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Analog Devices Inc. LTC4368HMS-2#PBF
- Part No.:
- LTC4368HMS-2#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC4368HMS-2#PBF.pdf
- Description:
- IC SURGE SUPPRESSION ADJ 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,782
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Product details
Overview
LTC4368HMS-2#PBF from Analog Devices is a high-voltage bidirectional electronic circuit breaker and UV/OV protection controller for back-to-back N-channel MOSFETs. It operates from 2.5V to 60V input, provides ±1.5% adjustable undervoltage/overvoltage thresholds, features –3mV reverse current sense threshold (LTC4368-2 variant), and delivers 13.1V gate drive enhancement - used in automotive surge protection, energy storage systems, and portable instrumentation requiring robust reverse battery and AC-blocking capability.
For engineers reviewing the LTC4368HMS-2#PBF datasheet, LTC4368HMS-2#PBF pinout, LTC4368HMS-2#PBF application, or LTC4368HMS-2#PBF equivalent, key selection considerations include its –40°C to 125°C automotive-grade temperature range, 10-pin MSOP package, 5µA shutdown current, 32ms turn-on debounce delay, and precise ±50mV forward / –3mV reverse current fault detection with auto-retry or latch-off configuration via RETRY pin.
Technical Context
The LTC4368HMS-2#PBF integrates dual fast comparators (1µs propagation) for UV/OV monitoring with 25mV hysteresis and low-leakage inputs (<10nA at 100°C), enabling high-impedance resistive dividers. Its bidirectional overcurrent protection uses separate forward (+50mV) and reverse (–3mV) sense thresholds referenced to SENSE–VOUT, with independent fault propagation paths and 3–18µs response time.
Gate control employs an internal charge pump delivering up to 13.1V enhancement above VOUT, with fast (6µs) and slow (575µs) pull-down modes, 32ms recovery delay after UV/OV faults, and automatic GATE tracking during reverse VIN conditions. The device blocks 50Hz/60Hz AC power by enforcing a minimum 32ms valid window before enabling MOSFET conduction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 60V operating; –40V to 100V fault protection - supports wide-supply industrial and automotive inputs while surviving load dump and reverse battery events. |
| Reverse Current Threshold | –3mV (SENSE–VOUT) - enables ultra-sensitive reverse polarity detection for low-RDS(on) MOSFETs in battery backup and energy storage applications. |
| Forward Current Threshold | +50mV (SENSE–VOUT) - sets precise 50mV overcurrent trip point for forward direction, scalable via external sense resistor. |
| UV/OV Threshold Accuracy | ±1.5% with 25mV hysteresis - ensures stable voltage windowing without oscillation during noisy supply transitions. |
| Shutdown Current | 5µA - minimizes standby power loss in always-on automotive and IoT systems. |
| Gate Drive Enhancement | Up to 13.1V above VOUT - fully enhances standard N-channel MOSFETs even at low VIN (2.5V), eliminating need for P-channel or charge-pump ICs. |
| Temperature Range | –40°C to +125°C - qualified per AEC-Q100 Grade H, suitable for under-hood and industrial control environments. |
Pinout & Package
Package: 10-Lead Plastic MSOP (LTGTJ marking), exposed pad optional for thermal relief or grounding.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input Supply Rail | Accepts –40V to 100V; includes 2.2V UVLO and hot-swap capability; primary fault sensing node for UV/OV comparators. |
| UV | Undervoltage Comparator Input | 0.5V falling threshold with 25mV hysteresis; connects to external divider to set user-defined lower voltage limit. |
| OV | Overvoltage Comparator Input | 0.5V rising threshold with 25mV hysteresis; connects to external divider to set user-defined upper voltage limit. |
| RETRY | Forward OC Recovery Mode Select | GND = latch-off; capacitor = auto-retry timer (5.5ms/nF); determines system behavior after forward overcurrent event. |
| GND | Device Ground Reference | Common return for internal logic, comparators, and gate driver; exposed pad may be connected here for thermal performance. |
| GATE | MOSFET Gate Driver Output | Charge-pump driven output; pulls up to VOUT+13.1V, pulls down fast (6µs) or slow (575µs); tracks VOUT during reverse VIN. |
| SENSE | Current Sense Input | Differential input for RSENSE; detects +50mV (forward) or –3mV (reverse) across RSENSE–VOUT to trigger OC protection. |
| VOUT | Output Voltage Sense | Reference for GATE charge pump; must rise >2.2V to enable reverse fault comparators; requires ≥1µF local bypass. |
| FAULT | Open-Drain Fault Indicator | Pulled low on UV/OV/OC faults, SHDN low, or VIN < UVLO; requires external pull-up; signals system-level fault condition. |
| SHDN | Shutdown Control Input | Active-low enable; <0.75V disables GATE charge pump and enters 5µA shutdown mode; toggling clears latched forward OC faults. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional Overcurrent Protection | Separate +50mV forward and –3mV reverse thresholds enable independent, precision current limiting in both power flow directions - critical for battery backup and regenerative systems. |
| AC Power Blocking | 32ms turn-on delay prevents connection to 50Hz/60Hz AC inputs by requiring sustained DC validity - eliminates risk of accidental AC mains connection in field-deployed equipment. |
| Automotive Temperature Grade | –40°C to +125°C operation with AEC-Q100 qualification ensures reliability in engine control units, ADAS modules, and EV charging interfaces. |
| Low-Power Operation | 80µA operating current and 5µA shutdown current extend battery life in portable instrumentation and always-on telematics systems. |
| Back-to-Back N-Channel MOSFET Control | Eliminates need for costly P-channel high-side switches; leverages low-RDS(on) N-channel devices for minimal conduction loss and thermal footprint. |
Applications
| Automotive Load Dump Protection | Energy Storage System (ESS) Bidirectional Isolation |
|---|---|
Use Scenario: Protects infotainment and ADAS ECUs from 12V/24V battery line transients including ISO 7637-2 Pulse 5a (load dump up to 60V) and reverse battery connection. IC Role / Device Role / Timing Role: UV/OV supervisor and bidirectional circuit breaker controlling back-to-back N-MOSFETs; enforces 32ms valid DC window before enabling power path. Use Value: Prevents catastrophic failure during jump-starts or incorrect battery installation; –40V reverse protection and 100V positive clamping meet automotive OEM requirements. | Use Scenario: Isolates lithium-ion battery packs from inverters and chargers in grid-tied solar ESS, preventing reverse current flow during grid outage or charger fault. IC Role / Device Role / Timing Role: Bidirectional current monitor and gate controller; detects –3mV reverse current to disconnect pack within microseconds during regenerative braking or charger reversal. Use Value: Enables use of low-cost N-channel MOSFETs instead of P-channel or relays; –3mV threshold supports high-current, low-loss designs with sub-1mΩ sense resistors. |
| Portable Test Instrumentation Power Input | Industrial Hot-Swappable Power Module |
Use Scenario: Secures benchtop multimeters and oscilloscope front-ends against misconnected lab supplies, reversed adapters, or accidental AC input. IC Role / Device Role / Timing Role: Input protector with programmable UV/OV window and AC blocking; monitors SENSE–VOUT for both forward overload and reverse leakage. Use Value: Eliminates need for manual fuse replacement; 5µA shutdown current preserves battery during storage; 10-pin MSOP fits compact handheld form factors. | Use Scenario: Enables safe insertion/removal of redundant 48V DC power modules in telecom and server racks without interrupting downstream loads. IC Role / Device Role / Timing Role: Hot-swap controller with inrush limiting via GATE slew rate control; uses RETRY pin to configure auto-retry after transient overcurrent events. Use Value: Prevents arcing and voltage droop during plug-in; 32ms debounce rejects contact bounce; 13.1V gate drive ensures full MOSFET enhancement even at cold start. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional overvoltage/overcurrent protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4368HDD-2#PBF | Same functionality and electrical specs; 3mm × 3mm DFN package instead of MSOP; θJA = 43°C/W vs 160°C/W. | Better thermal performance in high-power density layouts; requires different PCB footprint and reflow profile. | Select for space-constrained boards needing lower junction-to-ambient thermal resistance. |
| TPS26631RHFR | Single-direction (forward-only) protection; fixed 3.2V–60V operating range; no reverse voltage or reverse current protection. | Lacks reverse battery and bidirectional OC capability; not suitable for ESS or automotive reverse polarity scenarios. | Choose only for cost-sensitive, unidirectional 12V/24V systems where reverse protection is handled externally. |
Compared with LTC4368HDD-2#PBF, the LTC4368HMS-2#PBF offers identical protection features in a thermally less efficient but more manufacturable MSOP package; versus TPS26631RHFR, it adds essential reverse polarity and bidirectional current monitoring required for automotive and energy storage safety compliance.
Availability
LTC4368HMS-2#PBF is available at Aetrix Electronics and suitable for automotive surge protection, energy storage systems, and portable instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC4368HMS-2#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 leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC4368 product line delivers integrated high-voltage protection controllers for back-to-back N-MOSFET configurations, designed specifically for automotive-grade reliability, bidirectional power path control, and robust fault tolerance in harsh environments.
FAQ
What is the reverse current sense threshold for LTC4368HMS-2#PBF?
The LTC4368HMS-2#PBF has a reverse current sense threshold of –3mV (SENSE–VOUT), distinguishing it from the LTC4368-1 variant (–50mV). This ultra-low threshold enables precise detection of small reverse currents in battery backup and regenerative energy systems, supporting very low-value sense resistors without sacrificing sensitivity. The value is specified across the full –40°C to +125°C temperature range.
Does LTC4368HMS-2#PBF support AC input rejection?
Yes, the LTC4368HMS-2#PBF inherently blocks 50Hz and 60Hz AC power through its 32ms turn-on delay, which requires a sustained DC input voltage within the UV/OV window before enabling the external MOSFETs. This design prevents accidental connection to AC mains or transformer outputs, making it suitable for universal-input industrial equipment where miswiring risks exist.
How does the RETRY pin configure forward overcurrent recovery on LTC4368HMS-2#PBF?
On the LTC4368HMS-2#PBF, the RETRY pin selects between latch-off (RETRY grounded) and auto-retry (RETRY tied to capacitor) modes after a forward overcurrent fault. With a 22nF capacitor, the cooldown delay is ~120ms; the timing is linear at 5.5ms/nF. This allows system designers to match recovery behavior to fault persistence - e.g., latch-off for hard shorts, auto-retry for transient surges - without firmware intervention.
What is the maximum gate drive voltage provided by LTC4368HMS-2#PBF?
The LTC4368HMS-2#PBF provides up to 13.1V of gate drive enhancement above VOUT, measured as ΔVGATE = GATE – VOUT. This is guaranteed across the full input range (VIN = 12V to 60V) and temperature range (–40°C to +125°C), ensuring full enhancement of standard N-channel MOSFETs even at low VOUT or elevated temperatures - a key advantage over discrete solutions requiring external charge pumps.
Is LTC4368HMS-2#PBF qualified for automotive applications?
Yes, the LTC4368HMS-2#PBF is AEC-Q100 qualified for automotive applications with a temperature grade of –40°C to +125°C (Grade H). It meets stringent automotive reliability standards for humidity, thermal cycling, and ESD, and is manufactured under controlled processes suitable for use in engine control, body electronics, and ADAS subsystems where safety-critical power path integrity is required.
LTC4368HMS-2#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Voltage - Clamping:
- Adjustable
- Technology:
- External Switch
- Number of Circuits:
- 1
- Applications:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
LTC4368HMS-2#PBF FAQ
1.How can I place an order for LTC4368HMS-2#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4368HMS-2#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 LTC4368HMS-2#PBF reliable?
The price and inventory of LTC4368HMS-2#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4368HMS-2#PBF is usually 5 days.
3.What payment methods are accepted for LTC4368HMS-2#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4368HMS-2#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4368HMS-2#PBF?
LTC4368HMS-2#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4368HMS-2#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 LTC4368HMS-2#PBF?
For technical support, including LTC4368HMS-2#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4368HMS-2#PBF requirements.
6.How does Aetrix verify that LTC4368HMS-2#PBF is sourced from the original manufacturer or authorized distributors?
All LTC4368HMS-2#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 LTC4368HMS-2#PBF meets industry standards.
7.What is the process for return or replacement of LTC4368HMS-2#PBF?
All LTC4368HMS-2#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4368HMS-2#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 LTC4368HMS-2#PBF part is unused and in its original packaging.
Return procedure for LTC4368HMS-2#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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