参数资料
| 型号： | LT3015EDD-2.5#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 17/26页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO -2.5V 1.5A 8-DFN |
| 产品培训模块： | LT3015 1.5A Low Noise Negative LDO |
| 标准包装： | 121 |
| 稳压器拓扑结构： | 负，固定式 |
| 输出电压： | -2.5V |
| 输入电压： | 可下调至 -30V |
| 电压 - 压降（标准）： | 0.31V @ 1.5A |
| 稳压器数量： | 1 |
| 电流 - 输出： | 1.5A |
| 电流 - 限制（最小）： | 1.7A |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-WFDFN 裸露焊盘 |
| 供应商设备封装： | 8-DFN（3x3） |
| 包装： | 管件 |
LT3015 Series
APPLICATIONS INFORMATION
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 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 tem-
perature, while the X5R is less expensive and is available 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 significant enough to drop
capacitor values below appropriate levels. Capacitor DC bias
characteristics tend to improve as component case size
increases, but expected capacitance at operating voltage
should be verified in situ for all applications.
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 microphone works. For
a ceramic capacitor, the stress can be induced by vibra-
tions in the system or thermal transients. The resulting
voltages produced can cause appreciable amounts of
noise. A ceramic capacitor produced the trace in Figure 6
in response to light tapping from a pencil. Similar vibration
induced behavior can masquerade as increased output
voltage noise.
V OUT
1mV/DIV
20
0
BOTH CAPACITORS ARE 16V,
1210 CASE SIZE, 10μF
–20
–40
X5R
V OUT = –1.3V
C OUT = 10μF
I L = 10μA
1ms/DIV
3015 F06
–60
Y5V
Figure 6. Noise Resulting from Tapping on a Ceramic Capacitor
20
Y5V
–80
–100
0 2 4 6 8 10 12 14 16
DC BIAS VOLTAGE (V)
3015 F04
Figure 4. Ceramic Capacitor DC Bias Characteristics
40
BOTH CAPACITORS ARE 16V,
1210 CASE SIZE, 10μF
0 X5R
–20
–40
–60
–80
–100
–50 –25 0 25 50 75 100 125
TEMPERATURE (°C)
3015 F05
Figure 5. Ceramic Capacitor Temperature Characteristics
Overload Recovery
Like many IC power regulators, the LT3015 has safe oper-
ating area protection. The safe operating area protection
activates at IN-to-OUT differential voltages greater than
8V. The safe area protection decreases current limit as
the IN-to-OUT differential voltage increases and keeps
the power transistor inside a safe operating region for
all values of forward input-to-output voltage up to the
LT3015’s Absolute Maximum Ratings.
When power is first applied and input voltage rises, the
output follows the input and keeps the IN-to-OUT differential
voltage small, allowing the regulator to supply large output
currents and start-up into high current loads. With a high
input voltage, a problem can occur wherein removal of
an output short does not allow the output voltage to fully
recover. Other LTC negative linear regulators such as the
LT1175 and LT1964 also exhibit this phenomenon, so it
is not unique to the LT3015.
3015fb
17
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3015EDD-3#PBF | 功能描述:IC REG LDO -3V 1.5A 8-DFN 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 |
| LT3015EDD-3#TRPBF | 功能描述:IC REG LDO -3V 1.5A 8-DFN 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 |
| LT3015EDD-3.3#PBF | 功能描述:IC REG LDO -3.3V 1.5A 8-DFN 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 |
| LT3015EDD-3.3#TRPBF | 功能描述:IC REG LDO -3.3V 1.5A 8-DFN 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 |
| LT3015EDD-5#PBF | 功能描述:IC REG LDO -5V 1.5A 8-DFN 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 |
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