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參數(shù)資料
| 型號： | GRM42-6X5R475K010 |
| 廠商： | AUK Corp |
| 英文描述： | Low Drop Output Voltage Regulator |
| 中文描述： | 低壓差穩(wěn)壓器輸出電壓 |
| 文件頁數(shù)： | 13/16頁 |
| 文件大?。?/td> | 424K |
| 代理商： | GRM42-6X5R475K010 |
50/100mA SOT-23 CMOS RF LDO Regulators
Impala Linear Corporation
6
(408) 574-3939
www.impalalinear.com
Sept. 1998
ILC7080/81 1.1
ON/OFF
GND
V
OUT
V
IN
C
NOISE
FEEDBACK
BANDGAP
REFERENCE
V
REF
ERROR
AMPLIFIER
TRANS-
CONDUCTANCE
AMPLIFIER
INTERNAL V
DD
Figure 2: ILC7080/81 RF LDO regulator block digram
Shutdown (ON/OFF) Operation
The ILC7080/81 output can be turned off by applying 0.4V
or less to the device’s ON/OFF pin (pin 3). In shutdown
mode, the ILC7080/81 draws less than 1mA quiescent cur-
rent. The output of the ILC7081 is enabled by applying 2V
to 13V at the ON/OFF pin. In applications where the
ILC7080/81 output will always remain enabled, the ON/OFF
pin may be connected to VIN (pin 1). The ILC7080/81’s
shutdown circuitry includes hysteresis, as such the device
will operate properly even if a slow moving signal is applied
to the ON/OFF pin. The device’s shutdown pin includes a
2M
internal pull down resistor connected to ground.
Short Circuit Protection
The ILC7080/81 output can withstand momentary short cir-
cuit to ground. Moreover, the regulator can deliver very high
output peak current due to its 1A instantaneous short circuit
current capability.
Thermal Protection
The ILC7080/81 also includes a thermal protection circuit
which shuts down the regulator when die temperature
exceeds 170°C due to overheating. In thermal shutdown,
once the die temperature cools to below 160°C, the regula-
tor is enabled. If the die temperature is excessive due to
high package power dissipation, the regulator’s thermal cir-
cuit will continue to pulse the regulator on and off. This is
called thermal cycling.
Excessively high die temperature may occur due to high dif-
ferential voltage across the regulator or high load current or
high ambient temperature or a combination of all three.
Thermal protection protects the regulator from such fault
conditions and is a necessary requirement in today’s
designs. In normal operation, the die temperature should be
limited to under 150°C.
Adjustable Output Voltage
Figure 3 shows how an adjustable output voltage can be
easily achieved using ILC7080/81-ADJ. The output voltage,
VOUT is given by the following equation:
VOUT = 1.24V x (R1/R2 + 1)
For best results, a resistor value of 470k
or less may be
used for R2. The output voltage can be programmed from
2.5V to 12V.
Note: An external capacitor should not be connected to the
adjustable feedback pin (pin 4). Connecting an external capacitor
to pin 4 may cause regulator instability and lead to oscillations.
ILC7080-ADJ
ILC7081-ADJ
V
OUT
V
IN
C
OUT
SOT23-5
C
IN
R1
R2
ON
OFF
12
3
4
5
V
ADJ
Figure 3: Application circuit for adjustable output voltage
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| GRM426X5R475K010AL | 制造商:Murata Manufacturing Co Ltd 功能描述: |
| GRM42-6X5R475K010AL | 制造商:Murata Manufacturing Co Ltd 功能描述: |
| GRM42-6X5R475K016AL | 制造商:Murata Manufacturing Co Ltd 功能描述: |
| GRM42-6X5R475K10 | 制造商:IMPALA 制造商全稱:IMPALA 功能描述:150MA SOT-23 ULTRA LOW NOISE CMOS RF-LDO REGULATOR |
| GRM42-6X5R475K10PT | 制造商:Murata Manufacturing Co Ltd 功能描述: |
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