L5987TR STMicroelectronics Integrated Circuit (Small Outline No-lead) In Stock
STMicroelectronics L5987TR is a 3 A voltage-mode PWM step-down switching regulator with an input range of 2.9 V to 18 V and adjustable output from 0.6 V to 18 V in a compact 8-pin SOIC-N package. Achieves high efficiency across a broad load range for industrial and consumer applications. Available from stock with worldwide shipping.
- Manufacturer
- STMicroelectronics
- Package
- Small Outline No-lead
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- L5987TR Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.2222(MOQ 100)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of L5987TR?
- 3 A continuous output current with input voltage range of 2.9 V to 18 V covering a wide variety of power supply architectures
- Adjustable output voltage from 0.6 V to 18 V via external resistor divider for flexible point-of-load regulation
- Voltage-mode PWM control with internally compensated loop enables simple external component selection
- Integrated high-side MOSFET and bootstrap gate driver in compact 8-pin SOIC-N package for space-constrained designs
- Programmable soft-start and hiccup current limit protection for robust operation in industrial and automotive environments
What is L5987TR used for?
The L5987TR is well suited for industrial power supplies, programmable logic controller (PLC) input modules, and IoT gateway boards that require regulated point-of-load voltages from a 12 V or 24 V input bus down to 0.6 V at up to 3 A. Its wide input range of 2.9 V to 18 V and adjustable output make it equally useful in battery-powered portable instruments and smart home devices where input voltage varies with battery state. The compact 8-pin SOIC-N footprint and minimal external component count simplify PCB layout in space-constrained embedded system designs.
What are the specifications of L5987TR?
| Factory Lead Time | 16Weeks |
| YTEOL | 7.7 |
| Additional Feature | ALSO OPERATES IN ADJUSTABLE MODE FROM 0.6V TO 18V |
| Analog IC - Other Type | SWITCHING REGULATOR |
| Control Mode | VOLTAGE-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 18V |
| Input Voltage-Min | 2.9V |
| Input Voltage-Nom | 12V |
| JESD-30 Code | S-PDSO-N8 |
| Number of Functions | 1 |
| Output Current-Max | 4.4A |
| Output Voltage-Min | 3V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOLCC8,.11,20 |
| Package Shape | SQUARE |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| Qualification Status | Not Qualified |
| Supply Current-Max (Isup) | 25mA |
| Surface Mount | YES |
| Switcher Configuration | BUCK |
| Switching Frequency-Max | 1000kHz |
| Temperature Grade | AUTOMOTIVE |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| Package | Small Outline No-lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Philippines |
Where can I find the L5987TR datasheet?
L5987TR Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for L5987TR?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the output current capability and input voltage range of the L5987TR switching regulator?
The L5987TR provides up to 3 A of continuous output current from an input voltage range of 2.9 V to 18 V, making it capable of powering a 3.3 V rail from a 12 V bus or a 5 V rail from a 7.4 V lithium battery pack. This versatility covers a broad range of industrial, consumer, and embedded system power supply requirements without needing multiple regulator variants.
How is the output voltage of the L5987TR configured, and what is the minimum achievable output?
The L5987TR output voltage is set by an external resistor divider connected to the feedback pin, with a reference voltage of 0.6 V at the feedback node. This means the adjustable output can be programmed as low as 0.6 V and up to 18 V, covering core voltages for modern DSPs and FPGAs at 1.0 V as well as standard 12 V rails in the same design.
For a 12 V to 3.3 V conversion at 2 A, what efficiency advantage does the L5987TR offer over a linear regulator?
Replacing a linear regulator with the L5987TR for a 12 V to 3.3 V, 2 A conversion reduces power dissipation from approximately 17.4 W down to under 1 W, since the PWM switching regulator achieves over 90% efficiency at this operating point. This difference eliminates the need for a heatsink, reduces PCB thermal management complexity, and improves overall system efficiency in 3.3 V point-of-load applications.
What protection features does the L5987TR include to handle overcurrent faults in industrial equipment?
The L5987TR includes a hiccup-mode overcurrent protection that limits peak inductor current and cycles through a soft-start sequence after a fault, preventing sustained thermal stress on the 3 A rated internal MOSFET. It also incorporates thermal shutdown at approximately 150 °C junction temperature, ensuring the regulator recovers automatically once the fault is removed without requiring a manual reset in unattended industrial installations.
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Why Buy from FindMyChip
About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 100+ | $1.6176 | $161.76 |
| 250+ | $1.5286 | $382.16 |
| 500+ | $1.4400 | $720.00 |
| 1000+ | $1.3600 | $1360.00 |
| 4000+ | $1.2600 | $5040.00 |
| 16000+ | $1.2222 | $19555.20 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
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