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WSON (NGU)
Integrated Circuits (ICs)

SM72485SD/NOPB

Active
Texas Instruments

100V, 150 MA CONSTANT ON-TIME BUCK SWITCHING REGULATOR

Deep-Dive with AI

Search across all available documentation for this part.

DocumentsAN-2122 SM3320-RF-EV Reference Design (Rev. E)SM3320-BATT-EV Charge Controller Reference Design (Rev. C)+1
WSON (NGU)
Integrated Circuits (ICs)

SM72485SD/NOPB

Active
Texas Instruments

100V, 150 MA CONSTANT ON-TIME BUCK SWITCHING REGULATOR

Deep-Dive with AI

DocumentsAN-2122 SM3320-RF-EV Reference Design (Rev. E)SM3320-BATT-EV Charge Controller Reference Design (Rev. C)+1

Technical Specifications

Parameters and characteristics for this part

SpecificationSM72485SD/NOPB
Current - Output150 mA
Frequency - Switching [Max]1.1 MHz
Frequency - Switching [Min]50 kHz
FunctionStep-Down
Mounting TypeSurface Mount
Number of Outputs1
Operating Temperature [Max]125 ¯C
Operating Temperature [Min]-40 °C
Output ConfigurationPositive
Output TypeAdjustable
Package / Case8-WDFN Exposed Pad
Supplier Device Package8-WSON (4x4)
Synchronous RectifierFalse
TopologyBuck
Voltage - Input (Max) [Max]95 V
Voltage - Input (Min) [Min]6 V
Voltage - Output (Max) [Max]85 V
Voltage - Output (Min/Fixed)2.5 V

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

DistributorPackageQuantity$
DigikeyTape & Reel (TR) 1000$ 1.67
Texas InstrumentsSMALL T&R 1$ 2.99
100$ 2.47
250$ 1.77
1000$ 1.33

Description

General part information

SM72485 Series

The SM72485 step-down switching regulator features all of the functions required to implement a low cost, efficient, Buck bias regulator. This high voltage regulator contains an 100-V N-channel buck switch. The device is easy to implement and is provided in the VSSOP and the thermally enhanced WSON package. The regulator is based on a control scheme using an on-time inversely proportional to VIN. This feature allows the operating frequency to remain relatively constant. The control scheme requires no loop compensation. An intelligent current limit is implemented with forced off-time, which is inversely proportional to VOUT. This scheme ensures short circuit control while providing minimum foldback. Other features include: Thermal shutdown, VCCundervoltage lockout, gate drive undervoltage lockout, maximum duty cycle limiter, and a precharge switch.

The SM72485 step-down switching regulator features all of the functions required to implement a low cost, efficient, Buck bias regulator. This high voltage regulator contains an 100-V N-channel buck switch. The device is easy to implement and is provided in the VSSOP and the thermally enhanced WSON package. The regulator is based on a control scheme using an on-time inversely proportional to VIN. This feature allows the operating frequency to remain relatively constant. The control scheme requires no loop compensation. An intelligent current limit is implemented with forced off-time, which is inversely proportional to VOUT. This scheme ensures short circuit control while providing minimum foldback. Other features include: Thermal shutdown, VCCundervoltage lockout, gate drive undervoltage lockout, maximum duty cycle limiter, and a precharge switch.