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Analog Devices Inc. LTC4440ES6-5#TRMPBF
- Part No.:
- LTC4440ES6-5#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Gate Drivers
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LTC4440ES6-5#TRMPBF.pdf
- Description:
- IC GATE DRVR HIGH-SIDE TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,826
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Product details
Overview
LTC4440ES6-5#TRMPBF from Analog Devices (formerly Linear Technology) is a high-speed, high-voltage high-side N-channel MOSFET gate driver in a 6-lead TSOT-23 package, designed for synchronous full-bridge and phase-modulated converters. It operates with VCC from 4V to 15V, withstands 80V VIN transients, delivers 1.1A peak pull-up current and 1.85Ω pull-down resistance, and drives 1nF loads with 10ns rise/7ns fall times - enabling efficient switching in telecom and server power supplies.
For engineers reviewing the LTC4440ES6-5#TRMPBF datasheet, LTC4440ES6-5#TRMPBF pinout, LTC4440ES6-5#TRMPBF application, or LTC4440ES6-5#TRMPBF equivalent, key selection criteria include bootstrapped high-side drive capability up to 95V above TS, supply-independent TTL/CMOS input thresholds with 350mV hysteresis, undervoltage lockout (3.04V falling), and thermal performance in the low-profile SOT-23 package.
Technical Context
The LTC4440ES6-5#TRMPBF uses an internal level shifter to translate ground-referenced INP signals to the bootstrapped high-side domain (BOOST–TS), supporting operation with TS floating up to 80V above GND. Its output stage combines an NPN pull-up transistor (1.1A peak) and an NMOS pull-down device (1.85Ω typical RDS) to achieve fast, low-impedance switching critical for minimizing MOSFET transition losses.
It features a dedicated undervoltage lockout circuit that disables TG when VCC falls below 3.04V, ensuring safe turn-off during brownout conditions. Input thresholds (VIH = 1.6V, VIL = 1.25V typ) are regulated internally and independent of VCC, with 350mV hysteresis to reject noise in high-dv/dt environments common in isolated DC/DC converters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4V to 15V - powers low-side logic and level shifter; enables compatibility with standard 5V/12V control rails. |
| BOOST–TS Max (100ms) | 95V - defines maximum bootstrapped supply swing, allowing high-side drive in 60V-input systems with 80V transients. |
| Peak Pull-Up Current | 1.1A - ensures rapid charging of high-Ciss MOSFET gates, reducing turn-on time and conduction loss. |
| Pull-Down Resistance | 1.85Ω - provides strong sink capability to rapidly discharge gate capacitance and prevent shoot-through in bridge topologies. |
| Rise/Fall Time (1nF) | 10ns / 7ns - measured at VBOOST–TS = 6V; enables >10MHz effective switching in hard-switched applications. |
| Input Hysteresis | 350mV - suppresses false triggering from EMI or ringing on INP in noisy power-converter environments. |
| UVLO Threshold (falling) | 3.04V - guarantees clean, predictable disablement of TG output before VCC drops below reliable logic operation. |
Pinout & Package
Package: 6-lead TSOT-23 (S6), 1.0mm max height, exposed pad not present - optimized for space-constrained, high-density power modules.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 1) | Low-side supply input | Powers internal logic and level shifter; requires local 0.1µF ceramic bypass to GND for stable high-frequency operation. |
| GND (Pin 2) | Reference ground | Return path for VCC and input buffer; must be connected to clean system ground plane to minimize noise coupling. |
| INP (Pin 3) | Digital input signal | TTL/CMOS-compatible, ground-referenced control input with 350mV hysteresis; high-impedance (>1MΩ) minimizes drive burden. |
| TS (Pin 4) | High-side source reference | Connects to MOSFET source terminal; floats with high-side rail; sets lower voltage rail for TG output swing. |
| TG (Pin 5) | Gate driver output | Swings between TS and BOOST; drives MOSFET gate directly; capable of sourcing 1.1A and sinking >100mA. |
| BOOST (Pin 6) | Bootstrapped high-side supply | Connected via external capacitor to TS; supplies gate drive voltage referenced to TS; supports up to 95V swing. |
Key Features
| Feature | Design Value |
|---|---|
| Supply-independent input thresholds | VIH = 1.6V / VIL = 1.25V (typ) with 350mV hysteresis - eliminates need for level-shifting circuitry and improves noise immunity across VCC variation. |
| High transient tolerance | Withstands 80V, 100ms transients on VIN (via TS node) - enables robust operation in automotive or industrial 48V bus systems with load dump. |
| Fast, low-impedance output stage | 10ns rise / 7ns fall into 1nF at 6V BOOST–TS - reduces MOSFET switching losses by minimizing time spent in linear region. |
| Integrated undervoltage lockout | Disables TG when VCC falls below 3.04V - prevents partial turn-on and shoot-through during power-up/down or brownout events. |
| Thermally optimized SOT-23 | θJA = 230°C/W - suitable for moderate-power applications (<2W dissipation) where board area is constrained and forced air cooling is unavailable. |
Applications
| Telecom Power Supplies | Server VRMs |
|---|---|
|
Use Scenario: Driving high-side MOSFETs in isolated full-bridge DC/DC converters for 48V intermediate bus conversion to 12V/35A. IC Role / Device Role / Timing Role: High-side gate driver synchronizing with controller (e.g., LTC3722-1) to enable zero-voltage switching and reduce EMI. Use Value: 1.1A peak drive and 1.85Ω pull-down ensure fast, controlled turn-off of 1000pF+ MOSFET gates, minimizing conduction loss and improving efficiency at 200–500kHz. |
Use Scenario: Controlling high-side FETs in multiphase buck-derived VRMs powering modern CPUs and ASICs. IC Role / Device Role / Timing Role: High-speed gate driver translating PWM signals from digital controllers to high-side N-channel switches in compact, thermally dense layouts. Use Value: 10ns/7ns switching into 1nF load enables precise timing alignment across phases, reducing current imbalance and improving transient response. |
| Distributed Power Architectures | Industrial 24/48V DC Systems |
|
Use Scenario: Driving half-bridge legs in point-of-load (POL) converters distributed across PCBs in data center racks. IC Role / Device Role / Timing Role: Compact, high-voltage-capable gate driver enabling high-efficiency, low-profile POL modules with minimal external components. Use Value: TS-referenced architecture allows direct integration with floating high-side switches without optocouplers or transformers, reducing BOM count and layout complexity. |
Use Scenario: Controlling high-side switches in industrial motor drives, PLC power stages, or battery-powered equipment operating from 24V/48V nominal inputs. IC Role / Device Role / Timing Role: Rugged gate driver handling 80V transients during inductive load switching while maintaining reliable logic-level interface. Use Value: 80V transient tolerance and 350mV input hysteresis ensure reliable operation in electrically noisy factory environments with frequent load dumps or relay bounce. |
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 |
|---|---|---|---|
| LM5109BMAX/NOPB | Higher VBS rating (100V continuous), but slower rise/fall (25ns/20ns @ 1nF); no integrated UVLO hysteresis. | Preferred in higher-voltage (>75V) industrial systems where absolute transient margin outweighs speed requirements. | Select LM5109BMAX/NOPB when continuous BOOST–TS voltage exceeds 85V or when dual-output (high/low side) integration is needed. |
| UCC27531DBVR | Lower VDD range (4.5–18V), faster switching (6.5ns/5ns), but only rated for 65V max VBS; no TS-referenced architecture. | Suitable for non-isolated, ground-referenced high-side drivers or bootstrap circuits with <60V input. | Choose UCC27531DBVR for cost-sensitive, high-frequency designs where 65V transient tolerance is sufficient and layout allows separate ground domains. |
Compared with LM5109BMAX/NOPB and UCC27531DBVR, the LTC4440ES6-5#TRMPBF uniquely balances 80V transient resilience, sub-10ns fall time, and true TS-referenced operation in a 6-pin SOT-23 - making it optimal for compact, isolated full-bridge and phase-modulated converters where gate drive fidelity and fault robustness are co-prioritized.
Availability
LTC4440ES6-5#TRMPBF is available at Aetrix Electronics and suitable for telecom power supplies, server VRMs, and industrial 24/48V DC systems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for LTC4440ES6-5#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 its legacy of precision analog and power management ICs, emphasizing reliability, high-voltage robustness, and application-specific integration.
The LTC4440ES6-5#TRMPBF belongs to Linear's high-speed gate driver product line, engineered specifically for isolated DC/DC converter topologies requiring fast, fault-tolerant high-side drive in space-constrained, high-efficiency power systems.
FAQ
What is the maximum allowable voltage on the TS pin of the LTC4440ES6-5#TRMPBF?
The TS pin of the LTC4440ES6-5#TRMPBF supports up to 80V for 100ms transients and 70V continuously. This rating enables use in 60V-input systems subject to load-dump or inductive kick events. Exceeding these limits risks permanent damage. The device's internal architecture references all high-side functions to TS, so proper PCB layout and transient suppression on the TS net are essential for reliable operation of the LTC4440ES6-5#TRMPBF.
Can the LTC4440ES6-5#TRMPBF drive logic-level MOSFETs?
Yes, the LTC4440ES6-5#TRMPBF is explicitly optimized for driving (5V) logic-level N-channel MOSFETs. Its 4V to 15V gate drive range (BOOST–TS), combined with a 0.7V typical VOH drop (VBOOST–TS – 0.7V), ensures sufficient VGS overdrive even at lower supply voltages. The 1.1A peak pull-up and 1.85Ω pull-down guarantee fast switching of devices with gate charges up to ~30nC - a key requirement for efficient operation of logic-level FETs in the LTC4440ES6-5#TRMPBF's target applications.
Does the LTC4440ES6-5#TRMPBF require an external bootstrap diode?
Yes, the LTC4440ES6-5#TRMPBF requires an external bootstrap diode connected between VCC and BOOST to charge the bootstrap capacitor during the low-side conduction phase. A Schottky diode (e.g., MBR0520L) is recommended for low forward voltage and fast recovery. Without this diode, the BOOST capacitor cannot recharge, causing VBOOST–TS to collapse and resulting in incomplete high-side gate drive - a failure mode confirmed in the LTC4440ES6-5#TRMPBF's application circuits and timing diagrams.
What is the purpose of the 350mV input hysteresis in the LTC4440ES6-5#TRMPBF?
The 350mV hysteresis between VIH (1.6V) and VIL (1.25V) in the LTC4440ES6-5#TRMPBF prevents false triggering caused by noise or slow-rising input edges in high-dv/dt power converter environments. This design feature ensures clean, deterministic transitions even when INP is routed near switching nodes or high-current paths - directly improving system reliability in full-bridge and phase-modulated converters using the LTC4440ES6-5#TRMPBF.
How does the undervoltage lockout (UVLO) function in the LTC4440ES6-5#TRMPBF?
The LTC4440ES6-5#TRMPBF's UVLO circuit monitors VCC and disables the TG output (pulling it low to TS) when VCC falls below 3.04V (falling threshold). This prevents partial turn-on of the driven MOSFET, which could cause excessive heating or shoot-through in bridge configurations. The 160mV hysteresis (3.20V rising threshold) avoids oscillation near the trip point. This behavior is fully characterized and guaranteed across temperature, ensuring safe operation during power sequencing in systems using the LTC4440ES6-5#TRMPBF.
LTC4440ES6-5#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:
- 4V ~ 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
LTC4440ES6-5#TRMPBF FAQ
1.How can I place an order for LTC4440ES6-5#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4440ES6-5#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 LTC4440ES6-5#TRMPBF reliable?
The price and inventory of LTC4440ES6-5#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4440ES6-5#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC4440ES6-5#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4440ES6-5#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4440ES6-5#TRMPBF?
LTC4440ES6-5#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4440ES6-5#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 LTC4440ES6-5#TRMPBF?
For technical support, including LTC4440ES6-5#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4440ES6-5#TRMPBF requirements.
6.How does Aetrix verify that LTC4440ES6-5#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC4440ES6-5#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 LTC4440ES6-5#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC4440ES6-5#TRMPBF?
All LTC4440ES6-5#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4440ES6-5#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 LTC4440ES6-5#TRMPBF part is unused and in its original packaging.
Return procedure for LTC4440ES6-5#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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