参数资料
| 型号： | LT3012EFE#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 9/16页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO ADJ .25A 16-TSSOP |
| 产品培训模块： | More Information on LDOs |
| 标准包装： | 2,500 |
| 稳压器拓扑结构： | 正，可调式 |
| 输出电压： | 1.24 V ~ 60 V |
| 输入电压： | 4 V ~ 80 V |
| 电压 - 压降（标准）： | 0.4V @ 250mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 250mA |
| 电流 - 限制（最小）： | 250mA |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm）裸露焊盘 |
| 供应商设备封装： | 16-TSSOP-EP |
| 包装： | 带卷 (TR) |
LT3012
APPLICATIONS INFORMATION
V IN
IN
OUT
LT3012
ADJ
R2
+
V OUT
improved transient response for larger load current
changes. Bypass capacitors, used to decouple individual
components powered by the LT3012, will increase the
GND
R1
3012 F01
effective output capacitor value.
Extra consideration must be given to the use of ceramic
V OUT = 1.24V 1 + R2 + (I ADJ )(R2)
R1
V ADJ = 1.24V
I ADJ = 30nA AT 25°C
OUTPUT RANGE = 1.24V TO 60V
Figure 1. Adjustable Operation
The adjustable device is tested and speci?ed with the
ADJ pin tied to the OUT pin and a 5μA DC load (unless
otherwise speci?ed) for an output voltage of 1.24V. Speci-
?cations for output voltages greater than 1.24V will be
proportional to the ratio of the desired output voltage to
1.24V; (V OUT /1.24V). For example, load regulation for an
output current change of 1mA to 250mA is –7mV typical at
V OUT = 1.24V. At V OUT = 12V, load regulation is:
(12V/1.24V) ? (–7mV) = –68mV
Output Capacitance and Transient Response
The LT3012 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 3.3μF with an ESR of 3Ω or less is
recommended to prevent oscillations. The LT3012 is a
micropower device and output transient response will be
a function of output capacitance. Larger values of output
capacitance decrease the peak deviations and provide
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 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
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-
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
capacitance change over temperature. Capacitance change
due to DC bias with X5R and X7R capacitors is better than
Y5V and Z5U capacitors, but can still be signi?cant enough
to drop capacitor values below appropriate levels. Capaci-
tor DC bias characteristics tend to improve as component
case size increases, but expected capacitance at operating
voltage should be veri?ed.
20
0
BOTH CAPACITORS ARE 16V,
1210 CASE SIZE, 10μF
40
20
–20
X5R
0
X5R
–20
–40
–40
Y5V
–60
Y5V
–60
–80
–80
BOTH CAPACITORS ARE 16V,
–100
0
2
4
6
8
10
12
14
16
–100
1210 CASE SIZE, 10μF
–50 –25 0 25
50
75
100
125
DC BIAS VOLTAGE (V)
3012 F02
TEMPERATURE (°C)
3012 F03
Figure 2. Ceramic Capacitor DC Bias Characteristics
Figure 3. Ceramic Capacitor Temperature Characteristics
3012fd
9
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3012H | 制造商:LINER 制造商全称:Linear Technology 功能描述:250mA, 4V to 80V Low Dropout Micropower Linear Regulator with PWRGD |
| LT3012HFE | 制造商:Linear Technology 功能描述:LDO Regulator Pos 1.24V to 60V 0.25A 16-Pin TSSOP EP |
| LT3012HFE#PBF | 功能描述:IC REG LDO ADJ .2A 16-TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 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:2.3 V ~ 5.5 V 电压 - 压降（标准）:0.035V @ 150mA 稳压器数量:2 电流 - 输出:150mA 电流 - 限制（最小）:300mA 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:6-UFDFN 裸露焊盘，6-TMLF? 供应商设备封装:6-TMLF?（1.6x1.6） 包装:Digi-Reel® 产品目录页面:1104 (CN2011-ZH PDF) 其它名称:576-3018-6 |
| LT3012HFE#TRPBF | 功能描述:IC REG LDO ADJ .2A 16-TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 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:2.3 V ~ 5.5 V 电压 - 压降（标准）:0.035V @ 150mA 稳压器数量:2 电流 - 输出:150mA 电流 - 限制（最小）:300mA 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:6-UFDFN 裸露焊盘，6-TMLF? 供应商设备封装:6-TMLF?（1.6x1.6） 包装:Digi-Reel® 产品目录页面:1104 (CN2011-ZH PDF) 其它名称:576-3018-6 |
| LT3012HFE-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:250mA, 4V to 80V Low Dropout Micropower Linear Regulator |
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