CS5205

CS5205 FCI

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Technical content

CS-5205 5A Low Dropout Positive V oltage Regulator 00000 000000000000000000 0000 00000 The CS-5205 series of positive adjustable and fixed regulators are designed to provide 5A with higher efficiency than currently available devices. All internal circuitry is designed to operate down to 500 mV input to output differential and the dropout voltage is fully specified as a function of load current. Dropout voltage of the device is 100 mV at light loads and rising to 500 mV at maximum output current. A second low current input is required to achieve this dropout. The CS5205 can also be used as single supply device (3 pin version). On-chip trimming adjusts the reference voltage to 1%. Current limit is also trimmed, minimizing the stress on both the regulator and power source circuitry under overload conditions. The CS-5205 series are ideal to power the next generation of advanced microprocessor on mother- bords where both 5V and 3.3V supplies are available. Adjustable or Fixed Output. Output Current of 5A. Low Dropout, 500 mV at 5A Output Current. 0.015% Line Regulation. 0.01% Load Regulation. 100% Thermal Limit Burn-ln. Fast Transient Response. Remote Sense.

FEATURES

Lea d Temp erat ure( Sold erin g, 10 sec ) -65 to 15 0 300 Uni ts W V Par ame ter Pow er Diss ipat ion Inpu t Voltage Vpo wer Vco ntro l Ope ratin g Junc tion Temper atur e Rang e Con trol Se ctio n Pow er Trans isto r Max imu m Inte rnal ly Limi ted 0 to 125 0 to 150 Absolute Maximum Ratings

DESCRIPTION

3 LEAD TO-220

5 LEAD TO-220

3.3V 2.5V@5A 124 124 0.1 F 100 F 10 F 10V 300 F Typical application data 2.5V,5A regulator Load VCONTROL VPOWER V =V (1+R2/R1)+I R2OUT REF ADJ VSENSE VOUT CS5205 Adjust

Electrical Characteristics(Note 1) Electrical Characteristics at I =0 mA and T =+25 unless otherwise specified.LOAD J The * denotes the specifications which apply over the full temperature range. Note 1:Unless otherwise specified V = V . For CS5205(adj) V = 0Vout sense adj Note 2:For the adjustable device the minimum load current is the minimum current required to maintain regulation. Normally the current in the resistor divider used to set the output voltage is selected to meet the minimum load current requirement. Note 3:The control pin current is the drive current required for the output transistor. This current will track output current with a ratio of about 1:100. Note 4:The dropout voltage for the CS5205 is caused by eithe r minimum contro l voltag e o r minimum powe r voltage. The specifications represent the minimum input/output voltage required to maintain 1% regulation. OOOO OOOO OOOO Parameter Device Min Max UnitsTypTest Conditions Reference V oltage V 2.75V,V 2V,I =10mACONTROL = POWER = LOAD V 2.7V to 15V,CONTROL = V 3.3V to 5.5V, ILOAD =10mA to5 APOWER = V =4V,V =2VCONTR OL POWER V =3V,V =2.3V ,I =0mA to5 ACONTR OL POWER LOAD V =5V,V =3.3VCONTR OL POWER V =4V,V =3.3V ,I =0mA to5ACONTR OL POWER LOAD V =6V,V =4VCONTR OL POWER V =5V,V =4.3V , =0mA to5 ACONTR OL POWER ILOAD V =5.5V ,V =3.5VCONTR OL POWER V =4.5V ,V =3.8V ,I =0mA to5 ACONTR OL POWER LOAD V =7.5V ,V =5.5VCONTR OL POWER V =6.5V ,V =5.8V ,I =0mA to5 ACONTR OL POWER LOAD I =10mA,(1.5V+ V ) V 15V,LOAD OUT CONTROL 0.8V (V -V ) 5.5VPOWER OUT V =V +2.5V, V =V +0.8V,CONTROL OUT POWER OUT I =10mA to 1ALOAD V =V +2.5V, V =V +0.8V,CONTROL OUT POWER OUT IL =10mA to 5 AOAD V =V +2.5V, V =V +0.8V,CONTROL OUT POWER OUT I =10mA to 5ALOAD V =2.75V, V =2.05 V,CONTROL POWER I =10mALOAD V =V =V +2.5V ,V =1VCONTR OL POWER OUT RIPPLE P-P , I =2.5ALOAD V =V +0.8V, I =10mAPOWER OUT LOAD V =V +0.8V, I =5APOWER OUT LOAD V =V +2.5V, I =10mAPOWER OUT LOAD V =V +2.5V, I =5APOWER OUT LOAD (V -V )=3VIN OUT V =5V,V =3.3V, V =0VCONTROL POWER ADJ V =5.8V ,V =3.8VCONTR OL POWER V =4.8V ,V =4.1V ,I =0mA to5 ACONTR OL POWER LOAD V =5.35V ,V 3.35VCONTR OL POWER = V =4.4V ,V 3.7V,I =0mAto5 ACONTR OL POWER = LOAD CS5205 CS5205 -1.5 CS5205 -2.5 CS5205 -2.85 CS5205 -3.0 CS5205 -3.3 CS5205 -3.5 CS5205 -5.0 All All All All All All All CS5205 1.238 1.250 1.262 1.230 1.250 1.270 1.485 1.475 1.500 1.500 1.515 1.525 2.475 2.460 2.500 2.500 2.525 2.540 2.821 2.805 2.850 2.850 2.879 2.895 2.970 2.950 3.000 3.000 3.030 3.050 3.267 3.247 3.300 3.300 3.333 3.353 3.465 3.445 3.500 3.500 3.535 3.555 4.950 4.920 5.000 5.000 0.04 0.20 0.08 0.40 135 6 10 50 120 6.8 0.003 1.00 1.15 1.15 1.30 0.10 0.55 0.17 0.70 5.050 5.080 5.5 CS5205 CS5205 TA=25 ,30ms pulse Note 4 CS5205-1.5/ -2.5/-2.85 -3.0/-3.3/-3.5 -5.0 Output V oltage Line Regulation Load Regulation Minimum Load Current (Note 2) Control Pin Current (Note 3) Ground Pin Current Adjust Pin Current Current Limit Ripple Rejection Therm al Regula tio n Dropout V oltage Control lnput (V - V )CONTROL OUT Power lnput (V - V )POWER OUT V V V V V V V V V V mA mA A mA A dB %/W CS-5205 5A Low Dropout Positive V oltage Regulator

Pin Functions (5-Lead) Block Diagram Sense (P in 1) : T his pi n is the po sitive side of th e reference voltage. W ith thi s p in it is possible t o K elvin Sense the ou tput v oltage at the loa d. Adjust 0000000000000000 00000000 000000 (P in 2) : T his pin is the ne gative side of the reference voltage. Adding a small bypass capacitor from the Adjust pin to gro und improves the tra nsient response. For fix ed voltage de vices t he Adjust pin is als o b rought out to all ow the use r to ad d a by pass capacitor. GND (Pin 2): For fixed voltage device this is the bottom of the res istor divider that set s the output voltage. V (Pin 5): T his pin is the co llector of the po werPOWER transistor. The ou tput l oad cu rrent i s s upplied thr ough t his pin. The vo ltage a t t his pin mu st be 0.5V gre ater tha n t he output vo ltage f or the de vice to reg ulate.0000000000000000 000 V (Pin 4): This pin is the supply pin for the controlCONTROL circuitry. T he current f low int o t his pin wi ll b e a bout 1 % of the ou tput c urrent. T he voltage at th is pin m ust be 1. 3V greater th an the ou tput v oltage for th e device to re gulate. Output (Pin 3): This is the power output of the de vice. V CONTROL VOUT SENCE FOR FIXED VOLTAGE voltage For adjustable DEVICE device GND ADJ 1 VPOWER CS-5205 5A Low Dropout Positive V oltage Regulator

For most low dropout applications the power dissipation will be less than 12W. The power in the device is made up of two components: the power in the output transistor and the power in the control circuit. The power in the control circuit is negligible. The power in the control circuit is equal to: PCONTROL=(VCONTROL - VOUT)(ICONTROL) where ICONTROL is equal IOUT/100(typ) The power in the output transisto r is equal to: POUTPUT=(VPOWER-VOUT)(IOUT) 000000000000000000000000000 000000000000000000000000000000000 000000000 00000000000 000000000000000000 0000000000000000000 0000000000000 CS-5205 5A Low Dropout Positive V oltage Regulator The total power is equal to: PTOTAL=PCONTROL+POUTPUT Junction-to-case thermal resistance is s pecified from the IC junction to t he b ottom of the case dire ctly belo w t he d ie. This is t he lowest resistance path for the heat flow. In orde r to e nsure the bes t po ssible th ermal fl ow this area of the package to the hea t si nk proper mounting is required. Thermal com pound a t th e c ase-to-heat s ink interface is recommended. A ther mally co nductive spac er c an b e us ed, if th e ca se o f th e de vice mus t be elec trically isolated, but its added c ontribution t o t hermal resistance has to be considered. This is due to the lower maximum junction temperature in the control section. At power levels above 12W the temperature gradient will be greater than 25C a nd t he maximum ambient temperature will be determined by the power section. In both cases the jumction temperature is determined by the total power dissipated in the device.

CS5205ST-1.5 CS5205T1-1.5 CS5205DP-1.5 CS5205T-2.5 CS5205T -2.5 CS5205DP-2.5 CS5205T-2.85 CS5205T -2.85 CS5205DP-2.85 CS5205T-3 CS5205T1-3 CS5205DP-3 CS5205T-3.3 CS5205T1-3.3 CS5205DP-3.3 CS5205T-3.5 CS5205T1-3.5 CS5205DP-3.5 CS5205T-5 CS5205T1-5 CS5205DP-5 TO-220 TO-220-5 TO-263 TO-220 TO-220-5 TO-263 TO-220 TO-220-5 TO-263 TO-220 TO-220-5 TO-263 TO-220 TO-220-5 TO-263 TO-220 TO-220-5 TO-263 TO-220 TO-220-5 TO-263 TO-220 TO-220-5 TO-263 Adj Adj Adj 1.5V 1.5V 1.5V 2.5V 2.5V 2.5V 2.85V 2.85V 2.85V 3.3V 3.3V 3.3V 3.5V 3.5V 3.5V Output Voltage Package CS-5205 5A Low Dropout Positive V oltage Regulator