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參數(shù)資料
| 型號： | NCP5662DS28R4G |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Low Output Voltage, Ultra−Fast 2.0 A Low Dropout Linear Regulator with Enable |
| 中文描述： | 2.8 V FIXED POSITIVE LDO REGULATOR, 1.3 V DROPOUT, PSSO5 |
| 封裝： | LEAD FREE, D2PAK-5 |
| 文件頁數(shù)： | 10/14頁 |
| 文件大小： | 625K |
| 代理商： | NCP5662DS28R4G |
NCP5662, NCV5662
http://onsemi.com
10
APPLICATION INFORMATION
The NCP5662 is a high performance low dropout 2.0 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 NCP5662. 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 NCP5662. 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 NCP5662 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 2.0 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 3.0 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 NCP5662 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 NCP5662
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
and the Error Flag pin. 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.
Figure 22. DFN8 Thermal Resistance vs. Copper Area
COPPER AREA (mm
2
)
700
600
500
400
300
200
100
0
390
340
290
240
190
140
90
40
J
°
C
1 oz Copper
2 oz Copper
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| NCP5662DS30R4G | 功能描述:低壓差穩(wěn)壓器 - LDO 2A 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(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| NCP5662DS33R | 制造商:Rochester Electronics LLC 功能描述: 制造商:ON Semiconductor 功能描述: |
| NCP5662DS33R4G | 功能描述:低壓差穩(wěn)壓器 - LDO 3.3 V 2A LDO REG 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(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| NCP5662DS33R4G | 制造商:ON Semiconductor 功能描述:Linear Voltage Regulator IC |
| NCP5662DSADJR4G | 功能描述:低壓差穩(wěn)壓器 - LDO 0.9-9V ADJ 1.0A 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(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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