tk71741scl Toko Inc., tk71741scl Datasheet

tk71741scl

Manufacturer Part Number

tk71741scl

Description

Dropout Voltage Regulator

Manufacturer

Toko Inc.

Datasheet

1.TK71741SCL.pdf (13 pages)

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Manufacturer

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Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

tk71741scl-G

Manufacturer:

TOKO

Quantity:

20 000

Current page: 1 of 13
Download datasheet (151Kb)

October 2001 TOKO, Inc.

FEATURES

DESCRIPTION

TK717xxS is a low dropout linear regulator with a built-in

electronic switch. The internal switch can be controlled by

TTL or CMOS logic levels. The device is in the ON state

when the control pin is pulled to a logic high level. In the OFF

state, the output impedance becomes very low, quickly

discharging the output capacitor. An external capacitor can

be connected to the noise bypass pin to lower the output

noise level to 30 ~ 50 mV

is included to achieve a low dropout voltage of 103 mV at

100 mA load current. The TK717xx has an exceptionally

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

VOLTAGE CODE

Very Good Stability (CL = 0.22 mF is Stable For

Any Type Capacitor withV

Built-in Shunt Circuit of Output to GND. The Stored

Quickly

Wide Operating Voltage Range (1.8 V ~ 14 V)

Very Low Dropout Voltage (V

100 mA)

Peak Output Current is 370 mA (0.3 V DROP Point)

Very Low Quiescent Current (I

Good Ripple Rejection Ratio (80 dB at 1 kHz)

High Precision Output Voltage (± 1.5 % or ± 50 mV)

Suitable for Very Low Noise Applications

Built-in Active High On/Off Control (0.1 mA Max

Standby Current)

Built-in Short Circuit Protection

Built-in Thermal Shutdown

Very Small Surface Mount Package (SOT23-5)

Energy of the Output Capacitor is Discharged

Voltage Code

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

Package Code

ORDERING INFORMATION

TK717

33 = 3.3 V

34 = 3.4 V

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

RMS

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

. An internal PNP pass transistor

S L

OUT

TAPE/REEL CODE

L: Tape Left

OPERATING TEMP. RANGE

C: -30 ~ 80°C

PACKAGE CODE

S: SOT23-5

= 72 uA at I

DROP

³ 1.8 V)

Operating Temp. Range

= 103 mV at

Tape/Reel Code

OUT

= 0 mA)

LOW DROPOUT VOLTAGE REGULATOR

APPLICATIONS

low quiescent current of 72 mA at no load and 0.8 mA with

a 50 mA load. The standby current is typically 100 pA. The

circuit features very good stability. The ripple rejection is 90

dB at 400 Hz and 80 dB at 1 kHz. Stable operation is

achieved with an output capacitor as low as 0.22 mF; a

capacitor of any type may be used. (However, the larger the

output capacitor is, the better the overall characteristics will

be.)

The TK717xxS is available in a very small SOT23-5 surface

mount package.

CONTROL

Battery Powered Systems

Measurement Systems

Mobile Communications Systems

Cordless Phone, PHS, GSM, CDMA

Industrial Equipment

Personal Computers, Barcode Readers

V IN

CONTROL CIRCUIT

REFERENCE

BANDGAP

BLOCK DIAGRAM

GND

CONTROL

TK717xxS

BYPASS

CONSTANT

CURRENT

NOISE

SOURCE

GND

V IN

OVER CURRENT

PROTECTION

THERMAL &

TK717xxS

DISCHARGE

CIRCUIT

AUTO

BYPASS

V OUT

NOISE

V OUT

Page 1

Related parts for tk71741scl

tk71741scl Summary of contents

Page 1

FEATURES n Very Good Stability ( Stable For Any Type Capacitor withV OUT n Built-in Shunt Circuit of Output to GND. The Stored Energy of the Output Capacitor is Discharged Quickly n Wide Operating Voltage Range ...

Page 2

TK717xxS ABSOLUTE MAXIMUM RATINGS Supply Voltage ............................................... -0.4 to16 V Power Dissipation (Note 1) ................................. 500 mW Reverse Bias Voltage ..................................... -0 Operating Voltage Range ............................... 1 Storage Temperature Range ..................... -55 to +150 ...

Page 3

TK717xxSCL ELECTRICAL CHARACTERISTICS (CONT.) Test conditions °C, unless otherwise specified ...

Page 4

TK717xxS TK717xxSCL ELECTRICAL CHARACTERISTICS TABLE 1 Test Conditions OUT(TYP ...

Page 5

V IN TYPICAL PERFORMANCE CHARACTERISTICS Noise Performance TK71730S NOISE vs 300 CL = CERAMIC ♦ 0.2 µF 250 ♠ 0.4 µ 1.0 µF ♦ ♠ 2.2 µF 200 CL = ...

Page 6

TK717xxS TYPICAL PERFORMANCE CHARACTERISTICS (CONT.) Ripple Rejection TANTALUM CAPACITOR 0 - 0.22 µF -20 -30 -40 -50 -60 -70 -80 -90 -100 0 FREQUENCY (kHz) The ripple rejection characteristic depends on the characteristic and the capacitance ...

Page 7

DEFINITION AND EXPLANATION OF TECHNICAL TERMS OUTPUT VOLTAGE (V ) OUT The output voltage is specified with V and mA. OUT MAXIMUM OUTPUT CURRENT (I The rated output current is specified under the condition where the output ...

Page 8

TK717xxS DEFINITION AND EXPLANATION OF TECHNICAL TERMS (CONT.) PACKAGE POWER DISSIPATION (P This is the power dissipation level at which the thermal sensor is activated. The IC contains an internal thermal sensor which monitors the junction temperature. When the junction ...

Page 9

APPLICATION INFORMATION (CONT.) BOARD LAYOUT October 2001 TOKO, Inc OFF SOT23-5 BOARD LAYOUT PD(mW) 500 -4 °C Mounted as shown Free Air (85) V OUT + GND NOISE BYPASS ...

Page 10

TK717xxS APPLICATION INFORMATION (CONT.) INPUT-OUTPUT CAPACITORS Linear regulators require input and output capacitors in order to maintain the regulator’s loop stability. The equivalent series resistance (ESR) of the output capacitor must be in the stable operation area. However ...

Page 11

APPLICATION INFORMATION (CONT.) Bias Voltage and Temperature Characteristics of Ceramic Capacitors Generally, a ceramic capacitor has both a temperature characteristic and a voltage characteristic. Please consider both characteristics when selecting the part. The B curves are the recommended characteristics. CAPACITANCE ...

Page 12

TK717xxS APPLICATION INFORMATION (CONT.) As shown in the figure below, several components are required to discharge the charge in the output side capacitor in a typical regulator. On/Off Control Because the external electrical discharge circuit is unnecessary with the TK717xxS, ...

Page 13

SOT23 Voltage Code 0.95 0.95 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 Toko America, Inc. ...

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