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Analog Devices Inc. LT3758MPMSE#TRPBF
- Part No.:
- LT3758MPMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT3758MPMSE#TRPBF.pdf
- Description:
- IC REG CTRLR MULT TOP 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,666
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Product details
Overview
LT3758MPMSE#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 external N-channel MOSFETs via a 7.2V internal LDO, features 100kHz–1MHz adjustable switching frequency, <1µA shutdown current, and AEC-Q100 qualification for automotive use.
For engineers reviewing the LT3758MPMSE#TRPBF datasheet, LT3758MPMSE#TRPBF pinout, LT3758MPMSE#TRPBF application, or LT3758MPMSE#TRPBF equivalent, this page delivers verified functional identity, validated MSOP-10 pin mapping, confirmed –55°C to 150°C operating range, and two rigorously cross-checked alternative parts with documented technical and application differences.
Technical Context
The LT3758MPMSE#TRPBF implements fixed-frequency current-mode control with slope compensation, enabling stable regulation across wide VIN and VOUT ranges. Its dual-reference feedback architecture (1.6V for positive outputs, –0.8V for negative outputs) allows single-pin FBX programming of polarity and regulation setpoint.
It integrates a 7.2V low-dropout regulator (4.5V UVLO, 17.5V OVLO), programmable SHDN/UVLO with hysteresis, soft-start via SS pin, and frequency foldback during overcurrent. The SYNC pin supports external clock synchronization when RT is set 20% below target frequency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 5.5V to 100V - supports direct connection to 48V telecom, 72V industrial, or 12V–96V automotive battery rails without pre-regulation. |
| Feedback Reference | 1.6V (positive output) or –0.8V (negative output) - enables polarity selection and precise output regulation using one FBX pin. |
| Switching Frequency | 100kHz to 1MHz - set by RT resistor; higher frequencies reduce magnetics size but increase gate drive loss; minimum on/off time = 220ns. |
| SENSE Threshold | 110mV (typical) - defines peak switch current limit; used with external sense resistor to protect MOSFET and inductor during overload. |
| Shutdown IQ | <1µA - ensures ultra-low power consumption in battery-backed systems during standby or fault conditions. |
| Operating Temp | –55°C to +150°C - fully tested and guaranteed; suitable for under-hood automotive, downhole, or high-reliability industrial environments. |
| Package | 10-Lead MSOP (3mm × 3mm) with exposed pad - provides θJA = 40°C/W thermal resistance when soldered to PCB ground plane. |
Pinout & Package
LT3758MPMSE#TRPBF uses a 10-lead plastic MSOP package (3mm × 3mm) with exposed thermal pad (Pin 11 = GND). The exposed pad must be soldered to a PCB ground plane for thermal and electrical integrity.
| 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 and fault conditions. |
| FBX (Pin 2) | Positive/negative feedback input | Sets output voltage polarity and regulation point (1.6V or –0.8V); modulates frequency during start-up and overcurrent. |
| SS (Pin 3) | Soft-start timing control | 10µA internal pull-up charges external capacitor; reset by UVLO, INTVCC fault, or thermal lockout. |
| RT (Pin 4) | Frequency programming input | Resistor to GND sets switching frequency; open-circuit disables operation; required for all configurations. |
| SYNC (Pin 5) | External clock synchronization input | Accepts digital clock signal; forces LT3758MPMSE#TRPBF to operate at SYNC frequency if RT is set 20% lower. |
| SENSE (Pin 6) | Current sense amplifier input | Kelvin-connected to source-side of sense resistor; monitors switch current for cycle-by-cycle limiting and control loop. |
| GATE (Pin 7) | N-channel MOSFET gate driver output | Drives external FET 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; bypassed with ≥4.7µF ceramic cap; can be externally powered to disable LDO. |
| SHDN/UVLO (Pin 9) | Enable/disable and input undervoltage detection | 1.22V falling threshold with programmable hysteresis; resets soft-start on undervoltage; <0.4V disables IC. |
| VIN (Pin 10) | Main input supply | Accepts 5.5V–100V; requires local 0.22µF+ ceramic bypass; powers internal LDO and supplies gate driver when INTVCC is bypassed. |
Key Features
| Feature | Design Value |
|---|---|
| Wide input voltage range | 5.5V to 100V operation eliminates need for input pre-regulators in 24V–72V industrial and automotive systems. |
| Single-pin polarity programming | FBX pin accepts either positive or negative feedback divider - simplifies BOM and layout for dual-polarity power designs. |
| Programmable frequency & sync | RT resistor sets 100kHz–1MHz range; SYNC pin enables deterministic timing alignment with system clocks or other converters. |
| Low shutdown quiescent current | <1µA shutdown IQ extends battery life in always-on telemetry, remote sensors, and safety-critical backup circuits. |
| AEC-Q100 qualified grade | MP grade (–55°C to +150°C) meets automotive reliability requirements - qualified per AEC-Q100 Rev H for under-hood use. |
Applications
| Automotive Battery Management | Industrial Telecom Power |
|---|---|
|
Use Scenario: Generating isolated ±15V rails from 12V–48V vehicle battery for CAN transceivers and sensor interfaces. IC Role / Device Role / Timing Role: Flyback controller regulating negative output via FBX reference; synchronized to system clock via SYNC pin. Use Value: Eliminates need for separate positive/negative controllers; AEC-Q100 MP grade ensures operation at under-hood temperatures up to 150°C. |
Use Scenario: 48V-to-56V boost converter powering PoE++ midspans in telecom infrastructure cabinets. IC Role / Device Role / Timing Role: High-efficiency boost controller driving 100V-rated MOSFET; RT set to 300kHz for optimal core loss vs. size trade-off. Use Value: 100V absolute max VIN rating avoids derating concerns; 7.2V INTVCC LDO sustains gate drive even during 48V brownouts. |
| High-Voltage Industrial Sensors | Ruggedized Medical Imaging Supply |
|
Use Scenario: 24V-to-100V SEPIC converter powering high-voltage bias supplies for MEMS pressure sensors in oil/gas downhole tools. IC Role / Device Role / Timing Role: Non-isolated SEPIC controller with programmable UVLO hysteresis to tolerate intermittent battery dips in harsh environments. Use Value: –55°C to +150°C guaranteed operation enables deployment in extreme temperature wells; exposed-pad MSOP aids thermal management. |
Use Scenario: Inverting converter generating –24V from 24V main rail to power analog front-end amplifiers in portable ultrasound units. IC Role / Device Role / Timing Role: Negative-output inverter using –0.8V FBX reference; soft-start prevents inrush into capacitive imaging loads. Use Value: Single-controller solution reduces board area and EMI sources; <1µA shutdown IQ preserves battery charge during standby. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-input-voltage DC/DC controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3891EMSE#PBF | Fixed 150kHz frequency; no FBX polarity switching; supports only positive outputs; integrated gate drivers for dual-phase operation. | Best suited for fixed-frequency, single-output boost applications where simplicity and phase interleaving are prioritized over polarity flexibility. | Select LTC3891EMSE#PBF when designing non-inverting boost converters requiring dual-phase capability and minimal external components. |
| LM5165QPWPRQ1 | Lower VIN max (65V); fixed 2.1MHz frequency; integrated 65V MOSFET; no SYNC or programmable frequency; smaller 10-pin WSON package. | Ideal for space-constrained, medium-power (≤500mA) automotive modules needing high integration and small footprint. | Choose LM5165QPWPRQ1 for compact, cost-sensitive 12V–48V automotive subsystems where 65V VIN ceiling is acceptable and external FET drive is unnecessary. |
Compared with LTC3891EMSE#PBF and LM5165QPWPRQ1, the LT3758MPMSE#TRPBF uniquely supports both positive and negative outputs from one FBX pin, offers full 100kHz–1MHz programmability, and guarantees operation down to –55°C - making it the only option among the three qualified for extreme-temperature, dual-polarity, or high-VIN (>65V) applications.
Availability
LT3758MPMSE#TRPBF is available at Aetrix Electronics and suitable for automotive battery management, industrial telecom power, high-voltage sensor conditioning, and ruggedized medical imaging supplies requiring stable component supply across extended temperature and voltage ranges.
Supply support for LT3758MPMSE#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 digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The LT3758 product line delivers robust, wide-input DC/DC controllers for demanding power conversion tasks - designed specifically for automotive, telecom, and industrial systems requiring reliability across extreme voltage and temperature conditions.
FAQ
What is the guaranteed operating temperature range for LT3758MPMSE#TRPBF?
The LT3758MPMSE#TRPBF is 100% tested and guaranteed over –55°C to +150°C junction temperature. This MP grade exceeds standard automotive (–40°C to +125°C) and industrial (–40°C to +105°C) specifications, enabling deployment in under-hood, downhole, or high-ambient industrial environments where thermal stress is critical. All electrical parameters in the datasheet apply across this full range.
Can LT3758MPMSE#TRPBF generate both positive and negative output voltages?
Yes, the LT3758MPMSE#TRPBF supports both polarities using its dual-reference FBX pin: 1.6V for positive outputs (boost/flyback/SEPIC) and –0.8V for negative outputs (inverting topology). The controller automatically selects the active error amplifier based on FBX voltage level - no external mode-select pins or configuration registers are required. This simplifies design of dual-rail or bipolar supplies.
How does the SHDN/UVLO pin function in LT3758MPMSE#TRPBF?
The SHDN/UVLO pin on LT3758MPMSE#TRPBF serves dual functions: a 1.22V falling-threshold enable/disable control and an accurate input undervoltage detector. When pulled above 1.22V, the device operates; below 0.4V, it enters shutdown with <1µA IQ. Hysteresis is programmable via external resistors, allowing precise turn-on/turn-off thresholds for battery-powered or brownout-prone systems.
What is the purpose of the INTVCC pin on LT3758MPMSE#TRPBF?
The INTVCC pin on LT3758MPMSE#TRPBF delivers a regulated 7.2V supply for internal circuitry and the gate driver. It is generated from VIN via an internal LDO with 4.5V UVLO and 17.5V OVLO protection. To reduce power loss, INTVCC can be bypassed by connecting it directly to VIN (if ≤17.5V) or to a clean external 7.5V–17.5V source - disabling the LDO while maintaining gate drive capability.
Is LT3758MPMSE#TRPBF pin-compatible with other LT3758 variants?
Yes, LT3758MPMSE#TRPBF shares identical pinout and footprint with all LT3758/LT3758A MSOP-10 variants (e.g., LT3758EMSE#TRPBF, LT3758HMSE#TRPBF). The MP grade differs only in extended temperature testing and AEC-Q100 qualification - not in electrical behavior, pin assignment, or package dimensions. Layouts designed for any LT3758xMSE part are directly reusable.
LT3758MPMSE#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
LT3758MPMSE#TRPBF FAQ
1.How can I place an order for LT3758MPMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3758MPMSE#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 LT3758MPMSE#TRPBF reliable?
The price and inventory of LT3758MPMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3758MPMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LT3758MPMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3758MPMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3758MPMSE#TRPBF?
LT3758MPMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3758MPMSE#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 LT3758MPMSE#TRPBF?
For technical support, including LT3758MPMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3758MPMSE#TRPBF requirements.
6.How does Aetrix verify that LT3758MPMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT3758MPMSE#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 LT3758MPMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LT3758MPMSE#TRPBF?
All LT3758MPMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3758MPMSE#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 LT3758MPMSE#TRPBF part is unused and in its original packaging.
Return procedure for LT3758MPMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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