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參數(shù)資料
| 型號(hào)： | AND8028D |
| 廠商： | ON SEMICONDUCTOR |
| 英文描述： | Precision Sub-One Volt 1.7 Ampere Output LDO |
| 中文描述： | 精密低于1伏一點(diǎn)七安培輸出LDO |
| 文件頁數(shù)： | 2/4頁 |
| 文件大?。?/td> | 37K |
| 代理商： | AND8028D |
AND8028/D
http://onsemi.com
2
V
out
V
in
R1
1.5 k
R2
4.3 k
R4
10
R3
18
R6
1 k
C2
100
C1
100
C3
1
Q2 MBT3904
D1
MRA4003T3
R5
300
NCP100
U1
Q1 MBT35200MT1
C4
1 n
Figure 1. Circuit Schematic for 0.9 Volt 1.7 Ampere LDO
RESULTS
Utilizing the circuit in Figure 1, layout in Figure 3 and
values in Table 1, the output voltage varies 40 millivolts
between 1.5 volts to 3.0 volts and 0 amperes to 1.7 amperes
for an output voltage centered at 0.945 volts, which equates
to a +/– 2.5 % variation for load and line. The voltage droop
due to load transient is small as seen in Figure 2. If R1 is
varied to change the output voltage to 1.8 volts, the
minimum drop out voltage is 34 millivolts under light load
conditions and 230 millivolts for 1.7 amperes. The
minimum input voltage to operate of the circuit in Figure 1
is 1.42 volts for 1.7 amperes and 1.37 volts for 0.5 amperes.
As discussed previously, the operating range of this circuit
can vary depending upon R3.
V
out
: 200 mV/div
I
out
: 0.5 A/div
Time Scale: 100 us/div
Figure 2. Load Transient for 1.8 Volts In and Load
from 0.5 Amperes to 1.5 Amperes
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AND8031 | Isolated Precision Regulation of a Single 1.8 Volt Output from a Universal Line Input |
| AND8031D | Isolated Precision Regulation of a Single 1.8 Volt Output from a Universal Line Input |
| AND8039 | The One-Transistor Forward Converter |
| AND8044 | Single-Channel 1206A ChipFET TM Power MOSFET Recommended Pad Pattern and Thermal Performance |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AND8031 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Isolated Precision Regulation of a Single 1.8 Volt Output from a Universal Line Input |
| AND8031D | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Isolated Precision Regulation of a Single 1.8 Volt Output from a Universal Line Input |
| AND8039 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:The One-Transistor Forward Converter |
| AND8044 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Single-Channel 1206A ChipFET TM Power MOSFET Recommended Pad Pattern and Thermal Performance |
| AND8044/D | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Single-Channel 1206A ChipFET TM Power MOSFET Recommended Pad Pattern and Thermal Performance |
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