L5988D View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
L5988D
STMicroelectronics
'L5988D' PDF : 52 Pages View PDF
Typical characteristics
L5988D
Figure 36. Efficiency vs. output current
95.00
VIN = 12v fSW = 250 kHz
90.00
85.00
80.00
75.00
70.00
65.00
VIN=12 VOUT=1.2 250 kHz
VIN=12 VOUT=1.5 250 kHz
VIN=12 VOUT=1.8 250 kHz
VIN=12 VOUT=2.5 250 kHz
VIN=12 VOUT=3.3 250 kHz
VIN=12 VOUT=5.0 250 kHz
60.00
0.2
0.6
1.0
1.4
1.8
2.2
2.6
3.0
3.4
3.8
ILOAD (A)
Figure 38. Line regulation
Figure 37. Load regulation
L5988D LOAD REGULATION (VIN 12V - L = 4.7μH)
3.36
3.355
3.35
3.345
3.34
3.335
η(%) 3.33
3.325
3.32
3.315
3.31
3.305
L5988D_3.3v_400k_AFP]
3.3
0
0.5
1
1.5
2
2.5
3
3.5
4
ILOAD (A)
Figure 39. Load transient from 0 to 3 A
3.36
3.355
3.35
3.345
3.34
3.335
η(%) 3.33
3.325
3.32
3.315
3.31
3.305
3.3
3.5
L5988D LINE REGULATION (L = 4.7μH)
L5988D_3.3v_400k
5.5
7.5
9.5
11.5 13.5 15.5 17.5
ILOAD (A)
100mV/div
fsw=600 kHz
Cout=47uF
SR = 2.5A/us
Figure 40. Soft-start
fsw=400 kHz
48/52
DocID15324 Rev 4
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