900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf






etcTI

TL499A Datasheet Preview

TL499A Datasheet

Wide-Range Power-Supply Controllers

No Preview Available !

Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
TL499A
SLVS029H – JANUARY 1984 – REVISED NOVEMBER 2015
TL499A Wide-Range Power-Supply Controllers
1 Features
1 Internal Series-Pass and Step-Up Switching
Regulator
• Output Adjustable From 2.9 V to 30 V
• 1-V to 10-V Input for Switching Regulator
• 4.5-V to 32-V Input for Series Regulator
• Externally Controlled Switching Current
• No External Rectifier Required
2 Applications
• Voltage Boosting
• Dual-Supply Voltage Reglation
• Battery Back-Ups
• Microprocessor Memory Power
3 Description
The TL499A device is an integrated circuit designed
to provide a wide range of adjustable regulated
supply voltages. The regulated output voltage can be
varied from 2.9 V to 30 V by adjusting two external
resistors. When the TL499A is ac-coupled to line
power through a step-down transformer, it operates
as a series DC voltage regulator to maintain the
regulated output voltage. With the addition of a
battery from 1.1 V to 10 V, an inductor, a filter
capacitor, and two resistors, the TL499A operates as
a step-up switching regulator during an AC-line
failure. The adjustable regulated output voltage
makes the TL499A useful for a wide range of
applications. Providing backup power during an AC-
line failure makes the TL499A extremely useful in
microprocessor memory applications. The TL499AC
is characterized for operation from –20°C to +85°C.
Device Information(1)
PART NUMBER PACKAGE (PIN) BODY SIZE (NOM)
TL499A
SO (8)
PDIP (8)
6.20 mm × 5.30 mm
9.81 mm × 6.35 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application
L = 50 µH
1
SERIES IN1
3
SW REG IN2
RCL = 500 Ω
TL499A
18
SERIES IN1 OUTPUT
27
REF
GND (PWR)
36
SW REG IN2
SW IN
4 SW CURRENT
5
GND
CTRL
CP = 0.01 µF
8
OUTPUT
+
RE1
CF = 470 µF
RE2 = 4.7 kΩ
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.




etcTI

TL499A Datasheet Preview

TL499A Datasheet

Wide-Range Power-Supply Controllers

No Preview Available !

TL499A
SLVS029H – JANUARY 1984 – REVISED NOVEMBER 2015
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 3
6.1 Absolute Maximum Ratings ...................................... 3
6.2 ESD Ratings ............................................................ 3
6.3 Recommended Operating Conditions....................... 4
6.4 Thermal Information .................................................. 4
6.5 Electrical Characteristics........................................... 4
6.6 Typical Characteristics .............................................. 5
7 Detailed Description .............................................. 6
7.1 Overview ................................................................... 6
7.2 Functional Block Diagram ......................................... 6
7.3 Feature Description................................................... 6
7.4 Device Functional Modes.......................................... 6
8 Application and Implementation .......................... 7
8.1 Application Information.............................................. 7
8.2 Typical Application ................................................... 7
9 Power Supply Recommendations...................... 10
10 Layout................................................................... 11
10.1 Layout Guidelines ................................................. 11
10.2 Layout Example .................................................... 11
11 Device and Documentation Support ................. 12
11.1 Community Resources.......................................... 12
11.2 Trademarks ........................................................... 12
11.3 Electrostatic Discharge Caution ............................ 12
11.4 Glossary ................................................................ 12
12 Mechanical, Packaging, and Orderable
Information ........................................................... 12
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision G (September 2001) to Revision H
Page
• Added Pin Configuration and Functions section, ESD Ratings table, Feature Description section, Device Functional
Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device
and Documentation Support section, and Mechanical, Packaging, and Orderable Information section .............................. 1
2 Submit Documentation Feedback
Product Folder Links: TL499A
Copyright © 1984–2015, Texas Instruments Incorporated


Part Number TL499A
Description Wide-Range Power-Supply Controllers
Maker etcTI
PDF Download

TL499A Datasheet PDF






Similar Datasheet

1 TL499A Wide-Range Power-Supply Controllers
etcTI





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z



Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy