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Analog Devices Inc. LT3758AMPMSE#TRPBF
- Part No.:
- LT3758AMPMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT3758AMPMSE#TRPBF.pdf
- Description:
- IC REG CTRLR MULT TOP 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,086
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Product details
Overview
LT3758AMPMSE#TRPBF from Analog Devices is a wide-input, current-mode DC/DC controller for boost, flyback, SEPIC, and inverting topologies, supporting 5.5V to 100V input and programmable positive/negative output voltages. It drives an external N-channel MOSFET with an internal 7.2V LDO, features 100kHz–1MHz adjustable switching frequency, <1µA shutdown current, and AEC-Q100 qualification for automotive systems.
For engineers reviewing the LT3758AMPMSE#TRPBF datasheet, LT3758AMPMSE#TRPBF pinout, LT3758AMPMSE#TRPBF application, or LT3758AMPMSE#TRPBF equivalent, this page delivers verified functional identity, validated MSOP-10 pin mapping, confirmed –55°C to 150°C extended temperature operation, and two rigorously cross-referenced alternative controllers for high-voltage industrial and automotive power designs.
Technical Context
The LT3758AMPMSE#TRPBF implements fixed-frequency current-mode control with slope compensation, enabling stable regulation across wide VIN and VOUT ranges. Its dual feedback reference (1.6V for positive outputs, –0.8V for negative outputs) allows single-pin output polarity selection without external logic.
It integrates a programmable UVLO with hysteresis on SHDN/UVLO, soft-start via external capacitor on SS, frequency synchronization via SYNC pin, and overvoltage protection with 8% (positive) and 11% (negative) FBX thresholds. The internal 7.2V LDO powers the gate driver and supports external bypassing or direct VIN tie-off below 17.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5.5V to 100V - supports 24V/48V telecom, 12V–72V automotive, and industrial battery/bus inputs without pre-regulation. |
| Switching Frequency | 100kHz to 1MHz - set by RT resistor; enables optimization of efficiency vs. magnetics size in high-voltage converters. |
| Feedback Reference | +1.6V or –0.8V - single FBX pin supports both positive and negative output configurations without additional circuitry. |
| SENSE Threshold | 110mV (typical) - precise current limit detection for reliable overcurrent protection in high-side or low-side sensing layouts. |
| Shutdown Current | <1µA - enables long-term battery backup operation in always-on automotive or remote monitoring systems. |
| Operating Temp Range | –55°C to +150°C - fully tested and guaranteed for under-hood automotive, aerospace, and harsh industrial environments. |
| Package | 10-Lead MSOP (3mm × 3mm) with exposed pad - provides 40°C/W θJA thermal resistance when soldered to PCB ground plane. |
Pinout & Package
LT3758AMPMSE#TRPBF is housed in a 10-lead plastic MSOP package (3mm × 3mm) with exposed thermal pad (Pin 11 = GND), rated for –55°C to +150°C junction temperature and optimized for high-power density board layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VC (Pin 1) | Error amplifier compensation node | Accepts RC network to stabilize voltage loop; clamped during soft-start and fault conditions. |
| FBX (Pin 2) | Positive/negative output feedback input | Dual-reference input (1.6V or –0.8V) sets output regulation point and modulates frequency during faults. |
| SS (Pin 3) | Soft-start timing control | 10µA pull-up to 2.5V rail; external capacitor sets ramp time; reset by UVLO, INTVCC fault, or thermal lockout. |
| RT (Pin 4) | Frequency programming node | Resistor-to-GND sets switching frequency; open-circuit disables operation. |
| SYNC (Pin 5) | External clock synchronization input | Accepts digital clock signal; requires RT setting 20% slower than SYNC frequency for reliable locking. |
| SENSE (Pin 6) | Current sense amplifier input | Kelvin-connected to MOSFET source resistor; ±0.3V absolute max; enables accurate peak-current limiting. |
| GATE (Pin 7) | N-channel MOSFET gate driver output | Swings between INTVCC and GND; forced low during shutdown, thermal fault, or INTVCC UV/OV. |
| INTVCC (Pin 8) | Internal 7.2V LDO output | Powers gate driver and internal logic; bypass with ≥4.7µF ceramic; can be tied to VIN if ≤17.5V. |
| SHDN/UVLO (Pin 9) | Enable/disable and input UVLO control | 1.22V falling threshold with programmable hysteresis; <0.4V forces shutdown and reduces IQ to <1µA. |
| VIN (Pin 10) | Main input supply connection | Accepts 5.5V–100V; requires local 0.22µF+ ceramic bypass; powers internal LDO and bias circuits. |
| Exposed Pad (Pin 11) | Thermal and electrical ground | Must be soldered to PCB ground plane; serves as GND return and current-sense resistor negative terminal. |
Key Features
| Feature | Design Value |
|---|---|
| Wide input range (5.5V–100V) | Eliminates need for input pre-regulators in 24V/48V telecom, 12V–72V automotive, and industrial bus applications. |
| AEC-Q100 qualified (Grade MP) | 100% tested over –55°C to +150°C, meeting automotive reliability requirements for under-hood power supplies. |
| Programmable soft-start (SS pin) | Prevents inrush current and output overshoot during startup using a single external capacitor. |
| Frequency foldback during overload | Reduces switching frequency under short-circuit or heavy load to limit peak inductor current and improve fault recovery. |
| Internal 7.2V LDO with UV/OV protection | Ensures robust gate drive down to 4.5V INTVCC and protects MOSFET gate from >17.5V stress. |
| Synchronous operation support | Enables system-level EMI reduction and multi-phase coordination via SYNC pin with 200ns minimum pulse width. |
Applications
| Automotive Infotainment Power Supply | Industrial Telecom Rectifier |
|---|---|
|
Use Scenario: 12V–72V battery input powering 5V/3.3V rails for head unit processors and displays. IC Role / Device Role / Timing Role: Flyback controller regulating isolated 5V output with tight line/load regulation and fast transient response. Use Value: AEC-Q100 MP grade ensures operation at –40°C cold crank and +125°C under-hood ambient; <1µA shutdown extends battery life during vehicle sleep mode. |
Use Scenario: 48V telecom rectifier generating –48V or +54V outputs for base station equipment. IC Role / Device Role / Timing Role: Boost or SEPIC controller delivering regulated output from fluctuating -48V or +48V input bus. Use Value: 100V absolute max VIN withstands telecom surge transients; programmable UVLO prevents brownout restarts during line dips. |
| High-Voltage Industrial Sensor Node | Ruggedized Medical Imaging PSU |
|
Use Scenario: 24V–100V industrial fieldbus input powering isolated analog front-end and ADC supplies. IC Role / Device Role / Timing Role: Inverting controller generating –15V/–5V rails for op-amp biasing and precision signal conditioning. Use Value: Single FBX pin simplifies design for bipolar outputs; 110mV SENSE threshold enables accurate current limiting with low-value shunts. |
Use Scenario: Portable X-ray or ultrasound device requiring compact, reliable 24V–36V input to ±12V/±5V isolated outputs. IC Role / Device Role / Timing Role: Dual-output flyback controller with independent regulation and frequency foldback for fault containment. Use Value: –55°C to +150°C operation supports sterilization cycles and extended field use; exposed pad ensures thermal stability in sealed enclosures. |
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 |
|---|---|---|---|
| LTC3895EMSE#TRPBF | Fixed 150kHz–900kHz frequency range; no negative output capability; integrated bootstrap diode; lower max VIN (60V). | Better suited for high-efficiency synchronous buck applications where negative output is not required. | Select when designing non-inverting 12V–48V input buck regulators needing integrated bootstrap and tighter frequency tolerance. |
| LM5165QPWPRQ1 | Lower max VIN (65V); no programmable frequency; no negative output; integrated 65V MOSFET; smaller 8-pin SOIC package. | Targeted at space-constrained, cost-sensitive automotive body electronics with moderate power (<2W). | Select for entry-level automotive modules requiring minimal BOM count and footprint, but not for >65V or bipolar output needs. |
Compared with LTC3895EMSE#TRPBF and LM5165QPWPRQ1, the LT3758AMPMSE#TRPBF uniquely supports 100V input, programmable polarity outputs, and full –55°C to +150°C operation-making it the only choice for high-reliability, high-voltage, dual-polarity industrial and automotive power stages.
Availability
LT3758AMPMSE#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment, industrial telecom rectifiers, and ruggedized medical imaging power supplies requiring stable component supply across extended temperature and high-voltage operating conditions.
Supply support for LT3758AMPMSE#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 ICs, serving industrial, automotive, communications, and healthcare markets with precision, reliability, and innovation.
The LT3758A product line delivers high-voltage, current-mode DC/DC controllers optimized for demanding automotive and industrial applications requiring wide input range, bipolar output capability, and AEC-Q100 qualification.
FAQ
What is the guaranteed operating temperature range for LT3758AMPMSE#TRPBF?
The LT3758AMPMSE#TRPBF is 100% tested and guaranteed over –55°C to +150°C junction temperature. This extended range meets AEC-Q100 Grade MP requirements and supports under-hood automotive, aerospace, and industrial applications where extreme thermal cycling occurs. Data sheet specifications-including SENSE threshold, FBX regulation voltage, and shutdown current-are validated across this full range.
Can LT3758AMPMSE#TRPBF generate both positive and negative output voltages?
Yes, the LT3758AMPMSE#TRPBF supports both polarities using a single FBX pin. When configured for positive output (e.g., boost or SEPIC), FBX regulates to +1.6V; for negative output (e.g., inverting topology), FBX regulates to –0.8V. No external logic or configuration pins are needed-the feedback divider network automatically selects the correct reference based on its connection to VOUT or GND.
How does the LT3758AMPMSE#TRPBF handle input undervoltage conditions?
The LT3758AMPMSE#TRPBF uses the SHDN/UVLO pin to implement programmable input undervoltage lockout with hysteresis. With external resistors, users set precise turn-on (falling) and turn-off (rising) thresholds. A typical 1.22V internal reference and 2µA pull-down current enable accurate hysteresis calculation. An undervoltage event also resets the soft-start capacitor, preventing uncontrolled startup.
What is the purpose of the exposed thermal pad on the LT3758AMPMSE#TRPBF MSOP package?
The exposed pad (Pin 11) on the LT3758AMPMSE#TRPBF serves as both electrical ground and primary thermal path. It must be soldered directly to a PCB ground plane to achieve the specified 40°C/W θJA thermal resistance. This pad also functions as the negative terminal for the current-sense resistor, ensuring low-impedance Kelvin sensing and minimizing noise coupling into the SENSE node.
Does LT3758AMPMSE#TRPBF include overvoltage protection for the output?
Yes, the LT3758AMPMSE#TRPBF includes dual overvoltage protection: for positive outputs, FBX overvoltage lockout triggers at +8% above the +1.6V reference (i.e., ~1.73V); for negative outputs, it triggers at –11% below the –0.8V reference (i.e., ~–0.89V). Both conditions force the GATE pin low and hold the power switch off until FBX returns within safe limits-preventing damage during startup or short-circuit recovery.
LT3758AMPMSE#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:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP-EP
LT3758AMPMSE#TRPBF FAQ
1.How can I place an order for LT3758AMPMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3758AMPMSE#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 LT3758AMPMSE#TRPBF reliable?
The price and inventory of LT3758AMPMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3758AMPMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LT3758AMPMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3758AMPMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3758AMPMSE#TRPBF?
LT3758AMPMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3758AMPMSE#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 LT3758AMPMSE#TRPBF?
For technical support, including LT3758AMPMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3758AMPMSE#TRPBF requirements.
6.How does Aetrix verify that LT3758AMPMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT3758AMPMSE#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 LT3758AMPMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LT3758AMPMSE#TRPBF?
All LT3758AMPMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3758AMPMSE#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 LT3758AMPMSE#TRPBF part is unused and in its original packaging.
Return procedure for LT3758AMPMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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