L5983 STMicroelectronics, L5983 Datasheet - Page 33

• Manufacturer Part Number: L5983
• Description: IC REG SW STEP DOWN 1.5A 8VFQFPN
• Manufacturer: STMicroelectronics
• Type: Step-Down (Buck)r

Specifications of L5983

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 0.6 ~ 18 V
• Current - Output: 1.5A
• Frequency - Switching: 250kHz ~ 1MHz
• Voltage - Input: 2.9 ~ 18 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-VFQFN, 8-VFQFPN
• Power - Output: 1.5W
• Output Voltage: 3 V
• Output Current: 1.5 A
• Input Voltage: 2.9 V to 18 V
• Switching Frequency: 220 KHz to 275 KHz
• Operating Temperature Range: - 40 C to + 150 C
• Mounting Style: SMD/SMT
• Duty Cycle (max): 100 %
• Low Dropout Operation: 100 % duty cycle
• For Use With: 497-6386 - BOARD EVAL FOR L5983
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

L5983
Figure 28. Load regulation
Figure 30. Load transient:
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
0.35
0.25
0.15
0.05
L
L
L
L
0.4
0.3
0.2
0.1
0
OUTPUT
OUTPUT
SHORTED
SHORTED
0.2
OUT
OUT
10V/div
10V/div
from 300 mA to 1.3 A
0.4
I
I
500mA/div
500mA/div
L
L
0.6
0.8
I
O
[A]
1
Time base 5ms/div
Time base 5ms/div
1.2
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
SW
SW
SW
SW
OUT
OUT
OUT
OUT
=500kHz
=500kHz
=500kHz
=500kHz
=47uF
=47uF
=47uF
=47uF
V
V
V
Doc ID 13005 Rev 7
CC
CC
CC
=5V
=12V
=18V
1.4
Figure 29. Line regulation
Figure 31. Soft-start
0.5A/div
0.5A/div
0.5A/div
-0.05
I
I
I
0.35
0.25
0.15
0.05
L
L
L
0.4
0.3
0.2
0.1
0
2
4
6
Time base = 1 ms/div
Time base = 1 ms/div
8
VCC [V]
Application information
10
12
14
16
Io=1A
200mV/div
200mV/div
200mV/div
0.5V/div
0.5V/div
0.5V/div
18
V
V
V
33/43
OUT
OUT
OUT
V
V
V
FB
FB
FB