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TPS74801DRCT Datasheet(PDF) 5 Page - Texas Instruments |
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TPS74801DRCT Datasheet(HTML) 5 Page - Texas Instruments |
5 / 28 page t (s) = SS V C I REF SS SS × 0.8V C (F) 0.44 A SS m × = Thermal Limit Soft-Start Discharge OUT V OUT FB PG IN BIAS SS EN Hysteresis andDeglitch Current Limit UVLO 0.44 A m 0.8V Reference 0.9 ´ V REF GND C SS R 1 R 2 (1) where tSS(s) = soft-start time in seconds. TPS74801 www.ti.com SBVS074J – JANUARY 2007 – REVISED JANUARY 2012 BLOCK DIAGRAM 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 270pF 0.5ms 560pF 1ms 2.7nF 5ms 5.6nF 10ms 0.01 μF 18ms Copyright © 2007–2012, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Link(s): TPS74801 |
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