tk71547as Toko Inc., tk71547as Datasheet

tk71547as

Manufacturer Part Number

tk71547as

Description

Low Dropout Voltage Regulator

Manufacturer

Toko Inc.

Datasheet

1.TK71547AS.pdf (15 pages)

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FEATURES

DESCRIPTION

The TK715xx is a low dropout linear regulator housed in a

small SOT23-3 package, rated at 400 mW. An internal

PNP transistor is used to achieve a low dropout voltage of

105 mV (typ.) at 50 mA load current. This device offers

high precision output voltage of ± 2.0 % or ± 60 mV. The

TK715xx has a very low quiescent current of 25 µA (typ.)

at no load. The low quiescent current and dropout voltage

make this part ideal for battery powered applications. The

internal reverse bias protection eliminates the requirement

for a reverse voltage protection diode, saving cost and

board space. The high 60 dB ripple rejection and low noise

provide enhanced performance for critical applications.

VOLTAGE CODE

15 = 1.5 V

16 = 1.6 V

17 = 1.7 V

18 = 1.8 V

19 = 1.9 V

20 = 2.0 V

21 = 2.1 V

22 = 2.2 V

23 = 2.3 V

24 = 2.4 V

25 = 2.5 V

26 = 2.6 V

27 = 2.7 V

28 = 2.8 V

29 = 2.9 V

30 = 3.0 V

31 = 3.1 V

32 = 3.2 V

33 = 3.3 V

34 = 3.4 V

March 2001 TOKO, Inc.

High Voltage Precision at ± 2.0% or ± 60 mV

Very Low Quiescent Current

Very Low Dropout Voltage

Reverse Voltage Protection

Miniature Package (SOT23-3)

Short Circuit Protection

High Ripple Rejection

Can use Multilayer Ceramic Capacitors

Voltage Code

35 = 3.5 V

36 = 3.6 V

37 = 3.7 V

38 = 3.8 V

39 = 3.9 V

40 = 4.0 V

41 = 4.1 V

42 = 4.2 V

43 = 4.3 V

44 = 4.4 V

45 = 4.5 V

46 = 4.6 V

47 = 4.7 V

48 = 4.8 V

49 = 4.9 V

50 = 5.0 V

60 = 6.0 V

70 = 7.0 V

80 = 8.0 V

90 = 9.0 V

ORDERING INFORMATION

TK715

TEMPERATURE CODE

C -30 to +80 °C

PACKAGE CODE

S : SOT-23-3

ASCL

TAPE/REEL CODE

L: Tape Left

Package Code

Tape/ Reel Code

Temp. Code

LOW DROPOUT VOLTAGE REGULATOR

APPLICATIONS

V IN

Battery Powered Systems

Cellular Telephones

Pagers

Personal Communications Equipment

Portable Instrumentation

Portable Consumer Equipment

Radio Control Systems

Toys

Low Voltage Systems

BLOCK DIAGRAM

TK715xxAS

PROTECTION

REFERENCE

THERMAL

BANDGAP

GND

V IN

TK715xxAS

GND

V OUT

Page 1

V OUT

Related parts for tk71547as

tk71547as Summary of contents

Page 1

FEATURES n High Voltage Precision at ± 2.0% or ± Very Low Quiescent Current n Very Low Dropout Voltage n Reverse Voltage Protection n Miniature Package (SOT23-3) n Short Circuit Protection n High Ripple Rejection n Can ...

Page 2

TK715xxAS ABSOLUTE MAXIMUM RATINGS (V Supply Voltage ............................................. -0 Power Dissipation (Note 1) ................................ 400 mW Reverse Bias ............................................................. 8 V Short Circuit Current ........................................... 170 mA Storage Temperature (Ambient) .............. -55 to +150 °C TK715xx ELECTRICAL ...

Page 3

ABSOLUTE MAXIMUM RATINGS (V Supply Voltage ............................................. -0 Power Dissipation (Note 1) ................................ 400 mW Reverse Bias ............................................................. 8 V Short Circuit Current ........................................... 170 mA Storage Temperature (Ambient) .............. -55 to +150 °C TK715xx ELECTRICAL CHARACTERISTICS ...

Page 4

TK715xxAS TK715xxAS ELECTRICAL CHARACTERISTICS TABLE 1 Output Voltage V OUT(MIN) Voltage Code 1 1.440 V 1 1.540 V 1 1.640 V 1 1.740 V 1 1.840 V 2 ...

Page 5

V IN TYPICAL PERFORMANCE CHARACTERISTICS LOAD REGULATION V OUT TYPICAL OUT (mA) LINE REGULATION V OUT TYPICAL (V) March 2001 TOKO, Inc. TEST CIRCUIT OUT 0.1 ...

Page 6

TK715xxAS TYPICAL PERFORMANCE CHARACTERISTICS (CONT.) DROPOUT VOLTAGE VS. OUTPUT CURRENT 0 -100 -200 OUT (mA) GROUND PIN CURRENT vs. OUTPUT CURRENT OUT (mA) Ripple Rejection ...

Page 7

TYPICAL PERFORMANCE CHARACTERISTICS (CONT.) Output Noise NOISE LEVEL (TK71530A) VS. OUTPUT CURRENT 250 2 4.7 F 200 150 100 400 ...

Page 8

TK715xxAS DEFINITION AND EXPLANATION OF TECHNICAL TERMS OUTPUT VOLTAGE (V ) OUT The output voltage is specified with V and mA. OUT DROPOUT VOLTAGE (V ) DROP The dropout voltage is the difference between the input voltage ...

Page 9

DEFINITION AND EXPLANATION OF TECHNICAL TERMS (CONT.) determine the power dissipation for shutdown when mounted, attach the device on the actual PCB and delib- erately increase the output current (or raise the input voltage) until the thermal protection circuit is ...

Page 10

TK715xxAS INPUT-OUTPUT CAPACITORS Linear regulators require input and output capacitors in order to maintain regulator loop stability. The output capacitor should be selected within the Equivalent Series Resistance (ESR) range as shown in the graphs below for stable operation. The ...

Page 11

APPLICATION INFORMATION (CONT) INPUT-OUTPUT CAPACITORS (CONT) OUTPUT NOISE IMPROVEMENT An RC filter can be added to the output stage of the regulator to reduce output noise when the input voltage is high and the output current only makes small changes. ...

Page 12

TK715xxAS APPLICATION INFORMATION (CONT) R(*) MAG -17. dB/ B(*) B -41. dB/ FILTER START: 100 Hz STOP: 1 MHz OUT (B): -20.00 dBm ST: AUTO x1 IRG: 26 dBm RBW: 30 kHZ ...

Page 13

APPLICATION INFORMATION (CONT.) BOARD LAYOUT The copper pattern should be as large as possible. Power dissipation is 400 mW for the SOT23-3, derated at 3.2 mW/°C for operation above T = 25°C (qja = 312°C/W) A The internal reverse bias ...

Page 14

TK715xxAS APPLICATION INFORMATION (CONT.) REVERSE VOLTAGE PROTECTION The internal reverse bias protection eliminates the require- ment for a reverse voltage protection diode. This saves both cost and board space 715xxAS GND Another reverse voltage protection technique is illustrated ...

Page 15

SOT23-3 3 Marking VOLTAGE CODE PRODUCT CODE + 0.15 0.4 0. 0.95 0. 2.9 0.1 Dimensions are shown in millimeters Tolerance: x.x = ± 0.2 mm (unless otherwise specified) TOKO AMERICA REGIONAL OFFICES Midwest Regional Office ...

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