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Analog Devices Inc. LTC4440ES6#TRMPBF
- Part No.:
- LTC4440ES6#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Gate Drivers
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LTC4440ES6#TRMPBF.pdf
- Description:
- IC GATE DRVR HIGH-SIDE TSOT23-6
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LTC4440ES6#TRMPBF from Analog Devices (formerly Linear Technology) is a high-speed, high-voltage high-side N-channel MOSFET gate driver designed for synchronous full-bridge and phase-modulated converters operating with input voltages up to 80V and transient tolerance to 100V. It delivers 2.4A peak pull-up current and 1.5Ω pull-down impedance, achieves 10ns rise/7ns fall times into 1nF, and features supply-independent TTL/CMOS inputs with 350mV hysteresis - enabling robust control of power MOSFETs in telecom and server power supplies.
For engineers reviewing the LTC4440ES6#TRMPBF datasheet, LTC4440ES6#TRMPBF pinout, LTC4440ES6#TRMPBF application, or LTC4440ES6#TRMPBF equivalent, key selection criteria include its SOT-23-6 package, 80V max TS voltage rating, 1.5Ω pull-down resistance, 2.4A peak pull-up current, and dual UVLO protection on VCC and BOOST–TS rails - all critical for high-density isolated DC/DC designs requiring fast switching and transient resilience.
Technical Context
The LTC4440ES6#TRMPBF employs a level-shifted input stage that accepts ground-referenced TTL/CMOS logic and internally shifts it to the bootstrapped high-side domain (up to 115V above ground), eliminating external isolation components. Its output stage combines an NPN bipolar pull-up (2.4A peak) and NMOS pull-down (1.5Ω typical) to drive capacitive gate loads with minimal transition losses.
It integrates independent undervoltage lockout circuits for both the low-side supply (VCC UV+ = 6.3V, UV– = 6.0V) and high-side bootstrap supply (BOOST–TS UV+ = 7.4V, UV– = 6.9V), ensuring safe disablement during supply brownouts. The device operates across –40°C to +85°C and is rated for continuous TS voltage up to 80V with 100V/100ms transient capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max TS Voltage | 80V continuous - supports operation in 48V/60V/72V telecom and industrial bus systems with headroom for transients. |
| Peak Pull-Up Current | 2.4A - enables rapid charging of high-Qg MOSFET gates (e.g., Si7852DP) to minimize conduction loss in high-frequency bridges. |
| Pull-Down Resistance | 1.5Ω - ensures strong gate discharge to prevent shoot-through during high-dV/dt transitions in full-bridge topologies. |
| Rise/Fall Time (1nF) | 10ns/7ns - reduces MOSFET switching time in the linear region, directly lowering power loss in 300kHz–1MHz converters. |
| VCC UVLO Threshold | 6.3V rising / 6.0V falling - provides 300mV hysteresis to prevent oscillation during marginal supply conditions. |
| Input Hysteresis | 350mV - rejects noise-induced false triggering in noisy power stage environments without external Schmitt triggers. |
| Operating Temp Range | –40°C to +85°C - qualified for industrial and telecom equipment deployed in uncontrolled ambient environments. |
Pinout & Package
Package: 6-lead TSOT-23 (S6), 1.0mm max height, JEDEC MO-193 compliant. Exposed pad not present - thermal path relies on standard PCB copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INP (Pin 1) | Logic Input | Ground-referenced TTL/CMOS-compatible signal; internal level-shifting enables direct interface with controller ICs like LTC3722-1. |
| GND (Pins 2, 4) | Low-Side Reference | Dual ground pins reduce common-impedance coupling between input and supply return paths. |
| VCC (Pin 3) | Low-Side Supply | Powers internal logic and level shifter; requires local 0.1µF ceramic bypass to GND for nanosecond-scale current delivery. |
| TS (Pin 8) | High-Side Source | Connects to source of driven N-MOSFET; serves as reference for TG output and BOOST–TS UVLO monitoring. |
| TG (Pin 7) | Gate Driver Output | Swings between TS and BOOST; drives MOSFET gate with rail-to-rail swing (within ~0.7V of BOOST due to NPN emitter follower). |
| BOOST (Pin 6) | Bootstrap Supply | Connected via external capacitor to TS; voltage swings up to VIN + VCC – Vf(diode); powers high-side output stage. |
Key Features
| Feature | Design Value |
|---|---|
| Supply-Independent Input Thresholds | VIH = 1.6V, VIL = 1.25V (350mV hysteresis) - eliminates need for level translators when interfacing with 3.3V/5V controllers. |
| High-Voltage Transient Tolerance | Withstands 100V/100ms transients on TS - protects against load dump or inductive kick in 48V/60V systems without external clamping. |
| Fast Switching with Low Impedance Drive | 1.5Ω pull-down + 2.4A pull-up - actively discharges gate capacitance faster than discrete solutions, suppressing Miller-induced turn-on. |
| Dual Independent UVLO Protection | Separate VCC and BOOST–TS lockouts - prevents partial enablement and ensures both low- and high-side supplies are valid before driving. |
| Thermally Optimized SOT-23 | θJA = 230°C/W - suitable for moderate-power applications (<5W dissipation) with adequate PCB copper area. |
Applications
| Telecom Power Modules | Server VRMs |
|---|---|
Use Scenario: 48V–72V input isolated full-bridge DC/DC converter delivering 12V/35A in compact 1U server PSUs. IC Role / Device Role / Timing Role: High-side gate driver for Si7852DP MOSFETs in primary-side synchronous rectification, synchronized to LTC3722-1 controller. Use Value: 10ns rise time minimizes dead-time loss; 80V TS rating accommodates 72V nominal + 10% margin without derating. |
Use Scenario: High-density 1/4-brick 42V–56V input to 12V/20A isolated supply using LTC3723-1 controller and Si7370DP/Si7852DP FETs. IC Role / Device Role / Timing Role: High-side driver for upper bridge FETs in phase-modulated full-bridge topology; handles 100V transients during hot-swap events. Use Value: Dual UVLO prevents erratic switching during brownout; 2.4A peak current ensures reliable turn-on of high-threshold MOSFETs at full load. |
| Distributed Power Architectures | Industrial Motor Drives |
Use Scenario: Point-of-load (POL) converter in distributed 24V/48V bus systems powering FPGA or ASIC core rails. IC Role / Device Role / Timing Role: High-side driver in half-bridge or active clamp forward topology, paired with LTC4440ES6#TRMPBF on complementary leg. Use Value: SOT-23-6 footprint saves board space vs. MSOP; 350mV input hysteresis rejects EMI from adjacent power stages. |
Use Scenario: Gate driver for high-side IGBTs/MOSFETs in 3-phase inverter stages of servo drives operating from 60V DC bus. IC Role / Device Role / Timing Role: Level-shifted gate driver enabling single-supply control of high-side switches referenced to floating DC link. Use Value: 100V transient rating protects against inductive flyback spikes; 1.5Ω pull-down suppresses shoot-through during PWM dead-time. |
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 | Same core specs but in thermally enhanced 8-lead MSOP with exposed GND pad (θJA = 40°C/W); higher temp grade (–40°C to +125°C). | Suitable for higher-power or extended-temperature applications where SOT-23 thermal limits are exceeded. | Select when >1W dissipation or ambient >85°C is expected; requires different PCB layout and soldering process for exposed pad. |
| LTC4442ES6#TRMPBF | Lower voltage rating (38V max TS), narrower VCC range (6V–9.5V), no BOOST–TS UVLO, but same SOT-23-6 package and 2.4A/1.5Ω drive. | Targeted at lower-input-voltage applications (e.g., 12V/24V systems); lacks transient resilience for telecom/server use. | Choose only for cost-sensitive, low-voltage designs where 80V/100V capability is unnecessary; not drop-in compatible due to UVLO and voltage limits. |
Compared with LTC4440IMS8E#TRPBF, the LTC4440ES6#TRMPBF trades thermal performance and temperature range for smaller footprint and lower assembly cost; compared with LTC4442ES6#TRMPBF, it adds critical 80V/100V operation and dual UVLO - making it the only option among the three qualified for 48V+ telecom infrastructure.
Availability
LTC4440ES6#TRMPBF is available at Aetrix Electronics and suitable for telecom power modules, server VRMs, and distributed power architectures requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for LTC4440ES6#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 high-performance analog and power management portfolio. Linear pioneered precision analog ICs and remains synonymous with rugged, high-reliability power solutions.
The LTC4440 series was developed specifically for high-efficiency isolated DC/DC converters in telecom and datacenter power systems, emphasizing transient resilience, fast switching, and integrated protection - distinguishing it from general-purpose gate drivers.
FAQ
What is the maximum continuous voltage rating on the TS pin of the LTC4440ES6#TRMPBF?
The LTC4440ES6#TRMPBF has a maximum continuous TS voltage rating of 80V, as specified in the Absolute Maximum Ratings table. This allows direct use in 48V, 60V, and 72V input power systems with sufficient margin for ripple and regulation tolerance. The device also withstands 100V transients for up to 100ms without functional interruption.
Does the LTC4440ES6#TRMPBF require an external bootstrap diode?
Yes, the LTC4440ES6#TRMPBF requires an external bootstrap diode connected between VCC and BOOST. The diode charges the external BOOST–TS capacitor during the low-side switch conduction period. A fast-switching, low-forward-voltage diode such as BAS21 or MMBD914 is recommended to minimize voltage drop and ensure reliable high-side operation.
Can the LTC4440ES6#TRMPBF drive both high-side and low-side N-channel MOSFETs in the same bridge?
No - the LTC4440ES6#TRMPBF is a dedicated high-side gate driver only. It references its output (TG) to TS, not ground, and cannot sink current to ground. For low-side drive, a separate ground-referenced driver (e.g., LTC4442 or discrete buffer) is required. Using it for low-side would violate absolute maximum ratings on the TS pin.
What is the purpose of the dual undervoltage lockout (UVLO) in the LTC4440ES6#TRMPBF?
The LTC4440ES6#TRMPBF implements two independent UVLO circuits: one monitors VCC (6.3V rising / 6.0V falling) and the other monitors BOOST–TS (7.4V rising / 6.9V falling). Both must be satisfied for normal operation. If either supply drops below its threshold, the output is actively pulled low to TS, preventing partial or unsafe gate drive - a critical safety feature in high-voltage power conversion.
How does the input hysteresis of the LTC4440ES6#TRMPBF improve system reliability?
The LTC4440ES6#TRMPBF features 350mV of input hysteresis (VIH – VIL = 1.6V – 1.25V), which prevents multiple toggling of the output during slow or noisy input transitions. This eliminates false triggering caused by ringing, EMI, or ground bounce - especially important in high-frequency, high-dV/dt power stages where the INP pin is routed near switching nodes.
LTC4440ES6#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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
LTC4440ES6#TRMPBF FAQ
1.How can I place an order for LTC4440ES6#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4440ES6#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#TRMPBF reliable?
The price and inventory of LTC4440ES6#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#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC4440ES6#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4440ES6#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4440ES6#TRMPBF?
LTC4440ES6#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4440ES6#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#TRMPBF?
For technical support, including LTC4440ES6#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4440ES6#TRMPBF requirements.
6.How does Aetrix verify that LTC4440ES6#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC4440ES6#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#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC4440ES6#TRMPBF?
All LTC4440ES6#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4440ES6#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#TRMPBF part is unused and in its original packaging.
Return procedure for LTC4440ES6#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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