www.fairchildsemi.com KA317 3-Terminal Positive Adjustable Regulator Features Description • • • • • • This monolithic integrated circuit is an adjustable 3-terminal positive voltage regulator designed to supply more than 1.5A of load current with an output voltage adjustable over a 1.2V to 37V. It employs internal current limiting, thermal shut down and safe area compensation. Output Current in Excess of 1.5A Output Adjustable Between 1.2V and 37V Internal Thermal Overload Protection Internal Short Circuit Current Limiting Output Transistor Safe Area Compensation TO-220 Package TO-220 (Dual Gauge) Output 1 1. Adj 2. Output 3. Input Internal Block Diagram Vin 3 Input + - Voltage Reference Protection Circuitry Rlimit 2 Vo Output 1 Vadj Rev. 1.0.3 ©2011 Fairchild Semiconductor Corporation KA317 Absolute Maximum Ratings Parameter Symbol Value Unit Input-Output Voltage Differential VI - V O 40 V Lead Temperature TLEAD 230 °C Power Dissipation PD Internally limited W RθJC 5 °C/W Tj 0 ~ +125 °C TSTG -65 ~ +125 °C ΔVo/ΔT ±0.02 %/°C Thermal Resistance Junction to Case Operating Junction Temperature Range Storage Temperature Range Temperature Coefficient of Output Voltage Electrical Characteristics (VI-VO= 5V, IO= 0.5A, 0°C ≤ TJ ≤ +125°C, IMAX = 1.5A, PDMAX = 20W, unless otherwise specified) Parameter Line Regulation (Note1) Load Regulation (Note1) Adjustable Pin Current Symbol Rline Rload Conditions Min. Typ. Max. Unit TA = +25°C 3V ≤ VI - VO ≤ 40V - 0.01 0.04 %/V 3V ≤ VI - VO ≤ 40V - 0.02 0.07 %/V TA = +25°C, 10mA ≤IO ≤ IMAX VO< 5V VO ≥ 5V - 18 0.4 25 0.5 mV %/VO 10mA ≤ IO ≤ IMAX VO < 5V VO ≥ 5V - 40 0.8 70 1.5 mV %/VO - 46 100 μA - 2.0 5 μA 1.20 1.25 1.30 V - 0.7 - %/VO - 3.5 12 mA 1.5 - 2.2 0.3 - A A - 0.003 0.01 %/VO 66 60 75 - dB dB - 0.3 1 % IADJ - Adjustable Pin Current Change ΔIADJ 3V ≤ VI - VO ≤ 40V 10mA ≤ IO ≤ IMAX PD ≤ PMAX Reference Voltage VREF 3V ≤ VIN - VO ≤ 40V 10mA ≤ IO ≤ IMAX PD ≤ PMAX Temperature Stability (Note3) - STT Minimum Load Current to Maintain Regulation IL(MIN) VI - VO = 40V Maximum Output Current IO(MAX) VI - VO ≤ 15V, PD ≤ PMAX VI - VO ≤ 40V, PD ≤ PMAX TA=25°C RMS Noise, % of VOUT (Note3) eN TA= +25°C, 10Hz ≤ f ≤ 10kHz Ripple Rejection (Note3) RR VO = 10V, f = 120Hz without CADJ CADJ = 10μF (Note2) Long-Term Stability, TJ = THIGH ST TA = +25°C for end point measurements, 1000HR Note : 1. Load and line regulation are specified at constant junction temperature. Change in VD due to heating effects must be taken into account separately. Pulse testing with low duty is used. (PMAX = 20W) 2. CADJ , when used, is connected between the adjustment pin and ground. 3. These parameters, although guaranteed, are not 100% tested in production. 2 KA317 ADJUSTMENT CURRENT(uA) OUTPUT VOLTAGE DEVIATION(%) Typical Performance Characteristics TEMPERATURE (°C) TEMPERATURE (°C) Figure 2. Adjustment Current REFERENCE VOLTAGE(V) INPUT-OUTPUT DIFFERENTIAL(V) Figure 1. Load Regulation TEMPERATURE (°C) Figure 3. Dropout Voltage TEMPERATURE (°C) Figure 4. Reference Voltage 3 KA317 Typical Application VI Input KA317 Vo Output Vadj R1 Ci 0.1uF 240Ω Iadj R2 Co 1uF adj VO = 1.25V (1+R2/R1)+IadjR2 Figure 5. Programmable Regulator Ci is required when regulator is located an appreciable distance from power supply filter. Co is not needed for stability, however, it does improve transient response. Since IADJ is controlled to less than 100μA, the error associated with this term is negligible in most applications. 4 KA317 Mechanical Dimensions Package Dimensions in millimeters TO-220 [DUAL GAUGE] 4.50 ±0.20 2.80 ±0.10 (3.00) +0.10 1.30 –0.05 18.95MAX. (3.70) ø3.60 ±0.10 15.90 ±0.20 1.30 ±0.10 (8.70) (1.46) 9.20 ±0.20 (1.70) 9.90 ±0.20 1.52 ±0.10 0.80 ±0.10 2.54TYP [2.54 ±0.20] 10.08 ±0.30 (1.00) 13.08 ±0.20 ) (45° 1.27 ±0.10 +0.10 0.50 –0.05 2.40 ±0.20 2.54TYP [2.54 ±0.20] 10.00 ±0.20 5 KA317 Ordering Information Product Number Package Operating Temperature KA317 TO-220 (Dual Gauge) 0°C to +125°C 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.v 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. 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. www.fairchildsemi.com 12/29/11 0.0m 001 Stock#DS400293 © 2011 Fairchild Semiconductor Corporation