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TPS74401 Datasheet(PDF) 4 Page - Texas Instruments |
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TPS74401 Datasheet(HTML) 4 Page - Texas Instruments |
4 / 22 page www.ti.com BLOCK DIAGRAM Thermal Limit Soft-Start Discharge OUT V OUT FB PG IN BIAS SS EN Hysteresis andDe-Glitch Current Limit UVLO 0.73 A m 0.8V Reference 0.9V ´ V REF GND C SS R 1 R 2 V =0.8x( ) OUT 1+ R 1 R 2 TPS74401 SBVS066D – DECEMBER 2005 – REVISED AUGUST 2006 Table 1. Standard 1% Resistor Values for Programming the Output Voltage(1) R1 (kΩ) R2 (kΩ) VOUT (V) Short Open 0.8 0.619 4.99 0.9 1.13 4.53 1.0 1.37 4.42 1.05 1.87 4.99 1.1 2.49 4.99 1.2 4.12 4.75 1.5 3.57 2.87 1.8 3.57 1.69 2.5 3.57 1.15 3.3 (1) VOUT = 0.8 × (1 + R1/R2) Table 2. Standard Capacitor Values for Programming the Soft-Start Time(1) CSS SOFT-START TIME Open 0.1ms 470pF 0.5ms 1000pF 1ms 4700pF 5ms 0.01 µF 10ms 0.015 µF 16ms (1) tSS(s) = 0.8 × CSS(F)/7.3 × 10–7 4 Submit Documentation Feedback |
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