UC39431 Status: ACTIVE

Precision Adjustable Shunt Regulator

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Datasheet

Precision Adjustable Shunt Regulator (PDF 160 KB)
05 Sep 1999

	UC29431	UC39431
Output Current(A)	0.1	0.1
Operating Supply(Min)(V)	2.2	2.2
Operating Supply(Max)(V)	36	36
Operating Supply Current(mA)	0.5	0.5
Reference Voltage(V)	1.3	1.3
Vref tol(%)	0.8	0.8
On Board Reference	2.82, 3.12, 5.1, 7.8, 10.42, 12.24/0.7%	2.82, 3.12, 5.1, 7.8, 10.42, 12.24/0.7%
Pin/Package	8SOIC	8PDIP, 8SOIC
Rating	Catalog	Catalog
	Samples	Samples
	Inventory	Inventory

Other qualified versions of UC39431

Version	Part Number	Definition
Military	UC19431	QML certified for Military and Defense Applications

Customers Who Evaluated This Product Also Evaluated

UC39432: Precision Analog Controller
UC3714: Complementary Switch FET Drivers
UCC27223: High-Efficiency Predictive Synchronous Buck Driver
TL430: Adjustable Shunt Regulator

Product Information

Features

Multiple On-Chip Programmable Reference Voltages
0.4% Initial Accuracy
0.7% Overall Reference Tolerance
2.2V to 36.0V Operating Supply Voltage and User Programmable Reference
36.0V Operating Supply Voltage
Reference Accuracy Maintained For Entire Range of Supply Voltage
Superior Accuracy and Easier Compensation for Optoisolator Application
Improved Architecture Provides a Known Linear Transconductance with a +5% Typical Tolerance

Description

The UC39431 is an adjustable shunt voltage regulator with 100mA sink capability. The architecture, comprised of an error amplifier and transconductance amplifier, gives the user separate control of the small signal error voltage frequency response along with a fixed linear transconductance. A minimum 3MHz gain bandwidth product for both the error and transconductance amplifiers assures fast response. In addition to external programming, the IC has three internal resistors that can be connected in six different configurations to provide regulated voltages of 2.82V, 3.12V, 5.1V, 7.8V, 10.42V, and 12.24V. A sister device (UC39432) provides access to the non-inverting error ampilifer input and reference, while eliminating the three internal resistors.

Pricing / Packaging / CAD Design Tools / Samples

			Price	Packaging			CAD Design Tools		Samples
Device	Status	Temp (^oC)	Price \| Quantity	Package \| Pins	Top Side Marking	Package QTY \| Package Carrier	Symbols	Footprints	Samples
UC39431D	ACTIVE	0 to 70	4.75 \| 1ku	SOIC (D) \| 8	View	75 \| TUBE
UC39431DG4	ACTIVE	0 to 70	4.75 \| 1ku	SOIC (D) \| 8	View	75 \| TUBE
UC39431N	ACTIVE	0 to 70	4.75 \| 1ku	PDIP (P) \| 8	View	50 \| TUBE
UC39431NG4	ACTIVE	0 to 70	4.75 \| 1ku	PDIP (P) \| 8	View	50 \| TUBE

* Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For higher volume price quotes,prices in local currency or delivery quotes, please contact your local Texas Instruments Sales Office or Authorized Distributor.

Inventory

Reported Distributor Inventory as of 9:51 AM GMT, 22 Nov 2009
Region	Company	In Stock	Purchase
TI Lead Time*: 20 WeeksUC39431D
Americas	Arrow	23
	Avnet	41
	Rochester Electronics	>1k
Worldwide	DigiKey	159
TI Lead Time*: 20 WeeksUC39431DG4
Worldwide	DigiKey	Available
TI Lead Time*: 14 WeeksUC39431N
Americas	Newark	150
Americas	Rochester Electronics	>1k
Worldwide	DigiKey	134
TI Lead Time*: 14 WeeksUC39431NG4
Worldwide	DigiKey	Available
View all Distributors

** Lead time information is not available at this time. However, our information is updated daily so please check back with us soon. Please contact your preferred TI Authorized Distributor for additional information.

Quality & Lead (Pb)-Free Data

	Product Content				DPPM / MTBF / FIT Rate
Device	Eco Plan*	Lead / Ball Finish	MSL Rating / Peak Reflow	Details	Details
UC39431D	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
UC39431DG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
UC39431N	Green (RoHS & no Sb/Br)	CU NIPDAU	N/A for Pkg Type	View	View
UC39431NG4	Green (RoHS & no Sb/Br)	CU NIPDAU	N/A for Pkg Type	View	View

* The planned eco-friendly classification: Pb-Free (RoHS) or Pb-Free (RoHS Exempt) or Green (RoHS & no Sb/Br) - please click on the Product Content Details "View" link in the table above for the latest availability information and additional product content details.

If the information you are requesting is not available online at this time, contact one of our Product Information Centers regarding the availability of this information.

Technical Documents

Most useful technical documents for UC39431

Datasheet

Precision Adjustable Shunt Regulator (PDF, 160 KB)
05 Sep 1999

Customers Who Evaluated This Product Also Evaluated...
Part #	Name	Product Family	Comments
UC39432	Precision Analog Controller	POWER SUPPLY SUPPORT-FEEDBACK SIGNAL GENERATORS	TI customers also evaluated this product.
UC3714	Complementary Switch FET Drivers	AC/DC AND DC/DC POWER SUPPLIES-MOSFET DRIVERS	TI customers also evaluated this product.
UCC27223	High-Efficiency Predictive Synchronous Buck Driver	AC/DC AND DC/DC POWER SUPPLIES-MOSFET DRIVERS	TI customers also evaluated this product.
TL430	Adjustable Shunt Regulator	VOLTAGE REFERENCE-SHUNT VOLTAGE REFERENCE	TI customers also evaluated this product.
PTB48600A	85 W Dual Complementary-Output DC/DC Converter	ISOLATED DC/DC CONVERTERS-36V TO 75V INPUT	TI customers also evaluated this product.
UC3825	High Speed PWM Controller	AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS	TI customers also evaluated this product.
UCC3803	Low-Power BiCMOS Current-Mode PWM	AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS	TI customers also evaluated this product.
TL494	PWM Control Circuit	AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS	TI customers also evaluated this product.
UC3709	Inverting High-Speed MOSFET Drivers	AC/DC AND DC/DC POWER SUPPLIES-MOSFET DRIVERS	TI customers also evaluated this product.

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UC39431 Status: ACTIVE

Precision Adjustable Shunt Regulator

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