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參數資料
| 型號： | LT3023 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Dual 100mA, Low Dropout, Low Noise, Micropower Regulator |
| 中文描述： | 雙100mA的電流，低壓差，低噪聲，微功耗穩(wěn)壓器 |
| 文件頁數： | 10/16頁 |
| 文件大小： | 581K |
| 代理商： | LT3023 |
10
LT3023
3023f
APPLICATIU
W
U
U
Output Capacitance and Transient Response
The LT3023 regulator is designed to be stable with a wide
range of output capacitors. The ESR of the output capaci-
tor affects stability, most notably with small
capacitors. A minimum output capacitor of 1
μ
F with an
ESR of 3
or less is recommended to prevent oscilla-
tions. The LT3023 is a micropower device and output
transient response will be a function of output capaci-
tance. Larger values of output capacitance decrease the
peak deviations and provide improved transient response
for larger load current changes. Bypass capacitors, used
to decouple individual components powered by the
LT3023, will increase the effective output capacitor value.
With larger capacitors used to bypass the reference (for
low noise operation), larger values of output capacitors
are needed. For 100pF of bypass capacitance, 2.2
μ
F of
output capacitor is recommended. With a 330pF bypass
capacitor or larger, a 3.3
μ
F output capacitor is recom-
mended. The shaded region of Figure 2 defines the region
over which the LT3023 regulator is stable. The minimum
ESR needed is defined by the amount of bypass capaci-
tance used, while the maximum ESR is 3
.
Extra consideration must be given to the use of ceramic
capacitors. Ceramic capacitors are manufactured with a
variety of dielectrics, each with different behavior across
temperature and applied voltage. The most common
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.
Figure 2. Stability
OUTPUT CAPACITANCE (
μ
F)
1
E
)
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
3
10
3023 F02
2
4
5
6 7 8 9
STABLE REGION
C
BYP
= 330pF
C
BYP
= 100pF
C
BYP
= 0
C
BYP
> 3300pF
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
3023 F04
–25
0
50
100
125
Y5V
C
X5R
BOTH CAPACITORS ARE 16V,
1210 CASE SIZE, 10
μ
F
DC BIAS VOLTAGE (V)
C
3023 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
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相關代理商/技術參數 |
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| LT3023EDD | 功能描述:IC REG LDO ADJ .1A 10-DFN RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標準包裝:800 系列:- 穩(wěn)壓器拓撲結構:正，固定式 輸出電壓:2.5V 輸入電壓:最高 16V 電壓 - 壓降（標準）:0.7V @ 4A 穩(wěn)壓器數量:1 電流 - 輸出:4A 電流 - 限制（最小）:4.2A 工作溫度:0°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:TO-263-6，D²Pak（5 引線+接片），TO-263BA 供應商設備封裝:TO-263-5 包裝:帶卷 (TR) 其它名稱:AP1184K525L-13AP1184K525LDITR |
| LT3023EDD#PBF | 功能描述:IC REG LDO ADJ .1A 10-DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 產品培訓模塊:MIC5365/66 Ultra-small LDO Regulators 標準包裝:1 系列:- 穩(wěn)壓器拓撲結構:正，固定式 輸出電壓:3V 輸入電壓:最高 5.5V 電壓 - 壓降（標準）:0.155V @ 150mA 穩(wěn)壓器數量:1 電流 - 輸出:150mA 電流 - 限制（最?。?200mA 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:4-UDFN 裸露焊盤，4-TMLF? 供應商設備封裝:4-TMLF?（1x1） 包裝:Digi-Reel® 其它名稱:576-3192-6 |
| LT3023EDD#PBF | 制造商:Linear Technology 功能描述:IC VOLT REGULATOR ADJUSTABLE +1.2 TO |
| LT3023EDD#TR | 功能描述:IC REG LDO ADJ .1A 10-DFN RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 產品培訓模塊:More Information on LDOs 標準包裝:50 系列:- 穩(wěn)壓器拓撲結構:正，固定式 輸出電壓:3.3V 輸入電壓:最高 15V 電壓 - 壓降（標準）:1.1V @ 800mA 穩(wěn)壓器數量:1 電流 - 輸出:800mA 電流 - 限制（最?。?800mA 工作溫度:0°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:TO-263-4，D²Pak（3 引線+接片），TO-263AA 供應商設備封裝:D2PAK-3 包裝:管件 |
| LT3023EDD#TRPBF | 功能描述:IC REG LDO ADJ .1A 10-DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 產品培訓模塊:More Information on LDOs 標準包裝:50 系列:- 穩(wěn)壓器拓撲結構:正，固定式 輸出電壓:3.3V 輸入電壓:最高 15V 電壓 - 壓降（標準）:1.1V @ 800mA 穩(wěn)壓器數量:1 電流 - 輸出:800mA 電流 - 限制（最小）:800mA 工作溫度:0°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:TO-263-4，D²Pak（3 引線+接片），TO-263AA 供應商設備封裝:D2PAK-3 包裝:管件 |
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