ST1S40 datasheet(12/29 Pages) STMICROELECTRONICS

전자부품 데이터시트 검색엔진

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ST1S40 데이터시트(PDF) 12 Page - STMicroelectronics

부품명	ST1S40

상세설명	3 A DC step-down switching regulator

PDF	29 Pages

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제조업체	STMICROELECTRONICS [STMicroelectronics]

홈페이지	http://www.st.com

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12 / 29 page

Functional description

ST1S40

12/29

DocID17928 Rev 5

so by closing the loop, the loop gain GLOOP(s) is:

Equation 13

Example:

VIN = 12 V, VOUT = 1.2 V, Iomax = 3 A, L = 1.5 µH, Cout = 47 µF (MLCC), R1 = 10 k

,

R2 = 20 k

(see Section 6.2 and Section 6.3 for inductor and output capacitor selection

guidelines).

The module and phase Bode plot are reported in Figure 6.

The bandwidth is 100 kHz and the phase margin is 45 degrees.

Figure 6. Module and phase Bode plot

GLOOP s



GCO s

 G

DIV s

 G

EA s





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