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Analog Devices Inc. LTC4368CMS-2#PBF
- Part No.:
- LTC4368CMS-2#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC4368CMS-2#PBF.pdf
- Description:
- IC SURGE SUPPRESSION ADJ 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,291
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Product details
Overview
LTC4368CMS-2#PBF from Analog Devices is a bidirectional electronic circuit breaker and UV/OV protection controller for 2.5V–60V input supplies, featuring –3mV reverse overcurrent threshold, ±1.5% adjustable UV/OV thresholds, and gate drive control for back-to-back N-channel MOSFETs in automotive surge protection and energy storage systems.
For engineers reviewing the LTC4368CMS-2#PBF datasheet, LTC4368CMS-2#PBF pinout, LTC4368CMS-2#PBF application, or LTC4368CMS-2#PBF equivalent, key selection considerations include reverse current fault sensitivity (–3mV), 32ms turn-on debounce, AEC-Q100 qualification, MSOP-10 package thermal performance (θJA = 160°C/W), and latch-off vs auto-retry configuration via RETRY pin.
Technical Context
The LTC4368CMS-2#PBF integrates dual high-accuracy comparators (UV/OV) with 25mV hysteresis and fast 1µs propagation, plus forward/reverse overcurrent comparators referenced to SENSE–VOUT. Its charge pump delivers up to 13.1V gate enhancement above VOUT while supporting reverse battery protection down to –40V.
It implements 32ms recovery delay after UV/OV faults and uses internal 60mA GATE pull-down sinks for rapid MOSFET turn-off. The RETRY pin configures forward overcurrent response as either latch-off (grounded) or auto-retry (capacitor-timed), while reverse re-enable requires VIN–VOUT ≥ 75mV (typ).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 60V operating; –40V to 100V fault protection range enables robust handling of reverse battery and AC line transients |
| Reverse OC Threshold | –3mV (SENSE–VOUT) - optimized for low-loss reverse current detection in high-current energy storage systems |
| UV/OV Threshold Accuracy | ±1.5% - allows precise power-good window setting (e.g., 7V–36V) using external resistor dividers |
| Quiescent Current | 80µA typical - supports always-on monitoring in battery-backed instrumentation without significant drain |
| GATE Drive Range | Up to 13.1V above VOUT - ensures full enhancement of standard N-channel MOSFETs across full VIN range |
| Turn-On Delay | 32ms - debounces live supply connections and blocks 50/60Hz AC power by rejecting short-duration transients |
| Package | 10-Lead Plastic MSOP - surface-mount footprint with exposed pad option; θJA = 160°C/W for thermal management in compact layouts |
Pinout & Package
10-Lead Plastic MSOP (LTGTJ marking), RoHS-compliant, lead-free finish. Exposed pad optional for PCB ground connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power supply input | Accepts –40V to 100V; includes 2.2V UVLO and hot-swap capability |
| UV | Undervoltage comparator input | 0.5V falling threshold with 25mV hysteresis; connects to resistive divider for user-defined lower voltage limit |
| OV | Overvoltage comparator input | 0.5V rising threshold with 25mV hysteresis; sets upper voltage trip point independently of UV |
| RETRY | Forward OC response mode select | Ground = latch-off; capacitor = auto-retry timer (5.5ms/nF); open = default latch-off |
| GND | Device ground reference | Common return for internal circuits and external sense resistor |
| GATE | MOSFET gate driver output | Charge pump output driving back-to-back N-MOSFET gates; pulls down at 60mA during faults |
| SENSE | Current sense input | Detects forward (+50mV) and reverse (–3mV) overcurrent via external RSENSE between SENSE and VOUT |
| VOUT | Output voltage sense | Reference for GATE charge pump; must rise >2.2V before reverse fault recovery enabled |
| FAULT | Open-drain fault indicator | Pulled low on UV/OV/OC faults or SHDN assertion; requires external pull-up |
| SHDN | Shutdown control input | Active-low enable; <0.75V disables GATE drive and reduces current to 5µA |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional overcurrent protection | Separate +50mV (forward) and –3mV (reverse) thresholds enable independent optimization for load-to-source and source-to-load fault detection |
| AC line blocking | 32ms turn-on delay inherently rejects 50Hz/60Hz AC inputs by requiring sustained DC presence before enabling power path |
| Reverse battery protection | Automatic isolation at VIN ≤ –40V with no external components; GATE tracks VIN when negative to prevent body diode conduction |
| AEC-Q100 qualified variants | LTC4368IMS-2#PBF and LTC4368HMS-2#PBF meet automotive reliability standards for under-hood and infotainment applications |
| Low-power shutdown mode | 5µA shutdown current enables long-term storage or battery backup operation without significant leakage |
Applications
| Automotive Battery Protection | Industrial Energy Storage System |
|---|---|
Use Scenario: Preventing damage from reversed battery installation or jump-start polarity errors in 12V/24V vehicle electronics. IC Role / Device Role / Timing Role: Controller for back-to-back N-MOSFETs that isolates load from VIN during reverse voltage or overcurrent events. Use Value: Eliminates need for bulky Schottky diodes; supports –40V reverse protection and 32ms debounce prevents false triggering from cranking transients. | Use Scenario: Safeguarding Li-ion battery banks against overvoltage, undervoltage, and bidirectional fault currents during charge/discharge cycles. IC Role / Device Role / Timing Role: Dual-threshold UV/OV supervisor and bidirectional circuit breaker managing power flow between battery and DC bus. Use Value: ±1.5% threshold accuracy ensures tight voltage window enforcement; –3mV reverse OC threshold detects subtle leakage or partial short conditions early. |
| Portable Test Instrumentation | Hot-Swappable Power Module |
Use Scenario: Protecting precision analog front-ends in handheld meters from accidental connection to overvoltage adapters or miswired supplies. IC Role / Device Role / Timing Role: Input supervisor enforcing 3.5V–18V valid window while blocking reverse current from internal batteries. Use Value: 80µA operating current extends battery life; low-leakage UV/OV inputs allow high-value resistor dividers minimizing power loss. | Use Scenario: Enabling safe insertion/removal of power modules in modular server or telecom chassis without disrupting system operation. IC Role / Device Role / Timing Role: Hot-swap controller with 32ms debounce and fault-latched power path enabling controlled ramp-up and graceful fault isolation. Use Value: RETRY pin configurable for auto-retry (capacitor) or hard latch-off (ground), supporting both self-healing and fail-safe system architectures. |
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 |
|---|---|---|---|
| LTC4368IMS-2#PBF | Same functionality and pinout; –40°C to 85°C extended temperature grade vs. 0°C to 70°C for LTC4368CMS-2#PBF | Suitable for industrial environments with wider ambient temperature swings | Select when operating beyond commercial temperature range is required; otherwise LTC4368CMS-2#PBF suffices for office/indoor use |
| TPS26631RGER | Single-direction (forward-only) protection IC; lacks reverse voltage/current protection and –3mV reverse OC threshold | Applicable only where reverse faults are not a concern (e.g., fixed-polarity DC distribution) | Choose only if reverse protection is unnecessary; LTC4368CMS-2#PBF provides broader fault coverage including AC blocking and reverse battery |
Compared with LTC4368IMS-2#PBF, the LTC4368CMS-2#PBF offers identical electrical performance but reduced temperature range, lowering cost for non-extended-environment designs; versus TPS26631RGER, it adds critical reverse protection and AC rejection-features essential for automotive and energy storage where polarity reversal and line noise are common failure modes.
Availability
LTC4368CMS-2#PBF is available at Aetrix Electronics and suitable for automotive battery protection, industrial energy storage systems, portable instrumentation, and hot-swappable power modules requiring stable component supply and AEC-Q100-aligned reliability.
Supply support for LTC4368CMS-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 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 overvoltage, undervoltage, and bidirectional overcurrent protection for demanding power-supply interfaces-designed specifically for automotive surge resilience, battery backup integrity, and ruggedized industrial power entry.
FAQ
What is the reverse overcurrent threshold of the LTC4368CMS-2#PBF?
The LTC4368CMS-2#PBF has a reverse overcurrent threshold of –3mV (SENSE–VOUT), which is factory-configured and distinct from the –50mV threshold of the LTC4368-1 variant. This low-magnitude threshold enables sensitive detection of small reverse leakage currents in energy storage and battery backup applications, improving system safety without requiring oversized sense resistors.
Does the LTC4368CMS-2#PBF support AEC-Q100 qualification?
The LTC4368CMS-2#PBF itself is rated for 0°C to 70°C and is not AEC-Q100 qualified; however, the pin-compatible LTC4368IMS-2#PBF (–40°C to 85°C) and LTC4368HMS-2#PBF (–40°C to 125°C) are explicitly qualified to AEC-Q100 Rev H Grade 2 and Grade 1 respectively. For automotive deployment, specify one of those variants instead of the LTC4368CMS-2#PBF.
How does the LTC4368CMS-2#PBF handle AC input signals?
The LTC4368CMS-2#PBF blocks 50Hz and 60Hz AC power through its 32ms turn-on delay, which requires sustained DC input above the UV threshold before enabling the GATE driver. Since AC waveforms spend time below the UV threshold every half-cycle, the device never exits the startup debounce state and keeps the external MOSFETs off-effectively acting as an AC rejection filter without external components.
Can the LTC4368CMS-2#PBF be used with only forward overcurrent protection?
Yes-the LTC4368CMS-2#PBF supports forward-only use by connecting SENSE directly to VOUT (bypassing the sense resistor), leaving the reverse OC comparator inactive. However, doing so forfeits reverse polarity and reverse current protection. For full bidirectional protection, a sense resistor must be placed between SENSE and VOUT per the datasheet layout guidelines.
What is the maximum gate drive voltage the LTC4368CMS-2#PBF can deliver?
The LTC4368CMS-2#PBF delivers up to 13.1V of gate drive above VOUT (ΔVGATE) when VIN ≥ 12V, sufficient to fully enhance standard N-channel MOSFETs with VGS(th) ≤ 3V. At lower VIN (e.g., 2.5V), gate drive drops to 3V minimum-requiring logic-level MOSFETs for reliable operation across the full 2.5V–60V input range.
LTC4368CMS-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:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
LTC4368CMS-2#PBF FAQ
1.How can I place an order for LTC4368CMS-2#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4368CMS-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 LTC4368CMS-2#PBF reliable?
The price and inventory of LTC4368CMS-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 LTC4368CMS-2#PBF is usually 5 days.
3.What payment methods are accepted for LTC4368CMS-2#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4368CMS-2#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4368CMS-2#PBF?
LTC4368CMS-2#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4368CMS-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 LTC4368CMS-2#PBF?
For technical support, including LTC4368CMS-2#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4368CMS-2#PBF requirements.
6.How does Aetrix verify that LTC4368CMS-2#PBF is sourced from the original manufacturer or authorized distributors?
All LTC4368CMS-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 LTC4368CMS-2#PBF meets industry standards.
7.What is the process for return or replacement of LTC4368CMS-2#PBF?
All LTC4368CMS-2#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4368CMS-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 LTC4368CMS-2#PBF part is unused and in its original packaging.
Return procedure for LTC4368CMS-2#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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