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參數(shù)資料
| 型號： | TC2185 |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | 50 mA, 100 mA, 150 mA CMOS LDOs with Shutdown and Reference Bypass |
| 中文描述： | 50毫安，100毫安，一百五十零毫安的CMOS低壓降穩(wěn)壓器具有關斷和參考旁路 |
| 文件頁數(shù)： | 10/18頁 |
| 文件大小： | 362K |
| 代理商： | TC2185 |
TC2014/2015/2185
DS21662C-page 10
2003 Microchip Technology Inc.
4.0
DETAILED DESCRIPTION
The TC2014, TC2015 and TC2185 are precision fixed
output voltage regulators (If an adjustable version is
needed, see the TC1070, TC1071 or TC1187
(DS21353) datasheet.) Unlike bipolar regulators, the
TC2014, TC2015 and TC2185 supply current does not
increase with load current. In addition, the LDO output
voltage is stable using 1 μF of ceramic or tantalum
capacitance over the entire specified input voltage
range and output current range.
Figure 4-1 shows a typical application circuit. The reg-
ulator is enabled any time the shutdown input (SHDN)
is at or above V
IH
, and disabled (shutdown) when
SHDN is at or below V
IL
. SHDN may be controlled by a
CMOS logic gate or I/O port of a microcontroller. If the
SHDN input is not required, it should be connected
directly to the input supply. While in shutdown, supply
current decreases to 0.05 μA (typical) and V
OUT
falls to
zero volts.
FIGURE 4-1:
Typical Application Circuit.
4.1
Bypass Input
A 0.01 μF ceramic capacitor connected from the
Bypass input to ground reduces noise present on the
internal reference, which in turn significantly reduces
output noise. If output noise is not a concern, this input
may be left unconnected. Larger capacitor values may
be used, but the result is a longer time period to rated
output voltage when power is initially applied.
4.2
Output Capacitor
A 1 μF (min) capacitor from V
OUT
to ground is required.
The output capacitor should have an esr (effective
series resistance) of 0.01
to 5
for V
OUT
≥
2.5V, and
0.05
. to 5
for V
OUT
< 2.5V. Ceramic, tantalum or alu-
minum electrolytic capacitors can be used. When using
ceramic capacitors, X5R and X7R dielectric material
are recommended due to their stable tolerance over
temperature. However, other dielectrics can be used as
long as the minimum output capacitance is maintained.
4.3
Input Capacitor
A 1 μF capacitor should be connected from V
IN
to GND
if there is more than 10 inches of wire between the reg-
ulator and this AC filter capacitor, or if a battery is used
as the power source. Aluminum, electrolytic or tanta-
lum capacitors can be used (Since many aluminum
electrolytic capacitors freeze at approximately -30°C,
solid tantalum are recommended for applications oper-
ating below -25°C). When operating from sources other
than batteries, supply-noise rejection and transient
response can be improved by increasing the value of
the input and output capacitors and employing passive
filtering techniques.
0.01 μF
Reference
Bypass Cap
(Optional)
Shutdown Control
(from Power Control Logic)
TC2014
TC2015
TC2185
V
IN
1
2
3
4
5
V
OUT
Bypass
SHDN
GND
V
OUT
1 μF
1 μF
Battery
+
+
+
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| TC2185-1.8VCTTR | 功能描述:低壓差穩(wěn)壓器 - LDO 150mA LDO w/Shtdn 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 |
| TC2185-2.5VCTTR | 功能描述:低壓差穩(wěn)壓器 - LDO 150mA 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 |
| TC2185-2.6VCTTR | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:50 mA, 100 mA, 150 mA CMOS LDOs |
| TC2185-2.7VCTTR | 功能描述:低壓差穩(wěn)壓器 - LDO 150mA LDO w/Shtdn 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 |
| TC2185-2.85VCTTR | 功能描述:低壓差穩(wěn)壓器 - LDO 150mA LDO w/Shtdn 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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