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Analog Devices Inc. LT8672HMS#PBF
- Part No.:
- LT8672HMS#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Gate Drivers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LT8672HMS#PBF.pdf
- Description:
- IC GATE DRVR HIGH-SIDE 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:148
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Product details
Overview
LT8672HMS#PBF 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 regulation voltage, 3V–42V input range, and ultrafast transient response up to 100kHz (2VP-P). It enables cold-crank operation down to 3.2V battery voltage in 12V automotive ECUs.
For engineers reviewing the LT8672HMS#PBF datasheet, LT8672HMS#PBF pinout, LT8672HMS#PBF application, or LT8672HMS#PBF equivalent, key selection criteria include reverse input protection to –40V, 3.5µA shutdown current, integrated auxiliary boost regulator (11V above DRAIN), power good (PG) signaling, and MSOP-10 package compatibility with automotive thermal and layout constraints.
Technical Context
The LT8672HMS#PBF implements a dual-path gate control architecture: a precision 20mV forward-voltage regulation loop for steady-state conduction and independent fast pull-up/fast pull-down comparators for sub-microsecond transient response to AC ripple up to 100kHz. Its integrated auxiliary boost regulator delivers regulated 11V gate drive referenced to DRAIN, enabling full enhancement of logic-level N-MOSFETs across the full 3V–42V input range.
Operation includes EN/UVLO with 1.21V threshold and 70mV hysteresis, open-drain PG output indicating AUX regulation readiness and fault conditions, and robust protection against –40V reverse input on SOURCE/EN/UVLO pins. The device is rated for –40°C to 150°C junction temperature, meeting AEC-Q100 H-grade requirements for under-hood automotive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Forward Regulation Voltage | 20mV - Enables cold-crank operation at ≤3.2V battery by minimizing voltage drop across external MOSFET. |
| Input Voltage Range | 3V to 42V - Supports full automotive battery range including load dump (42V) and cold crank (3.2V). |
| Reverse Input Protection | –40V on SOURCE/EN/UVLO - Survives reverse battery connection without damage or latch-up. |
| Quiescent Current | 20µA typical in operation - Minimizes standby power loss in always-on vehicle modules. |
| Shutdown Current | 3.5µA - Reduces system leakage during ignition-off; EN/UVLO pin controls entry/exit. |
| AC Ripple Rectification | Up to 100kHz at 2VP-P - Meets ISO16750/LV124 ECU ripple immunity requirements without body-diode conduction. |
| AUX Boost Regulation | 11V above DRAIN - Provides sufficient gate overdrive for low-RDS(ON) N-MOSFETs even at 3V input. |
| Operating Temperature | –40°C to 150°C - Qualified per AEC-Q100 H-grade for engine compartment deployment. |
Pinout & Package
LT8672HMS#PBF is housed in a 10-lead plastic MSOP package (3mm × 3mm), thermally enhanced with exposed pad (pin 11 not present in MSOP variant). Pin functions are validated per Analog Devices Rev. E datasheet and match MSOP pinout configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN/UVLO (1) | Enable / Undervoltage Lockout Input | Shuts down controller and boost regulator when <1.21V; 70mV hysteresis prevents chatter during brownout. |
| GND (2) | No-function Ground | Unused internal node; connect to PCB ground plane for mechanical stability only. |
| PG (3) | Power Good Open-Drain Output | Pulls low if AUX not regulated, shutdown active, or fast pull-up active >17µs - signals MOSFET readiness to load. |
| GND (4) | Main Internal Ground Reference | Primary return path for all internal circuitry; must tie directly to local GND plane with low-inductance connection. |
| NC (5) | No Connect | Internally unconnected; may be left floating or tied to GND for mechanical reinforcement. |
| AUXSW (6) | Auxiliary Boost Regulator Switch Node | Drives external boost inductor; requires minimal PCB trace area to limit EMI and switching losses. |
| AUX (7) | Auxiliary Boost Output | Provides 11V gate drive referenced to DRAIN; requires 1µF ceramic capacitor to DRAIN, placed adjacent to IC. |
| DRAIN (8) | Input Voltage Sense & Supply | Senses input rail for regulation; powers internal circuitry; must be bypassed with ≥4.7µF low-ESR capacitor. |
| SOURCE (9) | MOSFET Source Sense & Return | Reference for forward-voltage regulation and fast pull-down; withstands –40V reverse transients. |
| GATE (10) | MOSFET Gate Drive Output | Delivers ±300mA peak drive to external N-MOSFET gate; supports fast turn-on (<3.1µs) and turn-off (<1.1µs). |
Key Features
| Feature | Design Value |
|---|---|
| 20mV Forward Regulation | Reduces minimum input voltage requirement during cold crank, eliminating need for buck-boost converters in 12V systems. |
| Integrated Auxiliary Boost Regulator | Generates stable 11V gate drive referenced to DRAIN, enabling use of low-cost logic-level N-MOSFETs across full 3V–42V input range. |
| Ultrafast Transient Response | Sub-microsecond gate turn-on/turn-off delays (1.7µs/0.6µs) and dedicated FPU/FPD paths rectify 100kHz ripple without body-diode conduction. |
| AEC-Q100 H-Grade Qualification | Guaranteed operation from –40°C to 150°C junction temperature, supporting under-hood placement in modern automotive ECUs. |
| Reverse Input Protection to –40V | Protects downstream circuitry from reverse battery events while maintaining zero forward voltage penalty vs. passive diodes. |
| Power Good (PG) Monitoring | Open-drain PG pin provides system-level fault indication for AUX regulation failure, shutdown state, or extended fast-pull-up activation. |
Applications
| Automotive Battery Protection | Industrial Power Supplies |
|---|---|
Use Scenario: 12V automotive ECU subjected to reverse battery connection, load dump (42V), and cold crank (3.2V). IC Role / Device Role / Timing Role: Active rectifier controller replacing Schottky diode in input stage to eliminate 300–400mV forward drop and associated thermal stress. Use Value: Enables reliable operation at 3.2V battery with 20mV drop, reducing required input headroom by >350mV and eliminating need for buck-boost conversion. | Use Scenario: 24V industrial PLC power input exposed to long cable inductance and field-induced transients. IC Role / Device Role / Timing Role: Reverse polarity and overvoltage protector using external MOSFET, with fast transient suppression for EMI-sensitive analog front-ends. Use Value: Withstands –40V reverse input and 42V surges while maintaining <20mV conduction loss, improving efficiency and thermal margin over TVS+diode solutions. |
| Portable Instrumentation | Automotive Input Ripple Rectification |
Use Scenario: Battery-powered handheld test equipment requiring low-quiescent-power reverse protection during USB/charger input switching. IC Role / Device Role / Timing Role: Low-IQ (20µA) active rectifier enabling always-on monitoring mode with shutdown current of 3.5µA. Use Value: Extends battery life by >90% versus Schottky-based protection, with no compromise in reverse blocking capability or startup reliability. | Use Scenario: Automotive ADAS camera module subjected to 6VP-P/30kHz ripple per ISO16750-2 Section 4.6. IC Role / Device Role / Timing Role: High-frequency ripple rectifier controlling external MOSFET to suppress reverse current and minimize output capacitor RMS current. Use Value: Reduces output ripple voltage by >70% and cuts electrolytic capacitor RMS current by 3× versus passive diode, extending capacitor 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 |
|---|---|---|---|
| LTC4370CMS#PBF | Single-channel, no integrated boost regulator; requires external gate drive supply; 30mV regulation; 2.7V–36V input. | Not qualified for automotive; lacks AEC-Q100 rating and –40V reverse protection; limited to industrial/telecom. | Select LTC4370CMS#PBF only for non-automotive designs where external gate supply is acceptable and lower cost outweighs missing features. |
| TPS26631PWPR | Integrated ideal diode with 42V abs max, but fixed 45mV regulation; no boost regulator; 2.7V–42V; no ripple rectification capability. | Designed for hot-swap and surge protection, not high-frequency rectification; lacks FPU/FPD paths and 100kHz support. | Choose TPS26631PWPR for simple reverse protection where 45mV drop and absence of ripple handling are acceptable. |
Compared with LTC4370CMS#PBF and TPS26631PWPR, LT8672HMS#PBF uniquely combines AEC-Q100 H-grade qualification, integrated 11V boost regulator, 20mV regulation, and 100kHz ripple rectification-making it the only option qualified for demanding automotive under-hood ECU applications requiring both reverse protection and high-frequency input filtering.
Availability
LT8672HMS#PBF is available at Aetrix Electronics and suitable for automotive battery protection, industrial power supplies, portable instrumentation, and automotive input ripple rectification requiring stable component supply across extended temperature and high-reliability environments.
Supply support for LT8672HMS#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 automotive, industrial, communications, and healthcare markets.
The LT8672HMS#PBF belongs to Analog Devices' Power by Linear™ active rectifier controller product line, designed specifically to replace Schottky diodes in automotive and industrial power inputs with superior efficiency, thermal performance, and ripple-handling capability.
FAQ
What is the maximum reverse input voltage the LT8672HMS#PBF can withstand?
The LT8672HMS#PBF is rated for –40V reverse input voltage on its SOURCE and EN/UVLO pins, as specified in the Absolute Maximum Ratings table. This allows it to survive reverse battery connections in automotive systems without damage or latch-up, while maintaining full functionality upon recovery. The –40V rating is guaranteed across the full –40°C to 150°C operating junction temperature range for the H-grade LT8672HMS#PBF.
Does the LT8672HMS#PBF require an external gate driver or boost supply?
No, the LT8672HMS#PBF integrates a complete auxiliary boost regulator that generates a regulated 11V gate drive voltage referenced to the DRAIN pin. This eliminates the need for external gate drivers or boost supplies, simplifying design and reducing BOM count. The integrated boost regulator uses a hysteretic control scheme with 100mA current limit and automatically shuts down when AUX reaches regulation, contributing to the device's 20µA operating quiescent current.
How does the LT8672HMS#PBF achieve 100kHz ripple rectification capability?
The LT8672HMS#PBF achieves 100kHz ripple rectification through dedicated fast pull-up (FPU) and fast pull-down (FPD) comparator paths that operate independently of the main 20mV regulation loop. These paths provide sub-microsecond gate turn-on (<3.1µs) and turn-off (<1.1µs) delays, allowing the external MOSFET to switch synchronously with high-frequency input ripple up to 100kHz (at 2VP-P) without relying on the slower regulation amplifier.
What is the purpose of the PG (Power Good) pin on the LT8672HMS#PBF?
The PG pin on the LT8672HMS#PBF is an open-drain output that signals when the external MOSFET is ready to conduct load current. It pulls low if the device is in shutdown, if the AUX voltage has not reached regulation during startup, or if the fast pull-up path remains active for more than 17µs. This allows system-level monitoring of MOSFET readiness and fault conditions, enabling safe load enablement and diagnostic feedback in automotive and industrial applications.
Can the LT8672HMS#PBF be used with logic-level N-channel MOSFETs?
Yes, the LT8672HMS#PBF is fully compatible with logic-level N-channel MOSFETs. Its integrated auxiliary boost regulator delivers 11V gate drive referenced to DRAIN, providing sufficient overdrive for standard logic-level devices (e.g., VGS(th) ≤ 2.5V) across the entire 3V–42V input range. The gate driver supports ±300mA peak current and is optimized for low-Qg MOSFETs to maximize transient response and minimize power loss during high-frequency ripple rectification.
LT8672HMS#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- 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 ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
LT8672HMS#PBF FAQ
1.How can I place an order for LT8672HMS#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8672HMS#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 LT8672HMS#PBF reliable?
The price and inventory of LT8672HMS#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8672HMS#PBF is usually 5 days.
3.What payment methods are accepted for LT8672HMS#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8672HMS#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8672HMS#PBF?
LT8672HMS#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8672HMS#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 LT8672HMS#PBF?
For technical support, including LT8672HMS#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8672HMS#PBF requirements.
6.How does Aetrix verify that LT8672HMS#PBF is sourced from the original manufacturer or authorized distributors?
All LT8672HMS#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 LT8672HMS#PBF meets industry standards.
7.What is the process for return or replacement of LT8672HMS#PBF?
All LT8672HMS#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8672HMS#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 LT8672HMS#PBF part is unused and in its original packaging.
Return procedure for LT8672HMS#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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