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Analog Devices Inc. LTC4440IS6#TRMPBF
- Part No.:
- LTC4440IS6#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Gate Drivers
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LTC4440IS6#TRMPBF.pdf
- Description:
- IC GATE DRVR HIGH-SIDE SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,114
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Product details
Overview
LTC4440IS6#TRMPBF from Analog Devices (formerly Linear Technology) is a high-speed, high-voltage high-side N-channel MOSFET gate driver designed for synchronous phase-modulated full-bridge converters. It operates with TS voltages up to 80V, withstands 100V transients, delivers 2.4A peak pull-up current and 1.5Ω pull-down impedance, and achieves 10ns rise / 7ns fall times driving 1nF loads - enabling efficient switching in telecom power systems and high-density server supplies.
For engineers reviewing the LTC4440IS6#TRMPBF datasheet, LTC4440IS6#TRMPBF pinout, LTC4440IS6#TRMPBF application, or LTC4440IS6#TRMPBF equivalent, key selection criteria include its SOT-23-6 package, –40°C to 125°C operating range, bootstrapped high-side drive architecture, TTL/CMOS-compatible input with 350mV hysteresis, and dual undervoltage lockout (VCC and BOOST–TS).
Technical Context
The LTC4440IS6#TRMPBF uses an internal level shifter to translate ground-referenced TTL/CMOS inputs to the bootstrapped high-side domain, supporting operation with TS up to 100V transient. Its output stage combines an NPN bipolar pull-up (2.4A peak) and N-channel MOSFET pull-down (1.5Ω), delivering rail-to-rail swing from TS to BOOST–0.7V.
It integrates independent low-side (VCC) and high-side (BOOST–TS) undervoltage lockout circuits: VCC UVLO triggers at 6.2V (falling), BOOST–TS UVLO at 6.9V (falling). Input thresholds (VIH = 1.6V, VIL = 1.25V) are supply-independent and feature 350mV hysteresis to suppress noise-induced false triggering in high-dv/dt environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max TS Voltage | 80V continuous, 100V/100ms transient - enables use in 48V/54V telecom and 36–72V industrial DC bus systems with surge immunity. |
| Peak Pull-Up Current | 2.4A - reduces MOSFET turn-on time and conduction losses in high-gate-charge GaN or silicon devices. |
| Pull-Down Resistance | 1.5Ω - ensures fast, robust gate discharge to prevent shoot-through in bridge topologies. |
| Rise/Fall Time | 10ns/7ns @ 1nF load - minimizes switching transition losses in high-frequency (>500kHz) power stages. |
| Input Hysteresis | 350mV - provides noise margin against EMI in high-power converter PCB layouts near magnetics and switching nodes. |
| Operating Temp | –40°C to 125°C - qualified for industrial and telecom base station environments without derating. |
| VCC Range | 8V to 15V - compatible with standard 12V bias rails and supports brownout resilience via 6.2V UVLO threshold. |
Pinout & Package
The LTC4440IS6#TRMPBF is housed in a 6-lead TSOT-23 (S6) package, 1.0mm max height, with exposed pad not present - thermal path relies on leadframe conduction. Pin 1 = INP, Pin 2 = GND, Pin 3 = VCC, Pin 4 = TS, Pin 5 = TG, Pin 6 = BOOST.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INP | Ground-referenced logic input | TTL/CMOS-compatible with 1.25V/1.6V thresholds and 350mV hysteresis - accepts PWM signals directly from controllers like LTC3722-1 without level shifting. |
| GND | Low-side reference and return | Must be tied to system ground plane with minimal inductance; serves as reference for INP and VCC, and return path for quiescent currents. |
| VCC | Low-side supply input | Powers internal logic and level shifter; requires local 0.1µF ceramic bypass to GND; UVLO disables output below 6.2V. |
| TS | High-side source connection | Connects to source of driven N-MOSFET; defines lower rail for TG output swing; must withstand up to 100V transients. |
| TG | High-current gate drive output | Swings between TS and BOOST; drives MOSFET gate with 2.4A peak up / 1.5Ω down - optimized for <1nF gate loads in full-bridge topologies. |
| BOOST | Bootstrapped high-side supply | Connected via external capacitor to TS; voltage swing = VCC–VD to VIN+VCC–VD; powers high-side output stage during HS conduction. |
Key Features
| Feature | Design Value |
|---|---|
| Supply-independent input thresholds | VIH/VIL remain fixed at 1.6V/1.25V across full VCC range (8–15V), eliminating timing skew due to bias rail variation. |
| 100V transient-tolerant TS pin | Continues functional operation during 100V/100ms surges - eliminates need for external clamping in 48V telecom rectifier front-ends. |
| Dual independent UVLO | Separate monitoring of VCC and BOOST–TS ensures safe disable if either supply collapses - prevents partial drive and shoot-through risk. |
| Low-impedance pull-down | 1.5Ω RDS(on) actively sinks gate current to rapidly discharge MOSFET Ciss, critical for preventing Miller-induced turn-on in hard-switched bridges. |
| Nanosecond-scale propagation delay | tPLH/tPHL = 30/28ns (typ) - enables precise timing control in phase-modulated full-bridge controllers with tight dead-time requirements. |
Applications
| Telecom Power Rectifiers | Distributed Power Architectures |
|---|---|
Use Scenario: 48V DC input rectification in central office equipment with 100V lightning surge immunity requirement. IC Role / Device Role / Timing Role: High-side gate driver for N-channel MOSFETs in active OR-ing or hot-swap FETs, synchronized to controller PWM. Use Value: 100V TS rating and dual UVLO ensure uninterrupted operation during line surges; 2.4A pull-up enables fast turn-on of low-RDS(on) 100V MOSFETs to minimize conduction loss. | Use Scenario: Intermediate bus converter (IBC) in 12V/48V distributed power systems powering multiple point-of-load regulators. IC Role / Device Role / Timing Role: High-side driver in synchronous full-bridge topology, interfacing with LTC3722-1 controller for phase modulation. Use Value: 10ns/7ns switching times reduce transition losses at >300kHz switching frequencies; SOT-23-6 footprint saves board space in compact IBC modules. |
| Server Power Supplies | High-Density Power Modules |
Use Scenario: Primary-side high-side drive in 36–72V input, 12V/35A isolated full-bridge server PSUs meeting 80 PLUS Titanium efficiency targets. IC Role / Device Role / Timing Role: Gate driver for Si7852DP MOSFETs in full-bridge power stage, referenced to floating TS node. Use Value: 1.5Ω pull-down prevents shoot-through during dead-time; supply-independent inputs simplify interface with digital PWM controllers. | Use Scenario: Compact 1/4-brick or µModule-style DC/DC converters requiring minimal footprint and high thermal reliability. IC Role / Device Role / Timing Role: High-voltage gate driver in half-bridge or full-bridge power stage, mounted directly adjacent to power MOSFETs. Use Value: TS voltage rating up to 80V allows direct integration into 48V-input modules; –40°C to 125°C grade supports convection-cooled designs without heatsinks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4442 | Lower max TS voltage (38V), narrower VCC range (6–9.5V), no 100V transient tolerance. | Targeted for 12V/24V automotive or industrial low-voltage DC/DC; unsuitable for 48V telecom or 36–72V server inputs. | Select LTC4442 only when input voltage stays ≤38V and tighter VCC regulation is available. |
| LTC4444 | Higher peak pull-up (3A), lower pull-down resistance (0.55Ω), includes shoot-through protection, 100V TS rating. | Designed for ultra-high-efficiency bridge topologies where cross-conduction risk is critical; adds internal logic to prevent simultaneous high-side/low-side drive. | Choose LTC4444 when shoot-through prevention is mandatory and 3A drive is needed for >2nF gate loads. |
Compared with LTC4442, LTC4440IS6#TRMPBF offers 2x higher TS voltage rating and 100V surge tolerance essential for telecom infrastructure; versus LTC4444, it lacks shoot-through protection but provides identical timing performance at lower cost and complexity for well-controlled controller-based systems.
Availability
LTC4440IS6#TRMPBF is available at Aetrix Electronics and suitable for telecom power rectifiers, distributed power architectures, and server power supplies requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC4440IS6#TRMPBF 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 acquired Linear Technology in 2017 and maintains full product support, datasheets, and application engineering for legacy Linear parts including the LTC4440 family.
The LTC4440 belongs to Linear's high-voltage gate driver product line, engineered specifically for isolated full-bridge and phase-modulated converter topologies in telecom, server, and industrial power systems demanding ruggedness and nanosecond timing precision.
FAQ
What is the maximum allowable voltage on the TS pin of the LTC4440IS6#TRMPBF?
The TS pin of the LTC4440IS6#TRMPBF supports up to 80V continuously and can withstand 100V transients for 100ms without damage or functional interruption. This rating is confirmed in the Absolute Maximum Ratings table and validated in typical application schematics showing 36–72V input with 100V peak transient capability. Operation beyond 100V violates absolute maximum limits and may cause permanent failure.
Does the LTC4440IS6#TRMPBF require an external bootstrap diode?
Yes, the LTC4440IS6#TRMPBF requires an external bootstrap diode connected between VCC and BOOST to charge the bootstrap capacitor during low-side conduction. The datasheet specifies this configuration in the PIN FUNCTIONS section and typical application diagrams (e.g., TA03 and TA05), where a diode (e.g., MMBZ5226B or equivalent) is used to isolate the BOOST capacitor from VCC during high-side conduction.
What is the purpose of the 350mV input hysteresis in the LTC4440IS6#TRMPBF?
The 350mV hysteresis between VIH (1.6V) and VIL (1.25V) in the LTC4440IS6#TRMPBF prevents false triggering caused by noise or slow input edges in high-dv/dt power converter environments. This design value is measured and specified in the Electrical Characteristics table and ensures reliable logic-level interpretation even when INP traces run near switching nodes or transformers.
Can the LTC4440IS6#TRMPBF drive a MOSFET with 2nF total gate capacitance?
The LTC4440IS6#TRMPBF is characterized for 1nF loads (10ns rise / 7ns fall), and while it can drive 2nF, timing degrades: rise/fall times scale approximately linearly with capacitance, resulting in ~20ns/14ns. The 2.4A peak pull-up and 1.5Ω pull-down remain effective, but designers should verify switching losses and dead-time margins in actual layout. No datasheet data supports guaranteed performance beyond 1nF.
How does the undervoltage lockout function in the LTC4440IS6#TRMPBF?
The LTC4440IS6#TRMPBF implements two independent UVLO circuits: VCC UVLO trips at 6.2V (falling) to disable the input buffer, and BOOST–TS UVLO trips at 6.9V (falling) to force TG low. When both supplies drop below threshold, the device enters low-current mode (25µA VCC / 86µA BOOST draw). These thresholds and hysteresis values are fully specified in the Electrical Characteristics table and verified across temperature.
LTC4440IS6#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Driven Configuration:
- High-Side
- Channel Type:
- Single
- Number of Drivers:
- 1
- Gate Type:
- N-Channel MOSFET
- Voltage - Supply:
- 8V ~ 15V
- Logic Voltage - VIL, VIH:
- 1.3V, 1.6V
- Current - Peak Output (Source, Sink):
- 2.4A, 2.4A
- Input Type:
- Non-Inverting
- High Side Voltage - Max (Bootstrap):
- 80 V
- Rise / Fall Time (Typ):
- 10ns, 7ns
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
LTC4440IS6#TRMPBF FAQ
1.How can I place an order for LTC4440IS6#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4440IS6#TRMPBF 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 LTC4440IS6#TRMPBF reliable?
The price and inventory of LTC4440IS6#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4440IS6#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC4440IS6#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4440IS6#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4440IS6#TRMPBF?
LTC4440IS6#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4440IS6#TRMPBF 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 LTC4440IS6#TRMPBF?
For technical support, including LTC4440IS6#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4440IS6#TRMPBF requirements.
6.How does Aetrix verify that LTC4440IS6#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC4440IS6#TRMPBF 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 LTC4440IS6#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC4440IS6#TRMPBF?
All LTC4440IS6#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4440IS6#TRMPBF, 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 LTC4440IS6#TRMPBF part is unused and in its original packaging.
Return procedure for LTC4440IS6#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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