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| 型号： | NCP1086T-ADJG |
| 厂商： | ON Semiconductor |
| 文件页数： | 5/13页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO ADJ 1.5A TO220AB |
| 产品变化通告： | Product Obsolescence 21/Jan/2010 |
| 标准包装： | 50 |
| 稳压器拓扑结构： | 正，可调式 |
| 输出电压： | 1.25 V ~ 5.5 V |
| 输入电压： | 最高 7V |
| 电压 - 压降（标准）： | 1.05V @ 1.5A |
| 稳压器数量： | 1 |
| 电流 - 输出： | 1.5A |
| 电流 - 限制（最小）： | 1.6A |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 通孔 |
| 封装/外壳： | TO-220-3 |
| 供应商设备封装： | TO-220AB |
| 包装： | 管件 |
| 其它名称： | NCP1086T-ADJGOS |
NCP1086
85
75
65
55
85
75
65
55
45
35
25
T CASE = 25 ° C
I OUT = 6A
(V IN ? V OUT = 3V)
V RIPPLE = 1.6V PP
C Adj = 0.1 m F
45
35
25
T CASE = 25 ° C
I OUT = 6A
(V IN ? V OUT = 3V)
V RIPPLE = 1.6V PP
15
10 1
10 2
10 3
10 4
10 5
10 6
15
10 1
10 2
10 3
10 4
10 5
10 6
Frequency (Hz)
Figure 11. Ripple Rejection vs. Frequency
(Adjustable Output)
0.100
0.65
Frequency (Hz)
Figure 12. Ripple Rejection vs. Frequency
(3.3 V Fixed Output)
0.075
0.60
0.55
T CASE = 0 ° C
0.050
0.025
T CASE = 125 ° C
T CASE = 25 ° C
0.50
0.45
T CASE = 25 ° C
T CASE = 125 ° C
0
0
1.0
T CASE = 0 ° C
2.0
0.40
1.0
2.0
3.0
C IN = C OUt = 22 m F Tantalum
4.0 5.0 6.0
7.0
Output Current (A)
Figure 13. Load Regulation vs. Output Current
(Adjustable Output)
V IN ? V OUT (V)
Figure 14. Minimum Load Current vs V IN ? V OUT
(Adjustable Output)
APPLICATIONS INFORMATION
The NCP1086 voltage regulator series provides
adjustable and 3.3 V output voltages at currents up to 1.5 A.
The regulator is protected against overcurrent conditions
and includes thermal shutdown.
The NCP1086 series has a composite PNP ? NPN output
transistor and requires an output capacitor for stability. A
detailed procedure for selecting this capacitor is included in
the Stability Considerations section.
A resistor divider network R1 and R2 causes a fixed
current to flow to ground. This current creates a voltage
across R2 that adds to the 1.25 V across R1 and sets the
overall output voltage. The adjust pin current (typically
50 m A) also flows through R2 and adds a small error that
should be taken into account if precise adjustment of V OUT
is necessary.
The output voltage is set according to the formula:
R1 ) R2 ) I Adj
Adjustable Operation
The adjustable output device has an output voltage range
VOUT + VREF
R1
R2
of 1.25 V to 5.5 V. An external resistor divider sets the
output voltage as shown in Figure 15. The regulator
The term I Adj × R2 represents the error added by the adjust
pin current.
maintains a fixed 1.25 V (typical) reference between the
output pin and the adjust pin.
http://onsemi.com
5
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