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Analog Devices Inc. LT8300MPS5#TRMPBF
- Part No.:
- LT8300MPS5#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
LT8300MPS5#TRMPBF.pdf
- Description:
- IC REG FLYBACK 260MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,260
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Product details
Overview
LT8300MPS5#TRMPBF 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 in boundary or low-ripple Burst Mode. It regulates output voltage via primary-side sampling-eliminating opto-isolators and third windings-and uses a single external resistor (RFB) for VOUT programming. Designed for automotive-grade auxiliary power in harsh environments, it supports –55°C to 150°C junction temperature.
For engineers reviewing the LT8300MPS5#TRMPBF datasheet, LT8300MPS5#TRMPBF pinout, LT8300MPS5#TRMPBF application, or LT8300MPS5#TRMPBF equivalent, key selection criteria include its AEC-Q100 qualification, 70µA sleep-mode quiescent current, 150V SW pin rating, boundary-mode operation for tight load regulation, and TSOT-23-5 package compatibility with space-constrained isolated DC/DC designs.
Technical Context
The LT8300MPS5#TRMPBF implements primary-side sensing using flyback pulse amplitude on the SW pin, enabling regulation without secondary-side feedback components. Its sample-and-hold error amplifier captures voltage when secondary current reaches zero-ensuring accurate sampling in both boundary and discontinuous conduction modes.
It integrates internal compensation, soft-start, and dual-mode control logic: boundary mode at heavy loads (variable frequency, zero-current switching) and low-ripple Burst Mode® at light loads (7.5kHz min frequency, 70µA IQ). The EN/UVLO pin provides programmable undervoltage lockout with 1.223V threshold and 2.5µA hysteresis current for stable enable/disable behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6V to 100V - supports wide-input industrial, telecom, and automotive battery rails including 24V, 36V, 48V, and 72V systems. |
| Integrated Switch | 150V/260mA DMOS - enables direct high-voltage primary-side switching without external FET; SW pin rated to 150V transient. |
| Quiescent Current | 70µA in Sleep Mode - minimizes standby power loss in always-on auxiliary supplies. |
| Output Regulation | VOUT set by single RFB resistor - eliminates opto-isolator and third winding; accuracy depends on RFB tolerance and transformer turns ratio. |
| Operating Modes | Boundary Mode (heavy load) + Low-Ripple Burst Mode® (light load) - ensures high efficiency (>85%) across full load range while limiting output ripple. |
| Junction Temp Range | –55°C to 150°C - qualified per AEC-Q100 Grade MP, suitable for under-hood automotive and extended-temperature industrial applications. |
| Package | 5-Lead TSOT-23 - compact footprint (2.9mm × 1.6mm) with exposed pad for thermal performance in high-density layouts. |
Pinout & Package
LT8300MPS5#TRMPBF is housed in a 5-lead plastic TSOT-23 package (S5), with exposed thermal pad for enhanced heat dissipation. Pin 1 is EN/UVLO, Pin 2 is GND, Pin 3 is RFB, Pin 4 is SW (drain of internal DMOS), and Pin 5 is VIN. The package meets JEDEC MO-178AC standard and supports reflow soldering per IPC/JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN/UVLO (Pin 1) | Enable and input undervoltage lockout input | Shuts down device below 0.3V; 1.223V threshold allows precise VIN UVLO programming with resistor divider; 2.5µA hysteresis current enables stable turn-on/turn-off transitions. |
| GND (Pin 2) | Power and signal reference ground | Must connect directly to local ground plane; serves as return path for internal regulators and feedback circuitry. |
| RFB (Pin 3) | Feedback current input for output voltage sensing | Accepts 100µA regulation current; voltage across external RFB sets VOUT via VOUT = (100µA × RFB)/NPS − VF; sensitive to layout parasitics-minimize trace area. |
| SW (Pin 4) | Drain of internal 150V/260mA DMOS switch | Connects to transformer primary; experiences high dv/dt during switching-requires short, low-inductance routing to reduce EMI and voltage spikes. |
| VIN (Pin 5) | Main input supply and reference for RFB circuitry | Supplies internal bias; must be locally bypassed with ceramic capacitor; also serves as reference for RFB feedback network. |
Key Features
| Feature | Design Value |
|---|---|
| Primary-side regulation | Eliminates opto-isolator and third winding-reduces BOM count, cost, and board area while avoiding opto aging and nonlinearity issues. |
| Boundary conduction mode | Enables zero-current switching each cycle-improves load regulation, allows smaller magnetics, and avoids subharmonic oscillation. |
| Low-ripple Burst Mode® | Maintains <1% output ripple at light loads while achieving >75% efficiency at 1mA output-critical for noise-sensitive analog and sensor circuits. |
| Internal compensation & soft-start | Reduces external component count by integrating loop compensation and 2.7ms soft-start timer-simplifies design and improves startup reliability. |
| AEC-Q100 Grade MP qualification | Validated for –55°C to 150°C operation with enhanced reliability testing-meets functional safety requirements for automotive auxiliary power systems. |
Applications
| Automotive Auxiliary Power | Industrial Isolated Housekeeping Supply |
|---|---|
Use Scenario: Providing isolated 5V/300mA bias for CAN transceivers, microcontrollers, and sensors in engine control units (ECUs) and ADAS modules. IC Role / Device Role / Timing Role: Primary-side flyback controller managing isolated DC/DC conversion from 12V–48V battery rail to regulated 5V output. Use Value: Enables compact, AEC-Q100-compliant auxiliary supply without opto-isolators-reducing failure risk and improving long-term stability in high-temperature under-hood environments. |
Use Scenario: Generating isolated 3.3V/200mA for PLC I/O modules, fieldbus isolators, and safety-rated controllers in factory automation systems. IC Role / Device Role / Timing Role: Micropower isolated flyback controller delivering stable output across 6V–100V input range with minimal external components. Use Value: Supports wide-input operation and achieves <0.5% minimum load requirement-ideal for intermittent-load industrial systems requiring reliable start-up and low standby consumption. |
| Medical Sensor Isolation | Telecom Remote Power |
Use Scenario: Powering isolated front-end amplifiers and ADCs in patient-monitoring equipment where galvanic isolation is required per IEC 60601-1. IC Role / Device Role / Timing Role: Isolated flyback controller implementing reinforced insulation via transformer-based barrier; no secondary-side feedback components. Use Value: Meets creepage/clearance requirements through simplified topology-reduces certification complexity while maintaining 1.5kV isolation rating with certified transformers. |
Use Scenario: Delivering isolated 12V/150mA to remote radio units (RRUs) and optical line terminals (OLTs) powered from 48V telecom rectifiers. IC Role / Device Role / Timing Role: High-voltage flyback controller operating up to 100V input with 150V SW rating-compatible with legacy -48V and +48V distributed power architectures. Use Value: Provides robust operation across wide line variations and temperature extremes-enabling single-design reuse across global telecom deployments. |
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#PBF | Requires external MOSFET; supports up to 100V input but lacks integrated switch; uses different sensing method (auxiliary winding). | Used where higher output power (>3W) or custom FET selection is needed; not pin-compatible. | Select LT3748EMSE#PBF only when design requires >260mA peak switch current or discrete FET optimization. |
| UCC28740DR | TI part with integrated 700V FET; operates up to 700V input; uses different primary-sensing architecture and lacks AEC-Q100 MP grade. | Targeted at universal AC/DC adapters and offline SMPS-not suited for automotive under-hood use due to lower temp rating (–40°C to 125°C). | Choose UCC28740DR for high-input AC/DC applications; avoid for automotive or extended-temp industrial use where LT8300MPS5#TRMPBF's –55°C rating is critical. |
Compared with LT3748EMSE#PBF and UCC28740DR, the LT8300MPS5#TRMPBF offers the only combination of integrated 150V/260mA switch, AEC-Q100 MP qualification, and true primary-side sensing without auxiliary winding-making it uniquely suited for compact, high-reliability isolated DC/DC in automotive and harsh-environment applications.
Availability
LT8300MPS5#TRMPBF is available at Aetrix Electronics and suitable for automotive auxiliary power, industrial isolated housekeeping supplies, and medical sensor isolation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT8300MPS5#TRMPBF 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 industrial, automotive, communications, and healthcare markets.
The LT8300MPS5#TRMPBF belongs to Analog Devices' µModule®-adjacent isolated power controller family, designed specifically for compact, high-reliability isolated DC/DC conversion in space- and temperature-constrained applications where opto-isolator elimination is critical.
FAQ
What is the maximum output power achievable with the LT8300MPS5#TRMPBF?
The LT8300MPS5#TRMPBF delivers up to 2W of isolated output power, depending on input voltage, transformer turns ratio, and output voltage. At 48V input and 5V output with a 6:1 transformer, typical output is 2.44W at 72V input dropping to 1.87W at 36V input. Peak power is limited by the 260mA switch current limit and 150V SW pin rating-exceeding either risks device damage.
Does the LT8300MPS5#TRMPBF require an opto-isolator or third transformer winding?
No-the LT8300MPS5#TRMPBF uses primary-side flyback pulse sampling on the SW pin to regulate output voltage, eliminating the need for opto-isolators or auxiliary windings. This reduces component count, improves long-term reliability, and avoids opto aging and nonlinearities that affect regulation accuracy over time and temperature.
How is output voltage programmed on the LT8300MPS5#TRMPBF?
Output voltage is set using a single external resistor (RFB) connected between the RFB pin and the SW node. The relationship is 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) to achieve target regulation.
What are the key differences between the LT8300MPS5#TRMPBF and commercial-grade LT8300ES5 variants?
The LT8300MPS5#TRMPBF is AEC-Q100 qualified for automotive applications with guaranteed operation from –55°C to 150°C junction temperature, whereas LT8300ES5#TRPBF is rated only from –40°C to 125°C. The MP grade also undergoes additional reliability stress testing-including extended temperature cycling and HTOL-making it suitable for under-hood and safety-critical systems where the standard grade is insufficient.
Can the LT8300MPS5#TRMPBF operate in continuous conduction mode (CCM)?
No-the LT8300MPS5#TRMPBF operates exclusively in boundary conduction mode (BCM) at heavy loads and discontinuous conduction mode (DCM) at light loads. It does not support CCM operation. Its control architecture relies on zero-current detection for accurate primary-side sampling, which is incompatible with CCM's continuous secondary current flow.
LT8300MPS5#TRMPBF 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#TRMPBF FAQ
1.How can I place an order for LT8300MPS5#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8300MPS5#TRMPBF 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#TRMPBF reliable?
The price and inventory of LT8300MPS5#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8300MPS5#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT8300MPS5#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8300MPS5#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8300MPS5#TRMPBF?
LT8300MPS5#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8300MPS5#TRMPBF 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#TRMPBF?
For technical support, including LT8300MPS5#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8300MPS5#TRMPBF requirements.
6.How does Aetrix verify that LT8300MPS5#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT8300MPS5#TRMPBF 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#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT8300MPS5#TRMPBF?
All LT8300MPS5#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8300MPS5#TRMPBF, 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#TRMPBF part is unused and in its original packaging.
Return procedure for LT8300MPS5#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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