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| AN6541 3-pin Positive Voltage Regulator s Overview 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. 10.50.5 10.40.5 1.40.1 o3.7 8.70.3 6.70.25 2.90.1 Unit:mm 4.5 1.40.25 s Features * Low drop-out voltage:0.3V (typ.) * Internal short-circuit current protection * Low temperature coefficient of output voltage 0.80.2 2.54 13.60.25 0.45 - 0.05 4.50.3 +0.1 2.50.25 1 2 3 1:Input 2:Common 3:Output JEDEC:TO -220AB (HSIP003-P-0000) s Block Diagram 1 Input Q1 Current Source Pass Tr 3 Output R2 - Error Amp. + Current Limiter Voltage Reference R1 2 Common s Absolute Maximum Ratings (Ta=25C) Parameter Supply voltage Power dissipation Operating ambient temperature Storage temperature Symbol VCC PD Topr Tstg Rating 20 15 -30 to+80 -40 to+150 Unit V W C C s Electrical Characteristics (Ta=25C) Parameter Output voltage Bias current Load regulation Line regulation Output voltage temperature coefficient Minimum input output voltage difference Ripple rejection ratio Maximum output current Output short current Symbol VO Ibias REGL REGIN VO/Ta VDIF (min.) Regin IO (max.) IOS Condition VI=13.2V, IO=200mA VI=13.2V, IO=200mA VI=13.2V, IO=0 to 200mA VI=10 to 16V, IO=100mA VI=13.2V, IO=100mA, Topr=-30 to+80C VI=8.5V, IO=100mA VI=13.2V, IO=100mA, f=100Hz, ein=1VP-P VI=13.2V VI=13.2V 0.01 0.4 45 300 50 600 250 0.6 min 8.6 typ 9.0 25 max 9.4 50 50 50 Unit V mA mV mV %/C V dB mA mA s Characteristics Curve PD -Ta 20 18 Rth (j-c)=5.0C/W (max.) Rth (j-a)=65.0C/W (max.) 9.2 9.1 VO -VI 9.2 9.1 VO -VDIF IO=0mA 100mA 200mA Power Dissipation PD (W) 16 Output Voltage VO (V) 14 12 10 8 6 4 2 0 0 Infinite Heat Sink 5 C/ W He at Si nk IO=0mA 8.9 Output Voltage VO (V) 9.0 9.0 8.9 8.8 8.7 8.6 8.5 8.4 100mA 8.8 8.7 8.6 8.5 8.4 200mA 15 C/W He at S ink Withou t heat S ink 20 40 60 80 100 120 140 160 6 8 10 12 14 16 18 0 0.1 0.2 0.3 0.4 0.5 0.6 Ambient Temperature Ta (C) Input Voltage VI (V) Input/Output Voltage Difference VDIF (V) VO -Ta 9.3 9.2 VI=13.2V IO=100mA 10 9 8 VO - IO Output Voltage VO (V) Output Voltage VO (V) 9.1 9.0 8.9 8.8 8.7 8.6 8.5 -40 7 6 VI=13.2V 5 4 3 2 1 -20 0 20 40 60 80 0 0 100 200 300 400 500 600 Ambient Temperature Ta (C) Output Current IO (mA) s Block Diagram AN6541 1 2 3 VI VO + - 1F + - 47F Note) Choose the oscillation control capacitor 47F which has a small capacitance reduction even at a low temperature. For example, use a tantalum capacitor. |
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