L5980 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'L5980' PDF : 37 Pages View PDF
Application information
L5980
Equation 25
C5
=
----------------------------C----4-----------------------------
2π ⋅ R4 ⋅ C4 ⋅ 4 ⋅ BW – 1
For example with VOUT = 1.2 V, VIN = 12 V, IO = 0.7 A, L = 22 μH, COUT = 220 μF,
ESR = 50 mΩ, the type II compensation network is:
R1 = 1.1kΩ, R2 = 249Ω, R4 = 12kΩ, C4 = 47nF, C5 = 68pF
In Figure 15 is shown the module and phase of the open loop gain. The bandwidth is about
35 kHz and the phase margin is 49°.
24/37
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