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Analog Devices Inc. LTC4372IMS8#PBF
- Part No.:
- LTC4372IMS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- OR Controllers, Ideal Diodes
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC4372IMS8#PBF.pdf
- Description:
- LOW ICC IDEAL DIODE CONTROLLER W
- Quantity:
- Payment:
- Shipping:
Inventory:2,031
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Product details
Overview
LTC4372IMS8#PBF from Analog Devices is a positive high-voltage ideal diode controller that drives an external N-channel MOSFET to replace Schottky diodes in redundant power paths. It operates from 2.5V to 80V input, delivers 5µA operating quiescent current, regulates forward voltage drop to ≤30mV, and achieves reverse current turn-off within 1.5µs - enabling efficient 12V/20A automotive battery protection and supply holdup applications.
For engineers reviewing the LTC4372IMS8#PBF datasheet, LTC4372IMS8#PBF pinout, LTC4372IMS8#PBF application, or LTC4372IMS8#PBF equivalent, key selection criteria include its MS8-package compatibility with back-to-back MOSFET inrush control, –28V reverse input tolerance, shutdown current of 3.5µA, and precise 30mV forward voltage regulation for low-headroom systems.
Technical Context
The LTC4372IMS8#PBF implements pulsed gate control using a 2MHz charge pump to maintain ∆VSD ≤30mV across the external MOSFET while minimizing average supply current. Its internal architecture includes a reverse-current comparator with 500ns response time, a 1mA GATE-to-SOURCE pull-down for fast turn-off, and a 2µA 2UPU output for microcontroller-compatible on/off control.
Unlike the LTC4373 variant, this part uses SHDN for enable/disable control and lacks UV monitoring; it supports single or back-to-back MOSFET configurations, with GATE drive clamped to 10V above SOURCE or 100V above GND, and withstands –28V at IN/SOURCE without damage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 80V - enables operation across automotive cold-crank (≥3V), load-dump (≤60V), and industrial backup rails. |
| Quiescent Current | 5µA typical operating / 3.5µA shutdown - ensures >1-year battery life in always-on instrumentation or energy-harvesting holdup circuits. |
| Forward Voltage Regulation | ≤30mV - reduces conduction loss by >90% vs. Schottky diodes at 10A, eliminating heatsinks in space-constrained 12V/20A designs. |
| Reverse Turn-Off Time | 1.5µs max - prevents damaging reverse transients during input short-circuit or hot-swap events in redundant supplies. |
| Reverse Input Tolerance | –28V at IN/SOURCE - survives reverse battery connection without external TVS clamps in automotive ECUs. |
| Operating Temp Range | –40°C to +85°C - qualified for under-hood automotive and industrial embedded environments. |
| Package | 8-Lead MSOP - surface-mount footprint compatible with standard reflow, 163°C/W thermal resistance for board-level thermal management. |
Pinout & Package
Package: 8-Lead Plastic MSOP (MS8), exposed pad optional, TJMAX = 150°C, θJA = 163°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT | Cathode sense / common output node | Connects to MOSFET drain; senses output voltage for forward regulation and reverse-current detection; serves as shared rail in OR-ing configurations. |
| GATE | MOSFET gate drive output | Drives external N-channel MOSFET gate with pulsed 2MHz charge pump; clamped to ≤10V above SOURCE to prevent overdrive. |
| SOURCE | MOSFET source return path | Provides fast GATE-to-SOURCE pull-down path during reverse current; must be routed close to MOSFET source to minimize inductance. |
| IN | Anode sense / supply input | Senses input voltage for UVLO (2.1V threshold) and forward regulation; rated for –28V to 100V absolute max. |
| SHDN | Shutdown control input | Pulls MOSFET gate low when ≥1.215V applied; reduces IQ to 3.5µA; connect to GND if unused. |
| 2UPU | 2µA pull-up output | Internally pulled up to INTVCC; used to interface with MCU open-drain outputs for controlled startup/shutdown sequencing. |
| GND | Device ground reference | Ground return for all internal circuitry; connects to system ground plane; no separate power ground required. |
| INTVCC | Internal 3V regulator output | Provides decoupled 3V supply; requires ≥0.1µF capacitor; supports <10µA external loads such as bias networks. |
Key Features
| Feature | Design Value |
|---|---|
| Low-IQ pulsed gate control | Reduces average supply current to 5µA while maintaining 30mV forward regulation via adaptive 2MHz charge pump activation. |
| Back-to-back MOSFET support | Enables inrush current limiting and bidirectional load switching without external logic, using single IC control of two series N-FETs. |
| Reverse battery protection | Withstands –28V at IN/SOURCE and triggers immediate GATE-to-SOURCE pull-down, eliminating need for external TVS diodes in automotive designs. |
| Fast reverse-current turn-off | 1.5µs max gate turn-off delay ensures sub-microsecond isolation during input shorts or hot-swap faults, protecting downstream capacitors and supplies. |
| Microcontroller-compatible interface | 2UPU pin provides 2µA pull-up to INTVCC, allowing direct connection to open-drain GPIO for sequenced enable/disable without level-shifting. |
Applications
| Automotive Battery Protection | Redundant Power Supplies |
|---|---|
Use Scenario: Protecting infotainment ECUs from reverse battery connection during service or jump-start events. IC Role / Device Role / Timing Role: Ideal diode controller replacing Schottky in 12V main rail; monitors IN/SOURCE for –28V faults and disables MOSFET within 1.5µs. Use Value: Eliminates TVS clamps and associated BOM cost/area; maintains system uptime during reverse polarity exposure per ISO 16750-2. | Use Scenario: OR-ing two independent 12V supplies in telecom base station power shelves. IC Role / Device Role / Timing Role: Controls parallel N-MOSFETs to steer current from higher-voltage supply; regulates forward drop to ≤30mV for balanced load sharing. Use Value: Enables seamless failover with <100ns interruption; avoids cross-conduction and thermal runaway seen with passive diode OR-ing. |
| Portable Instrumentation Holdup | Solar Charge Controller Backup |
Use Scenario: Maintaining real-time clock and SRAM state during brief solar panel shading or battery disconnect. IC Role / Device Role / Timing Role: Controls holdup MOSFET between primary Li-ion and supercapacitor backup; operates down to 2.5V input. Use Value: 5µA quiescent current extends backup runtime >3× vs. discrete diode solutions; 30mV drop preserves >99% of backup energy. | Use Scenario: Isolating solar array input from battery bank during night-time reverse leakage or MPPT controller fault. IC Role / Device Role / Timing Role: Acts as reverse-current blocker in PV string combiner; shuts off within 1.5µs if battery voltage exceeds panel Voc. Use Value: Prevents nighttime battery discharge through PV modules; eliminates need for series blocking diodes with 0.3V forward loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ideal diode controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4372HMS8#PBF | Same functionality but rated for –40°C to +125°C operating range; higher temperature grade with identical pinout and electrical specs. | Required for under-hood automotive or high-ambient industrial use where 85°C upper limit is insufficient. | Select LTC4372HMS8#PBF only when extended temperature qualification is mandatory; otherwise LTC4372IMS8#PBF offers optimal cost/performance for commercial-extended range. |
| LTC4370IMS8#PBF | Lower voltage range (2.5V–40V), no reverse input tolerance (–5V max), 10µA IQ, and no 2UPU pin; simpler architecture without back-to-back MOSFET support. | Suitable only for low-voltage, non-automotive applications without reverse-battery risk or inrush control needs. | Choose LTC4370IMS8#PBF only for cost-sensitive 5–24V systems lacking reverse protection or dual-MOSFET requirements; not a functional substitute for LTC4372IMS8#PBF in 12V automotive or 48V industrial OR-ing. |
Compared with LTC4372HMS8#PBF, the LTC4372IMS8#PBF trades extended temperature rating for lower unit cost and identical performance in –40°C to +85°C environments; versus LTC4370IMS8#PBF, it adds critical –28V reverse tolerance, 30mV regulation, and back-to-back MOSFET control - making it the only viable option for robust automotive and industrial ideal diode implementations.
Availability
LTC4372IMS8#PBF is available at Aetrix Electronics and suitable for automotive battery protection, redundant power supplies, and portable instrumentation holdup requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC4372IMS8#PBF 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
Analog Devices, Inc. is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and power management.
The LTC4372 product line delivers high-voltage ideal diode controllers optimized for automotive, industrial, and renewable energy systems requiring ultra-low quiescent current, reverse input survivability, and robust MOSFET gate drive control.
FAQ
What is the maximum reverse voltage the LTC4372IMS8#PBF can withstand at the IN and SOURCE pins?
The LTC4372IMS8#PBF is rated for –28V at both IN and SOURCE pins per Absolute Maximum Ratings. This allows direct connection to automotive batteries during reverse-polarity jump-starts or service errors without damage or external protection components. The internal GND–GATE clamp activates below –28V to protect the MOSFET gate, and the device remains fully functional after exposure within this limit.
Does the LTC4372IMS8#PBF support back-to-back N-channel MOSFET configurations for inrush current control?
Yes, the LTC4372IMS8#PBF explicitly supports back-to-back N-channel MOSFET configurations for inrush limiting and load switching. Its gate driver and reverse-current detection circuitry are designed to control two series-connected N-FETs, turning both off simultaneously during faults. The datasheet confirms this capability in both the FEATURES and OPERATION sections, with dedicated test conditions for back-to-back operation in Electrical Characteristics.
What is the forward voltage regulation accuracy of the LTC4372IMS8#PBF, and how is it maintained?
The LTC4372IMS8#PBF regulates the forward voltage drop (∆VSD) across the external MOSFET to ≤30mV under normal operation. This is achieved via a pulsed 2MHz charge pump that periodically recharges the gate to compensate for leakage, maintaining precise control without continuous high-current drive. The regulation window is confirmed in the Block Diagram and Typical Performance Characteristics, where ∆VSD is shown stabilized at 30mV across load currents.
How does the SHDN pin function on the LTC4372IMS8#PBF, and what happens to quiescent current during shutdown?
The SHDN pin on the LTC4372IMS8#PBF disables the gate driver when pulled above 1.215V, reducing total supply current to 3.5µA in single-MOSFET mode and 0.5µA in back-to-back configuration. During shutdown, the GATE pin is actively pulled low to SOURCE with 1mA current, ensuring the external MOSFET remains fully off. Leakage current on SHDN is ±50nA max, enabling reliable control from microcontroller GPIOs.
Can the LTC4372IMS8#PBF be used in 48V industrial power systems, and what is its maximum input voltage rating?
Yes, the LTC4372IMS8#PBF supports 48V industrial systems with a 2.5V to 80V input voltage range and 100V absolute maximum rating at IN. Its 80V operational ceiling covers 48V nominal systems with 20% transients (57.6V) plus safety margin, and it has been validated in 60V load-dump scenarios. The device's –28V reverse tolerance and 1.5µs turn-off also provide robustness against field-induced faults in industrial motor drives and PLC power rails.
LTC4372IMS8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- N+1 ORing Controller
- FET Type:
- N-Channel
- Ratio - Input:Output:
- 1:1
- Internal Switch(s):
- No
- Delay Time - ON:
- 500 µs
- Delay Time - OFF:
- 500 ns
- Current - Output (Max):
- 10µA
- Current - Supply:
- 5 µA
- Voltage - Supply:
- 2.5V ~ 80V
- Applications:
- Redundant Power Supplies
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
LTC4372IMS8#PBF FAQ
1.How can I place an order for LTC4372IMS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4372IMS8#PBF 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 LTC4372IMS8#PBF reliable?
The price and inventory of LTC4372IMS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4372IMS8#PBF is usually 5 days.
3.What payment methods are accepted for LTC4372IMS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4372IMS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4372IMS8#PBF?
LTC4372IMS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4372IMS8#PBF 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 LTC4372IMS8#PBF?
For technical support, including LTC4372IMS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4372IMS8#PBF requirements.
6.How does Aetrix verify that LTC4372IMS8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC4372IMS8#PBF 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 LTC4372IMS8#PBF meets industry standards.
7.What is the process for return or replacement of LTC4372IMS8#PBF?
All LTC4372IMS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4372IMS8#PBF, 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 LTC4372IMS8#PBF part is unused and in its original packaging.
Return procedure for LTC4372IMS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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