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| 型号： | LT1964ES5-BYP#TRMPBF |
| 厂商： | Linear Technology |
| 文件页数： | 12/16页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO NEG ADJ .2A TSOT23-5 |
| 产品培训模块： | More Information on LDOs |
| 标准包装： | 1 |
| 稳压器拓扑结构： | 负，可调式 |
| 输出电压： | -1.22 V ~ -20 V |
| 输入电压： | -1.9 V ~ -20 V |
| 电压 - 压降（标准）： | 0.34V @ 200mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 200mA |
| 电流 - 限制（最小）： | 220mA |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-5 细型，TSOT-23-5 |
| 供应商设备封装： | TSOT-23-5 |
| 包装： | 标准包装 |
| 产品目录页面： | 1330 (CN2011-ZH PDF) |
| 其它名称： | LT1964ES5-BYP#TRMPBFDKR |
LT1964
APPLICATIONS INFORMATION
Output Capacitance and Transient Response
The LT1964 is designed to be stable with a wide range
of output capacitors. The ESR of the output capacitor
affects stability, most notably with small capacitors. A
minimum output capacitor of 1μF with an ESR of 3Ω or
less is recommended to prevent oscillations. The LT1964
is a micropower device and output transient response
will be a function of output capacitance. Larger values
Voltage and temperature coef?cients 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
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 LT1964, will increase the
effective output capacitor value.
20
0
–20
BOTH CAPACITORS ARE 16V,
1210 CASE SIZE, 10μF
X5R
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
–40
–60
–80
Y5V
dielectrics used are speci?ed with EIA temperature char-
acteristic codes of Z5U, Y5V, X5R and X7R. The Z5U and
Y5V dielectrics are good for providing high capacitances
–100
0
2
4
6 8 10 12
DC BIAS VOLTAGE (V)
14 16
1964 F02
in a small package, but they tend to have strong voltage
and temperature coef?cients as shown in Figures 2 and 3.
When used with a 5V regulator, a 16V 10μF Y5V capacitor
can exhibit an effective value as low as 1μF to 2μF for the
DC bias voltage applied and over the operating tempera-
Figure 2. Ceramic Capacitor DC Bias Characteristics
40
20
ture 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 avail-
able in higher values. Care still must be exercised when
using X5R and X7R capacitors; the X5R and X7R codes
only specify operating temperature range and maximum
0
–20
–40
–60
–80
Y5V
BOTH CAPACITORS ARE 16V,
1210 CASE SIZE, 10μF
X5R
capacitance change over temperature. Capacitance change
due to DC bias with X5R and X7R capacitors is better than
–100
–50 –25
0 25 50 75
TEMPERATURE (°C)
100
125
Y5V and Z5U capacitors, but can still be signi?cant enough
to drop capacitor values below appropriate levels. Capaci-
1964 F03
Figure 3. Ceramic Capacitor Temperature Characteristics
tor DC bias characteristics tend to improve as component
case size increases, but expected capacitance at operating
voltage should be veri?ed.
1964fb
12
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1964ES5-BYPTRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:200mA, Low Noise,Low Dropout Negative Micropower Regulator |
| LT1964ES5-SD | 制造商:Linear Technology 功能描述:LDO Regulator Neg -1.22V to -20V 0.2A 5-Pin TSOT-23 |
| LT1964ES5-SD#PBF | 制造商:Linear Technology 功能描述:LDO FIXED -5V 200mA SOT-23 制造商:Linear Technology 功能描述:LDO, FIXED, -5V, 200mA, SOT-23-5; Primary Input Voltage:-2.2V; Output Voltage Fixed:-5V; Dropout Voltage Vdo:340mV; No. of Pins:5; Output Current:200mA; Operating Temperature Min:-40C; Operating Temperature Max:125C ;RoHS Compliant: Yes |
| LT1964ES5-SD#TR | 功能描述:IC REG LDO NEG ADJ .2A TSOT23-5 RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 产品培训模块:More Information on LDOs 标准包装:50 系列:- 稳压器拓扑结构:正，固定式 输出电压:3.3V 输入电压:最高 15V 电压 - 压降（标准）:1.1V @ 800mA 稳压器数量:1 电流 - 输出:800mA 电流 - 限制（最小）:800mA 工作温度:0°C ~ 125°C 安装类型:表面贴装 封装/外壳:TO-263-4，D²Pak（3 引线+接片），TO-263AA 供应商设备封装:D2PAK-3 包装:管件 |
| LT1964ES5-SD#TRM | 功能描述:IC REG LDO NEG ADJ .2A TSOT23-5 RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 产品培训模块:More Information on LDOs 标准包装:50 系列:- 稳压器拓扑结构:正，固定式 输出电压:3.3V 输入电压:最高 15V 电压 - 压降（标准）:1.1V @ 800mA 稳压器数量:1 电流 - 输出:800mA 电流 - 限制（最小）:800mA 工作温度:0°C ~ 125°C 安装类型:表面贴装 封装/外壳:TO-263-4，D²Pak（3 引线+接片），TO-263AA 供应商设备封装:D2PAK-3 包装:管件 |
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