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Analog Devices Inc. LTC4372HDD#TRPBF
- Part No.:
- LTC4372HDD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- OR Controllers, Ideal Diodes
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC4372HDD#TRPBF.pdf
- Description:
- LOW ICC IDEAL DIODE CONTROLLER W
- Quantity:
- Payment:
- Shipping:
Inventory:2,335
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Product details
Overview
LTC4372HDD#TRPBF from Analog Devices is a high-voltage ideal diode controller for positive supply rails, driving an external N-channel MOSFET to replace Schottky diodes in OR-ing and reverse-battery protection circuits. It operates from 2.5V to 80V input, delivers ≤30mV forward voltage regulation, achieves 5µA operating quiescent current, and supports –40°C to +125°C ambient operation - enabling use in automotive battery protection and redundant power supplies.
For engineers reviewing the LTC4372HDD#TRPBF datasheet, LTC4372HDD#TRPBF pinout, LTC4372HDD#TRPBF application, or LTC4372HDD#TRPBF equivalent, key selection criteria include its 8-lead 3mm × 3mm DFN package, SHDN-controlled shutdown (3.5µA IQ), fast 1.5µs reverse-current turn-off, back-to-back MOSFET support for inrush control, and ±28V reverse input tolerance without TVS clamps.
Technical Context
The LTC4372HDD#TRPBF implements pulsed gate control using an internal 2MHz charge pump to regulate ∆VSD between IN and OUT to ≤30mV while minimizing average supply current. Its architecture includes a reverse-current comparator with 0.5µs response time, GATE-to-SOURCE pull-down circuitry, and integrated clamp protection limiting GATE–SOURCE to –28V and +16V.
It features dedicated SHDN input for ON/OFF control, 2UPU pin with 2µA pull-up to INTVCC for microcontroller-compatible interface, and internal regulator (INTVCC) providing 2.5–4.5V at ≤10µA load. The device supports both single and back-to-back N-MOSFET configurations for load switching and inrush current limiting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 80V - enables operation across automotive cold-crank (≥2.5V) and load-dump (≤80V) transients. |
| Quiescent Current (Operating) | 5µA - ensures high efficiency in always-on backup power and energy-harvesting applications. |
| Shutdown Current | 3.5µA - reduces system standby loss when SHDN is asserted, critical for battery-powered instrumentation. |
| Forward Voltage Regulation | ≤30mV - minimizes conduction loss vs. Schottky diodes, reducing thermal design burden by >90% at 20A. |
| Reverse Current Turn-Off Time | 1.5µs - limits reverse energy transfer during input short-circuit or supply failure, protecting downstream loads. |
| Reverse Input Tolerance | –28V on IN/SOURCE - withstands reverse battery connection without damage or external TVS components. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive and industrial embedded environments. |
Pinout & Package
Package: 8-lead (3mm × 3mm) plastic DFN (DD package) with optional exposed pad connected to GND. Thermal resistance θJA = 43°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Voltage sense and supply input | Anode of ideal diode; senses input rail (2.5V–80V); withstands –28V reverse without damage. |
| SOURCE | MOSFET source return path | Provides low-impedance return for GATE pull-down during reverse-current events; connects directly to MOSFET source. |
| GATE | N-MOSFET gate drive output | Drives external N-channel MOSFET gate; clamped to –28V below GND and +16V above SOURCE. |
| OUT | Drain voltage sense and output node | Cathode of ideal diode; common output node in OR-ing configurations; requires ≥10µF low-ESR capacitor. |
| SHDN | Shutdown control input | Pulls MOSFET gate low when >1.215V; reduces IQ to 3.5µA; logic-compatible with MCU open-drain outputs via 2UPU. |
| 2UPU | 2µA pull-up output | Internally pulled up to INTVCC; used to drive SHDN for microcontroller-based on/off sequencing. |
| GND | Device ground reference | Ground return for internal regulators and comparators; exposed pad may be connected to PCB GND plane. |
| INTVCC | Internal 3V regulator output | Provides decoupled 2.5–4.5V supply; requires ≥0.1µF capacitor; supports ≤10µA external load. |
Key Features
| Feature | Design Value |
|---|---|
| Low IQ pulsed gate control | Reduces average supply current by cycling 2MHz charge pump only as needed to maintain ≤30mV ∆VSD. |
| Back-to-back MOSFET support | Enables inrush current limiting and bidirectional load switching without adding discrete control logic. |
| Integrated reverse-current protection | Detects reverse flow within 0.5µs and pulls GATE to SOURCE with 130mA sink, preventing bus disturbance. |
| No TVS input clamps required | Withstands –28V reverse inputs and 100V absolute max IN–OUT differential, eliminating external TVS cost and board space. |
| High-side N-MOSFET drive | Drives logic-level (4.5V VGS(th)) or standard (10V VGS(th)) N-MOSFETs across full 2.5–80V input range. |
Applications
| Automotive Battery Protection | Redundant Power Supplies |
|---|---|
Use Scenario: Preventing damage from reverse battery connection in vehicle infotainment or ADAS ECUs. IC Role / Device Role / Timing Role: Ideal diode controller enforcing unidirectional current flow and isolating load during –24V hot-plug events. Use Value: Eliminates need for bulky Schottky diodes and TVS clamps, reducing BOM cost and thermal footprint while meeting ISO 7637-2 pulse 4 requirements. |
Use Scenario: OR-ing two independent 12V supplies in telecom shelf power systems. IC Role / Device Role / Timing Role: Active diode controller ensuring seamless switchover with <1.5µs reverse-current blocking during supply failure. Use Value: Enables zero-voltage-drop current sharing and eliminates cross-conduction risk between supplies, improving system uptime. |
| Portable Instrumentation | Solar Powered Systems |
Use Scenario: Maintaining continuous power to data loggers during battery swap or solar intermittency. IC Role / Device Role / Timing Role: Low-IQ (5µA) ideal diode enabling always-on backup path with minimal self-discharge. Use Value: Extends battery life by >3× vs. Schottky diode solutions, supporting multi-year deployments in remote sensor nodes. |
Use Scenario: Protecting charge controller inputs from reverse polarity during off-grid solar panel installation. IC Role / Device Role / Timing Role: Reverse-input tolerant ideal diode controller blocking –28V faults without latch-up or damage. Use Value: Removes requirement for field-serviceable polarity fuses and enables plug-and-play panel commissioning. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ideal diode controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4372IMS8#TRPBF | Same functionality and specs, but in 8-lead MSOP package (θJA = 163°C/W vs. 43°C/W). | Higher thermal resistance limits continuous current in compact layouts; suitable where board area permits larger footprint. | Select when MSOP hand-soldering or legacy layout compatibility is required; avoid for high-power density automotive designs. |
| LTC4373HDD#TRPBF | Includes UV monitoring (UV/UVOUT pins) and lower shutdown IQ (0.5µA), but lacks SHDN/2UPU interface. | Optimized for undervoltage lockout scenarios (e.g., battery cutoff), not microcontroller-driven ON/OFF control. | Choose when precise input voltage supervision is mandatory; not interchangeable if SHDN sequencing or 2UPU-driven logic is used. |
Compared with LTC4372IMS8#TRPBF, the LTC4372HDD#TRPBF offers superior thermal performance in space-constrained designs; compared with LTC4373HDD#TRPBF, it provides deterministic microcontroller interface capability at the expense of UV monitoring - making it the preferred choice for active power sequencing in automotive and portable systems.
Availability
LTC4372HDD#TRPBF is available at Aetrix Electronics and suitable for automotive battery protection, redundant power supplies, and portable instrumentation requiring stable component supply across extended temperature ranges.
Supply support for LTC4372HDD#TRPBF 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC4372 product line delivers high-voltage ideal diode control for fault-tolerant power architectures, specifically engineered for automotive-grade reliability, reverse-battery survival, and ultra-low quiescent current in always-on systems.
FAQ
What is the maximum input voltage the LTC4372HDD#TRPBF can withstand?
The LTC4372HDD#TRPBF has an absolute maximum IN voltage rating of 100V and operates continuously from 2.5V to 80V. It tolerates –28V reverse input on IN and SOURCE pins without damage, making it suitable for automotive load-dump and reverse-battery conditions. This rating is validated per Analog Devices' Absolute Maximum Ratings table and applies across the full –40°C to +125°C temperature range.
How does the LTC4372HDD#TRPBF achieve 5µA quiescent current?
The LTC4372HDD#TRPBF achieves 5µA operating IQ through pulsed gate control: its internal 2MHz charge pump activates only periodically to recharge the MOSFET gate, maintaining ∆VSD ≤30mV while spending most time in low-power sleep mode (3.5µA). Average current depends on gate leakage, MOSFET capacitance, and load - confirmed in Figure G01–G03 of the official datasheet.
Can the LTC4372HDD#TRPBF drive back-to-back N-channel MOSFETs?
Yes, the LTC4372HDD#TRPBF explicitly supports back-to-back N-MOSFET configurations for inrush current limiting and load switching. In this mode, SOURCE is left unconnected, and the device controls both MOSFET gates to block reverse current and manage turn-on slew rate - verified in the "ELECTRICAL CHARACTERISTICS" table (IQ test condition) and "OPERATION" section of the datasheet.
What is the purpose of the 2UPU pin on the LTC4372HDD#TRPBF?
The 2UPU pin on the LTC4372HDD#TRPBF provides a 2µA pull-up current to INTVCC and is designed to interface with microcontroller open-drain outputs for SHDN control. Connecting 2UPU to SHDN allows a low-side MCU GPIO to directly enable/disable the controller without external pull-up resistors - a feature documented in the "PIN FUNCTIONS" and "OPERATION" sections of the datasheet.
Does the LTC4372HDD#TRPBF require external TVS diodes for reverse input protection?
No, the LTC4372HDD#TRPBF does not require external TVS diodes for reverse input protection. Its IN and SOURCE pins are rated for –28V reverse voltage, and internal clamps protect GATE against overvoltage. This eliminates TVS components in automotive and portable designs - explicitly stated in the "FEATURES" list and validated in the "ABSOLUTE MAXIMUM RATINGS" table.
LTC4372HDD#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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 ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x3)
LTC4372HDD#TRPBF FAQ
1.How can I place an order for LTC4372HDD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4372HDD#TRPBF 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 LTC4372HDD#TRPBF reliable?
The price and inventory of LTC4372HDD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4372HDD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC4372HDD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4372HDD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4372HDD#TRPBF?
LTC4372HDD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4372HDD#TRPBF 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 LTC4372HDD#TRPBF?
For technical support, including LTC4372HDD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4372HDD#TRPBF requirements.
6.How does Aetrix verify that LTC4372HDD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4372HDD#TRPBF 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 LTC4372HDD#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC4372HDD#TRPBF?
All LTC4372HDD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4372HDD#TRPBF, 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 LTC4372HDD#TRPBF part is unused and in its original packaging.
Return procedure for LTC4372HDD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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