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Analog Devices Inc. LT3001IS5#TRMPBF
- Part No.:
- LT3001IS5#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
LT3001IS5#TRMPBF.pdf
- Description:
- IC REG FLYBACK 5V 1.2A TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:259
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Product details
Overview
LT3001IS5#TRMPBF from Analog Devices is a micropower isolated flyback converter IC with integrated 1.2A/65V DMOS switch, operating from 4V to 36V input and delivering up to 4W isolated output power. It regulates output voltage via primary-side sampling-eliminating opto-isolators and third transformer windings-and sets VOUT using a single external resistor (RFB). Used in telecom and industrial auxiliary power supplies requiring compact, low-component-count isolation.
For engineers reviewing the LT3001IS5#TRMPBF datasheet, LT3001IS5#TRMPBF pinout, LT3001IS5#TRMPBF application, or LT3001IS5#TRMPBF equivalent, key selection criteria include boundary/low-ripple burst mode operation, EN/UVLO programmability, 0.8–350µA quiescent current, 10kHz minimum switching frequency, and TSOT-23 package compatibility with space-constrained isolated DC/DC designs.
Technical Context
The LT3001IS5#TRMPBF implements current-mode control in boundary conduction mode at heavy loads and low-ripple Burst Mode® at light loads, enabling high efficiency across 6mA–1.15A output range. Its internal 100µA RFB regulation current and trimmed 1.0V reference allow precise output programming via RFB = (NPS × (VOUT + VF)) / 100µA.
It samples reflected output voltage during zero-secondary-current intervals on the SW pin, eliminating need for secondary feedback. EN/UVLO pin provides accurate 1.228V enable threshold with 14mV hysteresis and 2.5µA hysteresis current for user-programmable VIN lockout, while internal soft-start and compensation reduce external component count.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 36V - supports wide-input industrial and automotive supply rails without pre-regulation. |
| Output Power Capability | Up to 4W isolated - sufficient for housekeeping power in telecom line cards and PLC I/O modules. |
| VIN Quiescent Current | 0.8µA (typ) active, <2µA shutdown - enables ultra-low-power standby in always-on isolated systems. |
| Switch Rating | Integrated 1.2A, 65V DMOS - eliminates external MOSFET and reduces BOM count in flyback designs. |
| RFB Regulation Current | 100µA (±2.5%) - enables accurate output voltage setting with standard 1% resistors and known NPS. |
| Minimum Switching Frequency | 9.4kHz (min) - ensures stable boundary-mode operation and predictable EMI profile. |
| EN/UVLO Threshold | 1.228V falling, 14mV hysteresis - allows robust input undervoltage protection with minimal external components. |
Pinout & Package
LT3001IS5#TRMPBF is housed in a 5-lead ThinSOT™ (TSOT-23) package with θJA = 215°C/W, optimized for compact isolated flyback layouts and thermal performance in confined spaces.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN/UVLO (Pin 1) | Enable and UVLO input | Controls IC startup/shutdown; 1.228V threshold with 2.5µA hysteresis current enables programmable VIN lockout using resistor divider. |
| GND (Pin 2) | Power ground reference | Primary return path for internal circuitry and feedback loop; must connect directly to local ground plane. |
| RFB (Pin 3) | Feedback current input | Accepts 100µA regulation current; voltage at this pin reflects output via transformer turns ratio, enabling opto-free regulation. |
| SW (Pin 4) | Drain of internal DMOS switch | Connects to transformer primary; handles 65V transients and carries full switching current-requires minimized trace area for EMI control. |
| VIN (Pin 5) | Main input supply | Powers internal logic and serves as reference for RFB feedback; requires local ceramic bypass capacitor to GND. |
Key Features
| Feature | Design Value |
|---|---|
| No-opto, no-third-winding regulation | Uses primary-side flyback waveform sampling to eliminate opto-isolator and auxiliary winding-reducing cost, size, and aging-related drift. |
| Boundary + Low-Ripple Burst Mode | Delivers >85% peak efficiency across 6mA–1.15A load range while maintaining <50mV output ripple at light loads. |
| Single-resistor VOUT programming | Output set by RFB only: VOUT = 100µA × RFB × NPS − VF; simplifies design and improves production consistency. |
| Internal soft-start & compensation | Eliminates external compensation network and soft-start timing capacitor-reducing bill-of-materials and layout complexity. |
| Output short-circuit protection | Auto-recovering protection limits fault energy and prevents transformer saturation during sustained shorts. |
Applications
| Industrial PLC Auxiliary Power | Telecom Line Card Isolation |
|---|---|
Use Scenario: Providing isolated 5V/500mA bias for analog front-end and digital control circuits in modular PLC backplanes. IC Role / Device Role / Timing Role: Primary-side isolated flyback controller managing energy transfer and regulation without secondary feedback. Use Value: Enables compact, high-reliability auxiliary supply with <0.5% minimum load requirement and no opto aging concerns. |
Use Scenario: Generating isolated 3.3V/300mA for Ethernet PHY and management MCU in carrier-grade line cards. IC Role / Device Role / Timing Role: Micropower flyback controller operating in boundary mode to maintain tight regulation under dynamic load steps. Use Value: Delivers 4W isolation in TSOT-23 footprint with <2µA shutdown current-extending system standby time. |
| Automotive Body Control Module | Medical Sensor Interface Isolation |
Use Scenario: Supplying isolated 5V power to CAN transceivers and door-lock actuators in 12V/24V vehicle architectures. IC Role / Device Role / Timing Role: Input-wide flyback controller with programmable UVLO (7.5V rise / 5.5V fall) for cold-crank resilience. Use Value: Maintains regulation across 4V–36V input swing while meeting AEC-Q200 stress requirements via robust thermal design. |
Use Scenario: Powering isolated ADC and signal conditioning stages in patient-connected biosensors requiring reinforced creepage/clearance. IC Role / Device Role / Timing Role: Safety-certifiable isolated power source with no opto-isolator-reducing failure modes in long-life medical devices. Use Value: Achieves >80% efficiency at 10mA load with low-ripple burst mode, minimizing heat in sealed sensor enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated flyback controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCC28740DR | Requires external HV start-up circuit; no integrated 65V switch-needs external MOSFET; higher IQ (100µA active). | Targeted at higher-power (>10W) flyback designs with tighter EMI requirements; lacks RFB-based VOUT programming simplicity. | Choose UCC28740DR when higher output power and programmable slope compensation are needed; avoid if board space or BOM count is critical. |
| MAX17690ATP+T | Fixed 5V output (non-adjustable); no EN/UVLO pin; 100V integrated switch; higher min. load (~1% of full scale). | Designed for cost-sensitive, fixed-output auxiliary supplies where output flexibility is unnecessary. | Choose MAX17690ATP+T for simple 5V-only applications with no VOUT adjustment or UVLO needs; not suitable for programmable or wide-VIN designs. |
Compared with UCC28740DR and MAX17690ATP+T, the LT3001IS5#TRMPBF uniquely combines single-resistor VOUT programming, ultra-low IQ, integrated 65V switch, and no-opto regulation in a 5-lead TSOT-23-making it optimal for space-constrained, low-power isolated supplies demanding design simplicity and long-term stability.
Availability
LT3001IS5#TRMPBF is available at Aetrix Electronics and suitable for industrial PLC auxiliary power, telecom line card isolation, and automotive body control module applications requiring stable component supply and guaranteed long-term sourcing.
Supply support for LT3001IS5#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 precision instrumentation, industrial automation, and communications markets.
The LT3001IS5#TRMPBF belongs to Analog Devices' µModule®-adjacent isolated power controller family, designed specifically for compact, low-component-count flyback converters in safety-isolated subsystems where reliability and long-term parametric stability are critical.
FAQ
What is the maximum output power supported by the LT3001IS5#TRMPBF?
The LT3001IS5#TRMPBF delivers up to 4W of isolated output power across its 4V–36V input range. This capability is validated at multiple input voltages: 0.40A at 5VIN, 0.70A at 12VIN, 1.00A at 24VIN, and 1.15A at 36VIN. Output power depends on transformer design, layout, and thermal management-actual delivered power may vary slightly based on PCB copper area and ambient temperature.
How is output voltage programmed on the LT3001IS5#TRMPBF?
The LT3001IS5#TRMPBF sets output voltage 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. For a 5V output with NPS = 3 and VF ≈ 0.3V, RFB ≈ 159kΩ.
Does the LT3001IS5#TRMPBF require an opto-isolator or third transformer winding?
No, the LT3001IS5#TRMPBF does not require an opto-isolator or third transformer winding. It achieves regulation by sampling the reflected output voltage directly from the primary-side flyback waveform on the SW pin during zero-secondary-current intervals. This architecture eliminates opto aging, nonlinearity, and extra winding losses-confirmed in the device's typical application schematic and operational description.
What are the key thermal considerations for the LT3001IS5#TRMPBF in a TSOT-23 package?
The LT3001IS5#TRMPBF in the 5-lead TSOT-23 package has a junction-to-ambient thermal resistance (θJA) of 215°C/W. To maintain reliable operation within the –40°C to 125°C junction temperature range, PCB layout must maximize copper area under the exposed pad (if present) and minimize trace length on SW and VIN pins. Derating is recommended above 70°C ambient, especially at full 4W load.
Can the LT3001IS5#TRMPBF operate with no load?
The LT3001IS5#TRMPBF has a minimum load requirement of less than 0.5% of full output power (e.g., ~6mA for a 5V/1A design), due to its need to sustain minimum switching activity for accurate voltage sampling. Below this threshold, regulation degrades. A Zener diode (e.g., 6V/1W for 5V output) or small bleed resistor can satisfy this requirement without impacting efficiency significantly.
LT3001IS5#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
- Topology:
- Flyback
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 1.2A
- Frequency - Switching:
- 10kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-5
LT3001IS5#TRMPBF FAQ
1.How can I place an order for LT3001IS5#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3001IS5#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 LT3001IS5#TRMPBF reliable?
The price and inventory of LT3001IS5#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3001IS5#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT3001IS5#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3001IS5#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3001IS5#TRMPBF?
LT3001IS5#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3001IS5#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 LT3001IS5#TRMPBF?
For technical support, including LT3001IS5#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3001IS5#TRMPBF requirements.
6.How does Aetrix verify that LT3001IS5#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT3001IS5#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 LT3001IS5#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT3001IS5#TRMPBF?
All LT3001IS5#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3001IS5#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 LT3001IS5#TRMPBF part is unused and in its original packaging.
Return procedure for LT3001IS5#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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