SM72485MM/NOPB Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Wide input range current-mode step-down DC-DC switching regulator accepting 6 V to 95 V input and delivering a fixed 2.5 V output at up to 150 mA in an 8-pin VSSOP package. Nominally designed for 48 V solar and industrial supply rails, providing a regulated auxiliary bias supply from high-voltage bus. Suitable for solar panel maximum power point tracking systems, 48 V telecom rails, and high-voltage industrial equipment bias supplies.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- SM72485MM/NOPB Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $2.4900(MOQ 1000)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Wide 6 V to 95 V input range for high-voltage bus applications
- Current-mode control for fast transient response
- Fixed 2.5 V output at 150 mA for bias supply generation
- Nominal 48 V input optimization for solar and telecom rails
- Compact 8-pin VSSOP package
- Single-channel step-down switching regulator
- Pb-free JESD-609 e3 compliant
Applications
The SM72485MM/NOPB generates a regulated 2.5 V bias supply directly from high-voltage 48 V or up to 95 V solar panel bus rails in maximum power point tracking inverters, eliminating the need for a separate auxiliary transformer. Telecom equipment and 48 V distributed power architectures use it to derive low-power logic supply voltages from the main bus with minimal external components. Industrial controllers, motor drive gate power supplies, and high-voltage test equipment also employ it as a compact wide-input auxiliary regulator.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Analog IC - Other Type | SWITCHING REGULATOR |
| Control Mode | CURRENT MODE |
| Input Voltage-Max | 95V |
| Input Voltage-Min | 6V |
| Input Voltage-Nom | 48V |
| JESD-30 Code | S-PDSO-G8 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Output Current-Max | 0.15A |
| Output Voltage-Max | 85V |
| Output Voltage-Min | 2.5V |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | SQUARE |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Surface Mount | YES |
| Switcher Configuration | BUCK |
| Switching Frequency-Max | 600kHz |
| Technology | BICMOS |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does SM72485MM/NOPB's 6 V to 95 V input range enable direct biasing from a solar panel string without an isolation transformer?
The 95 V maximum input allows the SM72485MM/NOPB to connect directly across a solar panel string or 48 V bus and produce a stable 2.5 V at 150 mA, supplying microcontroller and gate drive bias circuits without requiring a separate isolated flyback converter or auxiliary winding on the main transformer.
What current-mode control architecture does SM72485MM/NOPB use, and how does it improve transient response in variable-input systems?
Current-mode control senses the inductor current on a cycle-by-cycle basis, providing inherent feedforward rejection of input voltage variations from 6 V to 95 V, so the 2.5 V output recovers within microseconds from load steps without the sluggish response typical of voltage-mode regulators on wide-input supplies.
For a 48 V telecom rack unit needing a 2.5 V auxiliary rail at 100 mA, what external components does SM72485MM/NOPB require?
A typical SM72485MM/NOPB application circuit requires an input filter capacitor, an output inductor in the range of 10 µH to 47 µH, an output capacitor of 10 µF to 100 µF, a freewheeling diode, and a few feedback resistors, fitting the complete 2.5 V auxiliary supply onto a PCB area of approximately 1 cm² around the 8-pin VSSOP package.
How does SM72485MM/NOPB compare to a linear regulator for generating 2.5 V from a 48 V bus in terms of power dissipation?
A linear regulator dropping from 48 V to 2.5 V at 150 mA would dissipate approximately 6.8 W as heat, requiring a large heatsink, whereas the SM72485MM/NOPB step-down switching regulator achieves efficiencies above 80%, dissipating less than 0.5 W in the 8-pin VSSOP package without any additional thermal management.
Related Guides
How to Choose a Panasonic FT SMD Aluminum Electrolytic Capacitor for 35 V Control Rails
Selection guide for EEEFT1V101AP and related Panasonic FT/FK SMD aluminum electrolytic capacitors on 35 V and lower control rails.
Jul 8, 2026
EEEFK1E470P Design Guide for 24 V Control-Board Hold-Up
Design EEEFK1E470P into 12 V and 24 V control boards with correct voltage derating, ripple checks, layout, and sourcing alternatives.
Jul 8, 2026
EEEFK1E470P Selection Guide for 47 uF SMD Aluminum Electrolytic Capacitors
Selection guidance for EEEFK1E470P and nearby Panasonic FK or FT SMD aluminum electrolytic capacitors for power-rail bulk decoupling.
Jul 7, 2026
EEEFT1V101AP Design Guide for SMD Aluminum Electrolytic Bulk Decoupling
Design guidance for using EEEFT1V101AP as an SMD aluminum electrolytic bulk capacitor in power-rail decoupling and hold-up networks.
Jul 7, 2026
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.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1000+ | $2.5200 | $2520.00 |
| 2000+ | $2.4900 | $4980.00 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Their engineering team helped us find a pin-compatible alternative when our original MCU went EOL.”