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CS52015-1GDP3 Datasheet(PDF) 4 Page - ON Semiconductor |
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CS52015-1GDP3 Datasheet(HTML) 4 Page - ON Semiconductor |
4 / 9 page CS52015−1 http://onsemi.com 4 10 Temperature (°C) Frequency (Hz) Figure 7. Adjust Pin Current vs. Temperature Figure 8. Ripple Rejection vs. Frequency Time (mS) VIN − VOUT (V) Figure 9. Transient Response Figure 10. Short Circuit Current vs. VIN − VOUT 85 101 3.5 300 0 70 65 60 55 50 45 40 0 20 30 40 50 60 70 80 90 100 110 120 130 75 65 55 45 35 25 15 102 103 104 105 106 3.3 3.1 2.9 2.7 2.5 2.3 2.1 1.9 1.7 1.5 1.0 200 100 0 −100 −200 1500 750 0 1 2 345 6 7 89 10 IO = 10 mA TCASE = 25°C IOUT = 1.5 A (VIN − VOUT) = 3.0 V VRIPPLE = 1.0 VPP CAdj = 0.1 mF VOUT = 3.3 V COUT = CIN = 22 mF Tantalum CAdj = 0.1 mF 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 APPLICATIONS INFORMATION The CS52015−1 linear regulator provides adjustable voltages at currents up to 1.5 A. The regulator is protected against overcurrent conditions and includes thermal shutdown. The CS52015−1 has a composite PNP−NPN output transistor and requires an output capacitor for stability. A detailed procedure for selecting this capacitor is included in the Stability Considerations section. Adjustable Operation The CS52015−1 has an output voltage range of 1.25 V to 5.5 V. An external resistor divider sets the output voltage as shown in Figure 11. The regulator maintains a fixed 1.25V (typical) reference between the output pin and the adjust pin. A resistor divider network R1 and R2 causes a fixed current to flow to ground. This current creates a voltage across R2 that adds to the 1.25 V across R1 and sets the overall output voltage. The adjust pin current (typically 50 mA) also flows through R2 and adds a small error that should be taken into account if precise adjustment of VOUT is necessary. The output voltage is set according to the formula: VOUT + VREF R1 ) R2 R1 ) IAdj R2 The term IAdj × R2 represents the error added by the adjust pin current. |
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