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參數(shù)資料
| 型號： | LT1761ES5-1.8 |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | 100mA, Low Noise, LDO Micropower Regulators in SOT-23 |
| 中文描述： | 1.8 V FIXED POSITIVE LDO REGULATOR, 0.45 V DROPOUT, PDSO5 |
| 封裝： | PLASTIC, MO-193, TSOT-23, 5 PIN |
| 文件頁數(shù)： | 14/16頁 |
| 文件大?。?/td> | 246K |
| 代理商： | LT1761ES5-1.8 |
14
LT1761 Series
dielectrics used are Z5U, Y5V, X5R and X7R. The Z5U and
Y5V dielectrics are good for providing high capacitances
in a small package, but exhibit strong voltage and tem-
perature coefficients as shown in Figures 3 and 4. When
used with a 5V regulator, a 10
μ
F Y5V capacitor can exhibit
an effective value as low as 1
μ
F to 2
μ
F over the operating
temperature range. The X5R and X7R dielectrics result in
more stable characteristics and are more suitable for use
as the output capacitor. The X7R type has better stability
across temperature, while the X5R is less expensive and
is available in higher values.
Voltage and temperature coefficients are not the only
sources of problems. Some ceramic capacitors have a
piezoelectric response. A piezoelectric device generates
voltage across its terminals due to mechanical stress,
similar to the way a piezoelectric accelerometer or
Figure 4. Ceramic Capacitor Temperature Characteristics
Figure 3. Ceramic Capacitor DC Bias Characteristics
TEMPERATURE (
°
C)
–50
40
20
0
–20
–40
–60
–80
–100
25
75
1761 F04
–25
0
50
100
125
Y5V
C
X5R
BOTH CAPACITORS ARE 16V,
1210 CASE SIZE, 10
μ
F
DC BIAS VOLTAGE (V)
C
1761 F03
20
0
–20
–40
–60
–80
–1000
4
8
10
2
6
12
14
X5R
Y5V
16
BOTH CAPACITORS ARE 16V,
1210 CASE SIZE, 10
μ
F
APPLICATIOU
W
U
U
microphone works. For a ceramic capacitor the stress
can be induced by vibrations in the system or thermal
transients. The resulting voltages produced can cause
appreciable amounts of noise, especially when a ceramic
capacitor is used for noise bypassing. A ceramic capaci-
tor produced Figure 5’s trace in response to light tapping
from a pencil. Similar vibration induced behavior can
masquerade as increased output voltage noise.
100ms/DIV
1761 F05
V
500
μ
V/DIV
Figure 5. Noise Resulting from Tapping on a Ceramic Capacitor
LT1761-5
C
OUT
= 10
μ
F
C
BYP
= 0.01
μ
F
I
LOAD
= 100mA
Thermal Considerations
The power handling capability of the device will be limited
by the maximum rated junction temperature (125
°
C). The
power dissipated by the device will be made up of two
components:
1. Output current multiplied by the input/output voltage
differential: (I
OUT
)(V
IN
– V
OUT
), and
2. GND pin current multiplied by the input voltage:
(I
GND
)(V
IN
).
The ground pin current can be found by examining the
GND Pin Current curves in the Typical Performance Char-
acteristics section. Power dissipation will be equal to the
sum of the two components listed above.
The LT1761 series regulators have internal thermal limit-
ing designed to protect the device during overload condi-
tions. For continuous normal conditions, the maximum
junction temperature rating of 125
°
C must not be
exceeded. It is important to give careful consideration to
all sources of thermal resistance from junction to ambient.
Additional heat sources mounted nearby must also be
considered.
For surface mount devices, heat sinking is accomplished
by using the heat spreading capabilities of the PC board
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LT1761ES518TRMPBF | 制造商:Linear Technology 功能描述: |
| LT1761ES5-2 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:100mA, Low Noise, LDO Micropower Regulators in SOT-23 |
| LT1761ES5-2#PBF | 制造商:Linear Technology 功能描述:LDO Regulator Pos 2V 0.1A 5-Pin TSOT-23 制造商:Linear Technology 功能描述:SP-LINREG, CUT TAPE 100mA, Low Noise, LDO Micropower Regulators in SOT-23 |
| LT1761ES5-2#TR | 功能描述:IC REG LDO 2V .1A TSOT23-5 RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標準包裝:1 系列:- 穩(wěn)壓器拓撲結構:正，固定式 輸出電壓:2.7V 輸入電壓:最高 5.5V 電壓 - 壓降（標準）:0.21V @ 150mA 穩(wěn)壓器數(shù)量:1 電流 - 輸出:150mA 電流 - 限制（最?。?- 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-5 細型，TSOT-23-5 供應商設備封裝:TSOT-23-5 包裝:剪切帶 (CT) 產品目錄頁面:1100 (CN2011-ZH PDF) 其它名稱:576-1852-1 |
| LT1761ES5-2#TRM | 功能描述:IC REG LDO 2V .1A TSOT23-5 RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標準包裝:1 系列:- 穩(wěn)壓器拓撲結構:正，固定式 輸出電壓:2.7V 輸入電壓:最高 5.5V 電壓 - 壓降（標準）:0.21V @ 150mA 穩(wěn)壓器數(shù)量:1 電流 - 輸出:150mA 電流 - 限制（最小）:- 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-5 細型，TSOT-23-5 供應商設備封裝:TSOT-23-5 包裝:剪切帶 (CT) 產品目錄頁面:1100 (CN2011-ZH PDF) 其它名稱:576-1852-1 |
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