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KR52S028M中文资料

500mA POWER LOW DROPOUT REGULATOR

The KR52SXXXM/F is an efficient linear voltage regulator with very low dropout voltage(Typically 10mV at light loads and 350mV at 500mA)

The KR52SXXXM/F can be enabled, or shut down by a CMOS or TTL

compatible signal. When disabled. power consumption drops nearly to zero.Dropout ground current is minimized to help prolong battery life. Other key

features include reversed battery protechion, current limiting, over temperature shutdown, and low noise performance with an ultra-low-noise option

FEATURES

High Output Voltage Accuracy : 1%Low Quiescent Current. : I Q(OFF)=3

Very Low Ground Current : 4.0mA(I OUT = 300mA)Low Dropout Voltage : 350mV(I OUT =500mA)Built-in ON/OFF control Terminal

Built -in Over Current , Over Heat Protection Function Reverse-Battery Protection

APPLICATIONS

Laptop, notebook, and palmtop computers Cellular telephones and battery-powered equipment Consumer and personal electronics

PC Card VCC and VPP regulation and switching SMPS post-regulator/dc-to-dc modules High-effciency linear power supplies

LINE-UP

Fig. 1 BLOCK DIAGRAM

OUT V

C

Fig. 2 TEST CIRCUIT / APPLICATION CIRCUIT

MARKING

MARKING

< SOT-89-5 >

< TSV >

MAXIMUM RATINGS (Ta=25)

ELECTRICAL CHARACTERISTICS

(Unless otherwise specified, V IN=V OUT+1V, I OUT =100, C OUT =4.7, Tj=25)

100I O 0.5A

=V OUT+1V~12V

=100

OUT

=50mA

=150mA

=500mA

=50, C=2.2

= 470pF rms

V

=2.0V

V

=100

=50

=150

=500

A

5

15107.5

2.5

Fig. 1 I GND - I O

Fig. 2 I q - V IN

316

410121468I O (mA) V D (m V )

400

500

200

300

100

FREQUENCY f (KHz)

R I P P L E R E J E C T I O N R .R (d B )

809070020101003040506010105

10101010Fig. 6 f - R.R

1.51.0

2.0

3.02.5

3.500.50

400200600700740760780

300100500V O U T (V )

Fig. 5 V OUT - I OUT

I OUT (mA)

I G N D (m A )

V IN (V)

132

1.5

2.5

0.5

Fig. 7 V OUT - TEMP

Fig. 8 VENH - TEMP

I G N D (m V )

Fig. 9 I GND

- TEMP

V O (V )

-4040

1401200

-20

20

10060

80160

80406070

90302010500

TEAMPERATURE ( C)TEAMPERATURE ( C)

TEAMPERATURE ( C)

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