EVAL5985 STMicroelectronics, EVAL5985 Datasheet - Page 32

• Manufacturer Part Number: EVAL5985
• Description: BOARD EVAL FOR L5985
• Manufacturer: STMicroelectronics
• Type: DC/DC Switching Converters, Regulators & Controllersr

Specifications of EVAL5985

• Main Purpose: DC/DC, Step Down
• Outputs And Type: 1, Non-Isolated
• Voltage - Output: 3.3V
• Current - Output: 2A
• Voltage - Input: 3.3 ~ 18V
• Regulator Topology: Buck
• Frequency - Switching: 500kHz
• Board Type: Fully Populated
• Utilized Ic / Part: L5985
• Input Voltage: 2.9 V to 18 V
• Output Voltage: 0.6 V to 16 V
• Product: Power Management Modules
• Silicon Manufacturer: ST Micro
• Silicon Core Number: L5985
• Kit Application Type: Power Management - Voltage Regulator
• Application Sub Type: Step Down Switching Regulator
• Kit Contents: Board
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: L5985
• Other names: 497-6387; EVAL5985

Application information
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Figure 28. Load regulation
Figure 30. Load transient form 0.3 A to 1.3 A
Figure 32. Short circuit behavior
V
V
1V/div
1V/div
OUT
OUT
V
V
V
V
AC coupled
AC coupled
AC coupled
AC coupled
100mV/div
100mV/div
100mV/div
100mV/div
Load slew rate = 2.5A/us
Load slew rate = 2.5A/us
I
I
I
I
0.5A/div
0.5A/div
0.5A/div
0.5A/div
OUT
OUT
OUT
OUT
L
L
L
L
0.6
0.5
0.4
0.3
0.2
0.1
0
OUT
OUT
10V/div
10V/div
OUTPUT
OUTPUT
SHORTED
SHORTED
0
F
SW
=250KHz
I
I
500mA/div
500mA/div
L
L
0.5
V
CC
=12V
Io [A]
1
Time base 5ms/div
Time base 5ms/div
1.5
V
CC
C
C
C
C
L=6.8uH
L=6.8uH
L=6.8uH
L=6.8uH
F
F
F
F
Timescale
Timescale
Timescale
Timescale
100us/div
100us/div
100us/div
100us/div
V
SW
SW
SW
SW
=3.3V
OUT
OUT
OUT
OUT
CC
=500kHz
=500kHz
=500kHz
=500kHz
=47uF
=47uF
=47uF
=47uF
=5.0V
Doc ID 13006 Rev 5
2
Figure 29. Line regulation
Figure 31. Soft-start
-0.2
0.8
0.6
0.4
0.2
1
0
2
I
I
500mA/div
500mA/div
L
L
4
6
Time base 1ms/div
Time base 1ms/div
8
VCC [V]
10
12
14
16
V
V
500mV/div
500mV/div
V
V
200mV/div
200mV/div
OUT
OUT
FB
FB
Io=2A
Io=1A
L5985
18