STEVAL-ISA043V2 STMicroelectronics, STEVAL-ISA043V2 Datasheet - Page 10

• Manufacturer Part Number: STEVAL-ISA043V2
• Description: BOARD EVAL BASED ON ST1S06
• Manufacturer: STMicroelectronics

Specifications of STEVAL-ISA043V2

• Main Purpose: DC/DC, Step Down
• Outputs And Type: 1, Non-Isolated
• Voltage - Output: 3.3V
• Current - Output: 1.5A
• Voltage - Input: 2.7 ~ 6V
• Regulator Topology: Buck
• Frequency - Switching: 1.5MHz
• Board Type: Fully Populated
• Utilized Ic / Part: ST1S06
• Product: Power Management Modules
• Silicon Manufacturer: ST Micro
• Silicon Core Number: ST1S06PUR
• Kit Application Type: Power Management - Voltage Regulator
• Application Sub Type: Synchronous Buck Converter
• Kit Contents: Board
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-6420; STEVAL-ISA043V2

Board usage recommendation
4.3
10/12
Figure 6.
Figure 8.
Figure 10. Inhibit voltage vs. input voltage
Capacitors selection
It is possible to use any X5R or X7R ceramic capacitor
Efficiency vs. inductor
Efficiency vs. output current
–
–
–
ON
OFF
C1 = 4.7 µF (ceramic) or higher without limit
C2 = 22 µF (ceramic) or higher. It is possible to use several capacitors in parallel in
order to reduce the equivalent series resistor and improve the ripple present in the
output voltage.
C3 is not used in the board.
L=3.3 µH, C
I
OUT
V
V
IN
IN
=1.5 A, C
=3.3 V, V
=5 V, V
IN
=4.7 µF, C
INH
OUT
OUT
I
C
OUT
=5 V, V
IN
=22 µF, C
=1.2 V
=4.7 µF, C
=1.5 A, L=3.3 µH
OUT
OUT
=22 µF
=3.3 V,
IN
OUT
=4.7 µF
=22 µF
Figure 7.
Figure 9.
Figure 11. Switching frequency vs.
Feedback voltage vs. temperature
Input voltage vs. output voltage
temperature
V
I
C
OUT
IN
IN
=V
=4.7 µF, C
=10 mA, L=3.3 H,
R
C
INH
LOAD
IN
= 4.7 µF, C
=5 V,
=0.8 Ω , L=3.3 µH,
V
C
OUT
IN
IN
=V
=4.7 µF, C
=22 µF
INH
OUT
=5 V, L=3.3 µH
=22 µF
OUT
=22 µF
AN2371