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參數(shù)資料
| 型號： | ILC7080 |
| 廠商： | Impala Linear Corporation |
| 英文描述： | 50/100M SOT-23 CMOS RF LDO REGULATORS |
| 中文描述： | 50/100M的SOT - 23 CMOS射頻LDO穩(wěn)壓器 |
| 文件頁數(shù)： | 5/16頁 |
| 文件大?。?/td> | 574K |
| 代理商： | ILC7080 |
ILC7080/81
REV. 1.0.7 4/3/03
5
Figure 2. ILC7080/81 RF LDO regulator block diagram
ON/OFF
GND
V
OUT
V
IN
C
NOISE
FEEDBACK
BANDGAP
REFERENCE
V
REF
ERROR
AMPLIFIER
TRANS-
CONDUCTANCE
AMPLIFIER
INTERNAL V
DD
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 1μA 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 V
IN
(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.
Short Circuit Protection
The ILC7080/81 output can withstand momentary short
circuit 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 150C due to overheating. In thermal shutdown,
once the die temperature cools to below 140C, the regulator
is enabled. If the die temperature is excessive due to high
package power dissipation, the regulator’s thermal circuit
will continue to pulse the regulator on and off. This is called
thermal cycling.
Excessively high die temperature may occur due to high
differential 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 150C.
Adjustable Output Voltage
Figure 3 shows how an adjustable output voltage can be
easily achieved using ILC7081-ADJ. The output voltage,
V
OUT
is given by the following equation:
V
OUT
= 1.24V x (R1/R2 + 1)
Figure 3. Application circuit for adjustable output voltage
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.
ILC7081-ADJ
V
OUT
V
IN
C
OUT
R
1
SOT23-5
C
IN
ON
OFF
1
2
3
4
5
V
ADJ
R
2
相關PDF資料 |
PDF描述 |
|---|---|
| ILC7081AIM5ADJX | 50/100M SOT-23 CMOS RF LDO REGULATORS |
| ILC7081AIM5-30 | 50/100M SOT-23 CMOS RF LDO REGULATORS |
| ILC7084AIM5ADJX | 150mA SOT-23 Low Noise CMOS RF-LDO⑩ Regulator |
| ILC7083 | 150mA SOT-23 Low Noise CMOS RF-LDO⑩ Regulator |
| ILC7083AIM525X | 150mA SOT-23 Low Noise CMOS RF-LDO⑩ Regulator |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ILC7080AIM28X | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| ILC7080AIM5 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:50/100mA SOT-23 CMOS RF LDO Regulators |
| ILC7080AIM526X | 功能描述:低壓差穩(wěn)壓器 - LDO 0.08A LDO 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(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| ILC7080AIM526X_Q | 功能描述:低壓差穩(wěn)壓器 - LDO 0.08A LDO 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(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| ILC7080AIM527X | 功能描述:低壓差穩(wěn)壓器 - LDO 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(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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