LOW RIPPLE VOLTAGE REGULATOR WITH EXTERNAL TRANSISTOR NO. EA-043-0204 OUTLINE ! " ! " #$ % % % ! &% ! ! & # % % %&' &'# " " ! % "% "# & ! & % && !()' ! *" * #+,-. * # FEATURES * / 0" ###########################################"#,12' * " ###############################################################"#1#32' * 4' "5 ####################################6+#17 * 4 ##################################################"#819:%;3*4< * 0) 5 ###################################################"#1#35:;311&'!$ # * 0& ) % ################################################"#6311&:= * 40 ###################################################"#1#17:5 * 5 ############################################################## % 1#35 % 3#+5 8#15 * 0&% ######################################"#>&'!0& APPLICATIONS * ( % " ?& * && ! & !5 * ( % & 1 RN5RF BLOCK DIAGRAM RN5RFxxA RN5RFxxB 4 EXT VDD 2 4 3 VOUT EXT VDD 2 3 - - + + Vref VOUT Vref Current Limit CE 5 Current Limit 1 GND CE 5 1 GND SELECTION GUIDE ! "! *" "% @ ? # & " & A B( & Code Contents 5 -5.A %1#35 %3#+58#15 # ) % '" 'AC0D " 9AC4D " ) %( *" 'A A' "% & 2 ) % " $#!0- % % !" #. RN5RF PIN CONFIGURATION SOT-23-5 5 4 CE/CE EXT (mark side) GND VDD VOUT 1 2 3 PIN DESCRIPTION Pin No. Symbol Pin Description 3 E) + 5 ( , 5 ( F $G $ ) (-. $ $ E ( $ ( ABSOLUTE MAXIMUM RATINGS Symbol Item Rating Unit 3+ 5 5 5 5 5 % $:$( 1#,5H1#, 5 5 $G5 1#,5H1#, 5 $G 1 &' ( ( ) 31 &I & F1H> = & H3+ = ABSOLUTE MAXIMUM RATINGS ' && & & % " # ! % "& & & "# & && & " & & # " "&"% & # 3 RN5RF ELECTRICAL CHARACTERISTICS * RN5RFxxA ;+= Symbol Item Conditions Typ. Max. ''; ' ' ' ;1&' x1#J> x3#1+ 5 5 55;3#15 $G 5;F#15!5 ;+#15 55;3#15 3#1 > Unit 5 ' 3 &' 81 &5 5: 0 5 ) 5 ;311&'!;1&' 1#3 1#+ 5 " 55;3#15 ,1 1 2' " " 5;31#15 1#31 3#11 2' 1# 2' 1#,1 7:5 3&'311&' 81 1#13 $G0 * ;1&' 5:5 0 5 5 31 5 5 $G5 31 5 5: 5H1#55315 %;3*4<! 1#5 5 & ;31&' %% F1=>= 1#1 81 55;3#15 9 6311 &:= F ( % $ 5 CE 5 C4D 3# 5 5 5 CE 5 C0D 1#11 1#+ 5 The output current depends on the performance of external PNP transistor. Use External PNP transistor of a low saturation type, with an hFE between 100 and 300. *) 1#11 *1) 4 Min. With respect to Test Circuit, refer to Typical Application. RN5RF * RN5RFxxB ;+= Symbol Item Conditions ' ;1&' x1#J> x3#1+ 55;3#15 $G 5;F#15!5 ;+#15 5 ) 5 " " " Max. ' 5 0 Typ. 55;3#15 5 5: Min. 55;3#15 3&'311&' 3#1 5B5;3#15 ;1&' 1#13 ' &' 81 &5 1#3 1#+ 5 ,1 1 2' 1#31 3#11 2' 1# 2' 1#,1 7:5 $G0 * ;1&' 5 3 81 ;311&' 5;31#15 > Unit 5:V 0 5 5 31 5 5 $G5 31 5 5: 5H1#55315 1#11 %;3*4<! 1#5 81 5B5;3#15 5 & ;31&' %% F1=>= ( % $ 1#1 9 6311 &:= F 5 $5 C4D 3# 5 5 5 $5 C0D 1#11 1#+ 5 *1) The output current depends on the performance of external PNP transistor. Use External PNP transistor of a low saturation type, with an hFE between 100 and 300. *) With respect to Test Circuit, refer to Typical Application. 5 RN5RF OPERATION PNP Tr RN5RFxxA VDD IN 4 EXT VOUT 2 OUT 3 - Ra + C CL Rb Vref Current Limit CE GND 5 GND 1 GND !5 5 "% * ! & % " &% % (( 5 # % # & " & * # & ! & & " !5& # Notes on selecting external components -3. (( 9 %% ! % (( # $ (( 5- . 311 ,11 # -+. & ! & & % % # ! - &". %312% & # & " * & $ ! %" % ?" # 6 RN5RF TEST CIRCUITS PNP 4 PNP EXT 4 VDD IN VOUT 2 3 IN VOUT VDD 2 3 RN5RFxxA 10F 10F 1 1 GND GND 5 5 CE CE Basic Test Circuit Test Circuit for Supply Current PNP PNP 4 IN OUT ISS IOUT 10F RN5RFxxA 10F OUT EXT EXT 4 VOUT VDD 3 2 OUT VOUT VDD IN 3 2 IOUT 10F RN5RFxxA EXT RN5RFxxA 10F 1 10F 1 GND GND P.G OUT 5 5 CE Test Circuit for Ripple Rejection and Line CE Test Circuit for Load Transient Response Transient Response 7 RN5RF TYPICAL CHARACTERISTICS 1) Output Voltage vs. Input Voltage (Topt=25C) RN5RF50A 5.20 3.00 5.00 Output Voltage VOUT(V) Output Voltage VOUT(V) RN5RF30A 3.20 2.80 2.60 IOUT=0mA 2.40 IOUT=100mA IOUT=500mA 2.20 2.00 4.80 4.60 IOUT=0mA 4.40 IOUT=100mA IOUT=500mA 4.20 4.00 2 3 4 5 6 7 8 9 10 4 5 6 Input Voltage VIN(V) 2) 9 10 RN5RF50A VIN=4V 3.05 3.00 2.95 2.90 2.85 VIN=6V 5.10 Output Voltage VOUT(V) Output Voltage VOUT(V) 3.10 2.80 5.05 5.00 4.95 4.90 4.85 4.80 0 100 200 300 400 500 0 Output Current IOUT(mA) 100 200 300 400 500 Output Current IOUT(mA) Dropout Voltage vs. Output Current RN5RF30A RN5RF50A 0.50 0.50 Topt=-40 Dropout Voltage VDIF(V) Dropout Voltage VDIF(V) Topt=-40 Topt=25 0.40 Topt=85 0.30 0.20 0.10 0.00 Topt=25 0.40 Topt=85 0.30 0.20 0.10 0.00 0 100 200 300 400 Output Current IOUT(mA) 8 8 Output Voltage vs. Output Current (Topt=25C) RN5RF30A 3) 7 Input Voltage VIN(V) 500 0 100 200 300 400 Output Current IOUT(mA) 500 RN5RF 4) Output Voltage vs. Temperature RN5RF30A 3.05 3.00 2.95 2.90 -50 -25 0 25 50 75 VIN=6V,IOUT=10mA 5.10 Output Voltage VOUT(V) 3.10 Output Voltage VOUT(V) RN5RF50A VIN=4V,IOUT=10mA 5.05 5.00 4.95 4.90 -50 100 -25 Temperature Topt( ) 5) 25 50 75 100 Temperature Topt( ) Supply Current vs. Input Voltage (Topt=25C) RN5RF30A RN5RF50A IOUT=0mA 100 90 Supply Current ISS(A) Supply Current ISS(A) IOUT=0mA 100 90 80 70 60 50 40 30 20 10 80 70 60 50 40 30 20 10 0 0 0 2 4 6 8 10 0 2 Input Voltage VIN(V) 4 6 8 10 Input Voltage VIN(V) Supply Current vs. Temperature RN5RF30A RN5RF50A VIN=4V,IOUT=0mA 40 30 20 10 0 -50 -25 0 25 50 Temperature Topt( ) 75 100 VIN=6V,IOUT=0mA 50 Supply Current ISS(A) 50 Supply Current ISS(A) 6) 0 40 30 20 10 0 -50 -25 0 25 50 75 100 Temperature Topt( ) 9 RN5RF 7) Ripple Rejection vs. Frequency (Topt=25C) RN5RF30A 80 RN5RF50A VIN=4Vdc+0.5Vp-p,IOUT=100mA,CL=10F 80 70 Ripple Rejection (dB) 70 Ripple Rejection (dB) VIN=6Vdc+0.5Vp-p,IOUT=100mA,CL=10F 60 50 40 30 20 60 50 40 30 20 10 10 0 0.01 0.1 1 10 0 0.01 100 0.1 Frequency (kHz) 100 Frequency (kHz) Line Transient Response (Topt=25C) 4 8 3.2 7 3.1 3 3 Output Voltage 2 2.9 1 2.8 0 -50 -25 0 25 50 75 Input Voltage VIN(V) Input Voltage 5 3.3 Output Voltage VOUT(V) 6 Input Voltage VIN(V) RN5RF50A IOUT=300mA,CL=10F IOUT=300mA,CL=10F Input Voltage 6 5.1 5 5 Output Voltage 4 2 -50 -25 0 25 50 75 4.7 100 125 150 Time T(s) Load Transient Response (Topt=25C) RN5RF30A RN5RF50A 3.2 Output Current 0 -100 3.1 3 Output Voltage -200 2.9 -300 2.8 -400 -100 0 100 200 Time T(s) 300 2.7 400 VIN=6V,CL=10F 200 Output Current IOUT(mA) 100 3.3 Output Voltage VOUT(V) VIN=4V,CL=10F 200 Output Current IOUT(mA) 4.9 4.8 Time T(s) 9) 5.2 3 2.7 100 125 150 5.3 Output Voltage VOUT(V) RN5RF30A 10 10 100 5.3 5.2 Output Current 0 -100 5.1 5 Output Voltage -200 4.9 -300 4.8 -400 -100 0 100 200 Time T(s) 300 4.7 400 Output Voltage VOUT(V) 8) 1 RN5RF TYPICAL APPLICATION PNP Tr EXT IN VDD RN5RFxxA OUT VOUT + + Cap. Cap. CE GND Components Transistor: 2SB766A Capacitor: 10F (Tantalum type) 11