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Analog Devices Inc. LT3092MPST#TRPBF
- Part No.:
- LT3092MPST#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Current Regulation/Management
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
LT3092MPST#TRPBF.pdf
- Description:
- IC CURRENT SOURCE 1% SOT223-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,668
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Product details
Overview
LT3092MPST#TRPBF from Analog Devices is a 2-terminal programmable current source IC with ±1% initial SET pin current accuracy, 0.5mA–200mA output range, 1.2V–40V input voltage capability, and reverse-voltage/reverse-current protection. It operates without input/output capacitors and is used in intrinsic safety circuits, remote sensor biasing, and precision current limiting for industrial instrumentation.
For engineers reviewing the LT3092MPST#TRPBF datasheet, LT3092MPST#TRPBF pinout, LT3092MPST#TRPBF application, or LT3092MPST#TRPBF equivalent, key selection considerations include its –55°C to 125°C operating junction temperature range, 3-lead SOT-223 package, 10µA precision reference current, dropout voltage ≤1.45V at 200mA, and Kelvin-sensed current regulation <10ppm/V.
Technical Context
The LT3092MPST#TRPBF implements a precision 10µA bandgap-referenced current source feeding the noninverting input of a high-gain power op-amp, enabling resistor-ratio-based current programming. Its architecture delivers high DC/AC impedance and eliminates capacitor requirements for stability.
It features internal reverse-battery protection, thermal shutdown with hysteresis, and current limiting. The MP-grade variant is 100% tested over –55°C to 125°C, with guaranteed line regulation <0.001%/V and offset voltage ≤±4mV across temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current Range | 0.5mA to 200mA - set by external RSET/ROUT ratio; minimum 0.5mA required for regulation |
| SET Pin Current | 10µA ±1% - stable reference for precise current programming; low TC ensures accuracy over temperature |
| Input Voltage Range | 1.2V to 40V - supports wide supply rails including 3.3V, 5V, 12V, 24V, and 36V systems |
| Dropout Voltage | 1.45V max at 200mA - defines minimum headroom needed between IN and OUT pins |
| Line Regulation | <0.001%/V - ensures output current remains stable despite input voltage variation |
| Current Regulation | <10ppm/V from 1.5V to 40V - critical for high-accuracy current sourcing in varying supply conditions |
| Operating Temperature | –55°C to 125°C - MP grade qualified for extended industrial, aerospace, and harsh-environment use |
Pinout & Package
LT3092MPST#TRPBF uses the 3-lead plastic SOT-223 package (ST package), with exposed tab internally connected to OUT and requiring soldering to PCB OUT net for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 3) | Power Input | Supplies bias and load current; must be ≥1.2V above OUT to maintain regulation |
| OUT (Pin 2) | Power Output / Thermal Pad | Delivers programmed current; exposed tab is electrically and thermally tied to this pin |
| SET (Pin 1) | Reference Current Source | Sinks precise 10µA ±1%; voltage across RSET sets operating point for current amplifier |
Key Features
| Feature | Design Value |
|---|---|
| 2-Terminal Operation | Enables series insertion into signal lines without ground reference-ideal for loop-powered sensors and intrinsically safe barriers |
| No Capacitor Requirement | Stable operation without input/output bypass caps reduces BOM count and avoids ESR-related instability in harsh environments |
| Reverse-Voltage Protection | Withstands –40V on IN relative to OUT-prevents damage during battery reversal or supply faults |
| Kelvin-Sensed Regulation | Current regulation measured at package terminals ensures accuracy independent of PCB trace resistance |
| Thermal Shutdown with Hysteresis | Protects against sustained overload; automatic recovery after cooling prevents latch-up in intermittent fault conditions |
Applications
| 4–20mA Current Loop Transmitter | Remote Sensor Biasing |
|---|---|
Use Scenario: Provides precise, temperature-stable 4–20mA output in field-mounted process transmitters powered via two-wire loop. IC Role / Device Role / Timing Role: Acts as floating, GND-referred current source regulating loop current based on sensor signal and DAC output. Use Value: Enables single-supply, loop-powered design with <10ppm/V line regulation and no external capacitors-reducing failure points in hazardous areas. | Use Scenario: Supplies stable bias current to RTDs, strain gauges, or MEMS pressure sensors located meters from controller PCB. IC Role / Device Role / Timing Role: Functions as 2-terminal current source inserted directly in sensor return path, eliminating need for local ground reference. Use Value: Delivers 0.5–200mA with ±1% initial accuracy and <0.001%/V line regulation-minimizing measurement drift due to supply ripple or cable drop. |
| Intrinsic Safety Barrier | Precision Local Current Limiter |
Use Scenario: Limits fault current in Ex-i certified equipment to prevent ignition energy in explosive atmospheres per IEC 60079-11. IC Role / Device Role / Timing Role: Serves as passive, capacitor-free current limiter in barrier module, placed in series with signal/power lines entering hazardous zone. Use Value: Guarantees ≤200mA short-circuit current with reverse-voltage protection and indefinite short-circuit tolerance-meeting energy storage limits for Class I Div 1. | Use Scenario: Protects downstream analog front-ends (e.g., ADC drivers, op-amp inputs) from overcurrent during transient faults or miswiring. IC Role / Device Role / Timing Role: Configured as in-line current limiter with fixed 100mA output, placed between LDO and sensitive circuitry. Use Value: Provides fast-acting, self-resetting current limit (<10ms response) without external sense resistors or control logic-reducing component count and board space. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 2-terminal current source applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT3092EST#TRPBF | Same architecture and pinout; rated for –40°C to 125°C (vs. –55°C to 125°C for MP grade) | Not qualified for extended cold-start environments (e.g., aerospace, polar instrumentation) | Select when full MP-grade temperature range is unnecessary and cost optimization is prioritized |
| LM334Z/NOPB | 3-terminal device requiring external bias; 1µA–10mA range; no reverse-protection or thermal shutdown | Lacks integrated protection and wide output range; requires additional components for robustness | Choose only for low-current, cost-sensitive designs where protection and extended temp range are not required |
Compared with LT3092EST#TRPBF, the LT3092MPST#TRPBF offers verified operation down to –55°C and tighter initial SET current tolerance; versus LM334Z/NOPB, it provides 20× higher output current, built-in fault protection, and true 2-terminal simplicity-reducing design risk in safety-critical and industrial deployments.
Availability
LT3092MPST#TRPBF is available at Aetrix Electronics and suitable for industrial instrumentation, aerospace sensor interfaces, and intrinsic safety barrier modules requiring stable component supply across extreme temperature cycles and long production lifecycles.
Supply support for LT3092MPST#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, Inc. is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control.
The LT3092 product line was designed specifically for rugged, capacitor-free current sourcing in safety-critical and remote sensing applications-emphasizing reliability, wide temperature operation, and intrinsic safety compliance.
FAQ
What is the minimum load current required for LT3092MPST#TRPBF to regulate properly?
The LT3092MPST#TRPBF requires a minimum load current of 0.5mA to maintain regulation. Below this threshold, the device exits regulation mode and output current becomes undefined. This value is specified in the Electrical Characteristics table under "Minimum Load Current" and is independent of input voltage within the 1.2V–40V range. The LT3092MPST#TRPBF achieves this with its internal 10µA SET pin current and precision error amplifier architecture.
Does LT3092MPST#TRPBF require input or output capacitors for stability?
No, the LT3092MPST#TRPBF is inherently stable without input or output capacitors due to its high-impedance architecture and internal compensation. This is confirmed in the datasheet's Features and Applications Information sections. However, if a capacitor is added across RSET for noise reduction or if long PCB traces introduce inductance, external RC compensation may be needed. The LT3092MPST#TRPBF's capacitor-free operation simplifies design in intrinsically safe and space-constrained applications.
How is output current programmed on LT3092MPST#TRPBF?
Output current on the LT3092MPST#TRPBF is programmed using two external resistors: RSET connected between SET and OUT, and ROUT connected between OUT and load. The 10µA current from the SET pin develops a voltage across RSET, which is applied to the error amplifier's noninverting input. The resulting output current is IOUT = (10µA × RSET) / ROUT + 10µA. The LT3092MPST#TRPBF datasheet Figure 1 and Applications Information section provide exact calculation guidance and resistor selection criteria.
What protection features does LT3092MPST#TRPBF include?
The LT3092MPST#TRPBF integrates reverse-voltage protection (±40V on IN relative to OUT), reverse-current protection, current limiting (200mA typical), and thermal shutdown with hysteresis. These features are implemented in silicon and do not require external components. The reverse-protection diodes and thermal foldback are active across the full –55°C to 125°C operating range, making the LT3092MPST#TRPBF suitable for unattended or mission-critical systems where supply faults or overheating may occur.
Is LT3092MPST#TRPBF pin-compatible with other LT3092 variants?
Yes, the LT3092MPST#TRPBF shares identical pinout and footprint with all LT3092 SOT-223 variants (e.g., LT3092EST#TRPBF, LT3092IST#TRPBF). All ST-package versions use the same 3-lead configuration: IN (Pin 3), OUT (Pin 2), SET (Pin 1), with the exposed tab electrically tied to OUT. This allows direct substitution in existing layouts when upgrading to the MP-grade temperature range, provided thermal and reliability validation is performed for the target application environment.
LT3092MPST#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- TO-261-4, TO-261AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Current Source
- Sensing Method:
- -
- Accuracy:
- ±1%
- Voltage - Input:
- 1.2V ~ 40V
- Current - Output:
- 200mA
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-3
LT3092MPST#TRPBF FAQ
1.How can I place an order for LT3092MPST#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3092MPST#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 LT3092MPST#TRPBF reliable?
The price and inventory of LT3092MPST#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3092MPST#TRPBF is usually 5 days.
3.What payment methods are accepted for LT3092MPST#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3092MPST#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3092MPST#TRPBF?
LT3092MPST#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3092MPST#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 LT3092MPST#TRPBF?
For technical support, including LT3092MPST#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3092MPST#TRPBF requirements.
6.How does Aetrix verify that LT3092MPST#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT3092MPST#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 LT3092MPST#TRPBF meets industry standards.
7.What is the process for return or replacement of LT3092MPST#TRPBF?
All LT3092MPST#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3092MPST#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 LT3092MPST#TRPBF part is unused and in its original packaging.
Return procedure for LT3092MPST#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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