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L4957A Datasheet(PDF) 4 Page - STMicroelectronics |
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L4957A Datasheet(HTML) 4 Page - STMicroelectronics |
4 / 7 page *P ulsed te cniq ue h as been used -40 -2 0 0 204 06080 10 0 12 0 1 40 16 0 0 1 2 3 4 5 6 7 8 9 10 Tj [ °C] O u tpu t C urre nt [A] (Vin-Vou t) > 2V pin 2 = G ND Figure 3: Maximum Output Current vs. Junction Temperature Vin >2. 8 V Tj=1 25 C Tc =2 5 °C Pd m a x = 40 W Rd s o n lim it D C Operat ing A rea P o w e r D is s ip at ion L im it C urrent Lim it a t io n Tc = 7 0 °C Pd m a x = 22 W 0 12345 678 0 1 2 3 4 5 6 7 8 (V in - Vou t) [V ] O u t put C ur r e n t [ A ] Figure 4: DC Operating Area 0 10 20 30 40 50 60 70 80 90 10 0 F r eq u ency [ H z ] Ripp le Re j e c t i o n [ d B ] 1k 1 0 10 0 1 0k 1 00k V r ip pl e= 3V p- p V r ipple = 0.5 V p- p C in = 22 uF Co u t= 2 2 u F Vo u t= 1 .5 V Vin m in = 3 V Io ut= 5 A Figure 5: Ripple Rejection vs. Frequency 6.3 IOUT(A) VOUT (V) D00IN1109 Figure 6: Output Voltage vs. Output Current. (VOUT = 1.5V) 0 0 .2 0.4 0 .6 0.8 1 1.2 1 .4 1.6 1 .8 2 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 ∆ V= V in - Vo Io [A ] m a x i mu m R o n li mi ts Tj = 1 0 0 °C Tj = 1 2 5 °C Tj = 2 5 °C Figure 7: Maximum Output Current vs. Drop-Out Voltage L4957A 4/7 |
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