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參數(shù)資料
| 型號(hào)： | TC1265-3.0VET |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | 800 mA Fixed-Output CMOS LDO with Shutdown |
| 中文描述： | 800毫安固定輸出CMOS低壓帶有關(guān)斷 |
| 文件頁(yè)數(shù)： | 7/16頁(yè) |
| 文件大小： | 262K |
| 代理商： | TC1265-3.0VET |
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2004 Microchip Technology Inc.
DS21376C-page 7
TC1265
4.0
DETAILED DESCRIPTION
The TC1265 is a precision, fixed-output LDO. Unlike
bipolar regulators, the TC1265’s supply current does
not increase with load current. In addition, V
OUT
remains stable and within regulation over the entire
0 mA to I
LOADMAX
load current range (an important
consideration in RTC and CMOS RAM battery back-up
applications).
Figure 4-1 shows a typical application circuit.
FIGURE 4-1:
Typical Application Circuit.
4.1
Output Capacitor
A 1 μF (min.) capacitor from V
OUT
to ground is
required. The output capacitor should have an Effective
Series Resistance (ESR) greater than 0.1
and less
than 5
. A 1 μF capacitor should be connected from
V
IN
to GND if there is more than 10 inches of wire
between the regulator and the AC filter capacitor, or if a
battery is used as the power source. Aluminum electro-
lytic or tantalum capacitor types can be used. Since
many aluminum electrolytic capacitors freeze at
approximately -30°C, solid tantalums are recom-
mended for applications operating 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 by employing passive filtering
techniques.
4.2
ERROR Output
ERROR is driven low whenever V
OUT
falls out of
regulation by more than – 5% (typ.). This condition may
be caused by low input voltage, output current limiting,
or thermal limiting. The ERROR threshold is 5% below
rated V
OUT
regardless of the programmed output
voltage value (e.g., ERROR = V
OL
at 4.75V (typ.) for a
5.0V regulator and 2.85V (typ.) for a 3.0V regulator).
ERROR output operation is shown in Figure 4-2.
Note that ERROR is active when V
OUT
is at or below
V
TH
and inactive when V
OUT
is above V
TH
+ V
H
.
As shown in Figure 4-1, ERROR can be used as a
battery low flag or as a processor RESET signal (with
the addition of timing capacitor C
3
). R
1
x C
3
should be
chosen to maintain ERROR below V
IH
of the processor
RESET input for at least 200 ms to allow time for the
system to stabilize. Pull-up resistor R
1
can be tied to
V
OUT
, V
IN
or any other voltage less than (V
IN
+ 0.3V).
FIGURE 4-2:
ERROR Output Operation.
C
1
R
1
1 M
V
+
TC1265
GND
V
IN
Battery
V
OUT
ERROR
SHDN
V
OUT
1 μF
+
+
Shutdown Control
(to CMOS Logic or Tie
to V
IN
, if unused)
C
2
1 μF
+
C
Required Only
if ERROR is used as a
Processor RESET Signal
(See Text)
C
3
0.2 μF
+
BATTLOW
or RESET
V
OUT
V
TH
V
IH
Hysteresis (V
H
)
V
OL
ERROR
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
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| TC1266_13 | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:200mA PCI LDO |
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| TC1266VOATR | 功能描述:低壓差穩(wěn)壓器 - LDO 200mA PCI 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(dòng)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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