- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄384950 > TC2054 (Microchip Technology Inc.) CONNECTOR ACCESSORY PDF資料下載
參數(shù)資料
| 型號(hào)： | TC2054 |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | CONNECTOR ACCESSORY |
| 中文描述： | 連接器附件 |
| 文件頁數(shù)： | 4/16頁 |
| 文件大小： | 519K |
| 代理商： | TC2054 |
TC2054/2055/2186
DS21663B-page 4
2002 Microchip Technology Inc.
3.0
DETAILED DESCRIPTION
The TC2054, TC2055 and TC2186 are precision fixed
output voltage regulators. (If an adjustable version is
desired, please see the TC1070, TC1071 or TC1187
data sheets.) Unlike bipolar regulators, the TC2054,
TC2055 and TC2186 supply current does not increase
with load current. In addition, V
remains stable and
within regulation over the entire 0mA to maximum out-
put current operating load range.
Figure 3-1 shows a typical application circuit. The reg-
ulator is enabled any time the shutdown input (SHDN)
is at or above V
IH
, and shutdown (disabled) 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
μ
A (typical), V
OUT
falls to
zero volts, and ERROR is open-circuited.
FIGURE 3-1:
TYPICAL APPLICATION CIRCUIT
3.1
ERROR Open Drain Output
ERROR is driven low whenever V
OUT
falls out of regu-
lation by more than -5% (typical). 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 volt-
age 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
falls to V
TH
, and
inactive when V
OUT
rises above V
TH
by V
HYS
.
As shown in Figure 3-1, ERROR can be used as a bat-
tery low flag or as a processor RESET signal (with the
addition of timing capacitor C2). R1 x C2 should be
chosen to maintain ERROR below V
IH
of the processor
RESET input for at least 200msec to allow time for the
system to stabilize. Pull-up resistor R1 can be tied to
V
OUT
, V
IN
or any other voltage less than (V
IN
+ 0.3V).
The ERROR pin sink current is self-limiting to approxi-
mately 18mA.
FIGURE 3-2:
ERROR OUTPUT OPERATION
3.2
Output Capacitor
A 1
μ
F (min) capacitor from V
OUT
to ground is required.
The output capacitor should have an effective series
resistance of 0.01
. to 5
for V
OUT
= 2.5V, and 0.05
.
to 5
for V
OUT
< 2.5V. A 1
μ
F capacitor should be con-
nected from V
IN
to GND if there is more than 10 inches
of wire between the regulator and the AC filter capaci-
tor, or if a battery is used as the power source. Ceramic,
tantalum and aluminum electrolytic capacitors can be
used. (Since many aluminum electrolytic capacitors
freeze at approximately -30°C, solid tantalums are rec-
ommended for applications operating below -25°C).
When operating from sources other than batteries, sup-
ply-noise rejection and transient response can be
improved by increasing the value of the input and out-
put capacitors and employing passive filtering tech-
niques.
1μF
C1
0.2μF
C2
R1
1M
V
+
C2 Required Only
if ERROR is used as a
Processor RESET Signal
(See Text)
Shutdown Control
(to CMOS Logic or Tie
to V
IN
if unused)
BATTLOW
or RESET
TC2054
TC2055
TC2186
V
IN
BATTERY
V
OUT
ERROR
SHDN
GND
V
OUT
1μF
V
IH
V
OL
ERROR
V
TH
V
OUT
HYSTERESIS (V
HYS
)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TC2055 | CONNECTOR ACCESSORY |
| TC2186 | 50mA, 100mA, and 150mA CMOS LDOs with Shutdown and Error Output |
| TC2117 | D10 - BACKSHELL ENVIRON EMI-RFI 90 DEG M |
| TC253SPD-30 | Impactron High Sensitivity CCD (Non-Cooled) |
| TC253SPD-B0 | 680 x 500 PIXEL IMPACTRON CCD IMAGE SENSOR |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TC2054_06 | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:50 mA, 100 mA, and 150 mA CMOS LDOs with Shutdown and Error Output |
| TC2054_09 | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:50 mA, 100 mA, and 150 mA CMOS LDOs with Shutdown and Error Output |
| TC2054-1.8VCTTR | 功能描述:低壓差穩(wěn)壓器 - LDO 50mA 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 |
| TC2054-2.5VCTTR | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:50 mA, 100 mA, and 150 mA CMOS LDOs with Shutdown and Error Output |
| TC2054-2.6VCTTR | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:50 mA, 100 mA, and 150 mA CMOS LDOs with Shutdown and Error Output |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。