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參數(shù)資料
| 型號： | LT1965ITPBF |
| 廠商： | Linear Technology Corporation |
| 英文描述： | 1.1A, Low Noise, Low Dropout Linear Regulator |
| 中文描述： | 1.1A的，低噪聲，低壓差線性穩(wěn)壓器 |
| 文件頁數(shù)： | 9/16頁 |
| 文件大?。?/td> | 213K |
| 代理商： | LT1965ITPBF |
LT1965
9
1965f
APPLICATIONS INFORMATION
capacitor values below appropriate levels. Capacitor DC
bias characteristics tend to improve as component case
size increases, but expected capacitance at operating
voltages should be verified.
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 micro-
phone 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. A ceramic capacitor produced the trace
in Figure 4 in response to light tapping from a pencil.
Similar vibration induced behavior can masquerade as
increased output voltage noise.
Overload Recovery
Like many IC power regulators, the LT1965 has safe oper-
ating area protection. The safe area protection decreases
current limit as input-to-output voltage increases and keeps
the power transistor inside a safe operating region for all
values of input-to-output voltage. The protective design
provides some output current at all values of input-to-
output voltage up to the device breakdown.
When power is first applied, as input voltage rises, the
output follows the input, allowing the regulator to start up
into very heavy loads. During start-up, as the input voltage
is rising, the input-to-output voltage differential is small,
allowing the regulator to supply large output currents. With
a high input voltage, a problem can occur wherein removal
of an output short will not allow the output to recover.
Figure 2. Ceramic Capacitor DC Bias Characteristics
Figure 3. Ceramic Capacitor Temperature Characteristics
Figure 4. Noise Resulting from Tapping on a Ceramic Capacitor
DC BIAS VOLTAGE (V)
C
1965 F02
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
TEMPERATURE (
°
C)
–50
40
20
0
–20
–40
–60
–80
–100
25
75
1965 F03
–25
0
50
100
125
Y5V
C
X5R
BOTH CAPACITORS ARE 16V,
1210 CASE SIZE, 10
μ
F
1ms/DIV
1mV/DIV
1965 F04
V
OUT
= 1.3V
C
OUT
= 10
μ
F
I
LOAD
= 0
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| LT1965ITTRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:1.1A, Low Noise, Low Dropout Linear Regulator |
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| LT1969CMS | 功能描述:IC OP-AMP ADJ CURRNT DUAL 10MSOP RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 放大器類型:通用 電路數(shù):2 輸出類型:滿擺幅 轉(zhuǎn)換速率:350 V/µs 增益帶寬積:180MHz -3db帶寬:320MHz 電流 - 輸入偏壓:12.5µA 電壓 - 輸入偏移:800µV 電流 - 電源:15mA 電流 - 輸出 / 通道:85mA 電壓 - 電源，單路/雙路(±):2.5 V ~ 12.6 V，±1.25 V ~ 6.3 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:8-MSOP 包裝:帶卷 (TR) |
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