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Analog Devices Inc. LT3015EMSE-3#PBF
- Part No.:
- LT3015EMSE-3#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-TSSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT3015EMSE-3#PBF.pdf
- Description:
- IC REG LINEAR -3V 1.5A 12MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:111
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Product details
Overview
LT3015EMSE-3#PBF from Analog Devices (formerly Linear Technology) is a fixed-output, negative low-dropout linear regulator delivering –3V at up to 1.5A with 310mV typical dropout voltage, 60µVRMS output noise (10Hz–100kHz), and <1µA shutdown quiescent current. It serves as a precision post-regulator in bipolar power supplies for instrumentation and industrial control systems.
For engineers reviewing the LT3015EMSE-3#PBF datasheet, LT3015EMSE-3#PBF pinout, LT3015EMSE-3#PBF application, or LT3015EMSE-3#PBF equivalent, key selection criteria include guaranteed –3V output accuracy over –40°C to 125°C, thermal-hysteresis protection, reverse output protection, and compatibility with 10µF ceramic output capacitors without ESR requirements.
Technical Context
The LT3015EMSE-3#PBF implements a precision bandgap reference and high-gain error amplifier to maintain stable –3V regulation across input voltages from –1.8V to –30V. Its internal foldback current limit activates when |VIN – VOUT| ≥ 8V, preventing thermal runaway during overvoltage or short-circuit conditions.
Quiescent current remains tightly controlled in dropout (≤2.5mA at –1.5A load), and shutdown logic accepts both positive and negative thresholds (–1.34V to –0.5V off-to-on). The device achieves fast transient response via optimized internal compensation, requiring no external components beyond input/output capacitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed –3.0V, ±2% tolerance over full temperature and load range ensures stable biasing for op-amps and ADCs. |
| Max Output Current | 1.5A continuous, enabling use in high-current analog subsystems without external pass devices. |
| Dropout Voltage | 310mV typical at 1.5A (DFN/MSOP package), allowing operation with minimal headroom-e.g., –3.31V input sustains –3V output. |
| Output Noise | 60µVRMS (10Hz–100kHz), critical for low-noise signal chains in precision data acquisition. |
| Quiescent Current | 1.1mA typical active, <1µA in shutdown-supports battery-backed or ultra-low-power standby modes. |
| Input Voltage Range | –1.8V to –30V, compatible with standard negative rails from –3.3V to –24V industrial supplies. |
| Thermal Protection | Hysteresis-enabled thermal limit shuts down above 125°C junction and restarts only after cooling by ≥15°C. |
Pinout & Package
LT3015EMSE-3#PBF uses a thermally enhanced 12-lead MSOP package (3mm × 3mm, 0.75mm height) with exposed IN pad soldered to PCB for optimal thermal performance (θJA = 37°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 12 | IN | Input supply connection; all five pins tied internally and to exposed pad-must be soldered to large copper area for thermal management. |
| 5 | SHDN | Active-low shutdown control; pulls device into <1µA state when driven ≤ –0.5V (negative logic) or ≤ 0.73V (positive logic). |
| 6, 7, 8, 9, 10, 11 | OUT | Regulated –3V output; six parallel pins reduce IR drop and improve current handling for 1.5A loads. |
| 13 | GND | Ground reference for internal circuitry and feedback; separate from IN/OUT paths to minimize noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Stable with 10µF ceramic capacitor | Eliminates need for high-ESR tantalum or aluminum electrolytics-reduces board space and improves reliability. |
| Precision current limit with foldback | Reduces output current to ~0.5A when |VIN – VOUT| ≥ 8V, preventing thermal damage during fault conditions. |
| Reverse output protection | Blocks reverse current flow from OUT to IN during power sequencing or fault events-protects upstream supplies. |
| Controlled quiescent current in dropout | Maintains ≤2.5mA GND current even when VIN approaches VOUT, ensuring predictable thermal behavior. |
| Low noise architecture | 60µVRMS noise enables direct powering of sensitive analog circuits without additional LDO filtering stages. |
Applications
| Industrial Process Control | Precision Data Acquisition |
|---|---|
Use Scenario: Powering dual-supply op-amps and analog front-ends in PLC I/O modules operating from –24V rails. IC Role / Device Role / Timing Role: Negative post-regulator providing clean –3V bias for signal conditioning circuitry. Use Value: 60µVRMS noise and 0.05% line/load regulation prevent offset drift and gain errors in 16-bit ADC references. | Use Scenario: Supplying low-noise bias to instrumentation amplifiers in portable multimeters and sensor interfaces. IC Role / Device Role / Timing Role: Fixed-output negative LDO delivering stable –3V for precision analog signal paths. Use Value: Stable 10µF ceramic compatibility simplifies layout and avoids aging-related ESR degradation in field-deployed equipment. |
| Bipolar Audio Systems | Test & Measurement Equipment |
Use Scenario: Generating symmetric –3V rail alongside +3V for Class-AB audio op-amp stages in benchtop analyzers. IC Role / Device Role / Timing Role: Low-noise negative regulator supporting rail-to-rail input/output op-amps. Use Value: Fast transient response (<10µs) suppresses supply-induced distortion during dynamic audio signal transients. | Use Scenario: Providing regulated –3V to DAC reference buffers and clock distribution ICs in automated test systems. IC Role / Device Role / Timing Role: Precision voltage source for analog subsystems requiring tight DC accuracy and low ripple. Use Value: ±2% output tolerance and <1µA shutdown current enable accurate calibration retention during idle periods. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar negative linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3015EMSE-3#PBF | Same die, identical electrical specs and pinout-rebranded part after Analog Devices acquisition of Linear Technology. | No functional difference; fully interchangeable in existing designs and BOMs. | Select when sourcing from distributors listing LTC-branded stock or requiring updated documentation alignment. |
| LT3015IMSE-3#PBF | Identical functionality and pinout; differs only in temperature grade (–40°C to 125°C vs. E-grade's same range-no spec delta). | No application impact; both qualified for industrial environments with identical derating curves. | Choose based on lot traceability or qualification documentation requirements-not electrical performance. |
Compared with LT3015EMSE-3#PBF, the LTC3015EMSE-3#PBF offers identical performance and drop-in compatibility, while the LT3015IMSE-3#PBF provides identical electrical behavior with alternate qualification reporting-neither requires layout changes or design revalidation.
Availability
LT3015EMSE-3#PBF is available at Aetrix Electronics and suitable for industrial process control, precision data acquisition, bipolar audio systems, and test & measurement equipment requiring stable component supply across extended temperature ranges.
Supply support for LT3015EMSE-3#PBF 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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, formed through the acquisition of Linear Technology in 2017.
The LT3015 series belongs to ADI's precision power management portfolio, designed specifically for noise-sensitive analog systems requiring robust negative regulation with minimal external components and guaranteed thermal safety.
FAQ
What is the output voltage tolerance of the LT3015EMSE-3#PBF over temperature and load?
The LT3015EMSE-3#PBF delivers –3.0V with ±2% output voltage tolerance across –40°C to 125°C junction temperature and full load range (–1mA to –1.5A). This is verified per Electrical Characteristics table on page 5 of the datasheet, where min/max values are –2.94V and –3.06V under specified conditions.
Does the LT3015EMSE-3#PBF require an external resistor divider for output setting?
No, the LT3015EMSE-3#PBF is a fixed-output variant and does not require an external resistor divider. Its –3V output is internally trimmed; only the adjustable LT3015 (without suffix) uses the ADJ pin and external feedback network. Pin 8 on the MSOP package is SENSE-not ADJ-for this part.
What is the minimum input voltage required for the LT3015EMSE-3#PBF to regulate at 1.5A?
The LT3015EMSE-3#PBF requires a minimum input voltage of –3.5V to sustain –3V output at –1.5A load, based on its 310mV typical dropout voltage. At higher temperatures or worst-case process corners, the guaranteed dropout is 410mV, so –3.41V input is the absolute minimum for full-spec operation.
Can the LT3015EMSE-3#PBF be used with ceramic output capacitors smaller than 10µF?
No-the LT3015EMSE-3#PBF is only guaranteed stable with ≥10µF output capacitance, as stated in the datasheet "Stable with 10µF Output Capacitor" feature. Using smaller ceramics risks instability and oscillation due to insufficient phase margin; 10µF X7R or X5R ceramics are recommended.
How does the shutdown function work on the LT3015EMSE-3#PBF?
The LT3015EMSE-3#PBF supports dual-mode shutdown: it turns off when SHDN is pulled ≤ –0.5V (negative logic) or ≤ 0.73V (positive logic), and turns on when SHDN rises ≥ –1.2V (negative) or ≥ 1.07V (positive). This allows flexible interface with either microcontroller GPIO or dedicated negative logic supervisors.
LT3015EMSE-3#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 12-TSSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Output Configuration:
- Negative
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- -30V
- Voltage - Output (Min/Fixed):
- -3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.5V @ 1.5A
- Current - Output:
- 1.5A
- Current - Quiescent (Iq):
- 2.4 mA
- Current - Supply (Max):
- 70 mA
- PSRR:
- 62dB (120Hz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-MSOP-EP
LT3015EMSE-3#PBF FAQ
1.How can I place an order for LT3015EMSE-3#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3015EMSE-3#PBF 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 LT3015EMSE-3#PBF reliable?
The price and inventory of LT3015EMSE-3#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3015EMSE-3#PBF is usually 5 days.
3.What payment methods are accepted for LT3015EMSE-3#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3015EMSE-3#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3015EMSE-3#PBF?
LT3015EMSE-3#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3015EMSE-3#PBF 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 LT3015EMSE-3#PBF?
For technical support, including LT3015EMSE-3#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3015EMSE-3#PBF requirements.
6.How does Aetrix verify that LT3015EMSE-3#PBF is sourced from the original manufacturer or authorized distributors?
All LT3015EMSE-3#PBF 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 LT3015EMSE-3#PBF meets industry standards.
7.What is the process for return or replacement of LT3015EMSE-3#PBF?
All LT3015EMSE-3#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3015EMSE-3#PBF, 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 LT3015EMSE-3#PBF part is unused and in its original packaging.
Return procedure for LT3015EMSE-3#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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