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Analog Devices Inc. LTC4367IMS8-1#PBF
- Part No.:
- LTC4367IMS8-1#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Power Management - Specialized
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC4367IMS8-1#PBF.pdf
- Description:
- SUPPLY PROTECTION CONTROLLER
- Quantity:
- Payment:
- Shipping:
Inventory:849
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Product details
Overview
LTC4367IMS8-1#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 adjustable UV/OV thresholds (±25mV hysteresis), and delivers 500µs fast recovery after fault clearance - critical for automotive load-dump protection and industrial hot-swap applications.
For engineers reviewing the LTC4367IMS8-1#PBF datasheet, LTC4367IMS8-1#PBF pinout, LTC4367IMS8-1#PBF application, or LTC4367IMS8-1#PBF equivalent, key selection considerations include its 500µs turn-on delay (vs. 32ms in standard LTC4367), MS8 package compatibility, –40°C to 85°C industrial temperature grade, and gate drive capability up to 13.1V referenced to VOUT.
Technical Context
The LTC4367IMS8-1#PBF integrates dual high-accuracy comparators (0.5V threshold, 1µs propagation) with independent UV and OV inputs, enabling user-defined voltage windows via external resistive dividers. Its internal charge pump drives external N-MOSFET gates with 35µA pull-up and up to 90mA fast/slow pull-down current paths.
Reverse protection is implemented via an internal switch that connects GATE to negative VIN, forcing M2 off while leveraging body diode blocking. The device operates with only 70µA quiescent current and enters 5µA shutdown when SHDN is low - optimized for always-on industrial and automotive subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Protection Range | –40V to +100V input withstand; enables robust surge immunity against automotive load dump and reverse battery connection. |
| Operating Voltage | 2.5V to 60V VIN range; supports wide-input industrial power rails and legacy 24V/48V systems. |
| GATE Turn-On Delay | 500µs (LTC4367-1 variant); enables rapid reconnection after transient overvoltage events without output chatter. |
| UV/OV Threshold Accuracy | ±7.5mV at 500mV reference (±1.5%); ensures precise window-setting for sensitive downstream loads like FPGAs or ADCs. |
| Quiescent Current | 70µA typical operating current; minimizes standby power loss in battery-backed or energy-sensitive applications. |
| Shutdown Current | 5µA max; allows deep sleep mode during system idle without compromising fault detection readiness. |
| Package | 8-lead MSOP (MS8); surface-mount footprint compatible with automated assembly and thermal management via exposed pad grounding. |
Pinout & Package
8-lead plastic MSOP (MS8) package with optional exposed pad connected to GND for thermal and EMI performance. Pinout validated per Linear Technology (Analog Devices) datasheet revision 4367fb.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | High-voltage input supply rail | Withstands –40V to +100V; powers internal LDO and serves as primary fault monitoring node. |
| UV | Undervoltage comparator input | 0.5V falling threshold with 25mV hysteresis; connects to resistive divider to set lower fault limit. |
| OV | Overvoltage comparator input | 0.5V rising threshold with 25mV hysteresis; sets upper fault limit; clamped to ≤5V absolute max. |
| GND | Device ground reference | Common return for all internal circuitry; exposed pad may be tied to PCB ground plane. |
| GATE | Gate drive output | Charge-pump-driven output referenced to VOUT; provides up to 13.1V enhancement above VOUT to turn on N-MOSFETs. |
| VOUT | Output voltage sense | Senses post-MOSFET voltage; used as charge pump return and fault monitoring reference point. |
| FAULT | Open-drain fault indicator | Pulled low during UV/OV fault, shutdown, or VIN < UVLO; drives external LED or microcontroller interrupt. |
| SHDN | Shutdown control input | Active-low enable; asserts 90µA sink to slowly discharge GATE and enter 5µA low-power state. |
Key Features
| Feature | Design Value |
|---|---|
| No external TVS or input capacitor required | Enables compact BOM and eliminates TVS derating concerns for 100V transients in space-constrained designs. |
| Adjustable UV/OV thresholds | Supports custom voltage windows (e.g., 7V–36V) using standard 1% resistors - no trimming or calibration needed. |
| Reverse supply blocking to –40V | Prevents damage from miswired batteries or AC adapters by automatically disconnecting load when VIN goes negative. |
| 500µs fast recovery (LTC4367-1) | Restores power within one switching cycle after brief surges - essential for real-time control systems and PoE-powered devices. |
| Back-to-back N-MOSFET control | Enables bidirectional blocking and low RDS(on) conduction path vs. P-MOSFET alternatives - reduces conduction loss and heat generation. |
Applications
| Automotive Load Dump Protection | Industrial Hot-Swap Power Entry |
|---|---|
Use Scenario: Protecting infotainment ECUs during 12V/24V vehicle battery disconnection or alternator load dump events. IC Role / Device Role / Timing Role: Input fault monitor and MOSFET gate controller; asserts FAULT within 1µs of OV detection and blocks >100V transients. Use Value: Eliminates need for bulky TVS diodes and enables use of cost-effective N-channel MOSFETs instead of high-VGS P-channel devices. | Use Scenario: Safely inserting/replacing power modules in programmable logic controllers (PLCs) or distributed I/O systems. IC Role / Device Role / Timing Role: Reverse polarity and overvoltage supervisor; provides controlled MOSFET turn-off during live insertion to prevent arcing and bus disturbance. Use Value: Enables zero-downtime maintenance with 500µs recovery - faster than standard LTC4367 - minimizing process interruption. |
| Portable Instrumentation Power Management | Network Equipment DC Input Protection |
Use Scenario: Battery-powered test equipment accepting multiple input sources (AC adapter, USB PD, external battery). IC Role / Device Role / Timing Role: Dual-supply selector and fault isolator; uses SHDN to arbitrate between sources and FAULT to signal invalid input. Use Value: Reduces standby current to 5µA in shutdown - extends battery life - while maintaining full fault coverage across all input modes. | Use Scenario: Protecting 48V PoE-powered switches and wireless access points from field wiring errors or lightning-induced surges. IC Role / Device Role / Timing Role: Primary front-end protector; monitors for undervoltage (brownout), overvoltage (surge), and reverse polarity before enabling downstream DC-DC converters. Use Value: Withstands –40V to +100V without external clamping - simplifies compliance with IEC 61000-4-5 Level 4 surge requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage/undervoltage protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4367IMS8#PBF | 32ms GATE turn-on delay vs. 500µs; identical pinout, package, and temperature grade (–40°C to 85°C). | Less suitable for time-critical recovery; preferred where slower response avoids nuisance tripping on noisy supplies. | Select LTC4367IMS8#PBF when system stability under noisy line conditions outweighs fast recovery needs. |
| TPS26631RGER | Integrated 60V eFuse with current limiting; fixed 6.5V UVLO and no adjustable OV/UV thresholds; 2.5ms fault response. | Provides overcurrent protection but lacks reverse voltage blocking and fine-grained window control. | Choose TPS26631RGER when combined overcurrent + overvoltage protection is required and reverse polarity risk is mitigated externally. |
Compared with LTC4367IMS8#PBF, the LTC4367IMS8-1#PBF offers 64× faster fault recovery - critical for real-time systems - while retaining identical thermal, package, and environmental specs. Versus TPS26631RGER, it delivers superior flexibility in voltage window definition and true –40V reverse blocking, but requires external MOSFETs.
Availability
LTC4367IMS8-1#PBF is available at Aetrix Electronics and suitable for automotive load dump protection, industrial hot-swap power entry, and portable instrumentation requiring stable component supply with guaranteed long-term availability.
Supply support for LTC4367IMS8-1#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 (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management ICs, serving industrial, automotive, communications, and healthcare markets.
The LTC4367 family was designed specifically for high-reliability input protection in harsh environments - delivering precision voltage window monitoring, reverse polarity blocking, and robust MOSFET gate control in minimal footprint packages.
FAQ
What is the key functional difference between LTC4367IMS8-1#PBF and LTC4367IMS8#PBF?
The LTC4367IMS8-1#PBF features a 500µs GATE turn-on delay after fault clearance, whereas the standard LTC4367IMS8#PBF requires 32ms. Both share identical pinout, MS8 package, –40°C to 85°C temperature rating, and protection specifications. This faster recovery makes LTC4367IMS8-1#PBF ideal for applications where uninterrupted power delivery is time-critical, such as real-time control loops or PoE-powered devices.
Does LTC4367IMS8-1#PBF require external MOSFETs, and what type is recommended?
Yes, LTC4367IMS8-1#PBF requires two external N-channel MOSFETs configured back-to-back for bidirectional blocking. Recommended devices include Si7942 (100V, 49mΩ) for 24V/48V industrial systems or SiZ340 (30V, 10mΩ) for low-voltage battery-powered applications. Gate drive capability reaches 13.1V above VOUT, so MOSFETs must support ≥20V VGS rating and appropriate VDS margin for the application's maximum fault voltage.
How does LTC4367IMS8-1#PBF handle reverse supply conditions down to –40V?
LTC4367IMS8-1#PBF detects negative VIN via an internal reverse voltage comparator and immediately connects the GATE pin to VIN through an internal switch. This forces the source-gate voltage of the downstream N-MOSFET (M2) to near-zero, turning it off and blocking current flow. The upstream MOSFET's (M1) body diode conducts briefly but is blocked by M2's cutoff - ensuring no reverse current reaches VOUT. This architecture eliminates need for external diodes or P-MOSFETs.
Can LTC4367IMS8-1#PBF be used without an input capacitor or TVS diode?
Yes - LTC4367IMS8-1#PBF is explicitly designed to operate without external TVS diodes or bulk input capacitors in most applications. Its ±40V to +100V absolute maximum ratings, integrated fast comparators (1µs propagation), and robust gate drive allow direct connection to unfiltered supplies. However, local ceramic decoupling (e.g., 100nF near VIN/GND) is still recommended for noise immunity and ESD robustness per Analog Devices' layout guidelines.
What are the minimum external components required to implement basic protection with LTC4367IMS8-1#PBF?
A functional LTC4367IMS8-1#PBF circuit requires: two back-to-back N-channel MOSFETs, three resistors forming UV/OV voltage dividers (e.g., 59kΩ/243kΩ/1.82MΩ for 3.5V–18V window), a pull-up resistor on SHDN if not actively driven, and a 100nF ceramic capacitor between VIN and GND. No TVS, input bulk capacitor, or additional op-amps are needed - enabling BOM reduction and board space savings.
LTC4367IMS8-1#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
- Applications:
- Overvoltage, Undervoltage Protection
- Current - Supply:
- 70µA
- Voltage - Supply:
- 2.5V ~ 60V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
LTC4367IMS8-1#PBF FAQ
1.How can I place an order for LTC4367IMS8-1#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4367IMS8-1#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 LTC4367IMS8-1#PBF reliable?
The price and inventory of LTC4367IMS8-1#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4367IMS8-1#PBF is usually 5 days.
3.What payment methods are accepted for LTC4367IMS8-1#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4367IMS8-1#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4367IMS8-1#PBF?
LTC4367IMS8-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4367IMS8-1#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 LTC4367IMS8-1#PBF?
For technical support, including LTC4367IMS8-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4367IMS8-1#PBF requirements.
6.How does Aetrix verify that LTC4367IMS8-1#PBF is sourced from the original manufacturer or authorized distributors?
All LTC4367IMS8-1#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 LTC4367IMS8-1#PBF meets industry standards.
7.What is the process for return or replacement of LTC4367IMS8-1#PBF?
All LTC4367IMS8-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4367IMS8-1#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 LTC4367IMS8-1#PBF part is unused and in its original packaging.
Return procedure for LTC4367IMS8-1#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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