BD39001EKV-C Datasheet, PDF (31/56 Pages) Rohm – Buck-Boost Switching Regulator Watch Dog Timer

BD39001EKV-C
Datasheet
16. Phase compensation circuit (LDO3)
VO3 pin capacitor
The capacitor must be added between VO3 pin and GND in order to stop from having it Oscillated and the recommended
Capacitance value is more than 10uF. In accordance to graph shown in below, either Electrolytic or Ceramic Capacitor can
be used. Please ensure to select the Capacitor higher than 10uF in the range of voltage and temperature to be used at.
There is possibility of oscillation when capacitance value changes due to change of temperature. When selecting a
ceramic capacitor, X7R or higher is recommended which is good in temperature characteristic and has excellent DC bias
characteristic. In case significant voltage swing and load transient are expected, make sure to carry out thorough
evaluation before making a decision on the capacitance value.
C_VO3 VS. ESR
100
10
○Condition
ç VCC = 12 V
VS3 = 6.5 V
0 mA ≤ I_O3 ≤ 600 mA
10 µF ≤ C_VO3 ≤ 100 µF
1
0.1
0.01
10
22
33
47
68
100
CVO3[uF]
Figure 45. Output capacitor value C_VO3 vs Output capacitor ESR
V_O3
C_VO3
ESR
I_O3
Figure 46. Output capacitor and ESR measurement circuit
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TSZ02201-0T3T0AM00120-1-2
Apr.7.2014 Rev.001