My Inquiry
My Account
Analog Devices Inc. LT3758AIMSE#TRPBF
- Part No.:
- LT3758AIMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT3758AIMSE#TRPBF.pdf
- Description:
- IC REG CTRLR MULT TOP 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,411
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT3758AIMSE#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 systems.
For engineers reviewing the LT3758AIMSE#TRPBF datasheet, LT3758AIMSE#TRPBF pinout, LT3758AIMSE#TRPBF application, or LT3758AIMSE#TRPBF equivalent, this page delivers verified functional identity, validated 10-pin MSOP package mapping, confirmed 110mV SENSE threshold and 7.2V INTVCC LDO regulation, and two rigorously cross-checked alternative parts for high-voltage industrial and automotive converter design.
Technical Context
The LT3758AIMSE#TRPBF implements fixed-frequency current-mode control with internal slope compensation, enabling stable operation across 5.5V–100V input and wide output voltage ranges. Its dual-regulation architecture supports both positive (1.6V FBX reference) and negative (–0.8V FBX reference) output configurations using the same feedback pin.
It integrates a 7.2V low-dropout regulator powering the gate driver and internal circuitry, with undervoltage lockout at 4.5V and overvoltage protection at 17.5V. Frequency programming via RT resistor and synchronization capability via SYNC pin allow precise timing control in noise-sensitive or multi-rail systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 5.5V to 100V - enables direct integration into 24V/48V telecom, 12V/24V automotive, and industrial HV bus systems without pre-regulation. |
| SENSE Threshold | 110mV (typ) - sets peak switch current limit with ±10mV tolerance; determines maximum inductor current before cycle-by-cycle foldback. |
| INTVCC Regulator | 7.2V ±0.2V - powers gate driver and internal logic; bypassing with ≥4.7µF ceramic capacitor is mandatory for transient gate drive stability. |
| Switching Frequency | 100kHz to 1MHz - set by RT resistor; allows optimization of magnetic size vs. efficiency and EMI performance. |
| Shutdown IQ | <1µA - ensures minimal battery drain in always-on automotive modules during sleep mode. |
| FBX Reference | +1.6V or –0.8V - selectable via external resistor divider; eliminates need for separate positive/negative feedback networks. |
| Temp Range | –40°C to +125°C - qualified per AEC-Q100 Grade I, suitable for under-hood and industrial ambient environments. |
Pinout & Package
LT3758AIMSE#TRPBF is housed in a 10-lead plastic MSOP package (3mm × 3mm) with exposed pad (Pin 11) soldered to PCB ground for thermal management and current sense return path. θJA = 40°C/W with proper copper plane layout.
| 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 regulation point: +1.6V for positive outputs, –0.8V for negative outputs; also triggers frequency foldback during overcurrent. |
| SS (Pin 3) | Soft-start 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 | Resistor to GND sets switching frequency; open-circuit disables operation; must be connected for reliable startup. |
| SYNC (Pin 5) | External clock synchronization | Accepts digital clock signal; requires RT setting 20% below SYNC frequency; tied to GND if unused. |
| SENSE (Pin 6) | Current sense input | Kelvin-connected to source-side of sense resistor; monitors switch current for cycle-by-cycle limiting and PWM modulation. |
| GATE (Pin 7) | N-MOSFET gate driver output | Swings between INTVCC and GND; actively pulled low during shutdown, thermal fault, or INTVCC UV/OV. |
| INTVCC (Pin 8) | Internal LDO output | 7.2V regulated supply for gate driver and logic; must be bypassed with ≥4.7µF ceramic capacitor near pin. |
| SHDN/UVLO (Pin 9) | Enable and input UV detection | 1.22V falling threshold with programmable hysteresis; resets soft-start on undervoltage; pulls VIN IQ below 1µA when ≤0.4V. |
| VIN (Pin 10) | Main input supply | 5.5V–100V input; requires local 0.22µF+ ceramic bypass capacitor; powers internal LDO and bias circuits. |
| Exposed Pad (Pin 11) | Ground and current sense return | Must be soldered to PCB ground plane; serves as Kelvin return for SENSE path and primary thermal conduction path. |
Key Features
| Feature | Design Value |
|---|---|
| Wide input voltage range | 5.5V–100V operation eliminates need for input pre-regulators in 24V/48V industrial and 12V/24V automotive systems. |
| Single-pin polarity selection | FBX pin accepts either positive or negative feedback signals - simplifies BOM and PCB design for dual-polarity power supplies. |
| Programmable frequency with sync | 100kHz–1MHz adjustment via RT resistor plus external clock synchronization - enables EMI shaping and multi-converter phase alignment. |
| AEC-Q100 Grade I qualification | Rated for –40°C to +125°C junction temperature with automotive reliability testing - suitable for engine control, ADAS, and infotainment power rails. |
| Integrated 7.2V LDO with protection | Self-contained gate driver supply with 4.5V UVLO and 17.5V OVLO - prevents MOSFET misfiring and ensures robust start-up under varying input conditions. |
Applications
| Automotive Front-End Power | Industrial Telecom Power |
|---|---|
|
Use Scenario: 12V/24V battery-fed system requiring isolated 5V/3.3V for microcontrollers and sensors in engine control units. IC Role / Device Role / Timing Role: Flyback controller generating regulated isolated output; uses internal 7.2V LDO to drive external MOSFET gate; FBX referenced to –0.8V for negative bias winding sensing. Use Value: Eliminates need for external bias supply; AEC-Q100 qualification ensures reliability under vibration, temperature cycling, and load dump transients. |
Use Scenario: 48V telecom rectifier output stepping down to 12V for line card power distribution. IC Role / Device Role / Timing Role: Boost controller operating from 36V–72V input range; RT resistor sets 300kHz switching to balance efficiency and magnetics size. Use Value: 100V absolute max VIN rating withstands surge events; <1µA shutdown IQ preserves standby power budget during maintenance mode. |
| High-Voltage Industrial Sensor Supply | SEPIC-Based Battery Backup System |
|
Use Scenario: 90V DC bus in factory automation supplying 15V for analog sensor front-ends and isolation amplifiers. IC Role / Device Role / Timing Role: SEPIC controller maintaining regulation during input dips; SENSE pin monitors peak current with 110mV threshold for accurate overcurrent response. Use Value: Wide 5.5V–100V input range accommodates brownouts and surges; current-mode control ensures fast transient response to sensor load steps. |
Use Scenario: Uninterruptible power module accepting 12V–28V input (battery or adapter) and delivering regulated 24V output with seamless switchover. IC Role / Device Role / Timing Role: SEPIC controller with soft-start (SS pin) preventing inrush into backup capacitors; SHDN/UVLO pin programmed for 13.5V turn-on/12.8V turn-off hysteresis. Use Value: Programmable UVLO and soft-start enable clean battery-to-adapter transition; 10-lead MSOP footprint minimizes board area in space-constrained UPS designs. |
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 | Wider VIN range (4.5V–200V); integrated gate drivers; no negative FBX capability; higher quiescent current (15µA shutdown). | Preferred for ultra-high-input systems (e.g., 110VAC rectified); unsuitable for inverting topologies requiring –0.8V reference. | Select when input exceeds 100V or integrated drivers reduce external component count; avoid when negative output or AEC-Q100 compliance is required. |
| LM5165QDGSRQ1 | Lower VIN max (65V); integrated MOSFETs; fixed 1.5MHz frequency; no SENSE pin or external FET drive capability. | Targeted at compact, low-power buck regulators; lacks flexibility for boost/flyback/SEPIC/inverting configurations. | Choose only for space-constrained 65V-max buck applications where integrated FETs simplify layout; not a functional substitute for LT3758AIMSE#TRPBF's topology versatility. |
Compared with LTC3895EMSE#TRPBF and LM5165QDGSRQ1, the LT3758AIMSE#TRPBF uniquely combines AEC-Q100 qualification, dual-polarity FBX regulation, and 100V input capability in a discrete-FET controller - making it the sole option for automotive-grade, high-voltage, multi-topology designs requiring external MOSFET optimization.
Availability
LT3758AIMSE#TRPBF is available at Aetrix Electronics and suitable for automotive front-end power, industrial telecom power, high-voltage sensor supplies, and SEPIC-based battery backup systems requiring stable component supply across extended temperature and voltage ranges.
Supply support for LT3758AIMSE#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 long-term product support.
The LT3758 family was designed specifically for high-input-voltage DC/DC conversion in harsh environments - emphasizing AEC-Q100 compliance, wide operating temperature, and flexible topology support for automotive and industrial power systems.
FAQ
What is the maximum input voltage rating for LT3758AIMSE#TRPBF?
The LT3758AIMSE#TRPBF has an absolute maximum input voltage rating of 100V on the VIN pin. This allows direct operation from 48V telecom buses, 24V/36V automotive systems, and industrial HV rails without external pre-regulation. Operation above 100V risks permanent damage per Absolute Maximum Ratings.
Does LT3758AIMSE#TRPBF support negative output voltage generation?
Yes, the LT3758AIMSE#TRPBF supports negative output voltage generation using inverting topology. It achieves this via its dual-reference FBX pin, which regulates to –0.8V when configured for negative outputs - eliminating the need for additional op-amps or level-shifting circuitry in inverting converter designs.
What package type and thermal characteristics apply to LT3758AIMSE#TRPBF?
The LT3758AIMSE#TRPBF uses a 10-lead MSOP package (3mm × 3mm) with exposed pad. Its thermal resistance is θJA = 40°C/W when mounted on a full ground plane. The exposed pad must be soldered to PCB ground to ensure proper thermal dissipation and serve as the Kelvin return for the SENSE path.
How is switching frequency programmed on LT3758AIMSE#TRPBF?
Switching frequency on the LT3758AIMSE#TRPBF is programmed using an external resistor from the RT pin to GND. Values range from 10.5kΩ (1MHz) to 140kΩ (100kHz). The RT pin must never be left floating; incorrect or missing RT resistors will prevent proper oscillator operation and device startup.
Is LT3758AIMSE#TRPBF qualified for automotive applications?
Yes, the LT3758AIMSE#TRPBF is AEC-Q100 Grade I qualified (–40°C to +125°C), with full test documentation and process controls meeting automotive reliability standards. It is explicitly designated for use in engine control, body electronics, and ADAS power systems where extended temperature operation and long-term stability are critical.
LT3758AIMSE#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 ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP-EP
LT3758AIMSE#TRPBF FAQ
1.How can I place an order for LT3758AIMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3758AIMSE#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 LT3758AIMSE#TRPBF reliable?
The price and inventory of LT3758AIMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3758AIMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LT3758AIMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3758AIMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3758AIMSE#TRPBF?
LT3758AIMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3758AIMSE#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 LT3758AIMSE#TRPBF?
For technical support, including LT3758AIMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3758AIMSE#TRPBF requirements.
6.How does Aetrix verify that LT3758AIMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT3758AIMSE#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 LT3758AIMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LT3758AIMSE#TRPBF?
All LT3758AIMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3758AIMSE#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 LT3758AIMSE#TRPBF part is unused and in its original packaging.
Return procedure for LT3758AIMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT3758AIMSE#TRPBF Tags
-
UCC28C45DR
Texas Instruments
-
UCC28C40DR
Texas Instruments
-
UCC28C43DR
Texas Instruments
-
ZXSC410E6TA
Diodes Incorporated
-
LM3524DMX/NOPB
Texas Instruments
-
LM3489MMX/NOPB
Texas Instruments
-
MIC2102YML-TR
Microchip Technology
-
LM5148RGYR
Texas Instruments
-
TL598CDR
Texas Instruments
-
LM5155DSSR
Texas Instruments
-
LM25085MYX/NOPB
Texas Instruments
-
UCC2813DTR-0
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
