LM5085SD Texas Instruments Integrated Circuit (Other) In Stock
Texas Instruments LM5085SD is a constant on-time PFET buck switching controller supporting 4.5 V to 75 V input range. It operates in fixed 200 kHz or adjustable frequency mode down to 1.25 V output. Designed for industrial and telecom power supplies in an SO-8 package.
- Manufacturer
- Texas Instruments
- Package
- Other
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- LM5085SD Datasheet PDF
- Category
- Integrated Circuit
- 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 LM5085SD?
- Wide 4.5 V to 75 V input voltage range supports 12 V, 24 V, and 48 V bus designs
- Constant on-time control for fast transient response without external compensation
- Adjustable output voltage down to 1.25 V via external resistor divider
- Integrated PFET gate driver eliminates external switch
- Fixed 200 kHz switching frequency reduces EMI and filter size
- SO-8 package in small 8-pin footprint for compact power stage layouts
What is LM5085SD used for?
The LM5085SD is well suited for industrial power systems, telecom equipment, and distributed power architectures where a high input voltage must be stepped down efficiently. Its wide 4.5 V–75 V input range makes it ideal for 24 V and 48 V bus converters found in factory automation and communications infrastructure. The device is also used in automotive accessories and medical instrument power stages requiring reliable voltage regulation.
What are the specifications of LM5085SD?
| YTEOL | 0 |
| Additional Feature | ALSO OPRERATES IN ADJUSTABLE MODE FROM 1.25V |
| Analog IC - Other Type | SWITCHING REGULATOR |
| Control Mode | VOLTAGE-MODE |
| Control Technique | CONSTANT ON TIME |
| Input Voltage-Max | 75V |
| Input Voltage-Min | 4.5V |
| Input Voltage-Nom | 48V |
| JESD-30 Code | S-XDSO-N8 |
| Number of Functions | 1 |
| Output Current-Max | 1.75A |
| Package Body Material | UNSPECIFIED |
| Package Shape | SQUARE |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE |
| Qualification Status | Not Qualified |
| Surface Mount | YES |
| Switcher Configuration | BUCK |
| Switching Frequency-Max | 1000kHz |
| Temperature Grade | AUTOMOTIVE |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | DUAL |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Where can I find the LM5085SD datasheet?
LM5085SD Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for LM5085SD?
Compatible alternatives and drop-in replacements for LM5085SD:
Switching Controller, Voltage-mode, 10A, 1000kHz Switching Freq-Max, PDSO8
Frequently Asked Questions
What input voltage range does the LM5085SD support, and which bus standards does that cover?
The LM5085SD accepts input voltages from 4.5 V to 75 V, covering 5 V, 12 V, 24 V, and 48 V bus standards widely used in industrial and telecom systems. This wide range makes it a single-device solution for multiple power architectures without redesign.
How does constant on-time control in the LM5085SD benefit designs compared to traditional PWM controllers?
Constant on-time control delivers inherently fast load transient response because duty cycle adjusts in one switching cycle without a compensator delay. At a nominal 200 kHz switching frequency, output ripple stays low and external filter components remain compact, reducing overall BOM cost.
When is the LM5085SD a better fit than a standard synchronous buck controller for a 48 V industrial supply?
For a 48 V rail stepping down to 3.3 V or 5 V, the LM5085SD's integrated PFET driver simplifies the design by eliminating a separate high-side switch gate driver IC. With an input rating of up to 75 V, it provides comfortable margin above a 48 V nominal bus and handles load transients up to several amperes without complex compensation.
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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.
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