My Inquiry
My Account
Analog Devices Inc. LT8300HS5#TRMPBF
- Part No.:
- LT8300HS5#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
LT8300HS5#TRMPBF.pdf
- Description:
- IC REG FLYBACK 260MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,417
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT8300HS5#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 sets VOUT using a single external resistor. Used in automotive auxiliary supplies requiring AEC-Q100 qualification and high-temperature operation.
For engineers reviewing the LT8300HS5#TRMPBF datasheet, LT8300HS5#TRMPBF pinout, LT8300HS5#TRMPBF application, or LT8300HS5#TRMPBF equivalent, this page provides verified technical context, validated pin functions, confirmed thermal specifications (–40°C to 150°C), real-world efficiency curves, and two rigorously cross-checked alternative parts for isolated flyback designs.
Technical Context
The LT8300HS5#TRMPBF implements current-mode control in boundary conduction mode at heavy loads and transitions to discontinuous conduction mode when switching frequency hits ~750kHz, then enters low-ripple Burst Mode below ~1mA load. Its flyback pulse sensing circuit samples VOUT during zero-secondary-current events, enabling regulation without secondary feedback components.
Internal features include 1.223V EN/UVLO threshold with 2.5µA hysteresis current, 100µA RFB regulation current, 160ns minimum on-time and 350ns minimum off-time for stable sampling, and integrated soft-start with 2.7ms timer. The device uses a sample-and-hold error amplifier referenced to an internal 12.23kΩ trimmed resistor and bandgap reference.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6V to 100V - supports wide-input industrial and telecom supply rails without external pre-regulation. |
| Switch Rating | 150V DMOS, 260mA max - enables direct interface with 100VIN systems while limiting SW pin stress to safe levels with proper turns ratio selection. |
| Quiescent Current | 70µA sleep mode / 330µA active mode - sustains ultra-low standby power in always-on isolated housekeeping supplies. |
| Operating Temp Range | –40°C to +150°C junction - qualified per AEC-Q100 Grade H for under-hood automotive applications. |
| Regulation Method | Primary-side flyback pulse sampling - removes need for opto-isolator or auxiliary winding, reducing BOM count and improving reliability. |
| Output Power Capability | Up to 2W isolated - sufficient for microcontroller bias, sensor interface, or gate driver supplies in compact layouts. |
| Switching Frequency Range | 6kHz to 780kHz - dynamically adjusts between boundary, discontinuous, and burst modes to maintain >85% efficiency across 0.5%–100% load range. |
Pinout & Package
LT8300HS5#TRMPBF is housed in a 5-lead ThinSOT™ (TSOT-23) package with exposed pad for thermal enhancement and JEDEC-standard footprint (2.9mm × 1.6mm × 0.85mm height). 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.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN/UVLO (Pin 1) | Enable and input undervoltage lockout input | Shuts down IC below 0.3V; enables at 1.223V with 2.5µA hysteresis current - allows precise, temperature-stable VIN UVLO programming. |
| GND (Pin 2) | Power and signal ground reference | Must connect directly to local ground plane - serves as return path for internal regulators and RFB current sensing. |
| RFB (Pin 3) | Feedback resistor connection node | Draws 100µA regulation current - sets output voltage via VOUT = (100µA × RFB)/NPS − VF, where NPS is transformer turns ratio. |
| SW (Pin 4) | Drain of internal 150V/260mA DMOS switch | Carries high dv/dt flyback pulses - requires minimized trace area and careful layout to limit EMI and voltage overshoot. |
| VIN (Pin 5) | Main input supply and reference rail | Supplies internal circuitry and references RFB feedback - must be locally bypassed with ≥1µF ceramic capacitor to GND. |
Key Features
| Feature | Design Value |
|---|---|
| Primary-side regulation | Eliminates opto-isolator and third winding - reduces component count, cost, and long-term drift issues in isolated supplies. |
| Boundary + Burst Mode operation | Maintains >85% efficiency from 1mA to full load - avoids light-load inefficiency common in fixed-frequency flyback controllers. |
| AEC-Q100 Grade H qualification | Validated for –40°C to +150°C operation - suitable for automotive engine control modules, ADAS sensors, and battery management systems. |
| Internal compensation & soft-start | Reduces external components to only RFB, transformer, input/output caps, and diode - accelerates design cycle and improves consistency. |
| Low minimum load requirement | <0.5% of full output - enables stable regulation even with no-load or microamp-level standby conditions. |
Applications
| Automotive Auxiliary Power | Industrial Isolated Bias Supply |
|---|---|
|
Use Scenario: Providing isolated 5V/200mA bias for CAN transceivers and microcontrollers in engine control units. IC Role / Device Role / Timing Role: Primary-side flyback controller regulating output via reflected flyback pulse, eliminating opto-isolator dependency. Use Value: Enables AEC-Q100-compliant, high-temp-stable power delivery with <0.5% minimum load support and 70µA sleep current for low-power wake-up circuits. |
Use Scenario: Generating isolated 12V/100mA supply for PLC I/O channel isolation barriers. IC Role / Device Role / Timing Role: Micropower flyback controller operating in boundary mode up to 300mA, transitioning to low-ripple Burst Mode below 1mA. Use Value: Delivers 2W isolated output with ±5% regulation accuracy across –40°C to +85°C ambient, minimizing transformer size via variable-frequency operation. |
| Medical Sensor Interface Supply | Telecom Housekeeping Power |
|
Use Scenario: Powering isolated analog front-ends in patient-monitoring EEG/ECG modules requiring reinforced 1.5kV isolation. IC Role / Device Role / Timing Role: Isolated flyback controller using Wurth 750312557 (6:1) transformer to achieve 3.3V/420mA from 24V input. Use Value: Achieves <15mVpp output ripple in Burst Mode and meets IEC 60601 creepage/clearance requirements via transformer-based isolation. |
Use Scenario: Generating +5V/300mA and –5V/67mA dual outputs for telecom line card supervisors and clock buffers. IC Role / Device Role / Timing Role: Dual-output flyback controller using Sumida 10396-T028 (2:1:1) transformer with center-tapped secondary. Use Value: Supports 48V telecom input range with 100VIN tolerance and maintains regulation stability across 36–72V nominal distribution bus variations. |
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 100V input but lacks integrated switch; includes programmable soft-start and slope compensation. | Better suited for >5W designs needing higher peak current or adjustable frequency; not AEC-Q100 qualified. | Select when higher output power or design flexibility outweighs integration and automotive qualification needs. |
| UCC28740DR | TI part with integrated 700V MOSFET; operates up to 75V input; uses different primary-sensing architecture with tighter VOUT tolerance (±1.5%). | Targets universal AC input (85–265VAC); not rated for 100VIN DC or automotive temperature grade. | Prefer for offline AC/DC adapters; avoid for 100VIN DC or AEC-Q100 automotive use cases. |
Compared with LT3748EMSE#TRPBF and UCC28740DR, the LT8300HS5#TRMPBF uniquely combines 100VIN capability, integrated 150V/260mA switch, AEC-Q100 Grade H qualification, and primary-side regulation in a 5-lead TSOT-23 - making it optimal for space-constrained, high-reliability isolated DC/DC in automotive and industrial settings.
Availability
LT8300HS5#TRMPBF is available at Aetrix Electronics and suitable for automotive auxiliary power, industrial isolated bias supplies, medical sensor interfaces, and telecom housekeeping power requiring stable component supply and AEC-Q100 compliance.
Supply support for LT8300HS5#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 precision instrumentation, industrial automation, and automotive markets.
The LT8300 product line delivers micropower isolated flyback controllers optimized for simplicity, high temperature operation, and minimal external components - targeting automotive, industrial, and medical isolated power applications.
FAQ
What is the maximum input voltage rating for LT8300HS5#TRMPBF?
The LT8300HS5#TRMPBF has an absolute maximum input voltage rating of 100V, with guaranteed operation across 6V to 100V. This enables direct use in 48V and 72V industrial and automotive battery-fed systems without pre-regulation. The internal 150V DMOS switch and robust EN/UVLO circuitry ensure reliable startup and protection across this full range.
How does LT8300HS5#TRMPBF regulate output voltage without an opto-isolator?
The LT8300HS5#TRMPBF samples the isolated output voltage directly from the primary-side flyback waveform at the SW pin during zero-secondary-current events. Its internal flyback pulse sense circuit converts the reflected voltage into a 100µA regulation current flowing through the external RFB resistor, enabling precise VOUT setting without opto-isolators or third windings.
What is the operating temperature range of LT8300HS5#TRMPBF?
The LT8300HS5#TRMPBF is specified for –40°C to +150°C junction temperature and is AEC-Q100 Grade H qualified. This extended range supports under-hood automotive applications, industrial environments with high ambient temperatures, and systems requiring long-term reliability at elevated thermal stress.
Can LT8300HS5#TRMPBF support dual-output flyback designs?
Yes - LT8300HS5#TRMPBF supports dual-output configurations using center-tapped or multi-winding transformers such as Sumida 10396-T028 (2:1:1) or Wurth 750312558 (2:1:1). Output voltage is set by the RFB resistor and primary-to-secondary turns ratio; cross-regulation depends on transformer coupling and diode matching.
What is the minimum load requirement for stable regulation with LT8300HS5#TRMPBF?
The LT8300HS5#TRMPBF maintains stable regulation down to less than 0.5% of full output load - approximately 1mA for a 200mA design. This is enabled by low-ripple Burst Mode operation and accurate 100µA RFB regulation current, making it ideal for systems with intermittent or ultra-low-power standby states.
LT8300HS5#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 ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-5
LT8300HS5#TRMPBF FAQ
1.How can I place an order for LT8300HS5#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8300HS5#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 LT8300HS5#TRMPBF reliable?
The price and inventory of LT8300HS5#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8300HS5#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT8300HS5#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8300HS5#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8300HS5#TRMPBF?
LT8300HS5#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8300HS5#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 LT8300HS5#TRMPBF?
For technical support, including LT8300HS5#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8300HS5#TRMPBF requirements.
6.How does Aetrix verify that LT8300HS5#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT8300HS5#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 LT8300HS5#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT8300HS5#TRMPBF?
All LT8300HS5#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8300HS5#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 LT8300HS5#TRMPBF part is unused and in its original packaging.
Return procedure for LT8300HS5#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT8300HS5#TRMPBF Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
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…
