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UA78M

ACTIVE

500mA 35V linear voltage regulator

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Data sheet

UA78M

ACTIVE
Data sheet Order now

Product details

Output options Adjustable Output, Fixed Output Iout (max) (A) 0.5 Vin (max) (V) 30 Vin (min) (V) 5.3 Vout (max) (V) 12 Vout (min) (V) 3.3 Fixed output options (V) 3.3, 5, 6, 8, 9, 10, 12 Rating Catalog Noise (µVrms) 40 PSRR at 100 KHz (dB) 40 Iq (typ) (mA) 4.5 Thermal resistance θJA (°C/W) 23 Load capacitance (min) (µF) 0.1 Regulated outputs (#) 1 Accuracy (%) 3 Dropout voltage (Vdo) (typ) (mV) 2000 Operating temperature range (°C) -40 to 125
Output options Adjustable Output, Fixed Output Iout (max) (A) 0.5 Vin (max) (V) 30 Vin (min) (V) 5.3 Vout (max) (V) 12 Vout (min) (V) 3.3 Fixed output options (V) 3.3, 5, 6, 8, 9, 10, 12 Rating Catalog Noise (µVrms) 40 PSRR at 100 KHz (dB) 40 Iq (typ) (mA) 4.5 Thermal resistance θJA (°C/W) 23 Load capacitance (min) (µF) 0.1 Regulated outputs (#) 1 Accuracy (%) 3 Dropout voltage (Vdo) (typ) (mV) 2000 Operating temperature range (°C) -40 to 125
SOT-223 (DCY) 4 45.5 mm² 6.5 x 7 TO-220 (KCS) 3 46.228 mm² 10.16 x 4.55 TO-252 (KVU) 3 66.726 mm² 6.6 x 10.11
  • Input voltage range (VIN): 5.3V to 35V
  • Output voltage range (VOUT): 3.3V to 12V
  • Output current (IOUT): Up to 500mA
  • Quiescent current IQ: 4.5mA
  • Built-in short-circuit current limiting and thermal protection
  • Stable without any external components
  • Operating temperature range:
    • Legacy chip C versions: 0°C to +125°C
    • Legacy chip I version: –40°C to +125°C
    • New chip: –40°C to +125°C
  • Packages:
    • 3-pin, 6.5mm × 7mm SOT-223
    • 3-pin, 6.6mm × 10.11mm TO-252
  • Input voltage range (VIN): 5.3V to 35V
  • Output voltage range (VOUT): 3.3V to 12V
  • Output current (IOUT): Up to 500mA
  • Quiescent current IQ: 4.5mA
  • Built-in short-circuit current limiting and thermal protection
  • Stable without any external components
  • Operating temperature range:
    • Legacy chip C versions: 0°C to +125°C
    • Legacy chip I version: –40°C to +125°C
    • New chip: –40°C to +125°C
  • Packages:
    • 3-pin, 6.5mm × 7mm SOT-223
    • 3-pin, 6.6mm × 10.11mm TO-252

The UA78M fixed-voltage integrated-circuit voltage regulators is designed for a wide range of applications. Use the UA78M for on-card regulation to eliminate noise and distribution problems associated with single-point regulation. The UA78M is also used with power-pass elements to make high-current voltage regulators. The UA78M delivers up to 500mA of output current. Additionally, the UA78M does not need an external capacitor for stable operation across the load current range. The internal current-limiting and thermal-shutdown features of this regulator help protect the device from overload.

The UA78M is characterized for the junction temperature range of –40°C to +125°C. See the Device Nomenclature table for more details.

The UA78M fixed-voltage integrated-circuit voltage regulators is designed for a wide range of applications. Use the UA78M for on-card regulation to eliminate noise and distribution problems associated with single-point regulation. The UA78M is also used with power-pass elements to make high-current voltage regulators. The UA78M delivers up to 500mA of output current. Additionally, the UA78M does not need an external capacitor for stable operation across the load current range. The internal current-limiting and thermal-shutdown features of this regulator help protect the device from overload.

The UA78M is characterized for the junction temperature range of –40°C to +125°C. See the Device Nomenclature table for more details.
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Technical documentation

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Type Title Date
* Data sheet UA78M 35V, 500mA, Positive-Voltage Linear Regulator datasheet (Rev. U) PDF | HTML 17 May 2024
Application note LDO Noise Demystified (Rev. B) PDF | HTML 18 Aug 2020
Application note LDO PSRR Measurement Simplified (Rev. A) PDF | HTML 09 Aug 2017

Design & development

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Evaluation board

MLTLDO2EVM-037 — Universal LDO linear voltage regulator evaluation module for DCY, DDA and KVU packages

The MLTLDO2EVM-037 multipackage low-dropout (LDO) evaluation module (EVM) allows design engineers to evaluate the operation and performance of several common packages of linear regulators for possible use in their own circuit application. This EVM configuration contains a DDA, 3-pin and 5-pin KVU, (...)

User guide: PDF
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Simulation model

UA78M Fixed 5V PSpice Transient Model

SLVME53.ZIP (26 KB) - PSpice Model
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Package Pins CAD symbols, footprints & 3D models
SOT-223 (DCY) 4 Ultra Librarian
TO-220 (KCS) 3 Ultra Librarian
TO-252 (KVU) 3 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

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