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Analog Devices Inc. LT3001ES5#TRPBF
- Part No.:
- LT3001ES5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
LT3001ES5#TRPBF.pdf
- Description:
- IC REG FLYBACK 5V 1.2A TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,805
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Product details
Overview
LT3001ES5#TRPBF 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 windings-and sets VOUT using a single external resistor (RFB). Used in telecom auxiliary supplies and industrial isolated housekeeping rails.
For engineers reviewing the LT3001ES5#TRPBF datasheet, LT3001ES5#TRPBF pinout, LT3001ES5#TRPBF application, or LT3001ES5#TRPBF equivalent, key selection criteria include boundary/low-ripple burst mode operation, 0.8–350µA quiescent current, ±14mV EN/UVLO hysteresis, 100µA RFB regulation current, and 5-lead TSOT-23 package compatibility.
Technical Context
The LT3001ES5#TRPBF 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 current range. Its internal 65V DMOS switch and primary-side feedback architecture eliminate secondary-side sensing components.
It samples the reflected output voltage on the SW pin during zero-secondary-current intervals, requiring ≥450ns minimum off-time for accurate error amplifier settling. The device integrates soft-start, internal compensation, and output short-circuit protection without external timing or compensation networks.
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 | Up to 4W - sufficient for isolated auxiliary/housekeeping rails in telecom and medical systems. |
| VOUT Programming | Single RFB resistor - simplifies design and eliminates opto-isolator or third-winding complexity. |
| Quiescent Current | 0.8µA (typ) active, <2µA shutdown - enables ultra-low-power standby operation. |
| Switch Rating | 1.2A, 65V DMOS - handles flyback voltage spikes up to 65V with built-in overcurrent limiting. |
| RFB Regulation Current | 100µA (±2.5%) - determines output voltage accuracy via VOUT = 100µA × RFB × NPS − VF. |
| EN/UVLO Threshold | 1.228V enable / 0.2V disable with 14mV hysteresis - enables precise, programmable input undervoltage lockout. |
Pinout & Package
LT3001ES5#TRPBF is housed in a 5-lead plastic TSOT-23 package (S5), with θJA = 215°C/W and JEDEC MO-193 compliance. Pin layout optimized for minimal EMI and thermal performance in space-constrained isolated DC/DC designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN/UVLO (Pin 1) | Enable / Undervoltage Lockout Input | Pull below 0.2V for shutdown; 1.228V threshold enables programmable VIN UVLO with 2.5µA hysteresis current. |
| GND (Pin 2) | Power Ground Reference | Local ground plane connection for internal circuitry and feedback reference stability. |
| RFB (Pin 3) | Feedback Resistor Input | Connects to transformer primary SW node; 100µA current flows into this pin to set VOUT via RFB. |
| SW (Pin 4) | Drain of Internal DMOS Switch | High-voltage switching node; must be routed with minimal trace area to suppress EMI and voltage spikes. |
| VIN (Pin 5) | Main Input Supply | Supplies internal bias and serves as reference for RFB feedback; requires local ceramic bypass capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| No opto-isolator or third winding required | Reduces BOM count, cost, and footprint while eliminating opto aging and nonlinearity issues. |
| Boundary + low-ripple Burst Mode® operation | Maintains >75% efficiency from 6mA to full load, with minimized output ripple at light loads. |
| Internal soft-start and compensation | Eliminates external RC networks and ensures stable startup without output overshoot. |
| Output short-circuit protection | Prevents damage during fault conditions without external current-sense or latch circuitry. |
| Minimum load <0.5% of full output | Enables operation down to ~6mA (for 5V/1A design), reducing need for Zener preload in most applications. |
Applications
| Telecom Auxiliary Power | Industrial Housekeeping Supply |
|---|---|
Use Scenario: Providing isolated 5V bias for line-card control logic and interface ICs in 48V telecom systems. IC Role / Device Role / Timing Role: Primary-side isolated flyback controller regulating output without secondary feedback. Use Value: Eliminates opto-isolator and saves PCB area while maintaining <±2% output regulation across temperature. | Use Scenario: Generating isolated 3.3V/5V for PLC I/O modules and sensor front-ends in 24V factory automation systems. IC Role / Device Role / Timing Role: Micropower flyback controller delivering stable auxiliary rail with <0.8µA quiescent current. Use Value: Enables always-on monitoring capability with minimal standby power draw and no external compensation. |
| Automotive Body Control Module | Medical Isolated Monitoring Rail |
Use Scenario: Supplying isolated 5V for CAN transceiver bias and microcontroller reset circuitry in 12V vehicle subsystems. IC Role / Device Role / Timing Role: Boundary-mode flyback controller with 4V–36V input range accommodating cold-crank and load-dump transients. Use Value: Sustains regulation during 4.5V cranking events and withstands 36V load-dump spikes without derating. | Use Scenario: Delivering patient-isolated 3.3V for analog front-end amplifiers and ADCs in portable diagnostic equipment. IC Role / Device Role / Timing Role: Safety-certifiable isolated power source meeting creepage/clearance requirements via transformer isolation. Use Value: Achieves reinforced isolation without opto drift, supporting long-term calibration stability in clinical environments. |
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 | Higher 700V MOSFET, fixed-frequency QR mode, no internal soft-start; requires external compensation. | Targets higher-input AC/DC adapters (90–265VAC); less suited for low-VIN (<12V) DC/DC flyback. | Choose UCC28740DR only when designing universal-input offline converters with >400V stress margin. |
| MAX17690ATP+T | Integrated 100V/1.2A MOSFET, supports synchronous rectification, but lacks low-ripple burst mode and has higher 1.5mA IQ. | Better for high-efficiency 12–48V industrial supplies needing SR control; not optimized for micropower standby. | Select MAX17690ATP+T when synchronous rectification and tighter load regulation outweigh micropower needs. |
Compared with UCC28740DR and MAX17690ATP+T, the LT3001ES5#TRPBF delivers superior light-load efficiency (<0.8µA IQ), simpler RFB-only programming, and lower system-level component count-making it optimal for compact, low-power isolated DC/DC where input stays within 4–36V.
Availability
LT3001ES5#TRPBF is available at Aetrix Electronics and suitable for telecom auxiliary power, industrial housekeeping supplies, and automotive body control modules requiring stable component supply, full-temperature-range (-40°C to 125°C) operation, and long-lifecycle availability.
Supply support for LT3001ES5#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision, power, and signal integrity markets since 1965.
The LT3001ES5#TRPBF belongs to Analog Devices' µModule® and isolated power controller product line, designed specifically for space-constrained, low-power isolated DC/DC conversion in safety-critical and reliability-demanding applications.
FAQ
What is the maximum output power supported by the LT3001ES5#TRPBF?
The LT3001ES5#TRPBF delivers up to 4W of isolated output power across its 4V to 36V input range. This rating assumes proper transformer selection (e.g., ≥2A saturation current), adequate heatsinking for the TSOT-23 package, and operation within the specified –40°C to 125°C junction temperature range. Real-world output depends on transformer turns ratio, primary inductance, and layout parasitics.
How does the LT3001ES5#TRPBF regulate output voltage without an opto-isolator?
The LT3001ES5#TRPBF samples the reflected output voltage directly from the primary-side flyback waveform on the SW pin during zero-secondary-current intervals. This method uses an internal 100µA current source into the RFB pin and a trimmed 1.0V reference to derive VOUT = 100µA × RFB × NPS − VF, eliminating the need for opto-isolators or third windings while maintaining ±2% regulation.
What is the minimum load requirement for stable operation of the LT3001ES5#TRPBF?
The LT3001ES5#TRPBF typically requires less than 0.5% of full output power as minimum load-approximately 6mA for a 5V/1A design. This stems from its need to maintain minimum switching frequency (~10kHz) and sample time (>450ns). If preloading is unacceptable, a 6V Zener diode (cathode to output) can serve as a passive minimum load.
Can the LT3001ES5#TRPBF operate with input voltages below 4V?
No-the LT3001ES5#TRPBF has a guaranteed operational input range of 4V to 36V per its Absolute Maximum Ratings and Electrical Characteristics. Operation below 4V may result in failure to start, unstable regulation, or undefined behavior. The 0.2V EN/UVLO disable threshold is independent of VIN minimum; it only controls enable/disable state, not functional operation.
What package type and thermal characteristics apply to the LT3001ES5#TRPBF?
The LT3001ES5#TRPBF uses a 5-lead plastic TSOT-23 (S5) package with θJA = 215°C/W. Its JEDEC MO-193-compliant footprint measures 2.90mm × 1.60mm × 0.95mm max. Thermal performance relies heavily on PCB copper area under the exposed pad (Pin 2/GND); recommended solder pad layout follows IPC-7351B Type C guidelines for optimal heat dissipation.
LT3001ES5#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
- 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
LT3001ES5#TRPBF FAQ
1.How can I place an order for LT3001ES5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3001ES5#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 LT3001ES5#TRPBF reliable?
The price and inventory of LT3001ES5#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3001ES5#TRPBF is usually 5 days.
3.What payment methods are accepted for LT3001ES5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3001ES5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3001ES5#TRPBF?
LT3001ES5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3001ES5#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 LT3001ES5#TRPBF?
For technical support, including LT3001ES5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3001ES5#TRPBF requirements.
6.How does Aetrix verify that LT3001ES5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT3001ES5#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 LT3001ES5#TRPBF meets industry standards.
7.What is the process for return or replacement of LT3001ES5#TRPBF?
All LT3001ES5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3001ES5#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 LT3001ES5#TRPBF part is unused and in its original packaging.
Return procedure for LT3001ES5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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