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Analog Devices Inc. LT8300MPS5#TRPBF
- Part No.:
- LT8300MPS5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
LT8300MPS5#TRPBF.pdf
- Description:
- IC REG FLYBACK 260MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,517
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Product details
Overview
LT8300MPS5#TRPBF from Analog Devices is a micropower isolated flyback controller IC with integrated 150V/260mA DMOS switch, operating from 6V to 100V input and delivering up to 2W isolated output power. It regulates output voltage via primary-side sampling-eliminating opto-isolators and third windings-and uses a single external resistor (RFB) for VOUT programming. Its boundary mode + low-ripple Burst Mode operation enables high efficiency across load range in automotive auxiliary power supplies.
For engineers reviewing the LT8300MPS5#TRPBF datasheet, LT8300MPS5#TRPBF pinout, LT8300MPS5#TRPBF application, or LT8300MPS5#TRPBF equivalent, key selection considerations include its –55°C to 150°C extended temperature grade, AEC-Q100 qualification, 70µA sleep-mode quiescent current, and 5-lead TSOT-23 package constraints for compact isolated DC/DC designs.
Technical Context
The LT8300MPS5#TRPBF implements primary-side regulation using flyback pulse sensing: it samples the reflected output voltage at the SW pin when secondary current reaches zero, enabling accurate regulation without optocouplers or auxiliary windings. Its internal sample-and-hold error amplifier compares this sampled voltage against a 1.223V bandgap reference, with RFB current trimmed to 100µA ±2%.
It operates in boundary conduction mode under heavy load (variable frequency, variable peak-current), transitions to discontinuous conduction mode as load lightens (clamped max fSW ≤ 750kHz), and enters low-ripple Burst Mode at very light loads-switching between active (330µA IQ) and sleep (70µA IQ) modes while maintaining <0.5% minimum load requirement.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6V to 100V - supports wide-input industrial and automotive battery rails including 24V, 36V, 48V, and 72V systems. |
| Integrated Switch | 150V/260mA DMOS - eliminates external high-voltage switch; rated for 150V transients on SW pin. |
| Quiescent Current | 70µA in Sleep Mode - enables ultra-low standby power for always-on automotive housekeeping supplies. |
| Output Regulation | VOUT set by single RFB resistor - no opto-isolator or third winding required; simplifies transformer design and reduces BOM count. |
| Operating Temperature | –55°C to 150°C junction - qualified per AEC-Q100 Grade MP, suitable for under-hood and engine-control applications. |
| Switching Frequency | 6kHz to 750kHz - boundary mode at full load ensures small magnetics; frequency clamping prevents excessive gate loss at light load. |
| Minimum Load | <0.5% of full output - enables stable regulation down to ~1mA for 5V/2W design, critical for low-power sensor interfaces. |
Pinout & Package
LT8300MPS5#TRPBF is housed in a 5-lead plastic TSOT-23 package (S5), with 1.6mm × 2.9mm footprint and 0.95mm height. The package is RoHS-compliant, lead-free, and optimized for thermal dissipation in high-density layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN/UVLO (Pin 1) | Enable / Undervoltage Lockout Input | Accurate 1.223V threshold with 2.5µA hysteresis current; enables VIN UVLO programming or direct enable control. |
| GND (Pin 2) | Power Ground Reference | Primary ground return for internal regulators and feedback circuitry; must connect directly to local ground plane. |
| RFB (Pin 3) | Feedback Resistor Terminal | Sinks 100µA regulated current; connects to SW node via external RFB to set VOUT = 100µA × RFB / NPS − VF. |
| SW (Pin 4) | Switch Drain Node | Drain of internal 150V DMOS switch; carries high dv/dt flyback pulses - requires minimized trace area for EMI control. |
| VIN (Pin 5) | Main Input Supply | Supplies internal bias circuitry and serves as reference for RFB feedback path; requires local 1µF+ ceramic bypass capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Primary-side regulation | Eliminates opto-isolator and third winding - reduces component count, cost, and board space while improving long-term reliability. |
| Boundary + Burst Mode operation | Maintains >85% efficiency from 1mA to 300mA load at 5V output - avoids subharmonic oscillation and minimizes output ripple at light loads. |
| Internal compensation & soft-start | Reduces external components to only RFB, transformer, input/output caps, and diode - soft-start timer fixed at 2.7ms. |
| AEC-Q100 Grade MP qualification | Validated for –55°C to 150°C operation with enhanced reliability testing - meets functional safety requirements for automotive subsystems. |
| Low minimum load requirement | <0.5% full-load current - enables stable regulation in partial-load scenarios such as CAN/LIN transceiver bias or microcontroller wake-up circuits. |
Applications
| Automotive Auxiliary Power | Industrial Isolated Sensors |
|---|---|
Use Scenario: Providing isolated 5V/200mA bias for engine control unit (ECU) CAN transceivers and analog front-ends in 12V–48V vehicle architectures. IC Role / Device Role / Timing Role: Primary-side flyback controller regulating isolated output without optocoupler, using transformer turns ratio and RFB to maintain tight VOUT under battery voltage transients. Use Value: Enables compact, AEC-Q100-compliant auxiliary supply with <70µA shutdown IQ - extends battery life during vehicle sleep mode. |
Use Scenario: Generating isolated 3.3V/100mA power for RS-485 transceivers and precision ADCs in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Micropower flyback controller delivering stable isolated rail across 6V–100V input range, immune to common-mode noise on long field wiring. Use Value: Eliminates need for external isolation components - reduces BOM cost by ≥30% versus opto-coupled solutions while meeting IEC 61000-4 immunity standards. |
| Medical Patient Monitoring | Telecom Housekeeping Supply |
Use Scenario: Supplying isolated 5V/150mA for patient-connected ECG front-end amplifiers and microcontrollers in Class II medical devices. IC Role / Device Role / Timing Role: Safety-isolated DC/DC controller meeting 1.5kV reinforced insulation requirements via certified transformers (e.g., Wurth 750312557). Use Value: Achieves <±5% output regulation across –40°C to +85°C ambient - supports clinical-grade accuracy without secondary-side feedback compensation. |
Use Scenario: Delivering isolated 12V/100mA for FPGA configuration and PHY management in telecom line cards with 48V backplane input. IC Role / Device Role / Timing Role: High-input-voltage flyback controller supporting 36V–72V telecom range with programmable UVLO and precise load regulation. Use Value: Maintains >82% efficiency at 10% load via low-ripple Burst Mode - avoids audible noise and EMI issues common in traditional burst-mode converters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated flyback controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT3748EMSE#TRPBF | Requires external MOSFET; supports up to 400V input; no integrated switch; higher external component count. | Better suited for >2W outputs or >150V input; lacks micropower sleep mode (IQ = 1.2mA typical). | Select when higher output power (>3W) or wider input range (>100V) is required; not drop-in compatible due to different pinout and control architecture. |
| UCC28740DR | Texas Instruments part; integrated 700V MOSFET; uses valley-switching quasi-resonant control; higher BOM cost. | Targeted at universal AC input (85–265VAC); not rated for automotive temperature or AEC-Q100. | Prefer for offline AC/DC adapters; avoid for automotive or extended-temp DC/DC where LT8300MPS5#TRPBF's –55°C rating and AEC-Q100 compliance are mandatory. |
Compared with LT3748EMSE#TRPBF and UCC28740DR, the LT8300MPS5#TRPBF offers the only combination of integrated 150V switch, 70µA sleep IQ, AEC-Q100 MP grade, and primary-side regulation in a 5-lead TSOT-23 - making it uniquely suited for space-constrained, low-power automotive and industrial isolated supplies.
Availability
LT8300MPS5#TRPBF is available at Aetrix Electronics and suitable for automotive auxiliary power, industrial sensor isolation, medical monitoring, and telecom housekeeping supplies requiring stable component supply across extended temperature and long product lifecycles.
Supply support for LT8300MPS5#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 (now part of Analog Devices, Inc. following merger with Maxim Integrated) is a global leader in high-performance analog, mixed-signal, and power management semiconductors.
The LT8300 product line delivers micropower isolated flyback controllers for automotive, industrial, and medical applications where compact size, low IQ, and AEC-Q100 compliance are essential - designed specifically to replace opto-coupled solutions with primary-side regulation.
FAQ
What is the maximum output power achievable with LT8300MPS5#TRPBF?
The LT8300MPS5#TRPBF delivers up to 2W of isolated output power, depending on input voltage, transformer turns ratio, and output voltage. For example, with a 6:1 transformer and 36V–72V input, it achieves 1.87W at 36V and 2.44W at 72V for a 5V output. Output power is limited by the 260mA switch current and 150V SW pin rating - exceeding either violates absolute maximum ratings.
Does LT8300MPS5#TRPBF require an optocoupler or third winding for regulation?
No, the LT8300MPS5#TRPBF does not require an optocoupler or third winding. It samples the isolated output voltage directly from the primary-side flyback waveform at the SW pin when secondary current reaches zero. This primary-side sensing method eliminates external isolation components while maintaining ±5% output regulation across load and temperature.
What is the significance of the "MP" grade in LT8300MPS5#TRPBF?
The "MP" suffix denotes the military/aerospace and extended automotive temperature grade: –55°C to 150°C operating junction temperature, with AEC-Q100 qualification. This grade ensures reliability under extreme thermal stress, such as under-hood automotive environments or industrial enclosures without active cooling - distinct from commercial (E), industrial (I), or high-temp (H) variants.
How is output voltage programmed on LT8300MPS5#TRPBF?
Output voltage is set using a single external resistor (RFB) connected between the RFB pin and the SW node. The LT8300MPS5#TRPBF sinks a precise 100µA current into RFB, and VOUT ≈ (100µA × RFB / NPS) − VF, where NPS is the transformer primary-to-secondary turns ratio and VF is the output diode forward voltage (~0.3V). Final RFB value is fine-tuned based on measured VOUT(MEAS).
Can LT8300MPS5#TRPBF operate with input voltages below 6V?
No, the LT8300MPS5#TRPBF has a specified minimum input voltage of 6V per its Absolute Maximum Ratings and Electrical Characteristics tables. Operation below 6V is not guaranteed - the internal regulators and gate drive circuitry require sufficient headroom to function correctly. Attempting sub-6V operation may result in startup failure, erratic switching, or undefined regulation behavior.
LT8300MPS5#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive or Negative, Isolation Capable
- Topology:
- Flyback
- Output Type:
- -
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 6V
- Voltage - Input (Max):
- 100V
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- 260mA
- Frequency - Switching:
- 7.5kHz ~ 750kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-5
LT8300MPS5#TRPBF FAQ
1.How can I place an order for LT8300MPS5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8300MPS5#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 LT8300MPS5#TRPBF reliable?
The price and inventory of LT8300MPS5#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8300MPS5#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8300MPS5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8300MPS5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8300MPS5#TRPBF?
LT8300MPS5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8300MPS5#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 LT8300MPS5#TRPBF?
For technical support, including LT8300MPS5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8300MPS5#TRPBF requirements.
6.How does Aetrix verify that LT8300MPS5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8300MPS5#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 LT8300MPS5#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8300MPS5#TRPBF?
All LT8300MPS5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8300MPS5#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 LT8300MPS5#TRPBF part is unused and in its original packaging.
Return procedure for LT8300MPS5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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