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Analog Devices Inc. LT3758HMSE#TRPBF
- Part No.:
- LT3758HMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT3758HMSE#TRPBF.pdf
- Description:
- IC REG CTRLR MULT TOP 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,798
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Product details
Overview
LT3758HMSE#TRPBF from Analog Devices is a wide-input (5.5V–100V), current-mode DC/DC controller supporting boost, flyback, SEPIC, and inverting topologies with single-feedback-pin polarity selection. It drives external N-channel MOSFETs, features 100kHz–1MHz programmable switching frequency, <1µA shutdown current, and AEC-Q100 qualification for automotive power supplies.
For engineers reviewing the LT3758HMSE#TRPBF datasheet, LT3758HMSE#TRPBF pinout, LT3758HMSE#TRPBF application, or LT3758HMSE#TRPBF equivalent, this controller delivers precise negative/positive output voltage regulation, robust input UVLO with hysteresis, internal 7.2V LDO, soft-start, and frequency synchronization - critical for high-reliability industrial and telecom power designs.
Technical Context
The LT3758HMSE#TRPBF implements fixed-frequency current-mode control with slope compensation, enabling stable operation across wide VIN (5.5V–100V) and VOUT ranges. Its dual-reference error amplifier (1.6V for positive, –0.8V for negative FBX configurations) supports topology-agnostic feedback while maintaining ±0.5% regulation accuracy over temperature.
It integrates a 7.2V low-dropout regulator (4.5V UVLO, 17.5V OVLO) powering the gate driver and logic, with thermal shutdown at 165°C and INTVCC current limiting to prevent on-chip dissipation overload. The 10-lead MSOP package includes an exposed pad for θJA = 40°C/W thermal performance at TJ up to 150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 5.5V to 100V - enables direct battery or bus rail connection without pre-regulation in automotive and industrial systems. |
| Switching Frequency | 100kHz to 1MHz (RT-programmable) - balances efficiency vs. magnetics size; supports synchronization to external clock. |
| FBX Regulation Voltage | +1.6V (positive output) or –0.8V (negative output) - single-pin polarity selection eliminates need for separate mode pins. |
| SENSE Threshold | 110mV (typical) - sets accurate peak current limit for overcurrent protection and cycle-by-cycle control. |
| Shutdown IQ | <1µA - preserves battery life in always-on vehicle subsystems and remote sensors. |
| INTVCC Regulator | 7.2V ±0.2V, 50mA max - powers gate driver and internal circuitry; bypassed by ≥4.7µF ceramic capacitor. |
| Operating Junction Temp | –40°C to +150°C - qualified for under-hood automotive applications per AEC-Q100 Grade H. |
Pinout & Package
LT3758HMSE#TRPBF uses a 10-lead plastic MSOP package (3mm × 3mm) with exposed thermal pad (Pin 11 = GND). The exposed pad must be soldered to PCB ground for thermal integrity and noise immunity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VC (Pin 1) | Error amplifier compensation node | Connects external RC network to stabilize voltage loop; clamped during soft-start. |
| FBX (Pin 2) | Positive/negative feedback input | Dual-reference input (1.6V or –0.8V) enabling topology-flexible output regulation without hardware change. |
| SS (Pin 3) | Soft-start control | 10µA pull-up to 2.5V rail; external capacitor sets ramp time; reset by UVLO or thermal fault. |
| RT (Pin 4) | Frequency programming | Resistor-to-GND sets switching frequency (100kHz–1MHz); open-circuit disables operation. |
| SYNC (Pin 5) | External clock sync input | Accepts digital clock; requires RT set 20% below SYNC frequency; tied to GND if unused. |
| SENSE (Pin 6) | Current sense input | Kelvin-connected to MOSFET source-side sense resistor; ±0.3V absolute max; enables cycle-by-cycle current limiting. |
| GATE (Pin 7) | N-MOSFET gate driver output | Swings between INTVCC and GND; forced low during shutdown, thermal lockout, or INTVCC fault. |
| INTVCC (Pin 8) | Internal LDO output | 7.2V regulated supply for gate driver and logic; requires ≥4.7µF local ceramic bypass; can be externally powered above 7.5V. |
| SHDN/UVLO (Pin 9) | Enable/undervoltage detection | 1.22V falling threshold with programmable hysteresis; <0.4V forces shutdown; 2µA pull-down enables precise turn-on/off voltage setting. |
| VIN (Pin 10) | Main input supply | 5.5V–100V input; requires ≥0.22µF local ceramic bypass; powers internal LDO and bias circuits. |
| Exposed Pad (Pin 11) | Thermal and signal ground | Must be soldered to PCB ground plane; serves as GND reference and current-sense return path. |
Key Features
| Feature | Design Value |
|---|---|
| Wide input voltage range | 5.5V to 100V operation eliminates need for front-end pre-regulators in 24V/48V industrial and 12V/24V automotive systems. |
| Single-pin output polarity selection | FBX pin accepts either positive or negative feedback divider - simplifies BOM and layout across boost/flyback/inverting designs. |
| Programmable frequency with sync | RT resistor sets 100kHz–1MHz range; SYNC pin allows deterministic timing alignment with system clocks or other converters. |
| AEC-Q100 Grade H qualification | Rated for –40°C to +150°C junction temperature - validated for engine control units, ADAS cameras, and infotainment power rails. |
| Low shutdown quiescent current | <1µA shutdown IQ enables multi-year battery life in telematics modules and always-on vehicle networks. |
| Integrated 7.2V LDO with protection | Includes 4.5V UVLO, 17.5V OVLO, and current limiting - ensures reliable gate drive even during input transients or load faults. |
Applications
| Automotive Power Supply | Industrial Telecom PSU |
|---|---|
Use Scenario: 12V/24V battery-fed ECU supplying 5V/3.3V logic and 12V analog sensors in engine bay. IC Role / Device Role / Timing Role: Flyback controller generating isolated 12V and 5V outputs with tight cross-regulation. Use Value: AEC-Q100 Grade H rating and 150°C max junction temperature ensure reliability under hood thermal stress. |
Use Scenario: 48V telecom rectifier feeding distributed 12V/5V loads in base station power shelves. IC Role / Device Role / Timing Role: Boost controller stepping 36V–72V input to 12V intermediate bus with high efficiency at partial load. Use Value: 100V absolute max VIN withstands lightning surge transients; programmable UVLO prevents brownout restarts. |
| High-Voltage Industrial Sensor | Isolated Inverter Gate Driver Supply |
Use Scenario: 72V DC bus powering isolated current/voltage sensing circuits in motor drives. IC Role / Device Role / Timing Role: SEPIC controller delivering non-inverting 15V output with input-to-output isolation via coupled inductor. Use Value: Single FBX pin simplifies feedback design; current-mode control maintains stability across wide input and load variations. |
Use Scenario: Generating isolated ±15V gate drive supplies for IGBTs in three-phase inverters. IC Role / Device Role / Timing Role: Inverting controller producing negative output from 12V auxiliary rail to bias IGBT emitter terminals. Use Value: –0.8V FBX reference enables precise negative regulation; soft-start prevents gate driver latch-up during power-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage DC/DC controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3891EMSE#PBF | 40V max VIN, integrated gate drivers, no negative FBX capability, 500kHz max frequency | Better suited for lower-voltage industrial SMPS where input is ≤40V and only positive outputs needed | Select LTC3891EMSE#PBF when input voltage stays below 40V and integrated drivers reduce component count. |
| LM5165QDGSRQ1 | 65V max VIN, 1.5A integrated FET, fixed 2.1MHz frequency, no sync or polarity flexibility | Targeted at space-constrained automotive body electronics requiring monolithic solution | Choose LM5165QDGSRQ1 for compact 65V-input buck regulators where board area is critical and topology is fixed. |
Compared with LTC3891EMSE#PBF and LM5165QDGSRQ1, the LT3758HMSE#TRPBF uniquely supports 100V input, dual-polarity feedback, and external MOSFET drive - making it the only option for ruggedized flyback/SEPIC designs in automotive and telecom infrastructure.
Availability
LT3758HMSE#TRPBF is available at Aetrix Electronics and suitable for automotive ECUs, industrial telecom power supplies, and high-voltage sensor interfaces requiring stable component supply, long-term lifecycle support, and AEC-Q100 compliance.
Supply support for LT3758HMSE#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 is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LT3758 product line delivers high-voltage, topology-flexible DC/DC controllers for demanding power conversion applications where input range, reliability, and thermal robustness are critical - especially in automotive and industrial environments.
FAQ
What is the maximum input voltage rating for the LT3758HMSE#TRPBF?
The LT3758HMSE#TRPBF has an absolute maximum input voltage (VIN) rating of 100V, with guaranteed operation from 5.5V to 100V. This enables direct connection to 48V telecom buses, 72V industrial rails, and 12V/24V automotive batteries with surge margin. Exceeding 100V risks permanent damage per Absolute Maximum Ratings.
How does the LT3758HMSE#TRPBF support both positive and negative output voltages?
The LT3758HMSE#TRPBF uses a dual-reference error amplifier: FBX regulates to +1.6V for positive outputs (boost/flyback/SEPIC) or –0.8V for negative outputs (inverting topology). The same pin accepts either configuration via external resistor divider - no mode pins or external logic required. This simplifies design reuse across multiple power architectures.
What is the purpose of the exposed pad on the LT3758HMSE#TRPBF MSOP package?
The exposed pad (Pin 11) on the LT3758HMSE#TRPBF serves as both thermal conduction path and signal ground. It must be soldered to a PCB ground plane to achieve θJA = 40°C/W and maintain safe junction temperature up to 150°C. It also functions as the Kelvin return for the SENSE pin, minimizing noise coupling into the current-sense path.
Can the LT3758HMSE#TRPBF synchronize its switching frequency to an external clock?
Yes - the LT3758HMSE#TRPBF supports frequency synchronization via the SYNC pin (Pin 5). When driven with a clean digital clock, the controller locks to that frequency. An RT resistor must be selected to program a free-running frequency ~20% slower than the SYNC signal to ensure reliable locking. If unused, SYNC must be tied to GND.
What is the shutdown current specification for the LT3758HMSE#TRPBF?
The LT3758HMSE#TRPBF draws less than 1µA of input supply current (VIN IQ) when SHDN/UVLO is pulled below 0.4V. This ultra-low shutdown current extends battery life in always-on automotive modules such as telematics units, CAN gateways, and remote keyless entry receivers - critical for meeting OEM quiescent power requirements.
LT3758HMSE#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Type:
- Transistor Driver
- Function:
- Step-Up, Step-Up/Step-Down
- Output Configuration:
- Positive or Negative, Isolation Capable
- Topology:
- Boost, Flyback, SEPIC
- Number of Outputs:
- 1
- Output Phases:
- 1
- Voltage - Supply (Vcc/Vdd):
- 5.5V ~ 100V
- Frequency - Switching:
- 100kHz ~ 1MHz
- Duty Cycle (Max):
- -
- Synchronous Rectifier:
- No
- Clock Sync:
- Yes
- Serial Interfaces:
- -
- Control Features:
- Enable, Frequency Control, Soft Start
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP-EP
LT3758HMSE#TRPBF FAQ
1.How can I place an order for LT3758HMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3758HMSE#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 LT3758HMSE#TRPBF reliable?
The price and inventory of LT3758HMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3758HMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LT3758HMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3758HMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3758HMSE#TRPBF?
LT3758HMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3758HMSE#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 LT3758HMSE#TRPBF?
For technical support, including LT3758HMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3758HMSE#TRPBF requirements.
6.How does Aetrix verify that LT3758HMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT3758HMSE#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 LT3758HMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LT3758HMSE#TRPBF?
All LT3758HMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3758HMSE#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 LT3758HMSE#TRPBF part is unused and in its original packaging.
Return procedure for LT3758HMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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