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Analog Devices Inc. LTC4440ES6#TRPBF
- Part No.:
- LTC4440ES6#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Gate Drivers
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LTC4440ES6#TRPBF.pdf
- Description:
- IC GATE DRVR HIGH-SIDE TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:19,700
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Product details
Overview
LTC4440ES6#TRPBF 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 VIN 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 and server power supplies.
For engineers reviewing the LTC4440ES6#TRPBF datasheet, LTC4440ES6#TRPBF pinout, LTC4440ES6#TRPBF application, or LTC4440ES6#TRPBF equivalent, key selection criteria include its SOT-23-6 package, TS-referenced output stage, bootstrap supply tolerance (up to 115V above ground), TTL/CMOS input with 350mV hysteresis, and dual undervoltage lockout (VCC and BOOST–TS).
Technical Context
The LTC4440ES6#TRPBF uses an internal level shifter to translate ground-referenced TTL/CMOS inputs to the bootstrapped high-side domain, supporting operation with TS floating up to 100V above GND. Its output stage combines an NPN bipolar pull-up (2.4A peak) and N-channel MOSFET pull-down (1.5Ω typical), delivering rail-to-rail swing from TS to BOOST–0.7V.
It integrates independent low-side (VCC) and high-side (BOOST–TS) UVLO circuits - disabling the driver when VCC falls below 6.2V or BOOST–TS drops below 6.9V - ensuring safe MOSFET gate control during supply brownouts. The device is specified for –40°C to +85°C operation and features <250µA VCC quiescent current at 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max VIN (Continuous) | 80V - supports wide-input telecom and industrial DC bus voltages without external clamping. |
| Absolute Max VIN (Transient) | 100V/100ms - survives line surges in distributed power architectures without latch-up or damage. |
| Peak Pull-Up Current | 2.4A - rapidly charges high-Ciss MOSFET gates, minimizing conduction losses in high-power bridges. |
| Pull-Down Resistance | 1.5Ω - ensures fast, robust gate discharge to prevent shoot-through in synchronous rectification. |
| Rise/Fall Time (1nF) | 10ns/7ns - enables >10MHz switching frequencies while maintaining low transition losses. |
| Input Hysteresis | 350mV - rejects noise on INP in high-dv/dt environments like isolated full-bridge gate drive. |
| VCC UVLO Threshold | 6.2V (falling) - prevents erratic output behavior during startup or brownout conditions. |
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 |
|---|---|---|
| 1 (INP) | Ground-referenced logic input | TTL/CMOS compatible with 1.25V/1.6V thresholds and 350mV hysteresis - accepts standard controller outputs without level-shifting. |
| 2, 4 (GND) | Low-side reference and return path | Dual GND pins reduce ground bounce during 2.4A transient currents; must be tied together at PCB. |
| 3 (VCC) | Low-side supply (8V–15V) | Powers internal logic and level shifter; bypass capacitor required between Pin 3 and Pin 2 for stability. |
| 5 (TG) | High-side gate driver output | Swings between TS and BOOST–0.7V; drives MOSFET gate directly - no external components needed. |
| 6 (TS) | High-side source reference | Connects to MOSFET source; floats up to 100V above GND - defines local ground for TG output swing. |
| NC (Pin 5 in MSOP variant) | No connect | Not present in SOT-23 package - Pin 5 is TG; no NC pin in LTC4440ES6#TRPBF. |
Key Features
| Feature | Design Value |
|---|---|
| Supply-independent input thresholds | VIH = 1.6V, VIL = 1.25V (±0.1V) - eliminates need for VCC tracking in input buffer design. |
| Bootstrap supply voltage range | BOOST–TS = 4V to 15V - supports flexible gate overdrive for standard- and logic-level MOSFETs. |
| High-side UVLO | 6.9V rising threshold (BOOST–TS) - prevents MOSFET turn-on when bootstrap capacitor is undercharged. |
| Thermal performance | θJA = 230°C/W (SOT-23) - requires careful thermal layout but enables compact placement near power stage. |
| Propagation delay matching | tPLH = tPHL = 30ns typ - minimizes dead-time uncertainty in synchronous bridge timing control. |
Applications
| Telecom Power Supply | Distributed Power Architecture |
|---|---|
Use Scenario: 36V–72V input isolated full-bridge converter delivering 12V/35A for base station RF amplifiers. IC Role / Device Role / Timing Role: High-side gate driver for Si7852DP N-channel MOSFETs in primary-side synchronous rectification. Use Value: 10ns rise time ensures minimal overlap conduction loss during 500kHz switching, improving efficiency by ≥0.8% vs. slower drivers. |
Use Scenario: Intermediate bus converter (48V→12V) feeding multiple point-of-load regulators in modular server racks. IC Role / Device Role / Timing Role: High-side driver controlling top-switch MOSFETs in phase-modulated full-bridge topology with LTC3722-1 controller. Use Value: 100V transient tolerance eliminates need for external TVS on VIN, reducing BOM count and board area. |
| Server Power Module | Industrial DC-DC Converter |
Use Scenario: 1/4-brick 240W isolated supply (42V–56V input → 12V/20A) for AI accelerator cards. IC Role / Device Role / Timing Role: Gate driver for Si7370DP high-current MOSFETs in secondary-side synchronous rectification. Use Value: Dual UVLO (VCC + BOOST–TS) prevents partial gate drive during startup, eliminating shoot-through risk during soft-start. |
Use Scenario: 80V-rated industrial motor drive auxiliary supply using half-bridge topology with discrete MOSFETs. IC Role / Device Role / Timing Role: High-side driver for N-channel MOSFETs operating with TS referenced to floating DC link midpoint. Use Value: Level-shifted input allows direct interface to microcontroller GPIOs without optocouplers or isolated level shifters. |
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 |
|---|---|---|---|
| LTC4440IMS8E#TRPBF | 8-lead MSOP package with exposed thermal pad; θJA = 40°C/W vs. 230°C/W; identical electrical specs. | Required for higher-power or thermally constrained designs where SOT-23 self-heating exceeds limits. | Select when continuous output current >1.5A or ambient temperature >70°C; otherwise LTC4440ES6#TRPBF offers lower cost and smaller footprint. |
| LTC4444ES6#TRPBF | Includes shoot-through protection; 3A peak pull-up; 0.55Ω pull-down; wider VCC range (4.5V–13.5V). | Suitable for half-bridge or complementary switch configurations where cross-conduction risk exists. | Choose only if shoot-through prevention is mandatory; LTC4440ES6#TRPBF lacks this feature but offers lower propagation delay (30ns vs. 45ns). |
Compared with LTC4440IMS8E#TRPBF, the LTC4440ES6#TRPBF trades thermal performance for size and cost - ideal for space-limited, medium-duty applications. Versus LTC4444ES6#TRPBF, it provides faster timing and simpler biasing but requires external dead-time control in bridge topologies.
Availability
LTC4440ES6#TRPBF is available at Aetrix Electronics and suitable for telecom power supplies, distributed power architectures, and server power modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LTC4440ES6#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 acquired Linear Technology in 2017; Linear pioneered precision analog ICs for power management, signal conditioning, and timing - now part of ADI's broad portfolio.
The LTC4440ES6#TRPBF belongs to Linear's high-voltage gate driver product line, engineered specifically for isolated DC-DC converters in telecom, computing, and industrial systems demanding ruggedness, speed, and bootstrap reliability.
FAQ
What is the maximum allowable voltage on the TS pin of the LTC4440ES6#TRPBF?
The TS pin of the LTC4440ES6#TRPBF supports continuous operation up to 80V above GND and can withstand 100V transients for up to 100ms without damage or functional interruption. This rating enables use in high-voltage DC bus applications such as 48V and 54V telecom systems where transient immunity is critical. The absolute maximum rating is strictly limited to 100V for short durations - sustained operation above 80V violates the continuous specification.
Does the LTC4440ES6#TRPBF require an external bootstrap diode?
Yes, the LTC4440ES6#TRPBF requires an external bootstrap diode connected between VCC (Pin 3) and BOOST (Pin 6). This diode charges the external bootstrap capacitor during the low-side switch conduction period, maintaining the BOOST–TS voltage needed to drive the high-side MOSFET gate above TS. A fast-recovery or Schottky diode with ≤0.5V forward drop and ≥100mA average current rating is recommended to minimize voltage loss and ensure reliable bootstrapping.
Can the LTC4440ES6#TRPBF drive logic-level MOSFETs?
Yes, the LTC4440ES6#TRPBF can drive logic-level MOSFETs because its BOOST–TS supply range is 4V to 15V, and its TG output swings within 0.7V of BOOST. When configured with BOOST–TS = 5V, the driver delivers ~4.3V gate drive - sufficient to fully enhance most logic-level devices (VGS(th) ≤ 2.5V). However, gate charge requirements must still be met: the 2.4A peak pull-up ensures rapid turn-on even for QG > 50nC devices.
What is the purpose of the dual undervoltage lockout in the LTC4440ES6#TRPBF?
The LTC4440ES6#TRPBF implements two independent UVLO circuits: one monitors VCC (threshold 6.2V falling), the other monitors BOOST–TS (threshold 6.9V falling). Both must remain above their thresholds for normal operation. If either supply drops below its threshold, the TG output is actively pulled to TS, forcing the driven MOSFET into a safe-off state. This prevents partial or weak gate drive that could cause linear-mode operation and catastrophic failure during brownout or bootstrap capacitor discharge.
How does the input hysteresis of the LTC4440ES6#TRPBF improve noise immunity?
The LTC4440ES6#TRPBF features 350mV of input hysteresis (VIH – VIL = 0.35V), meaning the rising threshold is 1.6V and the falling threshold is 1.25V. This prevents oscillation or false triggering when the INP signal crosses the threshold in noisy environments - common in high-frequency, high-voltage power stages. The hysteresis window ensures clean, monotonic transitions even with up to ±175mV of superimposed noise on the input signal, eliminating the need for external RC filtering in most layouts.
LTC4440ES6#TRPBF 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
LTC4440ES6#TRPBF FAQ
1.How can I place an order for LTC4440ES6#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4440ES6#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 LTC4440ES6#TRPBF reliable?
The price and inventory of LTC4440ES6#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4440ES6#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC4440ES6#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4440ES6#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4440ES6#TRPBF?
LTC4440ES6#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4440ES6#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 LTC4440ES6#TRPBF?
For technical support, including LTC4440ES6#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4440ES6#TRPBF requirements.
6.How does Aetrix verify that LTC4440ES6#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4440ES6#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 LTC4440ES6#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC4440ES6#TRPBF?
All LTC4440ES6#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4440ES6#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 LTC4440ES6#TRPBF part is unused and in its original packaging.
Return procedure for LTC4440ES6#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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