- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄374568 > RC1584T (FAIRCHILD SEMICONDUCTOR CORP) Analog IC PDF資料下載
參數(shù)資料
| 型號： | RC1584T |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | Analog IC |
| 中文描述： | 1.5 V-3.6 V ADJUSTABLE POSITIVE LDO REGULATOR, 1.3 V DROPOUT, PSFM3 |
| 封裝： | POWER, PLASTIC, TO-220, 3 PIN |
| 文件頁數(shù)： | 6/12頁 |
| 文件大?。?/td> | 61K |
| 代理商： | RC1584T |
RC1584
PRODUCT SPECIFICATION
6
REV. 1.0.5 7/13/00
Applications Information
General
The RC1584 and RC1584-1.5 are three-terminal regulators
optimized for GTL+ V
TT
termination applications. These
devices are short-circuit protected, and offer thermal shut-
down to turn off the regulator when the junction temperature
exceeds about 150°C. The RC1584 series provides low drop-
out voltage and fast transient response. Frequency compen-
sation uses capacitors with low ESR while still maintaining
stability. This is critical in addressing the needs of low volt-
age high speed microprocessor buses like GTL+.
Stability
The RC1584 series require an output capacitor as a part of
the frequency compensation. It is recommended to use a
22μF solid tantalum or a 100μF aluminum electrolytic on the
output to ensure stability. The frequency compensation of
these devices optimizes the frequency response with low
ESR capacitors. In general, it is suggested to use capacitors
with an ESR of <1
. It is also recommended to use bypass
capacitors such as a 22μF tantalum or a 100μF aluminum on
the adjust pin of the RC1584 for low ripple and fast transient
response. When these bypassing capacitors are not used at
the adjust pin, larger values of output capacitors provide
equally good results.
Protection Diodes
In normal operation, the RC1584 series does not require any
protection diodes. For the RC1584, internal resistors limit
internal current paths on the adjust pin. Therefore, even with
bypass capacitors on the adjust pin, no protection diode is
needed to ensure device safety under shortcircuit conditions.
A protection diode between the input and output pins is usu-
ally not needed. An internal diode between the input and out-
put pins on the RC1584 series can handle microsecond surge
currents of 50A to 100A. Even with large value output
capacitors it is difficult to obtain those values of surge cur-
rents in normal operation. Only with large values of output
capacitance, such as 1000
μ
F to 5000
μ
F, and with the input
pin instantaneously shorted to ground can damage occur. A
crowbar circuit at the input can generate those levels of cur-
rent; a diode from output to input is then recommended, as
shown in Figure 10. Usually, normal power supply cycling or
system “hot plugging and unplugging” will not generate cur-
rent large enough to do any damage.
The adjust pin can be driven on a transient basis
±
7V with
respect to the output, without any device degradation. As
with any IC regulator, exceeding the maximum input-to-
output voltage differential causes the internal transistors to
break down and none of the protection circuitry is then
functional.
Figure 10. Optional Protection
Ripple Rejection
In applications that require improved ripple rejection, a
bypass capacitor from the adjust pin of the RC1584 to
ground reduces the output ripple by the ratio of V
OUT
/1.25V.
The impedance of the adjust pin capacitor at the ripple fre-
quency should be less than the value of R1 (typically in the
range of 100
to 120
) in the feedback divider network in
Figure 10. Therefore, the value of the required adjust pin
capacitor is a function of the input ripple frequency. For
example, if R1 equals 100
and the ripple frequency equals
120Hz, the adjust pin capacitor should be 22μF. At 10kHz,
only 0.22
μ
F is needed.
Output Voltage
The RC1584 regulator develops a 1.25V reference voltage
between the output pin and the adjust pin (see Figure 11).
Placing a resistor R1 between these two terminals causes a
constant current to flow through R1 and down through R2 to
set the overall output voltage. Normally, this current is the
specified minimum load current of 10mA.
The current out of the adjust pin adds to the current from R1
and is typically 35
μ
A. Its output voltage contribution is
small and only needs consideration when very precise output
voltage setting is required.
RC1587
RC1584
ADJ
C
ADJ
R2
R1
65-1587-13
65-1584-13
+
22
μ
F
C2
+
C1
10
μ
F
+
IN
OUT
D1
(OPTIONAL)
V
IN
RC1587-1.5, -3.3
IN
GND
22
μ
F
V
OUT
C1
F
10
μ
+
+
OUT
D1
(OPTIONAL)
V
IN
V
OUT
1N4002
RC1584-1.5
C2
1N4002
相關PDF資料 |
PDF描述 |
|---|---|
| RC1584T-1.5 | THREE-TERMINAL POSITIVE FIXED VOLTAGE REGULATORS |
| RC1585 | 5A Adjustable/Fixed Low Dropout Linear Regulator |
| RC1587 | Power Conversion for the Data Communications Market |
| RC1616 | 0.5A Adjustable/Fixed Low Dropout Linear Regulator |
| RC1616D | VOLT REGULATOR|ADJUSTABLE|+1.25 TO +5.6V|BIPOLAR|SIP|3PIN|PLASTIC |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| RC1584T_32 | 功能描述:線性穩(wěn)壓器 - 標準 RoHS:否 制造商:STMicroelectronics 輸出類型: 極性: 輸出電壓:1.8 V 輸出電流:150 mA 負載調(diào)節(jié): 最大輸入電壓:5.5 V 線路調(diào)整率: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SOT-323-5L |
| RC1584T-1.5 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Positive Fixed Voltage Regulator |
| RC1584T15 | 功能描述:線性穩(wěn)壓器 - 標準 RoHS:否 制造商:STMicroelectronics 輸出類型: 極性: 輸出電壓:1.8 V 輸出電流:150 mA 負載調(diào)節(jié): 最大輸入電壓:5.5 V 線路調(diào)整率: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SOT-323-5L |
| RC1584T15_32 | 功能描述:線性穩(wěn)壓器 - 標準 RoHS:否 制造商:STMicroelectronics 輸出類型: 極性: 輸出電壓:1.8 V 輸出電流:150 mA 負載調(diào)節(jié): 最大輸入電壓:5.5 V 線路調(diào)整率: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SOT-323-5L |
| RC1585 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:5A Adjustable/Fixed Low Dropout Linear Regulator |
發(fā)布緊急采購，3分鐘左右您將得到回復。