LM25085SD/NOPB Texas Instruments Integrated Circuit (Small Outline No-lead) In Stock
LM25085SD/NOPB is a wide-input constant on-time non-synchronous PFET buck controller from Texas Instruments in an 8-pin SON package. It operates over a 4.5 V to 42 V input range using voltage-mode control for simple loop compensation. Available globally in a compact Pb-free package for industrial and automotive DC-DC step-down designs.
- Manufacturer
- Texas Instruments
- Package
- Small Outline No-lead
- Pin Count
- 9
- Lifecycle
- ACTIVE
- Datasheet
- LM25085SD/NOPB Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.1900(MOQ 1000)
- 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 LM25085SD/NOPB?
- Wide 4.5 V to 42 V input range supporting 12 V, 24 V, and 36 V industrial power buses
- Constant on-time voltage-mode control eliminates need for current sensing resistors and simplifies compensation
- External PFET switch supports high-side drive for non-synchronous buck topologies up to high current
- 8-pin SON (WSON) package in Pb-free construction for compact SMT PCB assembly
What is LM25085SD/NOPB used for?
LM25085SD/NOPB is used as the control IC in non-synchronous buck converters powering 3.3 V and 5 V rails from 12 V to 42 V industrial, telecom, and automotive power inputs. Its constant on-time architecture eliminates current-sense resistors and simplifies loop compensation, making it favored in point-of-load converters for PLC backplanes, industrial sensors, and 24 V factory automation equipment. The wide input range also makes it suitable for solar-powered remote monitoring systems and off-grid DC distribution panels where bus voltage can vary widely.
What are the specifications of LM25085SD/NOPB?
| Pbfree Code | Yes |
| YTEOL | 15 |
| Analog IC - Other Type | SWITCHING CONTROLLER |
| Control Mode | VOLTAGE-MODE |
| Control Technique | CONSTANT ON TIME |
| Input Voltage-Max | 42V |
| Input Voltage-Min | 4.5V |
| Input Voltage-Nom | 24V |
| JESD-30 Code | S-PDSO-N8 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Output Current-Max | 10A |
| Output Voltage-Max | 42V |
| Output Voltage-Min | 1.25V |
| 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) | 260 |
| Qualification Status | Not Qualified |
| Surface Mount | YES |
| Switcher Configuration | BUCK |
| Switching Frequency-Max | 1000kHz |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline No-lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Where can I find the LM25085SD/NOPB datasheet?
LM25085SD/NOPB Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for LM25085SD/NOPB?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What input voltage range does LM25085SD/NOPB support and which power bus voltages is it compatible with?
LM25085SD/NOPB operates from a minimum input of 4.5 V to a maximum of 42 V, covering standard 5 V, 12 V, 24 V, and 36 V industrial and automotive power buses. This wide range allows a single design to serve both 12 V automotive systems and 24 V to 36 V industrial machinery without redesigning the power stage.
How does constant on-time control in LM25085SD/NOPB simplify loop compensation compared to peak-current-mode controllers?
Constant on-time (COT) control in LM25085SD/NOPB eliminates the need for a current-sensing resistor or transformer in the switching loop, reducing power loss and BOM cost. The COT architecture also simplifies output filter design because the control loop does not require complex Type-III compensation networks, allowing a simple RC or LC output filter to stabilize the converter across the full 4.5 V to 42 V input range.
What type of switch does LM25085SD/NOPB require, and what current level can a typical design support?
LM25085SD/NOPB drives an external high-side P-channel MOSFET (PFET), which conducts when the gate is pulled low by the controller. The output current is limited only by the selected PFET's on-resistance and thermal rating. A standard 40 V PFET such as a 20 mΩ device can support load currents of 5 A to 10 A in a well-designed buck converter powered from a 24 V bus.
In a 24 V industrial sensor supply design, how does LM25085SD/NOPB compare to a synchronous buck controller?
For light-to-medium loads below 5 A on a 24 V rail, LM25085SD/NOPB offers simpler implementation by using a single PFET and a freewheeling Schottky diode, eliminating the synchronous NFET and its gate-drive circuitry. A synchronous controller achieves higher efficiency above 5 A due to lower diode conduction losses, but LM25085SD/NOPB lowers component count and PCB area by up to 30 % for lower-current industrial sensor nodes.
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Why Buy from FindMyChip
About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1000+ | $1.2600 | $1260.00 |
| 2000+ | $1.2100 | $2420.00 |
| 5000+ | $1.1900 | $5950.00 |
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