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Part: KA78RL00D
Category:
Power Management
-> Regulators
-> Linear Regulators
-> LDO (Low Drop Out)
Description: 0.1A Adjustable Low Dropout Voltage Regulator (LDO)
Company: Fairchild Semiconductor
Datasheet: Download KA78RL00D datasheet File size : 429 kB
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www.fairchildsemi.com
KA78RL00
Adjustable Micro Power Voltage Regulator
Features
· · · · · · · · Low Quiescent Current Low Dropout Voltage Low Temperature Coefficient Tight Line and Load Regulation Guaranteed 100mA Output Current Internal Short Current & Thermal Limit Error Signals of Output Dropout (8 pin Versions Only) External Shut-down ( 8 pin Versions Only)
Description
The KA78RLOO is an adjustable micro power voltage regulator suitable for use in battery-powered systems. This regulator has various functions such as alarm which warns of a low output voltage, often due to falling batteries on the input, the external shutdown which enables the regulator to be switched on and off, current and temperature limiting.
8-SOP
1
Internal Block Diagram
OUT(1)
IN PU T(8)
+
PROGR AM (2)
ER ROR AMPLIFIER
+
FEE DBACK( 7)
C1 F ROM EXTERNAL INPUT
SHUTDOW N(3)
+
+ OFFSE T AP(6)
SCP
ERROR ER ROR COMPARATTO COMPAR A OR
T 1. 25V +
R
R EFER EN CE TO EXTERNAL INPUT
GROU ND(4)
ERROR (5)
Rev. 1.0.0
©2001 Fairchild Semiconductor Corporation
KA78RL00
Absolute Maximum Ratings
Parameter Input Supply Voltage Power Dissipation Thermal Resistance Junction-Air Storage Temperature Range Operating Junction Temperature Range Symbol V IN PD RJA TSTG TOPR Value -0.3 ~ +30 Internally Limited 127.5 -65 ~ +150 -40 ~ +125 Unit V W °C/W °C °C
2
KA78RL00
Electrical Characteristics
(Refer to the test circuit, Ta = 25 °C, unless otherwise specified ) Parameter ALL VOLTAGE OPTIONS Output Voltage Temperature Coefficient Line Regulation (Note2) Load Regulation (Note2) Dropout Voltage Ground Current Current Limit 8-PIN VERSIONS ONLY Reference Voltage ERROR COMPARATOR Output Low Voltage High Threshold Voltage Low Threshold Voltage Hysteresis SHUTDOWN INPUT Shutdown Threshold Range Shutdown Input Current VSD ISD (Note5) VSD = 2.4V VSD = 28V 0.6 1 .3 30 450 2.0 100 750 V uA uA VOL VTH VTL VHYS VIN = (Vo - 0.5)V, IOL =400uA (Note4) (Note4) (Note4) 25 150 60 75 15 400 140 mV mV mV mV VREF VREF (Note3) 1.235 1.26 1.285 1.225 1.26 1.295 V V V/T V V VD IG IC L (Note1) (Vo + 1)V VIN 28V IL = 50mA 100uA IL 100mA IL = 100uA IL = 100mA IL = 100uA IL = 100mA VO = 0V 110 50 165 0 .4 0.3 150 600 140 7 220 ppm/°C % % mV mV uA mA mA Symbol Conditions Min. Typ. Max. Unit
Note : 1. Output or reference voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range. 2. Regulation is measured at constant junction temperature , using pulse testing with a low duty cycle. 3. Vref Vout (Vin - 1V), 2.5V Vin 28V, 100uA IL 100mA, TA TAMAX . 4. Threshold and hysteresis are expressed in terms of voltage differential at the Feedback terminal below the normal reference . To express these thresholds in terms of output voltage change , multiply by the error amplifier gain = VO / VREF = (R1 + R2) / R2 . 5. Vshutdown 0.6 V , VOUT =ON , Vshutdown 2.0 V, VOUT = OFF.
3
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