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TS4621EIJT датащи(PDF) 6 Page - STMicroelectronics |
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TS4621EIJT датащи(HTML) 6 Page - STMicroelectronics |
6 / 32 page Typical application schematics TS4621E 6/32 Doc ID 022201 Rev 1 Table 4. TS4621E component description Component Value Description Cs 2.2 µF Decoupling capacitors for VCC. A 2.2 µF capacitor is sufficient for proper decoupling of the TS4621E. An X5R dielectric and 10 V rating voltage is recommended to minimize ΔC/ΔV when VCC =4.8 V. Must be placed as close as possible to the TS4621E to minimize parasitic inductance and resistance. C12 2.2 µF Capacitor for internal negative power supply operation. An X5R dielectric and 6.3 V rating voltage is recommended to minimize ΔC/ΔV when HPVDD = 1.9 V. Must be placed as close as possible to the TS4621E to minimize parasitic inductance and resistance. CSS 2.2 µF Filtering capacitor for internal negative power supply. An X5R dielectric and 6.3 V rating voltage is recommended to minimize ΔC/ΔV when HPVDD = 1.9 V. Cin Input coupling capacitor that forms with Zin/2 a first-order high-pass filter with a -3 dB cutoff frequency FC. For example, at maximum gain G = 4 dB, Zin = 12.5 k Ω, Cin = 2.2 µF, therefore FC = 6 Hz. Cout 0.8 to 100 nF Output capacitor of 0.8 nF minimum to 100 nF maximum. This capacitor is mandatory for operation of the TS4621E. Rout 12 Ω min. Output resistor in-series with the TS4621E output. This 12 Ω minimum resistor is mandatory for operation of the TS4621E. L1 3.3 µH Inductor for the buck convertor. References of inductors: FDK: MIPSZ2012D3R3 (DC resistance = 0.19 Ω, rated current = 0.8 A) Murata: LQM2MPN3R3G0 (DC resistance = 0.12 Ω, rated current = 1.2 A) Ct 10 µF Tank capacitor for internal buck convertor. An X5R dielectric and 6.3 V rating voltage is recommended to minimize ΔC/ΔV when HPVDD = 1.9 V. ESR of the Ct capacitor must be as low as possible to obtain the best buck efficiency. Cin 1 2 πZinFc ------------------------ = |
Аналогичный номер детали - TS4621EIJT |
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Аналогичное описание - TS4621EIJT |
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