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參數(shù)資料
| 型號(hào)： | MB3788 |
| 廠商： | FUJITSU LTD |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| 中文描述： | 0.03 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO24 |
| 封裝： | PLASTIC, SSOP-24 |
| 文件頁(yè)數(shù)： | 17/21頁(yè) |
| 文件大?。?/td> | 750K |
| 代理商： | MB3788 |
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17
MB3788
(Reference Data)
The phase margin is halved by changing the smoothing capacitor from an aluminum electrolytic capacitor (Rc = 1.0
) to a semiconductor
electrolytic capacitor (OS capacitor: Rc = 0.2
) with a low ESR (Figures 11 and 12).
Fig. 10 DC/DC Converter A
V
-
φ
Characteristic Meas
urement Diagram
Fig. 11 Gain - Frequency Characteristic
Fig.12 Phase - Frequency Characteristic Curves
+
-
A
V
-
φ
characteristic between V
OUT
and V
IN
Error amplifier
V
OUT
C
NF
FB
V
IN
R
2
R
1
V
O
+
-
IN
+IN
V
REF/2
62
°
A
V
101001 k10 k100 k
60
40
20
0
-20
-40
180
90
0
-90
-180
V
CC
= 10 V
RL = 25
CP = 0.1
μ
F
Gain
(dB)
Frequency f (Hz)
Aluminum electrolytic capacitor gain - frequency and phase - frequency characteristics (DC/DC converter +5 V output)
Aluminum electrolytic capacitor
220
μ
F (16 V)
Rc
≈
1.0
: f
OSC
= 1 kHz
V
O
+
+
-
Phase
(deg)
GND
A
V
101001 k10 k100 k
60
40
20
0
-20
-40
180
90
0
-90
-180
27
°
V
CC
= 10 V
RL = 25
CP = 0.1
μ
F
Gain
(dB)
Frequency f (Hz)
OS capacitor gain - frequency and phase - frequency characteristics (DC/DC converter +5 V output)
OS capacitor
22
μ
F (16 V)
Rc
≈
1.2
: f
OSC
= 1 kHz
V
O
+
+
-
GND
Phase
(deg)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
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