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Analog Devices Inc. LT8672IMS#TRPBF
- Part No.:
- LT8672IMS#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Gate Drivers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LT8672IMS#TRPBF.pdf
- Description:
- IC GATE DRVR HIGH-SIDE 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,121
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Product details
Overview
LT8672IMS#TRPBF from Analog Devices is an AEC-Q100 qualified active rectifier controller for automotive reverse battery protection and input ripple rectification. It drives an external N-channel MOSFET to replace Schottky diodes, delivering 20mV forward drop, 3V–42V operating range, and 100kHz AC ripple rectification capability in a 10-lead MSOP package. Used in 12V automotive ECUs for cold-crank robustness and load-dump survival.
For engineers reviewing the LT8672IMS#TRPBF datasheet, LT8672IMS#TRPBF pinout, LT8672IMS#TRPBF application, or LT8672IMS#TRPBF equivalent, key selection criteria include reverse input protection to –40V, ultrafast gate turn-on/off times (<3.1µs / <1.1µs), 20µA operating quiescent current, integrated auxiliary boost regulator (11V above DRAIN), and power-good signaling for system-level fault management.
Technical Context
The LT8672IMS#TRPBF implements dual-path gate control: a precision 20mV SOURCE–DRAIN regulation loop for steady-state conduction and independent fast pull-up (75mV threshold) and fast pull-down (–70mV threshold) comparators for transient response up to 100kHz. Its auxiliary boost regulator uses hysteretic switching with 100mA current limit to generate a stable 11V gate drive offset referenced to DRAIN.
Operation includes EN/UVLO shutdown (3.5µA IQ), open-drain PG output indicating AUX regulation readiness and FPU timeout, and full –40V reverse voltage tolerance on SOURCE/EN pins. The IC supports logic-level and standard-threshold N-MOSFETs and requires no bypass capacitor at SOURCE-capacitance >60nF risks instability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Forward Regulation Voltage | 20mV typical - enables cold-crank operation down to ~3.2V input without buck-boost conversion |
| Operating Input Range | 3V to 42V - covers full automotive battery range including load dump (42V) and cold crank (3.2V) |
| Reverse Input Rating | –40V on SOURCE/EN - withstands reverse battery connection without damage or latch-up |
| Quiescent Current | 20µA typical in operation - minimizes parasitic drain on vehicle battery during sleep mode |
| Shutdown Current | 3.5µA maximum - meets automotive low-power requirements for extended parking |
| AC Ripple Handling | Rectifies 2VP-P up to 100kHz - satisfies ISO16750-2 and LV124 ECU ripple immunity specs |
| Gate Drive Capability | 300mA pull-down / 50mA pull-up - ensures sub-microsecond MOSFET switching for low body-diode conduction |
Pinout & Package
LT8672IMS#TRPBF is housed in a 10-lead plastic MSOP package (3mm × 3mm, 0.5mm pitch) with exposed thermal pad not connected internally. Pin 11 (exposed pad) is absent in MSOP; only DFN variants include it.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN/UVLO (Pin 1) | Enable and undervoltage lockout input | Shuts down entire IC below 1.21V threshold; tied to DRAIN if unused - enables programmable UVLO via resistor divider |
| GND (Pin 2) | No-function ground | Must be connected to PCB ground but carries no internal current - distinct from Pin 4 (power ground) |
| PG (Pin 3) | Open-drain power-good indicator | Pulls low during startup until AUX reaches regulation, during shutdown, or if fast pull-up remains active >17µs - used for load enable/disable sequencing |
| GND (Pin 4) | Primary power ground | Return path for all internal circuitry - must tie directly to local GND plane with low-inductance connection |
| NC (Pin 5) | No-connect terminal | Internally unconnected - may be left floating or grounded per layout convenience |
| AUXSW (Pin 6) | Auxiliary boost regulator switch node | Drives external boost inductor to DRAIN - requires minimal PCB trace area to reduce EMI and ringing |
| AUX (Pin 7) | Auxiliary boost output | Provides 11V regulated gate drive offset above DRAIN - requires 1µF ceramic capacitor to DRAIN, placed adjacent to IC |
| DRAIN (Pin 8) | Input voltage sense and supply rail | Senses input voltage for regulation and powers internal circuitry - must be bypassed with ≥4.7µF low-ESR capacitor |
| SOURCE (Pin 9) | MOSFET source reference and return | Sense node for SOURCE–DRAIN regulation and fast pull-down comparator - connects directly to MOSFET source; capacitance ≤60nF required |
| GATE (Pin 10) | MOSFET gate driver output | Drives external N-MOSFET gate with ±300mA peak current - connects directly to MOSFET gate with short, low-inductance trace |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualification | Qualified for automotive Grade I (–40°C to +125°C junction), enabling use in engine bay and ECU applications |
| Integrated auxiliary boost regulator | Generates stable 11V gate drive offset referenced to DRAIN - eliminates need for external charge pump or bias supply |
| Ultrafast transient response | 1.7µs gate turn-on / 0.6µs gate turn-off delays - reduces MOSFET body-diode conduction time during ripple events |
| Reverse input protection | Withstands –40V on SOURCE/EN pins - protects against reverse battery connection without external TVS clamping |
| Power Good (PG) monitoring | Open-drain flag signals AUX regulation status and FPU timeout - enables safe load enable sequencing and fault isolation |
Applications
| Automotive Battery Protection | Industrial Power Supplies |
|---|---|
Use Scenario: 12V automotive ECU subjected to cold crank (3.2V), load dump (42V), and reverse battery (–14.4V). IC Role / Device Role / Timing Role: Active rectifier controller replacing Schottky diode in input stage - regulates MOSFET to maintain 20mV forward drop during cranking. Use Value: Enables use of efficient buck regulators instead of buck-boost by preserving >3V input headroom; reduces power loss by >90% vs. SBG2040CT diode. | Use Scenario: Industrial 24V DC power distribution system requiring reverse polarity protection and high-efficiency input rectification. IC Role / Device Role / Timing Role: Controls external N-MOSFET as ideal diode in redundant power input path - handles up to 42V input with –40V reverse tolerance. Use Value: Eliminates thermal derating and heatsink requirements associated with Schottky diodes; supports compact, fanless enclosure designs. |
| Portable Instrumentation | Automotive ECU Ripple Rectification |
Use Scenario: Battery-powered handheld test equipment with USB-C and Li-ion backup inputs requiring seamless source arbitration and reverse protection. IC Role / Device Role / Timing Role: Dual-input ideal diode controller - selects highest-voltage source while blocking reverse current flow between inputs. Use Value: Prevents cross-conduction and backfeeding; maintains <20µA quiescent current in sleep mode to extend battery life. | Use Scenario: Automotive ADAS camera module subjected to 6VP-P @ 30kHz ripple per ISO16750-2. IC Role / Device Role / Timing Role: High-speed active rectifier - rapidly switches external MOSFET to clamp ripple with minimal body-diode conduction. Use Value: Reduces RMS current in output capacitor by >40%, lowering electrolytic capacitor temperature rise and extending lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar active rectifier controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM74700QDDARQ1 | Lower 2.5V min input; 15mV regulation; no integrated boost - requires external gate drive supply | Better suited for ultra-low-voltage systems (e.g., 5V rail); lacks 100kHz ripple capability | Select LM74700QDDARQ1 when input stays >2.5V and external 5V/3.3V bias is available; avoid for 12V automotive cold-crank. |
| TPS26631PWPR | Integrated 42V N-FET; fixed 35mV drop; no ripple rectification support; 1.2ms turn-on delay | Single-chip solution for basic reverse protection; insufficient for ISO16750 ripple compliance | Choose TPS26631PWPR for space-constrained designs needing simplicity over performance; not suitable for ECU-grade ripple handling. |
Compared with LM74700QDDARQ1 and TPS26631PWPR, the LT8672IMS#TRPBF uniquely combines integrated auxiliary boost, 20mV regulation, –40V reverse rating, and 100kHz ripple rectification - making it the only option qualified for demanding automotive ECU input stages requiring both cold-crank headroom and high-frequency immunity.
Availability
LT8672IMS#TRPBF is available at Aetrix Electronics and suitable for automotive battery protection, industrial power supplies, portable instrumentation, and automotive ECU ripple rectification requiring stable component supply across production lifecycles.
Supply support for LT8672IMS#TRPBF 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 automotive, industrial, communications, and healthcare markets.
The LT8672IMS#TRPBF belongs to Analog Devices' Power by Linear™ active rectifier controller family, designed specifically for AEC-Q100-compliant automotive power management where ultra-low dropout, reverse protection, and high-frequency ripple immunity are critical.
FAQ
What is the minimum input voltage required for LT8672IMS#TRPBF to start up and regulate?
The LT8672IMS#TRPBF requires a minimum DRAIN voltage of 2.85V to initiate startup. Once enabled, it operates continuously from 3V to 42V. Internal supply voltages stabilize within ~7ms after DRAIN exceeds 2.85V, after which the auxiliary boost regulator begins charging AUX and the PG pin asserts high impedance when regulation is achieved.
Does LT8672IMS#TRPBF require an external capacitor on the SOURCE pin?
No, the LT8672IMS#TRPBF does not require a bypass capacitor on the SOURCE pin. In fact, total capacitance connected to SOURCE must not exceed 60nF - exceeding this value risks gate driver instability. Any EMI filter capacitor placed at SOURCE for other reasons must be strictly limited to ≤60nF.
How does LT8672IMS#TRPBF handle reverse battery conditions?
The LT8672IMS#TRPBF withstands –40V on SOURCE and EN/UVLO pins without damage. When SOURCE goes negative, its internal circuitry pulls GATE to SOURCE, turning off the external MOSFET and isolating DRAIN from the reverse input. This provides true reverse polarity protection without external TVS diodes in many cases.
Can LT8672IMS#TRPBF drive logic-level MOSFETs?
Yes, the LT8672IMS#TRPBF is compatible with both standard-threshold and logic-level N-channel MOSFETs across its full 3V–42V input range. For logic-level devices, VGS(MAX) should be ≥±15V to accommodate the 11V gate drive offset provided by the integrated auxiliary boost regulator.
What is the function of the PG pin on LT8672IMS#TRPBF?
The PG (Power Good) pin on LT8672IMS#TRPBF is an open-drain output that goes high-impedance only when the auxiliary boost regulator has reached regulation, the device is not in shutdown, and the fast pull-up path has been inactive for ≤17µs. It signals that the external MOSFET is ready to safely carry load current and is commonly used to enable downstream circuitry.
LT8672IMS#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Driven Configuration:
- -
- Channel Type:
- Single
- Number of Drivers:
- 1
- Gate Type:
- N-Channel MOSFET
- Voltage - Supply:
- 3V ~ 42V
- Logic Voltage - VIL, VIH:
- -
- Current - Peak Output (Source, Sink):
- -
- Input Type:
- Non-Inverting
- High Side Voltage - Max (Bootstrap):
- -
- Rise / Fall Time (Typ):
- -
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
LT8672IMS#TRPBF FAQ
1.How can I place an order for LT8672IMS#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8672IMS#TRPBF 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 LT8672IMS#TRPBF reliable?
The price and inventory of LT8672IMS#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8672IMS#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8672IMS#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8672IMS#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8672IMS#TRPBF?
LT8672IMS#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8672IMS#TRPBF 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 LT8672IMS#TRPBF?
For technical support, including LT8672IMS#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8672IMS#TRPBF requirements.
6.How does Aetrix verify that LT8672IMS#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8672IMS#TRPBF 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 LT8672IMS#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8672IMS#TRPBF?
All LT8672IMS#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8672IMS#TRPBF, 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 LT8672IMS#TRPBF part is unused and in its original packaging.
Return procedure for LT8672IMS#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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