L5991D 查看數據表（PDF） - STMicroelectronics
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产品描述 (功能)
比赛名单
L5991D Datasheet PDF : 23 Pages
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L5991 - L5991A
Figure 9. Vref vs. junction temperature.
Vref [V]
5.1
5.05
Vcc = 15V
Iref= 20mA
5
4.95
Figure 10. Vref SVRR vs. switching frequency.
SVRR (dB)
120
Vcc=15V
Vp-p=1V
80
40
4.9
-50 -25 0
25 50 75 100 125 150
Tj (°C)
Figure 11. Output saturation.
Vsat = V [V]
10
16
14
Vcc = Vc = 15V
Tj = 25°C
12
0
1
10
100
1000
fsw (Hz)
Figure 12. Output saturation.
Vsat = V [V]
10
2.5
2
Vcc = Vc = 15V
Tj = 25°C
1.5
10000
10
1
8
0.5
6
0
0.2
0.4
0.6
0.8
1
1.2
Isource [A]
Figure 13. UVLO Saturation
Ipin10 [mA]
50
40
Vcc < Vccon
before turn-on
30
20
10
0
0
6/23
200 400 600 800 1,000 1,200 1,400
Vpin10 [mV]
0
0
0.2 0.4 0.6 0.8
1
1.2
Isink [A]
Figure 14. Timing resistor vs. switching frequency.
fsw (KHz)
5000
2000
1000
500
200
100
50
20
10
Vcc = 15V, V15 =0V
Tj = 25°C
5.6nF
2.2nF
100pF
220pF
470pF
1nF
10
20
30
40
Rt (kohm)
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