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Analog Devices Inc. LTC4442EMS8E#PBF
- Part No.:
- LTC4442EMS8E#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Gate Drivers
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC4442EMS8E#PBF.pdf
- Description:
- IC GATE DRVR HALF-BRIDGE 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:8,332
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Product details
Overview
LTC4442EMS8E#PBF from Analog Devices (formerly Linear Technology) is a high-speed dual N-channel MOSFET gate driver IC designed for synchronous buck DC/DC converters. It delivers 2.4A peak pull-up and 5A peak pull-down current, supports up to 42V bootstrapped supply, features adaptive shoot-through protection, and operates with 6V–9.5V VCC and 3V–9.5V VLOGIC supplies - enabling efficient control of high-side and low-side power MOSFETs in high-density power modules.
For engineers reviewing the LTC4442EMS8E#PBF datasheet, LTC4442EMS8E#PBF pinout, LTC4442EMS8E#PBF application, or LTC4442EMS8E#PBF equivalent, key selection considerations include its 8ns TG fall time driving 3nF, undervoltage lockout thresholds (2.60V/2.75V on VCC), thermally enhanced MSOP-8 package with exposed pad, and compatibility with PWM controllers using 3.3V or 5V logic levels.
Technical Context
The LTC4442EMS8E#PBF implements a three-state input stage with VLOGIC-referenced thresholds (VIH(TG) = 3.5V typ at VLOGIC = 5V; VIL(BG) = 1.21V typ), enabling seamless interfacing with diverse PWM controllers. Its internal level shifter translates logic-level IN signals to the bootstrapped high-side domain (BOOST–TS), supporting up to 42V above ground.
Adaptive shoot-through protection actively monitors external MOSFET voltage states to prevent simultaneous conduction, while separate VLOGIC and VCC supplies allow independent optimization of logic interface integrity and driver output strength. Undervoltage lockout circuits independently monitor both supplies (VCC UVLO: 2.60V–3.65V; VLOGIC UVLO: 2.4V–3.0V) and force both outputs low during fault conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 6V to 9.5V - powers low-side driver directly and high-side via bootstrap diode; ensures stable operation across industrial input rails. |
| Peak Pull-Down Current (BG) | 5A - enables rapid turn-off of low-side MOSFETs, minimizing cross-conduction loss in high-frequency buck stages. |
| TG Fall Time | 8ns @ 3nF load - reduces switching transition time, directly lowering MOSFET conduction losses in high-efficiency designs. |
| VLOGIC Range | 3V to 9.5V - allows direct connection to 3.3V or 5V controller logic supplies without level-shifting circuitry. |
| BOOST–TS Max Voltage | 42V - supports high-input-voltage synchronous buck topologies up to 38V VIN with margin for transients. |
| UVLO Hysteresis (VCC) | 160mV - prevents oscillatory behavior during supply ramp-up/down by ensuring clean enable/disable transitions. |
| Operating Temp Range | –40°C to 85°C - qualified for industrial ambient environments without derating in standard PCB layouts. |
Pinout & Package
The LTC4442EMS8E#PBF is housed in an 8-lead MSOP package (MS8E) with exposed thermal pad (Pin 9, GND), requiring soldering to PCB ground for rated thermal performance (θJA = 40°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TG (Pin 1) | High-side gate driver output | Swings between TS and BOOST; drives top N-MOSFET gate with 2.4A pull-up / 2.4A pull-down capability. |
| TS (Pin 2) | High-side MOSFET source node | Reference point for TG output and BOOST capacitor; must be routed with low inductance to minimize ringing. |
| BG (Pin 3) | Low-side gate driver output | Swings between GND and VCC; delivers 5A peak pull-down for fast low-side turn-off and shoot-through immunity. |
| GND (Pin 4 + Exposed Pad Pin 9) | Chip ground and thermal path | Common reference for all supplies and logic; exposed pad must be soldered to PCB ground plane for thermal and electrical integrity. |
| IN (Pin 5) | Digital input signal | Three-state logic input referenced to VLOGIC; floating state triggers shutdown mode pulling both BG and TG low. |
| VLOGIC (Pin 6) | Input buffer supply | Powers logic interface; sets input thresholds proportional to its voltage (e.g., VIH(TG) ≈ 0.7×VLOGIC), enabling controller voltage matching. |
| VCC (Pin 7) | Driver output supply | Powers low-side driver directly and charges BOOST capacitor via external diode; bypass capacitor required between VCC and GND. |
| BOOST (Pin 8) | High-side bootstrap supply | Connected to TS via external capacitor; voltage swings from VCC–VD to VIN+VCC–VD, enabling high-side N-MOSFET drive. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive shoot-through protection | Monitors external MOSFET voltages in real time to prevent simultaneous conduction - eliminates need for fixed dead-time programming or external timing components. |
| VLOGIC-referenced input thresholds | VIH/VIL scale with VLOGIC supply (e.g., VIH(TG) = 3.5V at VLOGIC = 5V); ensures noise-immune interface with 3.3V or 5V PWM controllers without external level shifters. |
| Thermally enhanced MSOP-8 with exposed pad | θJA = 40°C/W when soldered to 2500 mm² double-sided 1 oz copper ground plane - enables >3W dissipation in compact industrial power modules. |
| Independent VCC and VLOGIC supplies | Allows VLOGIC to match controller logic voltage (3.3V/5V) while VCC is optimized for driver strength (6V–9.5V), decoupling logic integrity from power rail constraints. |
| Shutdown mode on floating IN | Internal resistive divider pulls IN into inactive region if controller output goes high-Z - ensures fail-safe MOSFET turn-off during controller reset or fault conditions. |
Applications
| Server VRM Power Stage | Industrial DC/DC Module |
|---|---|
Use Scenario: Driving parallel N-channel MOSFETs in a 12V-to-1.2V, 30A multiphase buck converter for CPU core power delivery. IC Role / Device Role / Timing Role: Dual gate driver providing synchronized high-side/low-side control with adaptive dead-time management and fast 8ns/12ns edge rates. Use Value: Enables >95% efficiency at 500kHz switching frequency by minimizing MOSFET transition losses and eliminating cross-conduction current. | Use Scenario: Compact 24V-to-5V/12V isolated/non-isolated power module for PLC I/O cards operating in –40°C to 85°C ambient. IC Role / Device Role / Timing Role: High-voltage-capable gate driver supporting 38V max input with robust UVLO and thermal shutdown for field-deployed reliability. Use Value: Delivers stable gate drive under wide input transients and temperature extremes, reducing need for external supervision circuitry. |
| Telecom Intermediate Bus Converter | Automotive ADAS Power Supply |
Use Scenario: 48V-to-12V synchronous buck stage in distributed telecom power architecture feeding multiple downstream POL converters. IC Role / Device Role / Timing Role: High-speed driver enabling 1MHz+ operation with minimal propagation delay skew (tPLH/tPHL ≤ 20ns) for tight voltage regulation. Use Value: Reduces output filter size by 40% versus 300kHz designs while maintaining <±1% load regulation via precise edge timing. | Use Scenario: 12V-to-3.3V/5V power supply for radar sensor ECU with ASIL-B functional safety requirements. IC Role / Device Role / Timing Role: Fail-safe gate driver with dual independent UVLO monitoring (VCC and VLOGIC) and overtemperature shutdown (160°C trip). Use Value: Meets ISO 26262 diagnostic coverage targets for power stage supervision without adding external watchdog ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4449 | Lower VCC range (4.5V–6.5V), higher peak pull-down (4.5A), same MSOP-8 package | Optimized for lower-voltage, higher-current applications (e.g., 5V input POLs); lacks VLOGIC supply independence | Select LTC4449 when VCC is constrained to ≤6.5V and maximum low-side drive strength is critical; not suitable for 8V+ VCC systems. |
| LTC4444-5 | Higher BOOST–TS rating (100V), wider VCC range (4.5V–13.5V), integrated bootstrap diode driver | Targeted at 48V/60V industrial and automotive high-voltage buck converters; requires external high-voltage bootstrap components | Choose LTC4444-5 for >42V input applications; LTC4442EMS8E#PBF remains optimal for ≤38V VIN with simpler layout and lower cost. |
Compared with LTC4449 and LTC4444-5, the LTC4442EMS8E#PBF offers the best balance of 42V boost capability, VLOGIC/VCC supply separation, and thermal performance in MSOP-8 - making it ideal for industrial and telecom 24V–48V intermediate bus converters where layout simplicity and logic compatibility are prioritized.
Availability
LTC4442EMS8E#PBF is available at Aetrix Electronics and suitable for server VRM power stages, industrial DC/DC modules, telecom intermediate bus converters, and automotive ADAS power supplies requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LTC4442EMS8E#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC4442EMS8E#PBF belongs to Linear's high-speed power MOSFET driver product line, engineered specifically for synchronous buck DC/DC converters demanding fast switching, shoot-through immunity, and robust operation across wide input voltage and temperature ranges.
FAQ
What is the maximum allowable BOOST–TS voltage for the LTC4442EMS8E#PBF?
The absolute maximum BOOST–TS voltage for the LTC4442EMS8E#PBF is 42V, as specified in the Absolute Maximum Ratings table. This enables reliable operation in synchronous buck converters with up to 38V input voltage, accounting for transient margins and bootstrap diode forward drop. Exceeding 42V risks permanent damage to the high-side driver stage.
Does the LTC4442EMS8E#PBF support 3.3V logic inputs?
Yes, the LTC4442EMS8E#PBF fully supports 3.3V logic inputs via its VLOGIC pin (Pin 6). When VLOGIC = 3.3V, input thresholds scale accordingly: VIH(TG) = 2.2V (typ), VIL(TG) = 2.09V (typ), VIH(BG) = 1.10V (typ), and VIL(BG) = 1.21V (typ). This ensures noise-immune interfacing with standard 3.3V PWM controllers without external level shifting.
How does the adaptive shoot-through protection in the LTC4442EMS8E#PBF work?
The LTC4442EMS8E#PBF implements adaptive shoot-through protection by continuously monitoring the voltage states of the external high-side and low-side MOSFETs. It prevents the bottom MOSFET from turning on until the top MOSFET's gate-source voltage falls below threshold, and vice versa - dynamically adjusting dead time based on actual device behavior rather than fixed delays. This eliminates cross-conduction current without compromising switching speed.
What is the purpose of the exposed thermal pad (Pin 9) on the LTC4442EMS8E#PBF?
The exposed thermal pad (Pin 9) on the LTC4442EMS8E#PBF serves as both the primary electrical ground connection and the main thermal dissipation path. It must be soldered to a PCB ground plane with ≥2500 mm² copper area to achieve the specified θJA of 40°C/W. Failure to properly solder this pad results in significantly degraded thermal performance and potential junction overheating under sustained load.
Can the LTC4442EMS8E#PBF operate with VLOGIC tied to VCC?
Yes, the LTC4442EMS8E#PBF allows VLOGIC (Pin 6) to be tied directly to VCC (Pin 7) to simplify PCB routing. In this configuration, input thresholds remain valid (e.g., VIH(TG) ≈ 3.5V at VCC = 7V), and the internal regulator limits thresholds for VLOGIC > 5V. However, separating VLOGIC from VCC is recommended when interfacing with 3.3V controllers to maintain optimal noise margin and threshold alignment.
LTC4442EMS8E#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Driven Configuration:
- Half-Bridge
- Channel Type:
- Synchronous
- Number of Drivers:
- 2
- Gate Type:
- N-Channel MOSFET
- Voltage - Supply:
- 6V ~ 9.5V
- Logic Voltage - VIL, VIH:
- -
- Current - Peak Output (Source, Sink):
- 2.4A, 2.4A
- Input Type:
- Non-Inverting
- High Side Voltage - Max (Bootstrap):
- 42 V
- Rise / Fall Time (Typ):
- 12ns, 8ns
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP-EP
LTC4442EMS8E#PBF FAQ
1.How can I place an order for LTC4442EMS8E#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4442EMS8E#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 LTC4442EMS8E#PBF reliable?
The price and inventory of LTC4442EMS8E#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4442EMS8E#PBF is usually 5 days.
3.What payment methods are accepted for LTC4442EMS8E#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4442EMS8E#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4442EMS8E#PBF?
LTC4442EMS8E#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4442EMS8E#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 LTC4442EMS8E#PBF?
For technical support, including LTC4442EMS8E#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4442EMS8E#PBF requirements.
6.How does Aetrix verify that LTC4442EMS8E#PBF is sourced from the original manufacturer or authorized distributors?
All LTC4442EMS8E#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 LTC4442EMS8E#PBF meets industry standards.
7.What is the process for return or replacement of LTC4442EMS8E#PBF?
All LTC4442EMS8E#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4442EMS8E#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 LTC4442EMS8E#PBF part is unused and in its original packaging.
Return procedure for LTC4442EMS8E#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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