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Analog Devices Inc. LTC4367HDD-1#PBF
- Part No.:
- LTC4367HDD-1#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Power Management - Specialized
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC4367HDD-1#PBF.pdf
- Description:
- SUPPLY PROTECTION CONTROLLER
- Quantity:
- Payment:
- Shipping:
Inventory:1,864
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Product details
Overview
LTC4367HDD-1#PBF from Analog Devices is a high-voltage, precision overvoltage/undervoltage/reverse supply protection controller for 2.5V–60V systems. It controls back-to-back N-channel MOSFETs to block faults up to +100V and –40V, features 500µs fast recovery after fault clearance, and operates with only 70µA quiescent current. It is used in automotive load-dump protection circuits where rapid reconnection after transient overvoltage is critical.
For engineers reviewing the LTC4367HDD-1#PBF datasheet, LTC4367HDD-1#PBF pinout, LTC4367HDD-1#PBF application, or LTC4367HDD-1#PBF equivalent, key selection considerations include its –40°C to 125°C extended temperature rating, 500µs GATE turn-on delay (vs. 32ms for standard LTC4367), adjustable UV/OV thresholds via resistive dividers, and DFN-8 (3mm × 3mm) package compatibility with high-density automotive PCB layouts.
Technical Context
The LTC4367HDD-1#PBF implements dual high-accuracy comparators (±0.5% threshold tolerance, 25mV hysteresis) for independent UV and OV monitoring, with propagation delay under 2µs. Its internal charge pump delivers up to 13.1V gate drive referenced to VOUT, enabling low-RDS(on) N-MOSFETs even at low input voltages.
It integrates reverse-voltage detection that actively pulls GATE to VIN during negative transients, ensuring robust blocking of –40V faults. The device enters 5µA shutdown mode when SHDN is low and provides open-drain FAULT output with sub-0.4V low-level voltage at 500µA sink current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 2.5V to 60V - supports wide-input industrial and automotive power rails without external regulation. |
| Protection Range | –40V to +100V - withstands load dump surges and reverse battery connection without external TVS or capacitor. |
| GATE Turn-On Delay | 500µs - enables rapid system recovery after transient overvoltage events (e.g., ISO 7637-2 Pulse 5a), unlike 32ms delay in standard LTC4367. |
| UV/OV Threshold Accuracy | ±0.5% at 0.5V reference - allows precise, stable window-setting (e.g., 7V–36V) using high-value resistor dividers with <10nA leakage. |
| Quiescent Current | 70µA - minimizes standby power loss in always-on vehicle modules such as telematics or ADAS sensors. |
| Temperature Range | –40°C to +125°C - qualified for under-hood automotive applications per AEC-Q100 stress test conditions. |
| Package | 8-Lead 3mm × 3mm DFN - surface-mount footprint with exposed pad for thermal dissipation in compact engine-control units. |
Pinout & Package
Package: 8-lead plastic DFN (3mm × 3mm), exposed pad (optional ground connection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | High-voltage input supply rail | Withstands –40V to +100V; powers internal LDO and charge pump; must be decoupled near IC for surge immunity. |
| UV | Undervoltage comparator input | 0.5V falling threshold; connects to resistive divider to set lower fault limit (e.g., 7V); <10nA leakage enables MΩ-scale resistors. |
| OV | Overvoltage comparator input | 0.5V rising threshold; sets upper fault limit (e.g., 36V); clamped to 5V max to prevent damage from >5V external noise. |
| GND | Device ground reference | Return path for all internal circuitry; exposed pad may be connected here for improved thermal performance. |
| GATE | Gate drive output | Charge-pump-enhanced output (up to 13.1V above VOUT); sinks 60mA during fault; tracks VIN during reverse faults. |
| VOUT | Output voltage sense | Sense node for load-side voltage; serves as charge pump reference; must be routed with low impedance to avoid false fault triggering. |
| FAULT | Open-drain fault indicator | Pulled low during UV/OV fault, SHDN assertion, or VIN < UVLO (1.8V); requires external pull-up for microcontroller interrupt signaling. |
| SHDN | Shutdown control input | Active-low enable; 0.75V threshold; places IC in 5µA shutdown and forces GATE to track VOUT during controlled turn-off. |
Key Features
| Feature | Design Value |
|---|---|
| Fast 500µs fault recovery | Enables immediate reconnection after short-duration transients (e.g., alternator ripple spikes), reducing system downtime vs. 32ms standard version. |
| Adjustable UV/OV thresholds | Configurable via two external resistors per threshold; supports custom windows (e.g., 9V–16V for 12V automotive) without trimming or calibration. |
| No input capacitor or TVS required | Internal 100V-rated input stage eliminates need for external surge suppression components in most ISO 7637-2-compliant designs. |
| Reverse supply protection | Detects –40V input and actively clamps GATE to VIN, ensuring zero forward conduction through back-to-back N-MOSFET body diodes. |
| Low 70µA operating current | Reduces parasitic drain on vehicle battery during ignition-off states, supporting >10-year shelf life in always-connected modules. |
Applications
| Automotive Load Dump Protection | Industrial Power Input Conditioning |
|---|---|
Use Scenario: Protecting infotainment head units from 12V battery system surges during alternator load dump (ISO 7637-2 Pulse 5a, +70V/100ms). IC Role / Device Role / Timing Role: Input fault monitor and MOSFET gate controller; asserts FAULT within 2µs of overvoltage detection and disables GATE within 6µs. Use Value: Eliminates need for 100V-rated TVS diodes and reduces BOM cost by >30% while maintaining full compliance with automotive EMC standards. | Use Scenario: Securing programmable logic controllers (PLCs) against miswired 24V DC power supplies delivering –24V or +48V due to field technician error. IC Role / Device Role / Timing Role: Bidirectional input supervisor; blocks reverse polarity and overvoltage before they reach downstream DC/DC converters. Use Value: Prevents catastrophic failure of isolated power stages and avoids costly field returns-verified across –40°C to +85°C operating range. |
| Portable Medical Instrumentation | Ruggedized Network Equipment |
Use Scenario: Battery-powered ultrasound devices accepting AC adapters with variable polarity and voltage (e.g., 9–24V, ±5% tolerance). IC Role / Device Role / Timing Role: Polarity-agnostic input protector; enables safe hot-swap of external power without manual switch or fuse replacement. Use Value: Supports dual-power operation (battery + adapter) with automatic source selection and zero cross-conduction risk between sources. | Use Scenario: Outdoor telecom base stations powered by solar-charged batteries subject to deep discharge (<5V) and lightning-induced surges (>60V). IC Role / Device Role / Timing Role: Wide-range input supervisor with programmable UV lockout (e.g., 4.5V) and OV clamp (e.g., 30V) to preserve battery health and prevent surge damage. Use Value: Extends battery service life by preventing deep-discharge cycling and avoids single-point failure from unclamped transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar input protection controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4367HDD#PBF | 32ms GATE turn-on delay; identical UV/OV accuracy, temperature range, and package. | Suitable for non-time-critical protection where slower recovery is acceptable (e.g., static industrial sensors). | Select LTC4367HDD#PBF if system timing budget allows longer fault-clearance-to-reconnect intervals. |
| TPS26631RTJT | Integrated 60V eFuse with current limiting; no adjustable UV/OV; fixed 2.5V–60V operating range; 1.2ms response time. | Best for overcurrent-dominated threats (e.g., shorted cables); lacks reverse-voltage blocking capability. | Choose TPS26631RTJT only when overcurrent protection is primary requirement and reverse polarity is handled elsewhere. |
Compared with LTC4367HDD#PBF, the LTC4367HDD-1#PBF offers 64× faster fault recovery-critical for automotive subsystems requiring uninterrupted operation-and compared with TPS26631RTJT, it provides fully configurable voltage windowing and true –40V reverse blocking, making it uniquely suited for high-reliability, multi-threat input conditioning.
Availability
LTC4367HDD-1#PBF is available at Aetrix Electronics and suitable for automotive load-dump protection, industrial power input conditioning, and portable medical instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC4367HDD-1#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 LTC4367 product line delivers high-voltage, ultra-low-quiescent-current protection controllers designed specifically for automotive, industrial, and medical systems demanding robust, programmable input fault tolerance without external protection components.
FAQ
What is the maximum input voltage the LTC4367HDD-1#PBF can withstand?
The LTC4367HDD-1#PBF has an absolute maximum input voltage rating of +100V and –40V. This allows it to survive automotive load dump transients defined in ISO 7637-2 Pulse 5a without external TVS diodes. Its operating range remains 2.5V to 60V, meaning sustained operation above 60V is not supported, but transient survival up to 100V is guaranteed per Absolute Maximum Ratings.
How does the LTC4367HDD-1#PBF differ from the standard LTC4367 in recovery timing?
The LTC4367HDD-1#PBF features a 500µs GATE turn-on delay after fault clearance, whereas the standard LTC4367 requires 32ms. This 64× faster recovery is achieved via internal timing circuit optimization and enables rapid reconnection in time-sensitive automotive subsystems-such as ADAS cameras or radar modules-where even brief power interruption causes functional safety violations.
Can the LTC4367HDD-1#PBF be used with P-channel MOSFETs?
No-the LTC4367HDD-1#PBF is explicitly designed to drive back-to-back N-channel MOSFETs. Its gate drive architecture uses a charge pump referenced to VOUT to generate gate voltage above the source, which is incompatible with P-MOSFET source-follower configuration. Using P-MOSFETs would result in incomplete turn-on and excessive conduction losses; the datasheet specifies N-MOSFETs exclusively (e.g., Si7942, SiZ340).
What is the purpose of the exposed pad on the LTC4367HDD-1#PBF DFN package?
The exposed pad on the LTC4367HDD-1#PBF's 3mm × 3mm DFN package serves as a thermal and electrical connection point. While optional for grounding, connecting it to PCB ground improves thermal dissipation-reducing θJA from 43°C/W to ~30°C/W-and enhances noise immunity for the internal comparators and charge pump. It must not be left floating in high-reliability automotive designs.
Does the LTC4367HDD-1#PBF provide overcurrent protection?
No-the LTC4367HDD-1#PBF does not include overcurrent sensing or limiting functionality. It monitors only input voltage conditions: overvoltage, undervoltage, and reverse polarity. Overcurrent protection must be implemented externally-e.g., using a current-sense amplifier and comparator driving the SHDN pin-or by pairing with a dedicated eFuse like the TPS26631. Its FAULT output reflects only voltage-related faults and shutdown state.
LTC4367HDD-1#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Applications:
- Overvoltage, Undervoltage Protection
- Current - Supply:
- 70µA
- Voltage - Supply:
- 2.5V ~ 60V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x3)
LTC4367HDD-1#PBF FAQ
1.How can I place an order for LTC4367HDD-1#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4367HDD-1#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 LTC4367HDD-1#PBF reliable?
The price and inventory of LTC4367HDD-1#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4367HDD-1#PBF is usually 5 days.
3.What payment methods are accepted for LTC4367HDD-1#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4367HDD-1#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4367HDD-1#PBF?
LTC4367HDD-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4367HDD-1#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 LTC4367HDD-1#PBF?
For technical support, including LTC4367HDD-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4367HDD-1#PBF requirements.
6.How does Aetrix verify that LTC4367HDD-1#PBF is sourced from the original manufacturer or authorized distributors?
All LTC4367HDD-1#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 LTC4367HDD-1#PBF meets industry standards.
7.What is the process for return or replacement of LTC4367HDD-1#PBF?
All LTC4367HDD-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4367HDD-1#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 LTC4367HDD-1#PBF part is unused and in its original packaging.
Return procedure for LTC4367HDD-1#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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