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Texas Instruments RFQ AVAILABLE

UC3833J

ANALOG CIRCUIT, 1 FUNC, CDIP8

Part Number
UC3833J
Manufacturer
Texas Instruments
Category
Voltage Regulators - Linear Regulator Controllers
Package
8-DIP (0.300", 7.62mm)
Datasheet:
UC3833J.pdf
Description
ANALOG CIRCUIT, 1 FUNC, CDIP8
Select Quantity Stock: 825
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PRODUCT INFORMATION

Product Details

PRODUCT TECHNICAL REFERENCE

UC3833J Precision Low Dropout Linear Controller

A comprehensive technical overview of the UC3833J, a precision low dropout linear controller from Texas Instruments featuring fixed 2V output, 100mA drive capability, and duty-ratio current limiting. Covers device function, core features, electrical specifications, 8-pin CDIP package, pin configuration, typical applications, and replacement selection guidance.

Texas Instruments 8-Pin CDIP (JG) 4.5V to 36V Input
Device Classification Precision Low Dropout Linear Controller
Part Number
UC3833J
Mounting Type
Through Hole
Operating Temperature Range
0°C to +70°C
01
PRODUCT OVERVIEW

What Is the UC3833J?

UC3833J is a precision low dropout linear controller from Texas Instruments (formerly Unitrode) that includes all the basic control functions required in the design of very low dropout linear regulators[reference:0]. The device features a 2-volt (±1%) precision reference, error amplifier, undervoltage lockout (UVLO), and a high current driver with both source and sink outputs, allowing the use of either NPN or PNP external pass transistors[reference:1][reference:2].

The UC3833J incorporates an innovative duty-ratio current limiting technique that provides peak load capability while limiting the average power dissipation of the external pass transistor during fault conditions[reference:3]. When the load current reaches an accurately programmed threshold, a gated-astable timer is enabled, which switches the regulator's pass device off and on at an externally programmable duty-ratio[reference:4]. If the timer pin is grounded, the duty-ratio timer is disabled and the IC operates in constant-voltage/constant-current regulating mode[reference:5].

The UC3833J is the commercial temperature range version (0°C to 70°C) of the UC3833 family[reference:6]. It is available in a ceramic 8-pin CDIP (J suffix) package[reference:7]. The device operates from a 4.5V to 36V input voltage range and provides a fixed 2V output with 100mA output drive capability[reference:8].

Precision 2V Reference 2-volt (±1%) precision reference for accurate output voltage regulation.
Innovative Duty-Ratio Current Limiting Provides peak load capability while limiting average power dissipation during fault conditions.
Flexible Pass Transistor Support High current driver with both source and sink outputs allows use of NPN or PNP external pass transistors[reference:9].
02
DEVICE HIGHLIGHTS

Key Features and Benefits of UC3833J

Precision 1% Reference

Precision 2-volt reference with ±1% accuracy provides stable and accurate output voltage regulation[reference:10][reference:11].

Duty-Ratio Current Limiting

Innovative current limiting technique provides peak load capability while limiting average power dissipation of the external pass transistor during fault conditions[reference:12].

NPN or PNP Pass Transistor Support

High current driver with both source and sink outputs allows use of either NPN or PNP external pass transistors[reference:13].

Low Supply Current

Typical supply current of 3.3mA (max 9.5mA) for low power operation[reference:14].

Comprehensive Protection Features

Includes undervoltage lockout (UVLO), thermal shutdown, over-current protection, and input undervoltage protection[reference:15][reference:16].

Ceramic CDIP-8 Package

8-pin ceramic CDIP (J suffix) package for through-hole mounting with 0.300" (7.62mm) lead spacing[reference:17].

03
REFERENCE DATA

Technical Specifications for UC3833J

Part Number UC3833J Manufacturer Texas Instruments
Device Type Precision Low Dropout Linear Controller Output Type Positive Fixed[reference:18]
Output Voltage 2V (Fixed)[reference:19] Number of Outputs 1[reference:20]
Input Voltage Range 4.5V to 36V[reference:21][reference:22] Output Current (Drive) 100mA[reference:23][reference:24]
Supply Current 3.3mA Typ, 9.5mA Max[reference:25][reference:26] Reference Accuracy ±1%[reference:27][reference:28]
Package 8-Pin CDIP (JG) Package Body Size 9.58mm[reference:29]
Lead Spacing 0.300" (7.62mm)[reference:30] Mounting Type Through Hole[reference:31]
Operating Temperature 0°C to +70°C[reference:32][reference:33] Storage Temperature -65°C to +150°C
MSL Rating Level-3-260C-168 HR[reference:34][reference:35] RoHS Non-Compliant[reference:36]
Packaging Bulk / Tube[reference:37] Product Status Active / Obsolete[reference:38][reference:39]

Electrical values shown above are reference values. Test conditions, limits, and guaranteed performance should always be confirmed from the current official manufacturer datasheet before design or production use.

04
DESIGN REFERENCE

Circuit Considerations for UC3833J

Regulator Configuration & Operation

The UC3833J is a precision low dropout linear controller designed for use with external pass transistors:

  • Fixed Output Voltage: 2V output with ±1% precision reference[reference:40]
  • External Pass Transistor: High current driver with both source and sink outputs supports NPN or PNP transistors[reference:41]
  • Duty-Ratio Current Limiting: Programmable duty-ratio timer provides peak load capability while limiting average power dissipation during faults[reference:42]
  • Constant Current Mode: Grounding the timer pin disables duty-ratio timer for constant-voltage/constant-current operation[reference:43]
  • Protection Features: Includes undervoltage lockout (UVLO) and thermal shutdown for safe operation[reference:44]

PCB and Power-Supply Guidance

Linear controller performance depends on layout, bypassing, and component selection:

  • Input Voltage: 4.5V to 36V operation; ensure adequate input capacitance for stability
  • Output Capacitor: Select output capacitor based on external pass transistor and application requirements
  • Timer Capacitor: Connect capacitor to timer pin to set duty-ratio timing; ground to disable timer[reference:45]
  • Current Sense: Over-current detection threshold accurate to 5%[reference:46]
  • Thermal Management: CDIP-8 package provides excellent thermal characteristics for through-hole mounting
  • Ceramic Package: The J suffix denotes ceramic DIP construction for enhanced reliability[reference:47]
  • Verify the recommended PCB footprint from the official datasheet before production
05
8-PIN CDIP (JG)

Pin Configuration Reference for UC3833J

UC3833J
CDIP (JG) TOP VIEW

Confirm package orientation and pin numbering against the official package drawing before PCB layout. The JG package has 8 pins with 0.300" (7.62mm) lead spacing[reference:48].

1 VIN+ Positive Input Supply - 4.5V to 36V
2 VREF 2V Precision Reference Output - 100µA Max Load
3 E/A(+)/INV Error Amplifier Inverting Input
4 COMP Error Amplifier Output / Compensation
5 DRIVER OUT High Current Driver Output - Sink/Source for External Pass Transistor
6 SENSE Current Sense Input - Programmable Current Limit
7 TIMER Duty-Ratio Timer - Capacitor to ground sets timing; ground to disable
8 VIN- Negative Input Supply / Ground
06
APPLICATION AREAS

Typical Applications for UC3833J

Very Low Dropout Linear Regulators

Precision linear regulators with external pass transistors for extremely low dropout voltage applications[reference:49].

High Reliability Systems

Ceramic CDIP package provides enhanced reliability for military and aerospace applications.

Precision Power Supplies

2V fixed output with ±1% accuracy for precision instrumentation and test equipment.

Industrial Control Systems

4.5V to 36V input range supports a wide variety of industrial power applications.

Post-Regulator for Switching Supplies

Clean up noisy switching regulator outputs with low dropout linear regulation.

General Purpose 2V Power Supplies

Versatile linear controller for custom 2V power supply designs with external pass transistors.

07
REPLACEMENT GUIDANCE

Selecting an Alternative for UC3833J

A replacement for the UC3833J should not be selected only by product category. The electrical characteristics, package, and pin configuration must be evaluated against the actual circuit requirements.

Input voltage range (4.5V–36V)
Output voltage (2V fixed)
Output drive current (100mA)
Package (8-pin CDIP, JG)
Temperature range (0°C to 70°C)
Duty-ratio current limiting
NPN/PNP pass transistor support
Reference accuracy (±1%)

Family alternatives: UC3833N (plastic PDIP-8, same electrical specs)[reference:50], UC3833DW (SOIC-16, surface mount), UC2833J (industrial temperature range, –40°C to 85°C)[reference:51], UC1833J (military temperature range, –55°C to 125°C). The UC2832 series provides added versatility with 14 pins[reference:52]. The UC3833J is a commercial temperature range device in ceramic package; the J suffix denotes ceramic DIP[reference:53]. Select based on temperature range, package, and packaging needs.

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MANUFACTURER INFORMATION

Texas Instruments

The UC3833 series (UC3833J) belongs to the precision low dropout linear controller portfolio of Texas Instruments (formerly Unitrode). The device is designed for very low dropout linear regulator applications with an innovative duty-ratio current limiting technique. The UC3833 family includes the basic functions in a low-cost 8-pin package, while the UC2832 series provides added versatility with 14 pins[reference:54]. Commercial temperature range devices (0°C to 70°C) are ordered as UC3832/3, while industrial range devices (–40°C to 85°C) are ordered as UC2832/3[reference:55].

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Technical Information Disclaimer

This technical guide is provided for product identification and preliminary reference only. Electrical limits, package dimensions, pin configuration, product status, and application suitability must be verified using current official manufacturer documentation before design, procurement, or production.

TECHNICAL RESOURCES

UC3833J Technical Information

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Specifications

Product Attribute
Attribute Value
Part Number
UC3833J
Manufacturer
Texas Instruments
Package
8-DIP (0.300", 7.62mm)
Series
-
Package/Case
8-DIP (0.300", 7.62mm)
Packaging
Bulk
Product Status
Active
Type
Positive Fixed
Number of Outputs
1
Current - Supply
9.5mA
Voltage - Input
4.5V ~ 36V
Operating Temperature
0°C ~ 70°C
Mounting Type
Through Hole
Supplier Device Package
8-PDIP

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UC3833J Procurement and Technical Support

UC3833J is manufactured by Texas Instruments. This page provides purchasing information including manufacturer, category, package, datasheet, stock reference, price reference and product specifications.

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Part Number
UC3833J
Manufacturer
Texas Instruments
Package
8-DIP (0.300", 7.62mm)
Category
Voltage Regulators - Linear Regulator Controllers
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