Without this pull-up, FAULT cannot signal normal operation, and microprocessor monitoring will fail. This requirement is explicitly documented in the MAX1931EUB-T pin description and fault-indicator section.
MAX1931EUB-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Switch Type:
- USB Switch
- Number of Outputs:
- 1
- Ratio - Input:Output:
- 1:1
- Output Configuration:
- High Side
- Output Type:
- P-Channel
- Interface:
- On/Off
- Voltage - Load:
- 2.7V ~ 5.5V
- Voltage - Supply (Vcc/Vdd):
- Not Required
- Current - Output (Max):
- 500mA
- Rds On (Typ):
- 60mOhm
- Input Type:
- Non-Inverting
- Features:
- Status Flag
- Fault Protection:
- Current Limiting (Fixed), Over Load, Over Temperature, Short Circuit, UVLO
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-uMAX
MAX1931EUB-T FAQ
1.How can I place an order for MAX1931EUB-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1931EUB-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 MAX1931EUB-T reliable?
The price and inventory of MAX1931EUB-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1931EUB-T is usually 5 days.
3.What payment methods are accepted for MAX1931EUB-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1931EUB-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1931EUB-T?
MAX1931EUB-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1931EUB-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 MAX1931EUB-T?
For technical support, including MAX1931EUB-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1931EUB-T requirements.
6.How does Aetrix verify that MAX1931EUB-T is sourced from the original manufacturer or authorized distributors?
All MAX1931EUB-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 MAX1931EUB-T meets industry standards.
7.What is the process for return or replacement of MAX1931EUB-T?
All MAX1931EUB-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1931EUB-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 MAX1931EUB-T part is unused and in its original packaging.
Return procedure for MAX1931EUB-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX1931EUB-T Tags
-
TPS22919DCKR
Texas Instruments
-
MIC2091-1YM5-TR
Microchip Technology
-
MIC2090-1YM5-TR
Microchip Technology
-
TPS22995RZFR
Texas Instruments
-
TPS22975DSGR
Texas Instruments
-
SIP32510DT-T1-GE3
Vishay Siliconix
-
ULN2003D1013TR
STMicroelectronics
-
MIC2005A-1YM5-TR
Microchip Technology
-
MIC2005A-1YM6-TR
Microchip Technology
-
TPS22916BYFPR
Texas Instruments
-
TPS22917DBVR
Texas Instruments
-
ULN2003APWR
Texas Instruments
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…
