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Analog Devices Inc. LT8300ES5#TRMPBF
- Part No.:
- LT8300ES5#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
LT8300ES5#TRMPBF.pdf
- Description:
- IC REG FLYBACK 260MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,739
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Product details
Overview
LT8300ES5#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. 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 operation enables compact magnetics, while low-ripple Burst Mode maintains >85% efficiency at light loads in telecom and industrial auxiliary supplies.
For engineers reviewing the LT8300ES5#TRMPBF datasheet, LT8300ES5#TRMPBF pinout, LT8300ES5#TRMPBF application, or LT8300ES5#TRMPBF equivalent, key selection criteria include its 150V SW rating, 70µA sleep-mode quiescent current, 5-lead TSOT-23 package, AEC-Q100 qualification (E-grade), and absence of external compensation requirements.
Technical Context
The LT8300ES5#TRMPBF implements primary-side regulation using flyback pulse sensing: it samples the reflected output voltage on the SW pin when secondary current reaches zero, enabling accurate regulation without optocouplers or auxiliary windings. Its current-mode control includes boundary conduction mode at heavy load (variable frequency, zero-current switching) and discontinuous conduction mode with internal 750kHz max frequency clamp at medium load.
At light load, it enters low-ripple Burst Mode-alternating between active and sleep modes-with 7.5kHz minimum switching frequency and <0.5% full-load minimum load requirement. Internal 1.223V EN/UVLO threshold with 2.5µA hysteresis current supports precise input undervoltage lockout programming, and the 12.23kΩ internal RREF sets RFB-based output voltage per VOUT = (100µA × RFB)/NPS − VF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6V to 100V - supports wide-input industrial, telecom, and automotive battery-supplied systems without pre-regulation. |
| Integrated Switch | 150V/260mA DMOS - eliminates external high-voltage switch; enables direct connection to 100VIN rails with margin for leakage spikes. |
| Quiescent Current | 70µA (sleep), 330µA (active) - enables micropower operation in always-on auxiliary supplies with minimal standby loss. |
| Output Power | Up to 2W isolated - sufficient for housekeeping rails in PLCs, motor drives, and isolated gate drivers. |
| Regulation Method | Primary-side flyback pulse sampling - removes opto-isolator, third winding, and associated aging/nonlinearity issues. |
| Switching Modes | Boundary mode (heavy load), DCM (medium), low-ripple Burst Mode (light load) - balances efficiency, EMI, and output ripple across full load range. |
| Package | 5-lead TSOT-23 - surface-mount, thermally enhanced package compatible with standard SMT assembly and space-constrained PCB layouts. |
Pinout & Package
LT8300ES5#TRMPBF is housed in a 5-lead plastic TSOT-23 package (S5), with θJA = 150°C/W and TJMAX = 150°C. The package is RoHS-compliant, lead-free, and qualified for –40°C to +125°C operating junction temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN/UVLO (Pin 1) | Enable / Input Undervoltage Lockout Input | Accurate 1.223V threshold with 2.5µA hysteresis current; enables programmable VIN UVLO using resistor divider or direct tie to VIN. |
| GND (Pin 2) | Power Ground Reference | Low-impedance return path for internal regulators and feedback circuitry; must connect directly to local ground plane. |
| RFB (Pin 3) | External Feedback Resistor Terminal | Connects to transformer primary SW node; 100µA regulation current flows here to set VOUT via RFB = (VOUT + VF) × NPS / 100µA. |
| SW (Pin 4) | Drain of Integrated 150V DMOS Switch | High dv/dt node requiring minimized trace area; sees VIN + (VOUT + VF) × NPS during flyback; absolute max 150V. |
| VIN (Pin 5) | Main Input Supply and Reference | Supplies internal circuitry and serves as reference for RFB feedback; requires local ceramic bypass capacitor (e.g., 1µF). |
Key Features
| Feature | Design Value |
|---|---|
| No opto-isolator or third winding required | Reduces BOM count, cost, and board area; eliminates opto aging, nonlinearity, and slow transient response. |
| Single-resistor VOUT programming | Enables rapid output voltage changes (e.g., 3.3V, 5V, 12V) without redesigning feedback network or compensation. |
| Internal compensation and soft-start | Removes external compensation components and startup inrush control circuitry; reduces design cycle time and layout sensitivity. |
| Boundary mode + low-ripple Burst Mode | Delivers <1% output voltage ripple at light load while maintaining >85% peak efficiency and stable regulation down to 0.5% full load. |
| AEC-Q100 qualified (Grade E) | Validated for automotive auxiliary power applications including infotainment, ADAS sensors, and body electronics. |
Applications
| Industrial PLC Auxiliary Power | Automotive Infotainment Housekeeping |
|---|---|
Use Scenario: Providing isolated 5V/200mA auxiliary rail for microcontroller, CAN transceiver, and sensor interface in programmable logic controllers. IC Role / Device Role / Timing Role: Primary-side isolated flyback controller regulating output via SW-pin flyback pulse sampling without optocoupler. Use Value: Eliminates opto-isolator drift and aging, enabling stable 5V ±3% regulation over 10-year field life at –40°C to +85°C ambient. | Use Scenario: Generating isolated 3.3V/150mA supply for display controller and audio codec in automotive head units powered from 12V battery. IC Role / Device Role / Timing Role: Micropower flyback controller with AEC-Q100 Grade E qualification and 70µA sleep current for always-on subsystems. Use Value: Meets automotive cold-crank (6V) and load-dump (100V) requirements while maintaining <50mVpp output ripple during burst-mode operation. |
| Medical Isolated Sensor Interface | Telecom Remote PHY Power |
Use Scenario: Delivering 12V/100mA isolated bias for isolated amplifiers and ADC drivers in patient-connected diagnostic equipment. IC Role / Device Role / Timing Role: High-voltage flyback controller supporting 1.5kV reinforced isolation transformers and primary-side regulation. Use Value: Enables IEC 60601-1 compliance without secondary-side feedback components, reducing creepage/clearance complexity. | Use Scenario: Powering remote PHY devices in fiber-to-the-home (FTTH) nodes with 48V–72V input and strict EMI limits. IC Role / Device Role / Timing Role: Boundary-mode flyback controller with low-EMI switching and integrated soft-start for hot-swap compatibility. Use Value: Achieves CISPR-32 Class B conducted emissions without Y-capacitors, leveraging clean boundary-mode waveform and minimized SW node area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated flyback controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT3748EMS#PBF | Requires external MOSFET; no integrated switch; supports higher output power (up to 10W); includes slope compensation and sync capability. | Better suited for >3W designs or where adjustable frequency/synchronization is required; lacks micropower sleep mode. | Select LT3748EMS#PBF when higher power, external FET flexibility, or frequency synchronization is needed; not drop-in for LT8300ES5#TRMPBF. |
| UCC28911DR | TI part with integrated 700V MOSFET; fixed 70kHz frequency; no boundary mode; higher IQ (250µA active); no AEC-Q100 grade. | Targets universal AC input (85–265VAC) flybacks; less suitable for low-IQ DC-DC or automotive use due to missing qualification and higher quiescent draw. | Choose UCC28911DR for universal offline applications; avoid for 6–100V DC input or automotive-qualified designs requiring <100µA sleep current. |
Compared with LT3748EMS#PBF and UCC28911DR, the LT8300ES5#TRMPBF uniquely combines integrated 150V/260mA switching, 70µA sleep current, primary-side regulation, and AEC-Q100 qualification in a 5-lead TSOT-23-making it optimal for space- and power-constrained isolated DC-DC auxiliary supplies.
Availability
LT8300ES5#TRMPBF is available at Aetrix Electronics and suitable for industrial PLCs, automotive infotainment systems, medical sensor interfaces, and telecom remote PHY modules requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for LT8300ES5#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LT8300 product line delivers micropower isolated flyback controllers with integrated high-voltage switches, targeting compact, reliable, and certification-ready auxiliary power solutions for safety-critical and space-constrained applications.
FAQ
What is the maximum input voltage supported by the LT8300ES5#TRMPBF?
The LT8300ES5#TRMPBF supports an absolute maximum input voltage of 100V on the VIN pin. Operation is specified from 6V to 100V, making it suitable for wide-input industrial and automotive battery-fed systems. Exceeding 100V risks permanent damage, especially considering flyback voltage spikes on the SW pin that sum with VIN.
How does the LT8300ES5#TRMPBF regulate output voltage without an opto-isolator?
The LT8300ES5#TRMPBF samples the isolated output voltage directly from the primary-side flyback pulse on the SW pin when secondary current reaches zero. This primary-side sensing-enabled by internal sample-and-hold error amplification and boundary-mode timing-eliminates the need for opto-isolators or third-winding feedback, reducing cost, size, and long-term drift.
What is the purpose of the RFB pin on the LT8300ES5#TRMPBF?
The RFB pin on the LT8300ES5#TRMPBF accepts a single external resistor to program the output voltage. With a nominal 100µA regulation current flowing through RFB and an internal 12.23kΩ reference resistor, VOUT is set by VOUT = (100µA × RFB)/NPS − VF, where NPS is the transformer turns ratio and VF is the output diode forward voltage.
Does the LT8300ES5#TRMPBF require external compensation components?
No, the LT8300ES5#TRMPBF integrates full loop compensation internally. This eliminates external Type II or Type III compensation networks, simplifying design, reducing component count, and improving consistency across production units-critical for high-reliability auxiliary power applications.
Is the LT8300ES5#TRMPBF qualified for automotive applications?
Yes, the LT8300ES5#TRMPBF is AEC-Q100 qualified for automotive applications (Grade E, –40°C to +125°C). It meets stress test requirements for temperature cycling, humidity, and mechanical shock, and supports functional safety system-level implementation in infotainment, ADAS, and body electronics.
LT8300ES5#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:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-5
LT8300ES5#TRMPBF FAQ
1.How can I place an order for LT8300ES5#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8300ES5#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 LT8300ES5#TRMPBF reliable?
The price and inventory of LT8300ES5#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8300ES5#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT8300ES5#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8300ES5#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8300ES5#TRMPBF?
LT8300ES5#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8300ES5#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 LT8300ES5#TRMPBF?
For technical support, including LT8300ES5#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8300ES5#TRMPBF requirements.
6.How does Aetrix verify that LT8300ES5#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT8300ES5#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 LT8300ES5#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT8300ES5#TRMPBF?
All LT8300ES5#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8300ES5#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 LT8300ES5#TRMPBF part is unused and in its original packaging.
Return procedure for LT8300ES5#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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