TL2575 Regulators Datasheet

TL2575 Datasheet, PDF, Equivalent


Part Number

TL2575

Description

1-A Simple Step-Down Switching Voltage Regulators

Manufacture

etcTI

Total Page 30 Pages
Datasheet
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TL2575, TL2575HV
SLVS638C – JANUARY 2006 – REVISED NOVEMBER 2014
TL2575, TL2575HV 1-A Simple Step-Down Switching Voltage Regulators
1 Features
1 Fixed 3.3-V, 5-V, 12-V, and 15-V Options with
±5% Regulation (Max) Over Line, Load, and
Temperature Conditions
• Adjustable Option With a Range of 1.23 V to 37 V
(57 V for HV Version) and ±4% Regulation (Max)
Over Line, Load, and Temperature Conditions
• Specified 1-A Output Current
• Wide Input Voltage Range
– 4.75 V to 40 V (60 V for HV Version)
• Requires Only Four External Components (Fixed
Versions) and Uses Readily Available Standard
Inductors
• 52-kHz (Typ) Fixed-Frequency Internal Oscillator
• TTL Shutdown Capability With 50-μA (Typ)
Standby Current
• High Efficiency
– As High as 88% (Typ)
• Thermal Shutdown and Current-Limit Protection
with Cycle-by-Cycle Current Limiting
2 Applications
• Simple High-Efficiency Step-Down (Buck)
Regulators
• Pre-Regulators for Linear Regulators
• On-Card Switching Regulators
• Positive-to-Negative Converters (Buck-Boost)
3 Description
The TL2575 and TL2575HV devices provide all the
active functions needed for a step-down (buck)
switching regulator in an integrated circuit. They
require four to six external components for operation.
They accept a wide input-voltage range of up to 60 V
(TL2575-HV) and are available in fixed output
voltages of 3.3 V, 5 V, 12 V, 15 V, or an adjustable-
output version. The TL2575 and TL2575HV devices
have an integrated switch capable of delivering 1 A of
load current, with excellent line and load regulation.
The device also offers internal frequency
compensation, a fixed-frequency oscillator, cycle-by-
cycle current limiting, and thermal shutdown. In
addition, a manual shutdown is available via an
external ON/OFF pin.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
PDIP (16)
19.31 mm x 6.35 mm
TL2575, TL2575HV TO-263 (5)
10.16 mm x 8.93 mm
TO-220 (5)
10.16 mm x 8.82 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
4 Functional Block Diagram
Unregulated
DC Input
VIN
1
+
CIN
Internal
Regulator
On/Off
ON/OFF
5
FEEDBACK
4
Fixed-Gain
R2 Error Amplifier
R1
1 kΩ
+
_
Comparator
+
_
1-A
Driver Switch
OUTPUT L1
2
D1
+
COUT
1.23-V
Band-Gap
Reference
52-kHz
Thermal Current
Oscillator Reset Shutdown
Limit
GND
3
VOUT
L
O
A
D
3.3 V: R2 = 1.7 kΩ
5 V: R2 = 3.1 kΩ
12 V: R2 = 8.84 kΩ
15 V: R2 = 11.3 kΩ
ADJ: R1 = Open, R2 = 0
Pin numbers are for the KTT (TO-263) package.
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.

TL2575
TL2575, TL2575HV
SLVS638C – JANUARY 2006 – REVISED NOVEMBER 2014
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Functional Block Diagram .................................... 1
5 Revision History..................................................... 2
6 Pin Configuration and Functions ......................... 3
7 Specifications......................................................... 4
7.1 Absolute Maximum Ratings ..................................... 4
7.2 Handling Ratings ...................................................... 4
7.3 Recommended Operating Conditions....................... 4
7.4 Thermal Information .................................................. 4
7.5 Electrical Characteristics — TL2575........................ 5
7.6 Electrical Characteristics — TL2575HV................... 6
7.7 Typical Characteristics .............................................. 7
8 Parameter Measurement Information ................ 10
8.1 Test Circuits ............................................................ 10
9 Detailed Description ............................................ 11
9.1 Overview ................................................................. 11
9.2 Functional Block Diagram ....................................... 11
9.3 Feature Description................................................. 12
9.4 Device Functional Modes........................................ 12
10 Application and Implementation........................ 13
10.1 Typical Application ............................................... 13
11 Power Supply Recommendations ..................... 20
12 Layout................................................................... 20
12.1 Layout Guidelines ................................................. 20
12.2 Layout Example .................................................... 20
13 Device and Documentation Support ................. 21
13.1 Related Links ........................................................ 21
13.2 Trademarks ........................................................... 21
13.3 Electrostatic Discharge Caution ............................ 21
13.4 Glossary ................................................................ 21
14 Mechanical, Packaging, and Orderable
Information ........................................................... 22
5 Revision History
Changes from Revision B (January 2007) to Revision C
Page
• Updated document to new TI data sheet format. ................................................................................................................... 1
• Deleted Ordering Information table. ....................................................................................................................................... 1
• Added Pin Functions table...................................................................................................................................................... 3
• Added Handling Ratings table. ............................................................................................................................................... 4
• Changed Thermal Information table. ...................................................................................................................................... 4
• Added Detailed Description section. .................................................................................................................................... 11
• Added Application and Implementation section.................................................................................................................... 13
• Added Power Supply Recommendations and Layout sections............................................................................................ 20
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Product Folder Links: TL2575 TL2575HV


Features Product Folder Sample & Buy Technical Documents Tools & Software Support & Community TL2575, TL2575HV SLVS638C JANUARY 2006 – REVISED NOVEMBER 201 4 TL2575, TL2575HV 1-A Simple Step-Down Switching Voltage Regulators 1 Featur es •1 Fixed 3.3-V, 5-V, 12-V, and 15- V Options with ±5% Regulation (Max) Ov er Line, Load, and Temperature Conditio ns • Adjustable Option With a Range o f 1.23 V to 37 V (57 V for HV Version) and ±4% Regulation (Max) Over Line, Lo ad, and Temperature Conditions • Spec ified 1-A Output Current • Wide Input Voltage Range – 4.75 V to 40 V (60 V for HV Version) • Requires Only Four External Components (Fixed Versions) a nd Uses Readily Available Standard Indu ctors • 52-kHz (Typ) Fixed-Frequency Internal Oscillator • TTL Shutdown Ca pability With 50-μA (Typ) Standby Curr ent • High Efficiency – As High as 88% (Typ) • Thermal Shutdown and Curr ent-Limit Protection with Cycle-by-Cycl e Current Limiting 2 Applications • Simple High-Efficiency Step-Down (Buck) Regulators • Pre.
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