参数资料
| 型号： | LT3020EMS8-1.8#TR |
| 厂商： | Linear Technology |
| 文件页数： | 10/16页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 1.8V .1A 8MSOP |
| 标准包装： | 2,500 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 1.8V |
| 输入电压： | 最高 10V |
| 电压 - 压降（标准）： | 0.15V @ 100mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 100mA |
| 电流 - 限制（最小）： | 110mA |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 8-MSOP |
| 包装： | 带卷 (TR) |
LT3020/LT3020-1.2/
LT3020-1.5/LT3020-1.8
APPLICATIO S I FOR ATIO
an output current change of 1mA to 100mA is typically
0.4mV at V ADJ = 200mV. At V OUT = 1.5V, load regulation is:
(1.5V/200mV) ? (0.4mV) = 3mV
Output Capacitance and Transient Response
The LT3020’s design is stable with a wide range of output
capacitors, but is optimized for low ESR ceramic capaci-
tors. The output capacitor’s ESR affects stability, most
20
0
–20
–40
–60
–80
BOTH CAPACITORS ARE 16V,
1210 CASE SIZE, 10 μ F
X5R
Y5V
notably with small value capacitors. Use a minimum
output capacitor of 2.2 μ F with an ESR of 0.3 ? or less to
prevent oscillations. The LT3020 is a low voltage device,
–100
0
2
4
6 8 10 12
DC BIAS VOLTAGE (V)
14
16
and output load transient response is a function of output
capacitance. Larger values of output capacitance decrease
the peak deviations and provide improved transient re-
sponse for larger load current changes. For output capaci-
tor values greater than 20 μ F a small feedforward capacitor
with a value of 300pF across the upper divider resistor (R2
3020 F02
Figure 2. Ceramic Capacitor DC Bias Characteristics
40
20
in Figure 1) is required.
Give extra consideration to the use of ceramic capacitors.
Manufacturers make ceramic capacitors with a variety of
dielectrics, each with a different behavior across tempera-
ture and applied voltage. The most common dielectrics are
Z5U, Y5V, X5R and X7R. The Z5U and Y5V dielectrics
provide high C-V products in a small package at low cost,
0
–20
–40
–60
–80
Y5V
BOTH CAPACITORS ARE 16V,
1210 CASE SIZE, 10 μ F
X5R
but exhibit strong voltage and temperature coefficients.
–100
–50 –25
0
25
50
75
100
125
The X5R and X7R dielectrics yield highly stable
characterisitics and are more suitable for use as the output
capacitor at fractionally increased cost. The X5R and X7R
dielectrics both exhibit excellent voltage coefficient char-
acteristics. The X7R type works over a larger temperature
range and exhibits better temperature stability whereas
X5R is less expensive and is available in higher values.
Figures 2 and 3 show voltage coefficient and temperature
coefficient comparisons between Y5V and X5R material.
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, simi-
lar to the way a piezoelectric accelerometer or microphone
TEMPERATURE ( ° C)
3020 F03
Figure 3. Ceramic Capacitor Temperature Characteristics
1mV/DIV
works. For a ceramic capacitor, the stress can be induced
by vibrations in the system or thermal transients. The re-
sulting voltages produced can cause appreciable amounts
V OUT = 1.3V
C OUT = 10 μ F
I LOAD = 0
1ms/DIV
3020 F04
of noise. A ceramic capacitor produced Figure 4’s trace in
Figure 4. Noise Resulting from Tapping on a Ceramic Capacitor
3020fc
10
相关PDF资料 |
PDF描述 |
|---|---|
| LT3020EMS8-1.5#TR | IC REG LDO 1.5V .1A 8MSOP |
| LT3020EMS8#TRPBF | IC REG LDO ADJ .1A 8-MSOP |
| LT3020EMS8#TR | IC REG LDO ADJ .1A 8MSOP |
| LT3020EDD-1.5#TRPBF | IC REG LDO 1.5V .1A 8-DFN |
| LT3020EDD-1.5#TR | IC REG LDO 1.5V .1A 8-DFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3020EMS8PBF | 制造商:Linear Technology 功能描述:LT3020 adjustable 100mA LDO regulator |
| LT3020IDD | 制造商:Linear Technology 功能描述:LDO Regulator Pos 0.2V to 9.5V 0.1A 8-Pin DFN EP |
| LT3020IDD#PBF | 功能描述:IC REG LDO ADJ .1A 8-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 产品培训模块:MIC5365/66 Ultra-small LDO Regulators 标准包装:1 系列:- 稳压器拓扑结构:正，固定式 输出电压:3V 输入电压:最高 5.5V 电压 - 压降（标准）:0.155V @ 150mA 稳压器数量:1 电流 - 输出:150mA 电流 - 限制（最小）:200mA 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:4-UDFN 裸露焊盘，4-TMLF? 供应商设备封装:4-TMLF?（1x1） 包装:Digi-Reel® 其它名称:576-3192-6 |
| LT3020IDD#TRPBF | 功能描述:IC REG LDO ADJ .1A 8-DFN RoHS:是 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 |
| LT3020IDD-1.2 | 制造商:LINER 制造商全称:Linear Technology 功能描述:100mA, Low Voltage, Very Low Dropout Linear Regulator |
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