My Inquiry
My Account
Analog Devices Inc. LT3758AHMSE#TRPBF
- Part No.:
- LT3758AHMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT3758AHMSE#TRPBF.pdf
- Description:
- IC REG CTRLR MULT TOP 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,108
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT3758AHMSE#TRPBF from Analog Devices is a wide-input, current-mode DC/DC controller for boost, flyback, SEPIC, and inverting topologies. It supports 5.5V to 100V input, generates positive or negative regulated outputs via single FBX pin, features 100kHz–1MHz programmable switching frequency, internal 7.2V LDO, and AEC-Q100 qualification for automotive power systems.
For engineers reviewing the LT3758AHMSE#TRPBF datasheet, LT3758AHMSE#TRPBF pinout, LT3758AHMSE#TRPBF application, or LT3758AHMSE#TRPBF equivalent, this page delivers verified functional identity, thermal-grade package mapping (–40°C to 150°C), confirmed pin roles, real-world transient response data, and validated alternative options for high-voltage industrial and automotive converter designs.
Technical Context
The LT3758AHMSE#TRPBF implements fixed-frequency current-mode control with slope compensation, enabling stable regulation across wide VIN and VOUT ranges. Its dual-reference error amplifier (1.6V for positive output, –0.8V for negative output) and FBX-based frequency foldback during overcurrent ensure robust startup and fault recovery.
It integrates a 7.2V low-dropout regulator (4.5V UVLO, 17.5V OVLO) powering the gate driver and internal logic, with INTVCC current limiting that scales inversely with VIN to prevent thermal runaway. The device supports external synchronization with 20% slower RT-programmed frequency and includes programmable soft-start via SS pin with 10µA pull-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 5.5V to 100V - enables direct battery stack or industrial bus interface without pre-regulation |
| Switching Frequency | 100kHz to 1MHz - set by RT resistor; allows optimization of efficiency vs. magnetics size |
| SENSE Threshold | 110mV typical - defines peak switch current limit with ±10mV temp drift over –40°C to 150°C |
| FBX Regulation | +1.6V / –0.8V - single-pin dual-polarity feedback reference for flexible output polarity design |
| INTVCC Regulator | 7.2V ±0.2V - powers gate driver and internal circuitry; bypassed with ≥4.7µF ceramic capacitor |
| Shutdown IQ | <1µA - enables long-term battery operation in always-on vehicle subsystems |
| Operating Temp | –40°C to +150°C - qualified per AEC-Q100 Grade H for under-hood automotive applications |
Pinout & Package
LT3758AHMSE#TRPBF uses a 10-lead MSOP package (3mm × 3mm) with exposed pad (Pin 11 = GND), rated for TJMAX = 150°C and θJA = 40°C/W. The exposed pad must be soldered to PCB ground 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 |
| FBX (Pin 2) | Positive/negative feedback input | Sets output regulation point at +1.6V or –0.8V; modulates frequency during faults |
| SS (Pin 3) | Soft-start timing control | 10µA pull-up to 2.5V rail; external capacitor sets ramp time; resets on UV/OV/thermal events |
| RT (Pin 4) | Frequency programming input | Resistor-to-GND sets switching frequency; open-circuit disables operation |
| SYNC (Pin 5) | External clock synchronization input | Accepts digital clock; requires RT setting 20% below SYNC frequency |
| SENSE (Pin 6) | Current sense comparator input | Kelvin-connected to MOSFET source resistor; triggers immediate shutdown above 110mV |
| GATE (Pin 7) | N-channel MOSFET gate driver output | Swings between INTVCC and GND; forced low during shutdown or INTVCC fault |
| INTVCC (Pin 8) | Internal LDO output | 7.2V supply for gate driver and logic; must be bypassed with ≥4.7µF ceramic cap |
| SHDN/UVLO (Pin 9) | Enable and input undervoltage detection | 1.22V falling threshold with programmable hysteresis; pulls VIN IQ to <1µA when ≤0.4V |
| VIN (Pin 10) | Main input supply | Bypassed locally with ≥0.22µF ceramic cap; powers internal LDO and bias circuits |
Key Features
| Feature | Design Value |
|---|---|
| Wide input range operation | 5.5V–100V input supports 12V/24V/48V battery systems and industrial 72V buses without pre-buck |
| Dual-polarity feedback architecture | Single FBX pin supports both +1.6V and –0.8V references-eliminates need for separate polarity-select pins |
| Programmable frequency with sync | RT resistor sets 100kHz–1MHz range; SYNC pin enables multi-converter phase alignment in distributed power systems |
| AEC-Q100 Grade H qualification | Validated for –40°C to +150°C junction operation-meets automotive under-hood thermal requirements |
| Integrated LDO with protection | 7.2V regulator includes 4.5V UVLO, 17.5V OVLO, and VIN-scaled current limiting to prevent thermal failure |
Applications
| Automotive Front-End Power Supply | Industrial Telecom Rectifier |
|---|---|
Use Scenario: 24V–72V truck battery input powering 12V infotainment and ADAS modules with reverse-polarity protection. IC Role / Device Role / Timing Role: Flyback controller generating isolated 12V output; uses FBX polarity selection and frequency foldback during cold-crank transients. Use Value: AEC-Q100 Grade H rating ensures reliability at 150°C junction; 100V abs max VIN withstands load-dump spikes up to 87V. | Use Scenario: 48V telecom rectifier feeding -48V backplane with high-efficiency hold-up capability. IC Role / Device Role / Timing Role: Inverting controller generating regulated -48V output; leverages dual-reference FBX and current-mode stability across line/load steps. Use Value: 110mV SENSE threshold enables precise current limiting for telecom fuse coordination; <1µA shutdown IQ extends backup runtime. |
| High-Voltage Industrial Sensor Hub | Wide-Range SEPIC for Smart Grid Meters |
Use Scenario: 12–100V DC input from solar array or grid-tied PV string powering isolated sensor interfaces and RF modems. IC Role / Device Role / Timing Role: SEPIC controller delivering 5V/3.3V outputs; uses RT-programmed 500kHz frequency to minimize inductor size in space-constrained enclosures. Use Value: 100V absolute max VIN eliminates need for external TVS; programmable SHDN/UVLO enables brown-out rejection at 15V. | Use Scenario: Smart electricity meter with fluctuating 24–60V auxiliary supply requiring stable 3.3V MCU rail despite input ripple and surges. IC Role / Device Role / Timing Role: Non-isolated SEPIC controller with soft-start and frequency foldback; maintains regulation during 10ms 100V surge events. Use Value: Internal 7.2V LDO powers gate driver directly-no external bias supply needed; exposed-pad MSOP aids thermal management in sealed meter housing. |
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 |
|---|---|---|---|
| LT3758HMSE#TRPBF | Same pinout, identical specs, but non-A grade (no AEC-Q100 qualification); 150°C max junction same as LT3758AHMSE#TRPBF | Lacks automotive qualification documentation and test reports; suitable only for industrial use | Select LT3758HMSE#TRPBF if AEC-Q100 compliance is not required and cost sensitivity outweighs qualification needs |
| LT3758AIMSE#TRPBF | Same functionality and pinout; rated for –40°C to +125°C (Grade I) instead of +150°C; lower thermal margin | Not qualified for under-hood automotive environments; limited to cabin or industrial ambient conditions | Choose LT3758AIMSE#TRPBF only for non-automotive applications where ambient temperature stays below 85°C |
Compared with LT3758HMSE#TRPBF and LT3758AIMSE#TRPBF, the LT3758AHMSE#TRPBF uniquely provides full AEC-Q100 Grade H qualification and guaranteed 150°C operation-critical for engine compartment power supplies where thermal derating and long-term reliability are mandatory.
Availability
LT3758AHMSE#TRPBF is available at Aetrix Electronics and suitable for automotive front-end converters, industrial telecom rectifiers, high-voltage sensor hubs, and smart grid metering systems requiring stable component supply across extended temperature and voltage ranges.
Supply support for LT3758AHMSE#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 precision instrumentation, industrial automation, and automotive safety markets.
The LT3758A product line delivers high-voltage, current-mode controllers optimized for ruggedized power conversion in automotive, telecom, and industrial equipment-designed specifically for reliability under extreme input transients and thermal stress.
FAQ
What is the maximum junction temperature rating for LT3758AHMSE#TRPBF?
The LT3758AHMSE#TRPBF is rated for a maximum junction temperature of +150°C and is fully qualified per AEC-Q100 Grade H. This specification is guaranteed over the full –40°C to +150°C operating junction temperature range, with thermal resistance θJA = 40°C/W in the MSOP package when the exposed pad is properly soldered to PCB ground.
Does LT3758AHMSE#TRPBF support both positive and negative output voltages?
Yes, the LT3758AHMSE#TRPBF supports both polarities using a single FBX pin: it regulates to +1.6V for positive outputs (boost/flyback/SEPIC) and to –0.8V for negative outputs (inverting topology). The internal error amplifier automatically selects the appropriate reference based on FBX voltage polarity-no external configuration pins are required.
How is the switching frequency programmed on LT3758AHMSE#TRPBF?
The switching frequency of LT3758AHMSE#TRPBF is set using an external resistor (RT) connected from Pin 4 (RT) to GND. Values from 10.5kΩ (1MHz) to 140kΩ (100kHz) are supported per the datasheet table. Leaving RT open disables operation; the RT pin must never float. For synchronization, the RT resistor should be selected for a frequency 20% slower than the external SYNC clock.
What is the purpose of the SHDN/UVLO pin on LT3758AHMSE#TRPBF?
The SHDN/UVLO pin (Pin 9) serves dual functions: it enables/disables the controller (logic-level shutdown when ≤0.4V) and monitors input voltage via a precise 1.22V falling threshold with externally programmable hysteresis. When VIN drops below the programmed turn-off threshold, the IC enters shutdown with <1µA quiescent current and resets soft-start.
Can LT3758AHMSE#TRPBF drive high-gate-charge MOSFETs at high frequencies?
The LT3758AHMSE#TRPBF gate driver is rated for typical 22ns rise/fall times into 3300pF, but its ability to drive high-QG MOSFETs depends on VIN and frequency due to internal LDO current limiting. As VIN increases, available INTVCC drive current decreases-see Figure 2 in the datasheet. At 100V VIN and 500kHz, maximum recommended QG is ~30nC to maintain >4.7V INTVCC.
LT3758AHMSE#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 ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP-EP
LT3758AHMSE#TRPBF FAQ
1.How can I place an order for LT3758AHMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3758AHMSE#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 LT3758AHMSE#TRPBF reliable?
The price and inventory of LT3758AHMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3758AHMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LT3758AHMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3758AHMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3758AHMSE#TRPBF?
LT3758AHMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3758AHMSE#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 LT3758AHMSE#TRPBF?
For technical support, including LT3758AHMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3758AHMSE#TRPBF requirements.
6.How does Aetrix verify that LT3758AHMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT3758AHMSE#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 LT3758AHMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LT3758AHMSE#TRPBF?
All LT3758AHMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3758AHMSE#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 LT3758AHMSE#TRPBF part is unused and in its original packaging.
Return procedure for LT3758AHMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT3758AHMSE#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…
