AN6541 3-pin Positive Voltage Regulator ■ Overview Unit:mm 1.4±0.1 1.4±0.25 0.8±0.2 ■ Features +0.1 2.54 • Low drop-out voltage:0.3V (typ.) • Internal short-circuit current protection • Low temperature coefficient of output voltage 2.9±0.1 8.7±0.3 6.7±0.25 ø3.7 4.5 10.5±0.5 10.4±0.5 13.6±0.25 The AN6541 is a 3-pin 9V voltage regulator which performs stable operations up to the minimum input/output voltage difference 0.3V (typ.). Stabilized fixed output voltage is obtained from unstable DC input voltage. The AN6541 can be used in power circuits with current capacitance up to 300mA. 0.45 – 0.05 2.5±0.25 4.5±0.3 1 2 3 1:Input 2:Common 3:Output JEDEC:TO –220AB (HSIP003-P-0000) ■ Block Diagram 1 Input 3 Output 2 Common Q1 Current Source Pass Tr R2 – Error Amp. + Current Limiter Voltage Reference R1 ■ Absolute Maximum Ratings (Ta=25˚C) Symbol Rating Supply voltage Parameter VCC 20 Unit V Power dissipation PD 15 W Operating ambient temperature Topr –30 to+80 ˚C Storage temperature Tstg –40 to+150 ˚C ■ Electrical Characteristics (Ta=25˚C) Parameter Symbol Output voltage Bias current Condition VO VI=13.2V, IO=200mA Ibias VI=13.2V, IO=200mA min typ 8.6 max 9.0 Unit 9.4 V 50 mA Load regulation REGL VI=13.2V, IO=0 to 200mA 25 ±50 mV Line regulation REGIN ±50 mV Output voltage temperature coefficient ∆VO/Ta VI=10 to 16V, IO=100mA VI=13.2V, IO=100mA, Topr=–30 to+80˚C Minimum input output voltage difference VDIF (min.) ±0.01 %/˚C Ripple rejection ratio Regin VI=8.5V, IO=100mA VI=13.2V, IO=100mA, f=100Hz, ein=1VP–P Maximum output current IO (max.) VI=13.2V 300 600 mA IOS VI=13.2V 50 250 mA Output short current 0.4 0.6 V 45 dB ■ Characteristics Curve PD –Ta VO –VI 20 Rth (j–c)=5.0˚C/W (max.) Rth (j–a)=65.0˚C/W (max.) 9.2 9.1 9.1 9.0 9.0 IO=0mA 100mA W C/ 12 He at 10 nk Si 8 15˚ C/W 6 He at S ink 4 Withou t heat S 2 ink 0 0 20 40 60 80 100 120 140 160 Ambient Temperature Ta (˚C) Output Voltage VO (V) Infinite Heat Sink 14 Output Voltage VO (V) 16 5˚ Power Dissipation PD (W) 18 VO –VDIF 9.2 IO=0mA 8.9 100mA 8.8 200mA 8.7 8.6 8.5 8.4 200mA 8.9 8.8 8.7 8.6 8.5 6 8 10 12 14 16 Input Voltage VI (V) 18 8.4 0 0.1 0.2 0.3 0.4 0.5 0.6 Input/Output Voltage Difference VDIF (V) VO –Ta VO – IO 9.3 10 VI=13.2V IO=100mA 9.2 9 Output Voltage VO (V) Output Voltage VO (V) 8 9.1 9.0 8.9 8.8 8.7 7 6 VI=13.2V 5 4 3 2 8.6 8.5 –40 1 –20 0 20 40 60 0 80 0 100 Ambient Temperature Ta (˚C) 200 300 400 500 600 Output Current IO (mA) ■ Block Diagram AN6541 1 2 3 VO VI + – 1µF + – 47µF Note) Choose the oscillation control capacitor 47µF which has a small capacitance reduction even at a low temperature. For example, use a tantalum capacitor.