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參數(shù)資料
| 型號(hào)： | UPC3025 |
| 英文描述： | Useage of Three-Terminal Regulators | User＇s Manual[05/2000] |
| 中文描述： | 使用三端穩(wěn)壓器|用戶手冊(cè)[05/2000] |
| 文件頁數(shù)： | 20/35頁 |
| 文件大?。?/td> | 187K |
| 代理商： | UPC3025 |
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User’s Manual G12702EJ8V0UM00
27
Figure 6-3. Load Regulation Conceptualization (For
PC7805AHF, IO = 500 mA)
TA = 25
°C
VIN = 10 V
REG
LTYP.
REG
LMAX.
+10
0
10
20
30
0
0.5
1.0
1.5
Output current IO (A)
Load
stability
REG
L(mV)
<4> Quiescent current IBIAS
This is the bias current needed for each internal block of a power supply IC to operate. It flows from input
toward GND.
Applications that adjust output voltage by inserting a resistor in GND take this item into
account.
<5> Quiescent current change
IBIAS
This shows the change in IBIAS when the input voltage or load current changes.
<6> Ripple rejection rate R
R
The ripple voltage that appears in the output when a 120 Hz sine wave (minimum value and maximum value
of sine wave are noted in measured conditions) is input in the input is represented by the following
expression.
R
R = 20 log (VIN/VOripple) [dB]
If the frequency increases, R
R decreases mainly due to the frequency characteristics of the internal error
amplifier of the IC.
<7> Output noise voltage Vn
This shows the noise that occurs inside a power supply IC (mainly thought to be thermal noise).
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