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)