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參數資料
| 型號： | NCP5661MN25T2G |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | Low Output Voltage, Ultra−Fast 1.0 A Low Dropout Linear Regulator with Enable |
| 中文描述： | 2.5 V FIXED POSITIVE LDO REGULATOR, 1.3 V DROPOUT, PDSO6 |
| 封裝： | 3 X 3.30 MM, 0.95 MM PITCH, LEAD FREE, DFN-6 |
| 文件頁數： | 8/12頁 |
| 文件大?。?/td> | 131K |
| 代理商： | NCP5661MN25T2G |
NCP5661, NCV5661
http://onsemi.com
8
V
in
= 4.0 V
V
out
= 0.9 V
C
in
= 150 F
C
out
= 150 F
T
J
= 25
°
C
I
out
= 10 mA to 1.0 A
I
o
0
V
o
1
TIME (1.0 s/Div)
I
o
0
V
o
1
TIME (1.0 s/Div)
V
in
= 4.0 V
V
out
= 0.9 V
C
in
= 150 F
C
out
= 150 F
T
J
= 25
°
C
I
out
= 1.0 A to 10 mA
Figure 15. Load Transient Response
Figure 16. Load Transient Response
APPLICATION INFORMATION
The NCP5661 is a high performance low dropout 1.0 A
linear regulator suitable for high power applications,
featuring an ultrafast response time and low noise without
a bypass capacitor. It is offered in both fixed and adjustable
output versions with voltages as low as 0.9 V. Additional
features, such as Enable and Error Flag (fixed output
version) increase the utility of the NCP5661. It is thermally
robust and includes the safety features necessary during a
fault condition, which provide for an attractive high current
LDO solution for server, ASIC power supplies, networking
equipment applications, and many others.
Input Capacitor
The recommended input capacitor value is a 150 F
OSCON with an Equivalent Series Resistance (ESR) of
50 m . It is especially required if the power source is
located more than a few inches from the NCP5661. This
capacitor will reduce device sensitivity and enhance the
output transient response time. The PCB layout is very
important and in order to obtain the optimal solution, the Vin
and GND traces should be sufficiently wide to minimize
noise and unstable operation.
Output Capacitor
Proper output capacitor selection is required to maintain
stability. The NCP5661 is guaranteed to be stable at an
output capacitance of, C
out
> 10 F with an ESR < 300 m
over the output current range of 10 mA to 1.0 A. For PCB
layout considerations, place the recommended ceramic
capacitor close to the output pin and keep the leads short.
This should help ensure ultrafast transient response times.
Adjustable Output Operation
The application circuit for the adjustable output version is
shown in Figure 1. The reference voltage is 0.9 V and the
adjustable pin current is typically 40 nA. A resistor divider
network, R1 and R2, is calculated using the following
formula:
R1
R2
Vout
Vref
1
Current Limit Operation
As the peak output current increases beyond its limitation,
the device is internally clampled to 1.5 A, thus causing the
output voltage to decrease and go out of regulation. This
allows the device never to exceed the maximum power
dissipation.
Error Flag Operation
The Error Flag pin on the NCP5661 will produce a logic
Low when it drops below the nominal output voltage. Refer
to the electrical characteristics for the threshold values at
which point the Error Flag goes Low. When the NCP5661
is above the nominal output voltage, the Error Flag will
remain at logic High.
The external pullup resistor needs to be connected
between V
in
(Pin 1) and the Error Flag pin (Pin 5). A resistor
of approximately 100 k is recommended to minimize the
current consumption. No pullup resistor is required if the
Error Flag output is not being used.
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| NCP5661MNADJT2G | Low Output Voltage, Ultra−Fast 1.0 A Low Dropout Linear Regulator with Enable |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| NCP5661MN28T2G | 功能描述:低壓差穩壓器 - LDO ANA 1A LDO REGULATOR RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調節:0.3 % 輸出端數量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| NCP5661MN30T2G | 功能描述:低壓差穩壓器 - LDO ANA 1A LDO REGULATOR RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調節:0.3 % 輸出端數量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| NCP5661MN33T2G | 功能描述:低壓差穩壓器 - LDO ANA 1A LDO REGULATOR RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調節:0.3 % 輸出端數量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| NCP5661MNADJT2G | 功能描述:低壓差穩壓器 - LDO ANA 1A LDO REGULATOR RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調節:0.3 % 輸出端數量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| NCP5662 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Low Output Voltage, Ultra-Fast 2.0 A Low Dropout Linear Regulator with Enable |
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