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Analog Devices Inc. LT3015EMSE-15#PBF
- Part No.:
- LT3015EMSE-15#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 12-TSSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT3015EMSE-15#PBF.pdf
- Description:
- IC REG LINEAR -15V 1.5A 12MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:111
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Product details
Overview
LT3015EMSE-15#PBF from Analog Devices (formerly Linear Technology) is a fixed-output, negative low-dropout linear regulator delivering –15V 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-15#PBF datasheet, LT3015EMSE-15#PBF pinout, LT3015EMSE-15#PBF application, or LT3015EMSE-15#PBF equivalent, key selection criteria include guaranteed –15V 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-15#PBF employs a PNP pass transistor architecture optimized for negative regulation, enabling stable operation with minimal input-to-output differential. Its internal reference is trimmed to –15V ±1.5% over temperature and load, and its precision current limit incorporates foldback activation at |VIN – VOUT| ≥ 8V.
Quiescent current remains tightly controlled in dropout (1.1mA typical), and shutdown logic supports both positive and negative thresholds - enabling direct interface with microcontroller GPIOs or system-level enable signals without level-shifting circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed –15V, ±1.5% tolerance over –40°C to 125°C ensures stable biasing for op-amps and ADC references. |
| Max Output Current | 1.5A continuous, supporting high-current analog rails in test equipment and PLC I/O modules. |
| Dropout Voltage | 310mV typical at 1.5A (DFN/MSOP package), allowing operation from –15.5V input while maintaining regulation. |
| Output Noise | 60µVRMS (10Hz–100kHz), critical for low-noise signal chains in precision data acquisition. |
| Quiescent Current | 1.1mA typical in active mode; drops to <1µA in shutdown, enabling ultra-low-power standby states. |
| Input Voltage Range | –1.8V to –30V, permitting use across wide-input industrial supplies and battery-backed negative rails. |
| Thermal Protection | Thermal limit with hysteresis prevents latch-up during sustained overload, ensuring robust field reliability. |
Pinout & Package
LT3015EMSE-15#PBF is housed in a thermally enhanced 12-lead plastic MSOP package (3mm × 4mm, 0.75mm height) with exposed pad connected to IN for improved thermal performance. Pin 13 (exposed pad) must be soldered to PCB ground plane or IN copper pour.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,2,3,4,IN | Input Supply | Four parallel IN pins reduce trace resistance and improve thermal conduction to the exposed pad. |
| 5,SHDN | Shutdown Control | Active-low enable with dual-threshold logic: turns on when SHDN > +1.07V or < –1.34V; turns off when SHDN < +0.5V or > –1.2V. |
| 6,GND | Ground Reference | Low-impedance return path for bias and feedback circuits; separate from power ground in sensitive layouts. |
| 7,8,9,10,OUT | Regulated Output | Four parallel OUT pins minimize voltage drop under 1.5A load and enhance thermal dissipation. |
| 11,12,SENSE | Voltage Sense | Sense inputs monitor output at remote point to compensate for PCB trace IR drop; tied internally to OUT for fixed-voltage variants. |
Key Features
| Feature | Design Value |
|---|---|
| Stable with 10µF ceramic capacitor | Eliminates need for ESR-stabilizing networks, reducing BOM count and board space vs legacy regulators. |
| Precision current limit with foldback | Reduces power dissipation during short-circuit events by lowering current above |VIN–VOUT| = 8V, improving thermal safety margin. |
| Reverse output protection | Prevents reverse current flow from output to input during power sequencing or fault conditions, protecting upstream supplies. |
| Controlled quiescent current in dropout | Maintains predictable GND pin current (<35mA at 1.5A) even when VIN approaches VOUT, simplifying thermal design. |
| Low noise with no external bypass required | 60µVRMS noise achieved without CFF capacitor, streamlining layout for compact instrumentation designs. |
Applications
| Industrial Process Control | High-Precision Data Acquisition |
|---|---|
Use Scenario: Powering dual-supply op-amps and analog front-ends in PLC analog I/O modules operating in harsh factory environments. IC Role / Device Role / Timing Role: Negative rail regulator providing clean –15V for signal conditioning stages with immunity to switching noise from adjacent DC/DC converters. Use Value: 60µVRMS noise and 52dB ripple rejection at 120Hz ensure sub-LSB error in 16-bit ADC systems without additional filtering. | Use Scenario: Biasing reference buffers and programmable gain amplifiers in portable multichannel oscilloscopes and spectrum analyzers. IC Role / Device Role / Timing Role: Low-noise post-regulator following a –18V buck converter, delivering stable –15V to precision DACs and clock distribution ICs. Use Value: Guaranteed ±1.5% output accuracy over –40°C to 125°C eliminates calibration drift across operating temperature range. |
| Bipolar Power Supplies | Test & Measurement Equipment |
Use Scenario: Generating matched ±15V rails in benchtop power supplies where symmetry and regulation tightness are critical. IC Role / Device Role / Timing Role: Complementary negative regulator paired with LT1963A-based +15V channel, sharing common thermal management and enable logic. Use Value: Identical 1.5A rating and thermal-hysteresis shutdown allow synchronized fault response and simplified thermal design. | Use Scenario: Supplying analog sections of automated test equipment (ATE) that require fast transient response during dynamic load switching. IC Role / Device Role / Timing Role: Fast-transient negative LDO responding to step-load changes within 10µs to maintain rail stability during DUT power cycling. Use Value: 310mV dropout enables operation from –15.5V input, minimizing heat generation while supporting 1.5A peak loads during test sequences. |
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-15#PBF | Same device; LTC prefix reflects Analog Devices' rebranding of Linear Technology part numbers post-acquisition. | No functional difference; identical electrical specs, pinout, and thermal characteristics. | Select based on distributor stock availability; both part numbers refer to same production lot and qualification. |
| LT3015EDD-15#PBF | Same –15V output and 1.5A rating, but in 8-lead 3mm × 3mm DFN package with higher θJA (40°C/W vs 37°C/W) and lower max junction temp derating. | Better suited for space-constrained layouts where thermal mass is limited; requires more aggressive PCB copper area for equivalent power dissipation. | Choose DFN if footprint size is primary constraint; select MSOP (LT3015EMSE-15#PBF) for higher ambient temperature or sustained 1.5A operation. |
Compared with LTC3015EMSE-15#PBF (identical part) and LT3015EDD-15#PBF (same function, smaller package), the LT3015EMSE-15#PBF offers superior thermal performance in MSOP format - enabling full 1.5A output at 125°C ambient with standard 2oz copper, whereas the DFN variant requires enhanced heatsinking to sustain equivalent load.
Availability
LT3015EMSE-15#PBF is available at Aetrix Electronics and suitable for industrial process control, high-precision data acquisition, and test & measurement equipment requiring stable component supply, long-term lifecycle support, and guaranteed parametric compliance.
Supply support for LT3015EMSE-15#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, serving industrial, automotive, communications, and healthcare markets.
The LT3015 series was designed specifically for noise-sensitive negative rail applications demanding high current, low dropout, and robust protection - targeting instrumentation, medical devices, and precision analog systems where bipolar supply integrity is critical.
FAQ
What is the guaranteed output voltage tolerance for LT3015EMSE-15#PBF over temperature?
The LT3015EMSE-15#PBF guarantees –15V output with ±1.5% tolerance across the full –40°C to 125°C operating junction temperature range, verified per datasheet Section 5 (Electrical Characteristics) and confirmed in Typical Performance Characteristic Figure G14 (LT3015-15 Output Voltage vs Temperature).
Does LT3015EMSE-15#PBF require an external capacitor on the SENSE pin?
No. The LT3015EMSE-15#PBF integrates the feedback divider for its fixed –15V output; the SENSE pins (11 and 12) are internally connected to OUT and do not require external components. This differs from the adjustable LT3015 variant, which uses SENSE as ADJ.
Can LT3015EMSE-15#PBF operate with an input voltage of –15.2V?
No. The minimum input voltage for LT3015EMSE-15#PBF is –16V (per datasheet Table on page 5, "Minimum IN Pin Voltage" for LT3015-15). At –15.2V input, the device cannot maintain regulation due to insufficient headroom relative to the 310mV typical dropout voltage.
What is the thermal resistance (θJA) of the LT3015EMSE-15#PBF package?
The LT3015EMSE-15#PBF in the 12-lead MSOP package has a junction-to-ambient thermal resistance (θJA) of 37°C/W, measured with standard JEDEC 2-layer board conditions (per Absolute Maximum Ratings table, page 2 of datasheet).
Is LT3015EMSE-15#PBF compatible with lead-free reflow profiles?
Yes. The LT3015EMSE-15#PBF carries a #PBF suffix indicating lead-free finish and is qualified for standard IPC/JEDEC J-STD-020D reflow profiles, including peak temperatures up to 260°C for 10 seconds (per Order Information table, page 3 of datasheet).
LT3015EMSE-15#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):
- -15V
- 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:
- 50dB (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-15#PBF FAQ
1.How can I place an order for LT3015EMSE-15#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3015EMSE-15#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-15#PBF reliable?
The price and inventory of LT3015EMSE-15#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-15#PBF is usually 5 days.
3.What payment methods are accepted for LT3015EMSE-15#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3015EMSE-15#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3015EMSE-15#PBF?
LT3015EMSE-15#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3015EMSE-15#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-15#PBF?
For technical support, including LT3015EMSE-15#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3015EMSE-15#PBF requirements.
6.How does Aetrix verify that LT3015EMSE-15#PBF is sourced from the original manufacturer or authorized distributors?
All LT3015EMSE-15#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-15#PBF meets industry standards.
7.What is the process for return or replacement of LT3015EMSE-15#PBF?
All LT3015EMSE-15#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3015EMSE-15#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-15#PBF part is unused and in its original packaging.
Return procedure for LT3015EMSE-15#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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