My Inquiry
My Account
Analog Devices Inc. LT3758EMSE#PBF
- Part No.:
- LT3758EMSE#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT3758EMSE#PBF.pdf
- Description:
- IC REG CTRLR MULT TOP 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,276
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT3758EMSE#PBF 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 delivers 100kHz–1MHz programmable switching frequency, <1µA shutdown current, and internal 7.2V LDO for gate drive-used in automotive 12V–48V telecom power supplies.
For engineers reviewing the LT3758EMSE#PBF datasheet, LT3758EMSE#PBF pinout, LT3758EMSE#PBF application, or LT3758EMSE#PBF equivalent, key selection criteria include input voltage range compatibility, negative/positive output configurability, SENSE threshold accuracy (110mV typ), INTVCC LDO regulation (7.2V), and MSOP-10 thermal performance (θJA = 40°C/W).
Technical Context
The LT3758EMSE#PBF implements fixed-frequency current-mode control with slope compensation, enabling stable operation across 5.5V–100V input and variable output configurations. Its dual-reference feedback architecture supports ±0.8V/1.6V FBX thresholds for positive or negative output regulation without external polarity switches.
It integrates a 7.2V LDO (4.5V UVLO, 17.5V OVLO), programmable SHDN/UVLO hysteresis via external resistors, and frequency foldback during overcurrent. The SYNC pin enables external clock synchronization when RT is set 20% below sync frequency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 5.5V to 100V - supports direct connection to automotive battery, telecom -48V, or industrial HV rails without pre-regulation. |
| Switching Frequency | 100kHz to 1MHz - set by RT resistor; enables trade-off between efficiency (lower f) and magnetics size (higher f). |
| SENSE Threshold | 110mV (typ) - defines peak switch current limit; determines MOSFET RDS(on) and sense resistor sizing. |
| FBX Regulation | +1.6V or −0.8V - selectable via external divider; enables single-pin programming of positive/negative output polarity. |
| INTVCC LDO | 7.2V ±0.2V - powers gate driver and internal logic; bypassed with ≥4.7µF ceramic capacitor at pin. |
| Shutdown IQ | <1µA - enables long-term battery backup in automotive infotainment or telematics modules. |
| Package Thermal θJA | 40°C/W - measured for MSOP-10 with exposed pad soldered to PCB ground plane. |
Pinout & Package
LT3758EMSE#PBF 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 (1) | Error amplifier compensation node | Connects external RC network to stabilize voltage loop; clamped during soft-start. |
| FBX (2) | Positive/negative feedback input | Sets output regulation point: +1.6V for positive outputs, −0.8V for negative outputs. |
| SS (3) | Soft-start timing control | 10µA pull-up to 2.5V rail; external capacitor sets ramp time; reset on UV/OV/thermal fault. |
| RT (4) | Frequency programming input | Resistor to GND sets switching frequency; open-circuit disables operation. |
| SYNC (5) | External clock synchronization input | Accepts digital clock; requires RT set 20% below sync frequency; tied to GND if unused. |
| SENSE (6) | Current sense input | Kelvin-connected to source-side of sense resistor; compares against 110mV threshold for cycle-by-cycle limiting. |
| GATE (7) | N-channel MOSFET gate driver output | Swings between INTVCC and GND; driven low during shutdown, thermal lockout, or INTVCC fault. |
| INTVCC (8) | Internal LDO output | 7.2V regulated supply for gate driver and logic; bypass with ≥4.7µF ceramic cap; can be externally powered above 7.5V. |
| SHDN/UVLO (9) | Enable/disable and input UVLO input | 1.22V falling threshold with programmable hysteresis; <0.4V forces shutdown and <1µA IQ. |
| VIN (10) | Main input supply | 5.5V–100V input; bypass with ≥0.22µF ceramic cap adjacent to pin. |
| Exposed Pad (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 VIN range support | Operates directly from 5.5V–100V inputs-eliminates need for pre-regulators in 24V/48V industrial or 12V–60V automotive systems. |
| Single-pin output polarity selection | FBX pin accepts either positive or negative feedback divider-reduces BOM count and layout complexity vs dual-reference controllers. |
| Programmable frequency & sync | RT resistor sets 100kHz–1MHz range; SYNC pin enables deterministic timing in multi-rail systems without jitter accumulation. |
| Low-power shutdown mode | <1µA VIN quiescent current-enables always-on monitoring circuits in battery-backed automotive ECUs or IoT edge nodes. |
| Integrated LDO with fault protection | 7.2V INTVCC regulator includes 4.5V UVLO and 17.5V OVLO-prevents MOSFET gate underdrive or overvoltage damage during transients. |
Applications
| Automotive Infotainment Power | Industrial Telecom Rectifier |
|---|---|
Use Scenario: Generating isolated ±12V rails from 12V vehicle battery for audio amplifiers and display controllers. IC Role / Device Role / Timing Role: Flyback controller regulating negative output via FBX = −0.8V reference; synchronized to system clock via SYNC pin. Use Value: Eliminates separate negative-bias IC; achieves <1µA shutdown current for parking-mode compliance. | Use Scenario: Converting −48V telecom supply to +24V intermediate bus for optical module drivers. IC Role / Device Role / Timing Role: Inverting controller with FBX = −0.8V reference; operates at 300kHz (RT = 41.2kΩ) for optimal efficiency/size balance. Use Value: Supports direct −48V input without pre-regulation; INTVCC LDO ensures stable gate drive despite input ripple. |
| Wide-Input Industrial Sensor Hub | High-Voltage LED Driver |
Use Scenario: Powering 3.3V/5V microcontrollers and analog front-ends from unregulated 24V–72V factory floor supplies. IC Role / Device Role / Timing Role: SEPIC controller with FBX = +1.6V reference; uses frequency foldback during cold-start inrush limiting. Use Value: Maintains regulation during brownouts; SENSE threshold accuracy enables precise current limiting for sensor signal integrity. | Use Scenario: Driving high-brightness LED strings from 36V–100V industrial lighting buses. IC Role / Device Role / Timing Role: Boost controller with FBX = +1.6V reference; operates at 500kHz (RT = 24.3kΩ) to minimize EMI filter size. Use Value: Wide VIN range accommodates dimming-induced bus fluctuations; 110mV SENSE threshold allows low-loss current sensing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DC/DC controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT3758AEMSE#PBF | Improved load transient response; identical pinout, specs, and package. | Better dynamic regulation in fast-changing loads (e.g., burst-mode LED drivers). | Select LT3758AEMSE#PBF when output voltage stability under rapid load steps is critical. |
| LT3757EMSE#PBF | Lacks negative-output capability; FBX only supports +1.6V reference; no −0.8V option. | Restricted to positive-output topologies only (boost/flyback/SEPIC); not usable for inverting designs. | Choose LT3757EMSE#PBF only when negative output is unnecessary and cost reduction is prioritized. |
Compared with LT3758EMSE#PBF, LT3758AEMSE#PBF offers tighter load regulation during transients but shares identical pinout and operating envelope, while LT3757EMSE#PBF sacrifices polarity flexibility to reduce feature count-making it unsuitable for inverting applications requiring FBX = −0.8V.
Availability
LT3758EMSE#PBF is available at Aetrix Electronics and suitable for automotive infotainment, industrial telecom rectification, and wide-input sensor hub power conversion requiring stable component supply across extended temperature ranges.
Supply support for LT3758EMSE#PBF 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 precision instrumentation, communications, and industrial markets.
The LT3758 product line delivers high-voltage, current-mode DC/DC controllers optimized for rugged, wide-input applications in automotive, telecom, and industrial power systems-designed for reliability under harsh voltage and thermal conditions.
FAQ
What is the maximum input voltage rating for LT3758EMSE#PBF?
The absolute maximum input voltage (VIN) for LT3758EMSE#PBF is 100V, with continuous operation specified from 5.5V to 100V. Exceeding 100V risks permanent damage per Absolute Maximum Ratings. This rating enables direct interface with 48V telecom, 72V industrial, and 60V automotive systems without external clamping or pre-regulation stages. LT3758EMSE#PBF maintains full functionality across this range when properly decoupled and thermally managed.
How does LT3758EMSE#PBF support both positive and negative output voltages?
LT3758EMSE#PBF supports both polarities through its dual-reference FBX pin: +1.6V for positive outputs (e.g., boost, SEPIC) and −0.8V for negative outputs (e.g., inverting topology). The feedback divider connects accordingly-pulling FBX to +1.6V or −0.8V sets regulation target without external switches or extra pins. This eliminates discrete polarity-selection circuitry and reduces design complexity. LT3758EMSE#PBF's internal comparators A1 and A2 automatically activate based on FBX voltage level.
What is the purpose of the exposed pad on LT3758EMSE#PBF?
The exposed pad (Pin 11) on LT3758EMSE#PBF serves as both thermal dissipation path and electrical ground return. It must be soldered to a PCB ground plane to achieve the specified θJA of 40°C/W and ensure reliable operation at full load. The pad also functions as the negative terminal for the current sense resistor, enabling Kelvin sensing. Failure to solder the pad degrades thermal performance and compromises current-sense accuracy. LT3758EMSE#PBF's datasheet mandates full pad soldering for production use.
Can LT3758EMSE#PBF synchronize to an external clock, and what are the requirements?
Yes, LT3758EMSE#PBF supports external clock synchronization via the SYNC pin. To enable this, the RT resistor must be selected to program a switching frequency 20% lower than the external clock frequency. The SYNC signal must be a clean digital waveform with minimum pulse width of 200ns. If synchronization is unused, SYNC must be tied to GND. LT3758EMSE#PBF ignores SYNC when FBX is near GND (e.g., during start-up or fault), ensuring robust behavior. This feature is used in noise-sensitive multi-converter systems to avoid beat frequencies.
What is the typical SENSE current limit threshold for LT3758EMSE#PBF, and how is it used?
The typical SENSE current limit threshold for LT3758EMSE#PBF is 110mV, with guaranteed range of 100mV–120mV across temperature. This voltage is compared against the sensed voltage across the external current-sense resistor to enforce cycle-by-cycle peak current limiting. Designers select the sense resistor value (RSENSE) using RSENSE = 0.11V / IPEAK to set desired switch current limit. LT3758EMSE#PBF uses this threshold for both normal regulation and overcurrent protection, triggering immediate MOSFET turn-off if exceeded.
LT3758EMSE#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tube
- 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
LT3758EMSE#PBF FAQ
1.How can I place an order for LT3758EMSE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3758EMSE#PBF 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 LT3758EMSE#PBF reliable?
The price and inventory of LT3758EMSE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3758EMSE#PBF is usually 5 days.
3.What payment methods are accepted for LT3758EMSE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3758EMSE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3758EMSE#PBF?
LT3758EMSE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3758EMSE#PBF 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 LT3758EMSE#PBF?
For technical support, including LT3758EMSE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3758EMSE#PBF requirements.
6.How does Aetrix verify that LT3758EMSE#PBF is sourced from the original manufacturer or authorized distributors?
All LT3758EMSE#PBF 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 LT3758EMSE#PBF meets industry standards.
7.What is the process for return or replacement of LT3758EMSE#PBF?
All LT3758EMSE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3758EMSE#PBF, 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 LT3758EMSE#PBF part is unused and in its original packaging.
Return procedure for LT3758EMSE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT3758EMSE#PBF 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…
