KA278RXXC-Series. 2A Output Low Dropout Voltage Regulators. Description. Features. Internal Block Diagram.
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1 KA7RXXC-Series A Output Low Dropout Voltage Regulators Features KA7RXXC-series (//1/9/1) A/.V, V,.1V, 9V, 1V output low dropout voltage regulator TO- full-mold package (pin) Overcurrent protection, thermal shutdown Overvoltage protection, short circuit protection With output disable function KA7RAC Nominal V output without adjusting Output adjustable between 1.V and V A output low dropout voltage regulator TO- full-mold package (pin) Overcurrent protection, thermal shutdown Overvoltage protection, short circuit protection Description The KA7RXXC is a low-dropout voltage regulator suitable for various electronic equipments. It provides constant voltage power source with TO-- lead full mold package. The dropout voltage of KA7RXXC is below.v in full rated current(a). This regulator has various functions such as a peak current protection, a thermal shut down, an overvoltage protection. TO-F-L 1 1.Vin. Vo. GND. Vdis - KA7RXXC(//1/9/1) 1.Vin. Vo. GND. Vadj - KA7RAC Internal Block Diagram Vin 1 Q1 Vo Vin 1 Q1 Vo THERMAL SHUTDOWN OVERVOLTAGE PROTECTION THERMAL SHUTDOWN OVERVOLTAGE PROTECTION BANDGAP REFERENCE - + R1 BANDGAP REFERENCE - + Rin HIGH / LOW OUTPUT SOA PROTECTION SOA PROTECTION Vdis - ON / OFF + Vadj R 1.V SHORTCIRCUIT PROTECTION SHORTCIRCUIT PROTECTION Rref GND GND (KA7R//1/9/1C) (KA7RAC) Rev. 1.. Fairchild Semiconductor Corporation
2 KA7RXXC-SERIES Absolute Maximum Ratings KA7RXXC, KA7RAC Parameter Symbol Value Unit Remark Input voltage Vin V - Disable voltage KA7RXXC Vdis V - Output current Io. A - Power dissipation 1 Pd1 1. W No heatsink Power dissipation Pd 1 W With heatsink Junction temperature Tj 1 C - Operating temperature Topr - ~ C - Thermal resistance, junction-to case (note) Rθjc.9 C/W - Thermal resistance, junction-to-air (note) Rθja.1 C/W -
3 KA7RXXC-SERIES Electrical Characteristics (Vin=Note, Io=1.A, Ta= C, unless otherwise specified) Parameter Symbol Conditions Min. Typ. Max. Unit KA7RC Output voltage KA7R1C Vo V KA7R9C KA7R1C Load regulation Rload ma < Io < A -.1. % Line regulation Rline Note -.. % Ripple rejection ratio RR Note1 - db Dropout voltage Vdrop Io = A - -. V Disable voltage high KA7RXXC VdisH Output active. - - V Disable voltage low KA7RXXC VdisL Output disabled - -. V Disable bias current high KA7RXXC IdisH Vdis =.7V - - µa Disable bias current low KA7RXXC IdisL Vdis =.V ma Quiescent current Iq Io = A ma Reference voltage KA7RAC Vref V Note: 1.These parameters, although guaranteed, are not 1% tested in production.. Junction -to -case thermal resistance test environments. -. Pneumatic heat sink fixture. -. Clamping pressure psi through 1mm diameter cylinder. -. Thermal grease applied between PKG and heat sink fixture.. KA7RC : Vin = V KA7RC : Vin = 7V KA7R9C : Vin = 11V KA7R1C : Vin = 1V. KA7RC : Vin = to 1V KA7RC, KA7R1C : Vin= to 1V KA7R9C : Vin=1 to V KA7R1C : Vin = 1V to 9V -... KA7RC -..1
4 KA7RXXC-SERIES Typical Performance Characteristics KA7RC RL= RL=.Ω.7 1 Input voltage Vin (V) Figure 1. Output Voltage vs. Input Voltage Quiescent current Iq(mA) 1 RL= 1 1 Input voltage Vin(V) Figure. Quiescent Current vs. Input Voltage Disable voltage Vdis (V) Figure. Output Voltage vs. Disable Voltage Figure. Output Voltage vs. Temperature(Tj) Quiescent current Iq(mA) 1 Drop out voltage Vdrop [V] A Junction temperature Tj( o C) Junction Temp Tj [ ] Figure. Quiescent Current vs. Temperature(Tj) Figure. Dropout Voltage vs.junction Temperature
5 KA7RXXC-SERIES Typical Performance Characteristics (Continued) 1 Power dissipation PD(W) 1 1 Relative output voltage(%) Output Current(A). Figure 7. Power Dissipation vs. Temperature(Tj) Figure. Overcurrent Protection Characteristics (Typical Value).7 Output peak current Iop (A) Input-output differential voltage Vin-Vo (V) Figure 9. Output Peak Currenrt vs. Input-Output Differential Voltage
6 KA7RXXC-SERIES Typical Performance Characteristics(Continued) KA7RC 7 1 RL= RL=.Ω 1 1 Input voltage Vin (V) Quiescent current Iq(mA) 1 1 RL= 1 1 Input voltage Vin(V) Figure 1. Output Voltage vs. Input Voltage Figure. Quiescent Current vs. Input Voltage Disable voltage Vdis (V) Figure. Output Voltage vs. Disable Voltage Figure. Output Voltage vs. Temperature(Tj) Quiescent current Iq(mA) Drop out voltage Vdrop [V] A Junction temperature Tj( o C) Junction Temp Tj [ ] Figure. Quiescent Current vs. Temperature(Tj) Figure. Dropout Voltage vs.junction Temperature
7 KA7RXXC-SERIES Typical Performance Characteristics (Continued) Power dissipation PD(W) 1 1 Relative output voltage(%) Output Current(A). Figure 7. Power Dissipation vs. Temperature(Tj) Figure. Overcurrent Protection Characteristics (Typical Value).7 Output peak current Iop (A) Input-output differential voltage Vin-Vo (V) Figure 9. Output Peak Currenrt vs. Input-Output Differential Voltage 7
8 KA7RXXC-SERIES Typical Performance Characteristics (Continued) KA7R1C 7 1 RL= RL=.Ω 1 1 Input voltage Vin (V) Quiescent current Iq(mA) 1 1 RL= 1 1 Input voltage Vin(V) Figure 1. Output Voltage vs. Input Voltage Figure. Quiescent Current vs. Input Voltage Disable voltage Vdis (V) Figure. Output Voltage vs. Disable Voltage Figure. Output Voltage vs. Temperature(Tj) 1.7 Quescent current Iq(mA) Drop out voltage Vdrop [V] A Junction temperature Tj( o C) Junction Temp Tj [ ] Figure. Quiescent Current vs. Temperature(Tj) Figure. Dropout Voltage vs. Junction Temperature
9 KA7RXXC-SERIES Typical Performance Characteristics (Continued) 1 Power dissipation PD(W) 1 1 Relative output voltage(%) Output Current(A). Figure 7. Power Dissipation vs. Temperature(Tj) Figure. Overcurrent Protection Characteristics (Typical value) Ripple Rejection RR (db) 7 Tj = o C VIN = 7V 1 IO =1A VIN =.Vrms Input Ripple Frequency (KHz) Output Voltage Deviation (mv) Input Voltage (V) Time (µs) Figure 9. Ripple Rejection vs. Input Ripple Frequency Figure 1. Line Transient Response Output Voltage Deviation (V) Output Current (A) Time (µs) Output peak current Iop (A) Input-output differential voltage Vin-Vo (V) Figure 11. Load Transient Response Figure 1. Output Peak Currenrt vs. Input-Output Differential Voltage 9
10 KA7RXXC-SERIES Typical Performance Characteristics (Continued) KA7R9C 1 1 RL= RL=.Ω 1 1 Input voltage Vin (V) Quiescent current Iq(mA) 1 RL= 1 1 Input voltage Vin(V) Figure 1. Output Voltage vs. Input Voltage Figure. Quiescent Current vs. Input Voltage Disable voltage Vdis (V) Figure. Output Voltage vs. Disable Voltage Figure. Output Voltage vs. Temperature(Tj) 1.7 Quescent current Iq(mA) Drop out voltage Vdrop [V] A Junction temperature Tj( o C) Junction Temp Tj [ ] Figure. Quiescent Current vs. Temperature(Tj) Figure. Dropout Voltage vs.junction Temperature 1
11 KA7RXXC-SERIES Typical Performance Characteristics (Continued) 1 Power dissipation PD(W) 1 1 Relative output voltage(%) Output Current(A). Figure 7. Power Dissipation vs. Temperature(Tj) Figure. Overcurrent Protection Characteristics (Typical Value).7 Output peak current Iop (A) Input-output differential voltage Vin-Vo (V) Figure 9. Output Peak Currenrt vs. Input-Output Differential Voltage 11
12 KA7RXXC-SERIES Typical Performance Characteristics (Continued) KA7R1C RL= RL= Ω 1 1 Input voltage Vin (V) Figure 1. Output Voltage vs. Input Voltage Quiescent current Iq(mA) 1 1 RL= 1 1 Input voltage Vin(V) Figure. Quiescent Current vs. Input Voltage Disable voltage Vdis (V) Figure. Output Voltage vs. Disable Voltage Figure. Output Voltage vs. Temperature(Tj) 1.7 Quiescent current Iq(mA) Drop out voltage Vdrop [V] A Junction temperature Tj( o C) Junction Temp Tj [ ] Figure. Quiescent Current vs. Temperature(Tj) Figure. Dropout Voltage vs.junction Temperature 1
13 KA7RXXC-SERIES Typical Performance Characteristics (Continued) 1 Power dissipation PD(W) 1 1 Relative output voltage(%) Figure 7. Power Dissipation vs. Temperature(Tj) Output Current(A). Figure. Overcurrent Protection Characteristics (Typical Value).7 Output peak current Iop (A) Input-output differential voltage Vin-Vo (V) Figure 9. Output Peak Currenrt vs. Input-Output Differential Voltage 1
14 KA7RXXC-SERIES Typical Performance Characteristics (Continued) KA7RAC 7 1 RL= RL=.Ω 1 1 Input voltage Vin (V) Quiescent current Iq(mA) 1 1 RL= 1 1 Input voltage Vin(V) Figure 1. Output Voltage vs. Input Voltage. Figure. Quiescent Current vs. Input Voltage Quiescent current Iq(mA) Junction temperature Tj( o C ) Figure. Output Voltage vs. Temperature(Tj) * Fixed Mode (Vo=V) Figure. Quiescent Current vs. Temperature(Tj).7 Drop out voltage Vdrop [V] A Power dissipation PD(W) Junction Temp Tj [ ] Figure. Dropout Voltage vs.junction Temperature Figure. Power Dissipation vs. Temperature(Tj) 1
15 KA7RXXC-SERIES Typical Performance Characteristics (Continued) 1.7 Relative output voltage(%) Output Current(A). Output peak current Iop (A) Input-output differential voltage Vin-Vo (V) Figure 7. Overcurrent Protection Characteristics(Typical value) Figure. Output Peak Currenrt vs. Input-Output Differential Voltage 1
16 + + KA7RXXC-SERIES Typical Application KA7R//1/9/1C Vin 1 Vo Vdis GND Disable Signal Figure 1. Application Circuit Ci is required if regulator is located at an appreciable distance from power supply filter. Co improves stability and transient response.(co > 7µF) KA7RA Input 1 Vin Vo KA7RA R Output Ci GND Vadj R Co RL Vo = 1. ( 1 + R1//R R//R ) R1 = 1.kΩ, R =.kω Figure. Application Circuit (Adjustable Mode) Ci is required if regulator is located at an appreciable distance from power supply filter. Co improves stability and transient response.(co > 7µF) 1 Variation(%) Junction temperature Tj( ) Figure. Internal Resistor(R1,R) Variation vs. Temperature(Tj) Input 1 Vin Vo KA7RA Output = V Ci GND Vadj Co RL Figure. Application Circuit (Fixed Mode) 1
17 KA7RXXC-SERIES Mechanical Dimensions Package Dimensions in millimeters TO-F-L 17
18 KA7RXXC-SERIES Mechanical Dimensions (Continued) Package Dimensions in millimeters TO-F-L(Forming) 1
19 KA7RXXC-SERIES Mechanical Dimensions (Continued) Package Dimensions in millimeters TO-F-L(Short Lead) NOTE 1. THESE DIMENSIONS DO NOT INCLUDE MOLD PROTRUSION.. ( ) IS REFERENCE. [ ] IS ASS'Y OUT QUALITY TITLE PKG OUTLINE D TO-F-L, SHORT LEAD UNIT TOLERANCE SCALE mm N/A : 1 DWG. NO. SPEC NO. 19
20 KA7RXXC-SERIES Ordering Information Product Number Package Operating Temperature KA7RCTU KA7RCTU KA7R1CTU KA7R9CTU TO-F-L KA7R1CTU KA7RACTU KA7RCYDTU KA7RCYDTU - C to + C KA7R9CYDTU KA7R1CYDTU KA7RACYDTU KA7RCTSTU TO-F-L(Forming) KA7RCTSTU TO-F-L(Short Lead) KA7R1CTSTU 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.. 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. /1/.m 1 Stock#DSxxxxxxxx Fairchild Semiconductor Corporation
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