View KA78R05_125731.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

www.fairchildsemi.com
KA78R05
Low Dropout Voltage Regulator
Features
* * * * * 1A / 5V Output low dropout voltage regulator TO220 Full-Mold package (4PIN) Overcurrent protection, Thermal shutdown Overvoltage protection, Short-Circuit protection With output disable function
Description
The KA78R05 is a low-dropout voltage regulator suitable for various electronic equipments. It provides constant voltage power source with TO-220 4 lead full mold package. Dropout voltage of KA78R05 is below 0.5V in full rated current(1A). This regulator has various function such as peak current protection, thermal shut down, overvoltage protection and output disable function.
TO-220F-4L
1
1. Vin 2. VO 3. GND 4. Vdis
Internal Block Diagram
Q1
Vin
1
2
Vo
THERMAL SHUTDOWN
OVERVOLTAGE PROTECTION
BANDGAP REFERENCE
+ R1
SOA PROTECTION HIGH / LOW Vdis 4 + OUTPUT ON / OFF
R2 1.4V
SHORT-CIRCUIT SHORTCIRCUIT
PROTECTION
3 GND
Rev. 1.0.4
(c)2001 Fairchild Semiconductor Corporation
KA78R05
Absolute Maximum Ratings
Parameter Input Voltage Disable Voltage Output Current Power Dissipation 1 Power Dissipation 2 Junction Temperature Operating Temperature Thermal Resistance, Junction-to Case (Note2) Thermal Resistance, Junction-to-Air (Note2) Thermal Shutdown Temperature Symbol Vin Vdis Io Pd1 Pd2 Tj Topr Rjc Rja Ttsd Value 35 35 1.0 1.5 15 +150 -20 ~ +80 4.31 48.83 150 Unit V V A W W C C C/W C/W C Remark No Heatsink With Heatsink -
Electrical Characteristics
(Vin = 7V, Io = 0.5A, Ta = 25 C, unless otherwise specified) Parameter Output Voltage Load Regulation Line Regulation Ripple Rejection Ratio Dropout Voltage Disable Voltage High Disable Voltage Low Disable Bias Current High Disable Bias Current Low Quiescent Current Symbol Vo Rload Rline RR Vdrop VdisH VdisL IdisH IdisL Iq 5mA < Io < 1A 6V < Vin < 12V note1 Io = 1A Output Active Output Disabled Vdis = 2.7V Vdis = 0.4V Io = 0A Conditions Min. 4.88 45 2.0 Typ. 5 0.1 0.5 55 Max. 5.12 2.0 2.5 0.5 0.8 20 -0.4 10 Unit V % % dB V V V A mA mA
Note: 1.These parameters, although guaranteed, are not 100% tested in production. 2. Junction -to -case thermal resistance test enviroments. -. Pneumatic heat sink fixture. -. Clamping pressure 60psi through 12mm diameter cylinder. -. Thermal grease applied between PKG and heat sink fixture
2
KA78R05
Typical Perfomance Characteristics
7 50
Output voltage Vo(V)
6 5
RL= 8
i Quescent current Iq(mA)
40
4 3 2 1 0 0 5 10 15
RL=5
30
20
10
RL=
0
8
0
5
10
15
Input voltage Vin (V)
Input voltage Vin (V)
Figure 1. Output Voltage vs. Input Voltage
Figure 2. Quiescent Current vs. Input Voltage
7
5.06
Output voltage Vo(V)
5 4 3 2 1 0
Output voltage Vo(V)
0 0.5 1 1.5 2 2.5 3
6
5.04 5.02 5.00 4.98 4.96 4.94 4.92 -25
0
Disable voltage Vdis (V)
75 25 50 TEMPERATURE Tj(oC )
100
125
Figure 3. Output Voltage vs. Disable Voltage
Figure 4. Output Voltage vs. Temperature(Tj)
10
0.6
i Quescent current Iq(mA)
Dropout voltage Vdrop(V)
8
0.5 0.4 Io=3A 0.3 2.0A 0.2 0.1 0.5A 1.0A
6
4
2
0
-25
0
25
50
75
100
125
0 -25
0
Junction temperature Tj(oC)
Junction temperature Tj(oC)
25
50
75
100
125
Figure 5. Quiescent Current vs. Temperature(Tj)
Figure 6. Dropout Voltage vs. Junction Temperature
3
KA78R05
Typical Perfomance Characteristics (Continued)
20
100
Power dissipation PDD(W)
Relative output voltage(%)
80 60
15
10
40
5
20
0 -25
0
0
25
50
75
100
125
0
0.5
1.0
1.5
2.0
2.5
3.0
a TEMPERATURE TJ(oC)
Output Current(A)
Figure 7. Power Dissipation vs. Temperature(Ta)
Figure 8. Overcurrent Protection Characteristics (Typical Value)
4
KA78R05
Typical Application
Vin 1
+
Vo 2
+
3 GND 4 Vdis Disable Signal
Figure 1. Application Circuit
* Ci is required if regulator is located an appreciable distance from power supply filter. * Co improves stability and transient response.(Co > 47F)
5
KA78R05
Mechanical Dimensions
Package Dimensions in millimeters
TO-220F-4L
6
KA78R05
Mechanical Dimensions (Continued)
Package Dimensions in millimeters
TO-220F-4L(Forming)
7
KA78R05
Mechanical Dimensions (Continued)
Package Dimensions in millimeters
TO-220F-4L(Short Lead)
NOTE
1. THESE DIMENSIONS DO NOT INCLUDE MOLD PROTRUSION. 2. ( ) IS REFERENCE 3. [ ] IS ASS'Y OUT QUALITY
TITLE
UNIT
PKG OUTLINE TO-220F-4L , SHORT LEAD
TOLERANCE mm N/A SPEC NO. SCALE 5:1
D
DWG. NO.
8
KA78R05
Ordering Information
Product Number KA78R05TU KA78R05YDTU KA78R05TSTU Package TO-220F-4L TO-220F-4L(Forming) TO-220F-4L(Short Lead) -20C to + 80C Operating Temperature
9
KA78R05
DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user.
www.fairchildsemi.com 12/18/01 0.0m 001 Stock#DSxxxxxxxx 2001Fairchild Semiconductor Corporation
2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.

▲Up To Search▲

Price & Availability of KA78R05

	To Download KA78R05 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .