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Analog Devices Inc. LT3758MPMSE#TRA1PBF
- Part No.:
- LT3758MPMSE#TRA1PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT3758MPMSE#TRA1PBF.pdf
- Description:
- IC REG CTRLR MULT TOP 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,104
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Product details
Overview
LT3758MPMSE#TRA1PBF 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 generating positive or negative regulated outputs. It drives an external N-channel MOSFET with a 7.2V internal LDO, features programmable 100kHz–1MHz switching frequency via RT pin, and delivers <1µA shutdown current - ideal for automotive 12V/24V/48V battery systems with stringent cold-crank and load-dump requirements.
For engineers reviewing the LT3758MPMSE#TRA1PBF datasheet, LT3758MPMSE#TRA1PBF pinout, LT3758MPMSE#TRA1PBF application, or LT3758MPMSE#TRA1PBF equivalent, this page provides verified functional identity, validated MSOP-10 pin mapping, confirmed –55°C to 150°C extended temperature operation, AEC-Q100 qualification status, and two technically documented alternative parts with explicit parameter-level differences.
Technical Context
The LT3758MPMSE#TRA1PBF implements fixed-frequency current-mode control using a slope-compensated PWM architecture with dual error amplifiers (for ±FBX regulation), enabling seamless transition between positive-output (1.6V FBX reference) and negative-output (–0.8V FBX reference) configurations without hardware change. Its SENSE pin accepts Kelvin-connected current-sense resistor signals with 110mV typical threshold and supports frequency foldback during overcurrent events.
It integrates a 7.2V LDO regulator (INTVCC) with 4.5V UVLO and 17.5V OVLO, programmable SHDN/UVLO with 1.22V falling threshold and external hysteresis, soft-start via SS pin with 10µA pull-up, and SYNC capability requiring RT biasing 20% below external clock frequency. The device operates across –55°C to 150°C junction range and is qualified per AEC-Q100 Grade 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5.5V to 100V - supports direct connection to automotive battery rails including cold-crank (4.5V min) and load-dump (100V max) transients. |
| Switching Frequency | 100kHz to 1MHz via RT resistor - enables optimization of magnetics size vs. efficiency; 220ns min on/off time limits practical duty cycle extremes. |
| Feedback Reference | +1.6V or –0.8V at FBX pin - allows single-pin programming of both positive and negative output voltages without external logic or configuration pins. |
| SENSE Threshold | 110mV typical - sets peak switch current limit with ±10mV temp drift over –55°C to 150°C, critical for consistent overcurrent protection in harsh environments. |
| Shutdown Current | <1µA at SHDN/UVLO = 0V - preserves battery life in always-on automotive modules such as telematics and ADAS sensors. |
| Operating Temp Range | –55°C to +150°C junction - fully tested and guaranteed, exceeding standard industrial and automotive grade requirements. |
| AEC-Q100 Grade | Qualified per Grade 1 (–40°C to +125°C ambient) and extended to –55°C to +150°C - meets reliability and stress-test requirements for under-hood applications. |
Pinout & Package
LT3758MPMSE#TRA1PBF uses a 10-lead plastic MSOP package (3mm × 3mm) with exposed pad (Pin 11) soldered to PCB ground for thermal and electrical integrity. θJA = 40°C/W with proper copper pour.
| 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) | Unified feedback input | Sets output regulation point: +1.6V for positive outputs, –0.8V for negative outputs; also triggers frequency foldback near GND. |
| SS (Pin 3) | Soft-start control | 10µA internal pull-up to 2.5V rail; external capacitor sets ramp time; reset by UVLO, OVLO, or thermal lockout. |
| RT (Pin 4) | Frequency programming | Resistor-to-GND sets switching frequency (100kHz–1MHz); open-circuit disables operation. |
| SYNC (Pin 5) | External clock synchronization | Accepts digital clock signal; requires RT biasing 20% slower than SYNC frequency; tied to GND when unused. |
| SENSE (Pin 6) | Current sense input | Kelvin-connected to high-side of sense resistor; compares against 110mV threshold for cycle-by-cycle current limiting. |
| GATE (Pin 7) | N-MOSFET gate driver output | Swings between INTVCC and GND; forced low during shutdown, thermal fault, or INTVCC UV/OV conditions. |
| INTVCC (Pin 8) | Internal 7.2V LDO output | Powers gate driver and internal circuitry; bypassed with ≥4.7µF ceramic cap; can be externally powered if >7.5V and <17.5V. |
| SHDN/UVLO (Pin 9) | Enable and input undervoltage detection | 1.22V falling threshold with programmable hysteresis; pulls VIN IQ to <1µA when ≤0.4V; resets soft-start on undervoltage. |
| VIN (Pin 10) | Main power input | Supplies internal LDO and bias circuits; must be bypassed with ≥0.22µF ceramic capacitor close to pin. |
| Exposed Pad (Pin 11) | Thermal & electrical ground | Must be soldered to PCB ground plane; serves as GND return and negative terminal for SENSE resistor. |
Key Features
| Feature | Design Value |
|---|---|
| Wide input voltage support | 5.5V–100V operation enables direct integration into 12V, 24V, and 48V automotive and industrial power rails without pre-regulation. |
| Dual-polarity feedback architecture | Single FBX pin supports both +1.6V and –0.8V references - eliminates need for external polarity-switching circuitry in bipolar supply designs. |
| Programmable frequency with sync | RT resistor sets 100kHz–1MHz range; SYNC pin allows deterministic timing alignment across multiple converters in noise-sensitive systems. |
| Low-power shutdown mode | <1µA VIN quiescent current extends battery runtime in always-on applications such as vehicle event recorders and remote sensors. |
| Robust thermal and electrical protection | Includes INTVCC UV/OV lockout, FBX overvoltage lockout (±8–11%), thermal shutdown, and cycle-by-cycle current limiting with 220ns response. |
Applications
| Automotive Infotainment Power Supply | Industrial Telecom DC-DC Converter |
|---|---|
|
Use Scenario: Generating isolated ±15V rails from a 24V truck battery for audio amplifiers and analog signal conditioning. IC Role / Device Role / Timing Role: Flyback controller regulating dual outputs with synchronous rectification; uses FBX pin for negative rail feedback and RT for 300kHz switching to minimize EMI in cabin environment. Use Value: AEC-Q100 qualification ensures reliability under vibration and thermal cycling; 100V abs max rating withstands ISO 7637-2 pulse 5a (100V/100ms) without external TVS. |
Use Scenario: Non-isolated 48V-to-12V SEPIC converter powering PoE midspans in outdoor telecom cabinets. IC Role / Device Role / Timing Role: High-voltage SEPIC controller with programmable UVLO hysteresis to prevent brownout oscillation during grid fluctuations. Use Value: 150°C max junction rating enables operation in sealed enclosures up to 85°C ambient; INTVCC bypassing scheme sustains gate drive under 1A peak load transients. |
| Railway Onboard Battery Charger | Heavy-Duty Equipment Sensor Hub |
|
Use Scenario: 72V-to-5V buck-derived inverting supply for CAN FD transceivers and microcontrollers in locomotive control units. IC Role / Device Role / Timing Role: Inverting controller using –0.8V FBX reference; SS pin programmed for 100ms soft-start to avoid inrush tripping upstream breakers. Use Value: –55°C start capability allows deployment in arctic rail yards; shutdown current <1µA prevents battery drain during multi-week storage. |
Use Scenario: 36V-to-3.3V boost converter powering MEMS accelerometers and wireless modems in mining equipment. IC Role / Device Role / Timing Role: Boost controller with SYNC pin locked to system master clock to reduce conducted EMI in noisy motor-drive environments. Use Value: 220ns minimum on-time enables stable 3.3V regulation even at 95% duty cycle; SENSE pin Kelvin routing maintains accuracy despite PCB trace resistance. |
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 | Fixed 150kHz frequency; no FBX polarity switching; supports only positive outputs; integrated gate drivers rated for 10A peak. | Best suited for fixed-frequency, single-rail boost/buck-boost where simplicity and gate drive strength outweigh flexibility. | Select LTC3891EMSE#PBF when output polarity is fixed, layout space is constrained, and higher gate drive current is required. |
| LT3748EMSE#PBF | Optocoupler-free flyback controller; no SEPIC/inverting modes; dedicated VOUT sensing; 5V–100V input; 105°C max operating temp. | Targeted specifically at isolated flyback designs where primary-side regulation eliminates optocoupler aging concerns. | Choose LT3748EMSE#PBF for cost-sensitive, isolated AC/DC or DC/DC flyback supplies without need for multi-topology support. |
Compared with LTC3891EMSE#PBF and LT3748EMSE#PBF, the LT3758MPMSE#TRA1PBF uniquely supports four topologies (boost/flyback/SEPIC/inverting) and dual-polarity feedback in one IC, enabling fewer BOM variants across diverse power architectures - especially valuable in automotive platforms requiring both positive and negative rails.
Availability
LT3758MPMSE#TRA1PBF is available at Aetrix Electronics and suitable for automotive infotainment, industrial telecom power supplies, and railway onboard battery chargers requiring stable component supply across extended temperature and high-reliability environments.
Supply support for LT3758MPMSE#TRA1PBF 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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, communications, and automotive markets.
The LT3758 product line delivers high-voltage, multi-topology DC/DC controllers designed for demanding automotive and industrial applications where input transients, wide temperature ranges, and topology flexibility are critical design constraints.
FAQ
What is the guaranteed operating temperature range for LT3758MPMSE#TRA1PBF?
The LT3758MPMSE#TRA1PBF is 100% tested and guaranteed over the full –55°C to +150°C junction temperature range. This exceeds standard AEC-Q100 Grade 1 requirements and supports under-hood deployment in extreme climates. Data sheet specifications including SENSE threshold, FBX regulation, and INTVCC dropout are validated across this entire range.
Does LT3758MPMSE#TRA1PBF support both positive and negative output voltages?
Yes, the LT3758MPMSE#TRA1PBF supports both polarities using a single FBX pin: it regulates to +1.6V for boost/flyback/SEPIC configurations and to –0.8V for inverting topologies. No external switches or configuration pins are needed - polarity is determined solely by the external feedback divider connection to VOUT.
Can LT3758MPMSE#TRA1PBF synchronize to an external clock?
Yes, the LT3758MPMSE#TRA1PBF supports frequency synchronization via the SYNC pin. When used, the RT resistor must be selected to set the free-running frequency ~20% lower than the external clock frequency. The SYNC input accepts digital logic-level signals with ≥200ns minimum pulse width and is internally disabled when FBX is near GND.
What package type and thermal performance does LT3758MPMSE#TRA1PBF use?
The LT3758MPMSE#TRA1PBF uses a 10-lead MSOP package (3mm × 3mm) with exposed pad. With proper PCB copper pour under the exposed pad, its junction-to-ambient thermal resistance (θJA) is 40°C/W - enabling reliable operation at full load in ambient temperatures up to 85°C when paired with appropriate heatsinking.
Is LT3758MPMSE#TRA1PBF AEC-Q100 qualified?
Yes, the LT3758MPMSE#TRA1PBF is AEC-Q100 qualified per Grade 1 (–40°C to +125°C ambient) and extended to –55°C to +150°C junction operation. Qualification includes stress testing for temperature cycling, humidity, mechanical shock, and ESD per AEC standards - confirming suitability for automotive safety-critical subsystems.
LT3758MPMSE#TRA1PBF 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:
- Discontinued at Digi-Key
- 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#TRA1PBF FAQ
1.How can I place an order for LT3758MPMSE#TRA1PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3758MPMSE#TRA1PBF 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#TRA1PBF reliable?
The price and inventory of LT3758MPMSE#TRA1PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3758MPMSE#TRA1PBF is usually 5 days.
3.What payment methods are accepted for LT3758MPMSE#TRA1PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3758MPMSE#TRA1PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3758MPMSE#TRA1PBF?
LT3758MPMSE#TRA1PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3758MPMSE#TRA1PBF 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#TRA1PBF?
For technical support, including LT3758MPMSE#TRA1PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3758MPMSE#TRA1PBF requirements.
6.How does Aetrix verify that LT3758MPMSE#TRA1PBF is sourced from the original manufacturer or authorized distributors?
All LT3758MPMSE#TRA1PBF 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#TRA1PBF meets industry standards.
7.What is the process for return or replacement of LT3758MPMSE#TRA1PBF?
All LT3758MPMSE#TRA1PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3758MPMSE#TRA1PBF, 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#TRA1PBF part is unused and in its original packaging.
Return procedure for LT3758MPMSE#TRA1PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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