AN6540 4-pin Voltage Regulator with Adjustable Rise Time ■ Overview Unit:mm + 0.5 4.0 9.6 – 0.1 ø 3.1 2.0 12.5max. 3–1.0 1.8 9.0min. The AN6540 is an integrated circuit designed for a 4pin voltage regulator with adjustable rise time. An external capacitor allows any setting of output voltage rise time and noise reduction at power on, and are best suited for power circuits with current capacitance up to 240mA. It can be used up to the minimum input/output voltage difference 0.3V(typ.). ■ Features 0.7±0.2 • Low dropout voltage:0.3V(typ.) • Control of output voltage rise time • Internal short-circuit protection • Low temperature coefficient of output voltage 0.5±0.1 1.5 1.3 3.3max. 2.3 2.3 2.3 4-pin SIL Plastic Package with Fin (SSIP004-P-0000) ■ Block Diagram 1 Input 4 Output 2 Common Q1 Current Source Pass Tr R2 Error Amp. Rise Time Control CR 3 Current Limiter Voltage Reference R1 ■ Absolute Maximum Ratings (Ta=25˚C) Parameter Symbol Rating Unit VCC 20 V Vsurge * 40 V Power dissipation (Tc=25˚C) PD 6 W Operating ambient temperature Topr –30 to +80 ˚C Storage temperature Tstg –40 to +150 ˚C Supply voltage Supply surge voltage * t=200ms ■ Electrical Characteristics (Ta=25˚C) Parameter Condition Symbol Output voltage VO VI=13.2V, IO=200mA Bias current Ibias VI=13.2V, IO=200mA min 8.1 typ max Unit 8.5 8.9 V 25 50 mA Load regulation REGL VI=13.2V, IO=0 to 200mA ±50 mV Line regulation REGIN ±50 mV Output voltage temperature coefficient ∆VO/Ta Minimum input/output voltage difference VDIF (min.) Ripple rejection ratio Regin VI=9.5 to 16V, IO=100mA VI=13.2V, IO=100mA, Topr=–30 to+80˚C input/output voltage difference with input voltage 8.0V, IO=100mA VI=13.2V, IO=100mA, f=100Hz, ein=1VP–P Maximum output current IO (max.) VI=13.2V 240 600 mA IOS VI=13.2V 50 160 mA Cr=10µF±10% 0.5 2 s Output short current Rise time tr Note) After the load short, return with I0=230mA or over. ±0.01 0.3 %/˚C 0.6 50 V dB 1 ■ Characteristics Curve tr – Cr PD –Ta 50 Power Dissipation PD (W) /W nk ˚C He at 3 1 2 3 5 10 20 30 50 0 100 Si nk 2 ut Hea 1 0.1 nk Si 15 4 Witho 0.3 0.2 Si at Rise Time tr (s) at 5 He 0.5 He 1 IO=0mA 6 /W 3 2 8.7 te 5 7 C 5˚ 10 8.8 i fin In 30 20 VO –VI 8 Output Voltage VO (V) 100 0 Capacity Cr (µF) 20 t Sink 40 60 8.5 100mA 200mA 8.4 8.3 8.2 8.1 8.0 80 100 120 140 160 6 Ambient Temperature Ta (˚C) VO –VDIF 10 8 16 14 18 VO – IO 8.8 IO=0mA 12 Input Voltage VI (V) VO –Ta 8.7 8.6 8.6 10 VI=13.2V IO=100mA 8.7 VI=13.2V 9 100mA 200mA 8.4 8.3 8.2 8.1 8.6 Output Voltage VO (V) Output Voltage VO (V) Output Voltage VO (V) 8 8.5 8.5 8.4 8.3 8.2 7 6 5 4 3 2 8.0 7.9 8.1 0 0.1 0.3 0.2 0.4 0.5 8.0 –40 0.6 Input/Output Voltage Difference VDIF (V) 1 20 0 –20 40 60 0 80 Ambient Temperature Ta (˚C) 0 100 200 ■ Basic Regulator Circuit 1 VI VO 4 AN6540 + + 1µF 2 3 – Cr 300 Output Current IO (mA) + – 47µF – Note) Choose the oscillation control capacitor 47µF which has a small capacitance reduction even at a low temperature. For example, use the tantalum capacitor. 400