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Analog Devices Inc. LTC4364CDE-2#PBF
- Part No.:
- LTC4364CDE-2#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 14-WFDFN Exposed Pad
- Datasheet:
-
LTC4364CDE-2#PBF.pdf
- Description:
- SURGE STOPPER W/DIODE 14DFN
- Quantity:
- Payment:
- Shipping:
Inventory:208
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Product details
Overview
LTC4364CDE-2#PBF from Analog Devices is a surge stopper with ideal diode controller for automotive and industrial power rails. It protects downstream loads from 200V/1ms transients, regulates output at adjustable clamp voltage (e.g., 27V), and drives two external N-channel MOSFETs-one for overvoltage/current limiting (HGATE), one for reverse-input protection and holdup (DGATE). Used in 12V/24V vehicle electronics during load dump.
For engineers reviewing the LTC4364CDE-2#PBF datasheet, LTC4364CDE-2#PBF pinout, LTC4364CDE-2#PBF application, or LTC4364CDE-2#PBF equivalent, key selection criteria include its 0.1% retry duty cycle during overvoltage faults, 10μA shutdown current, AEC-Q100 qualification, 4V–80V operating range, and automatic restart behavior distinguishing it from latch-off LTC4364-1 variants.
Technical Context
The LTC4364CDE-2#PBF integrates dual control loops: a voltage amplifier regulating HGATE to maintain 1.25V at FB during overvoltage, and a current-sense amplifier limiting ∆VSNS to 50mV (or 25mV during output short) by modulating HGATE. Fault timing is set via external capacitor on TMR, with distinct pull-up currents for overvoltage (–2.2µA typ.) vs. overcurrent (–210µA typ.) to accelerate turn-off under severe conditions.
Its ideal diode controller actively regulates DGATE to sustain ~30mV forward drop across the source-drain of M2, minimizing conduction loss while enabling fast reverse-current shutdown (<1.5µs DGATE turn-off delay). The device supports bidirectional fault response: HGATE and DGATE both pull low during UV, OV, or overcurrent faults, and DGATE remains clamped to SOURCE even when VCC is unpowered or reversed to –40V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 4V to 80V input; withstands –40V reverse input without damage |
| Output Clamp Regulation | Adjustable via FB divider; typical 27V clamp during 92V input surge |
| Fault Retry Duty Cycle | 0.1% (LTC4364-2 only); enables automatic recovery after cool-down timer completes 32 cycles |
| Shutdown Current | 10µA max at 12V; enables ultra-low-power system standby |
| Overcurrent Threshold | 50mV ∆VSNS (OUT–SENSE) with hysteresis; drops to 25mV if OUT < 1.5V for short-circuit hardening |
| Package | 14-lead (4mm × 3mm) DFN with exposed pad; θJA = 45°C/W |
| AEC-Q100 Grade | Commercial temperature range (0°C to 70°C); C-grade variant |
Pinout & Package
Package: 14-lead plastic DFN (4mm × 3mm), exposed pad (Pin 15) optional GND connection. Pinout validated per Analog Devices Rev. B datasheet (DE package top view).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT (Pin 1) | Output voltage sense input | Senses drain of HGATE-controlled MOSFET; ENOUT asserts high-Z when VOUT > VCC − 0.7V |
| SENSE (Pin 2) | Current sense input | Monitors voltage across external sense resistor; triggers overcurrent protection at 50mV |
| DGATE (Pin 3) | Ideal diode gate drive output | Drives second N-MOSFET for reverse-input protection; regulates ~30mV forward drop |
| SOURCE (Pin 4) | Common source reference | Return node for both MOSFET sources; defines anode of ideal diode path |
| HGATE (Pin 5) | Surge stopper gate drive output | Controls primary N-MOSFET pass device; regulates output voltage and limits current |
| VCC (Pin 6) | Positive supply input | Power rail for internal circuitry; operates from 4V–80V; tolerates –40V reverse |
| SHDN (Pin 7) | Shutdown control input | Pull <0.5V to reduce ICC to 10µA; open or pull >2.2V to enable |
| UV (Pin 8) | Undervoltage comparator input | 1.25V threshold; pulls HGATE low if violated; resets latch only on LTC4364-1 |
| OV (Pin 9) | Overvoltage comparator input | 1.25V threshold; inhibits auto-retry during overvoltage fault |
| GND (Pin 10) | Device ground | Reference for all internal circuits and open-drain outputs (FLT, ENOUT) |
| FLT (Pin 11) | Fault indicator output | Open-drain; pulls low at TMR = 1.25V warning; sinks 2mA, withstands 80V |
| ENOUT (Pin 12) | Enable output | Open-drain; high-Z when VOUT > VCC − 0.7V; latched, resets at VOUT < 2.2V |
| TMR (Pin 13) | Fault timer capacitor node | Charged by fault current sources; thresholds at 1.25V (warn), 1.35V (turn-off), 0.15V (retry) |
| FB (Pin 14) | Voltage regulation feedback | 1.25V reference point; sets output clamp voltage via resistive divider to OUT |
Key Features
| Feature | Design Value |
|---|---|
| Auto-restart after fault timeout | LTC4364-2 variant performs 32-cycle cool-down timer (0.15V ↔ 1.35V) before re-enabling HGATE if OV is clear |
| Reverse input protection | Withstands –40V at VCC; DGATE actively shuts off M2 within 1.5µs if reverse voltage exceeds –30mV |
| Output holdup during input short | Ideal diode maintains VOUT using stored energy in output capacitors; no Schottky drop penalty |
| Adjustable overvoltage clamp | Set via FB divider; precise 1.25V internal reference enables stable 27V clamp even under 92V transient |
| Low-power shutdown mode | 10µA ICC(SHDN) enables battery-backed systems to maintain protection without draining supply |
Applications
| Automotive Load Dump Protection | Redundant Supply ORing |
|---|---|
|
Use Scenario: 12V vehicle electrical system subjected to ISO 7637-2 load dump transients up to 120V. IC Role / Device Role / Timing Role: LTC4364CDE-2#PBF regulates output to 27V, sustains load operation, and auto-restarts after transient clears. Use Value: Prevents ECU reset or component damage during engine-off-to-on transitions; eliminates need for external TVS clamping. |
Use Scenario: Dual 24V DC power supplies feeding common bus with seamless switchover. IC Role / Device Role / Timing Role: LTC4364CDE-2#PBF controls back-to-back N-MOSFETs as ideal diodes, enabling ORing with <30mV forward drop. Use Value: Reduces heat generation vs. Schottky diodes; supports hot-swap insertion without bus disruption. |
| Industrial Hot-Swap Port | Avionic Power Sequencing |
|
Use Scenario: Field-replaceable module inserted into live 48V telecom rack with surge risk. IC Role / Device Role / Timing Role: LTC4364CDE-2#PBF limits inrush, clamps surges, and holds output during connector arcing. Use Value: Enables safe live insertion without brownout; 0.1% retry duty cycle prevents oscillation during marginal faults. |
Use Scenario: Aircraft power distribution unit requiring reverse-polarity immunity and fault containment. IC Role / Device Role / Timing Role: LTC4364CDE-2#PBF provides –40V reverse input tolerance, bidirectional fault shutdown, and AEC-Q100 compliance. Use Value: Meets DO-160 Section 22 surge requirements; eliminates single-point failure from input reversal. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar surge protection and ideal diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4364CDE-1#PBF | Latches off HGATE after fault timeout; no auto-restart; identical pinout and specs otherwise | Preferred where permanent fault lockout is required (e.g., safety-critical shutdown) | Select LTC4364CDE-1#PBF when system must remain disabled until manual reset after overvoltage event |
| TPS26632RGER | Single-channel eFuse with integrated MOSFET; no ideal diode function; 60V abs max; no reverse input rating | Used for overcurrent-only protection in space-constrained designs without reverse polarity needs | Choose TPS26632RGER only if reverse-input protection and output holdup are not required and board area is critical |
Compared with LTC4364CDE-1#PBF and TPS26632RGER, the LTC4364CDE-2#PBF uniquely combines auto-restart capability, –40V reverse input tolerance, and dual-MOSFET ideal diode control-enabling uninterrupted operation in automotive load dump and redundant supply ORing where recovery without intervention is essential.
Availability
LTC4364CDE-2#PBF is available at Aetrix Electronics and suitable for automotive load dump protection, redundant supply ORing, and industrial hot-swap port applications requiring stable component supply, AEC-Q100 qualification, and guaranteed long-term availability.
Supply support for LTC4364CDE-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 precision instrumentation, industrial automation, and automotive markets.
The LTC4364 family was designed specifically for robust front-end power protection in harsh environments-delivering surge suppression, ideal diode functionality, and fault management in a single IC for 4V–80V systems.
FAQ
What is the key functional difference between LTC4364CDE-2#PBF and LTC4364CDE-1#PBF?
The LTC4364CDE-2#PBF implements automatic restart after fault timeout: once the TMR capacitor completes its 32-cycle cool-down (0.15V ↔ 1.35V), HGATE re-enables if OV is below threshold. In contrast, the LTC4364CDE-1#PBF latches HGATE off permanently until SHDN or UV is cycled. Both share identical pinout, package, and protection specs.
Does LTC4364CDE-2#PBF support reverse battery protection?
Yes. The LTC4364CDE-2#PBF withstands –40V at VCC without damage and actively disables both HGATE and DGATE when SOURCE falls below GND, blocking reverse current flow. Its ideal diode controller also shuts off M2 within 1.5µs if reverse voltage exceeds –30mV, ensuring robust reverse-input protection.
How is the output clamp voltage set for LTC4364CDE-2#PBF?
The output clamp voltage is set by a resistive divider from OUT to GND connected to the FB pin. The LTC4364CDE-2#PBF regulates to maintain 1.25V at FB; for example, a 27V clamp uses R1 = 383kΩ and R2 = 10kΩ (27V = 1.25V × (383k/10k + 1)). The FB reference exhibits ±0.03V tolerance over temperature.
What is the maximum transient voltage LTC4364CDE-2#PBF can survive?
The LTC4364CDE-2#PBF is specified to withstand 200V/1ms transients at VIN, as verified in typical application circuits. Its internal architecture-including VCC clamping, fault timer acceleration under high VCC–VOUT differential, and SOA-aware turn-off-ensures survival of automotive load dump events exceeding ISO 7637-2 Pulse 5a requirements.
Can LTC4364CDE-2#PBF drive logic-level MOSFETs?
Yes. The LTC4364CDE-2#PBF provides ≥10V gate drive above SOURCE for both HGATE and DGATE (up to 12V clamped), sufficient to fully enhance standard logic-level N-channel MOSFETs. Its 130mA DGATE pull-down ensures rapid turn-off even with high gate charge devices, critical for reverse-current suppression.
LTC4364CDE-2#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 14-WFDFN Exposed Pad
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Voltage - Clamping:
- Adjustable
- Technology:
- External Switch
- Number of Circuits:
- 1
- Applications:
- General Purpose
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-DFN (4x3)
LTC4364CDE-2#PBF FAQ
1.How can I place an order for LTC4364CDE-2#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4364CDE-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 LTC4364CDE-2#PBF reliable?
The price and inventory of LTC4364CDE-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 LTC4364CDE-2#PBF is usually 5 days.
3.What payment methods are accepted for LTC4364CDE-2#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4364CDE-2#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4364CDE-2#PBF?
LTC4364CDE-2#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4364CDE-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 LTC4364CDE-2#PBF?
For technical support, including LTC4364CDE-2#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4364CDE-2#PBF requirements.
6.How does Aetrix verify that LTC4364CDE-2#PBF is sourced from the original manufacturer or authorized distributors?
All LTC4364CDE-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 LTC4364CDE-2#PBF meets industry standards.
7.What is the process for return or replacement of LTC4364CDE-2#PBF?
All LTC4364CDE-2#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4364CDE-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 LTC4364CDE-2#PBF part is unused and in its original packaging.
Return procedure for LTC4364CDE-2#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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