参数资料
| 型号： | LTC3025IDC#TRMPBF |
| 厂商： | Linear Technology |
| 文件页数： | 9/12页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO ADJ .3A 6-DFN |
| 产品培训模块： | More Information on LDOs |
| 标准包装： | 500 |
| 稳压器拓扑结构： | 正，可调式 |
| 输出电压： | 0.4 V ~ 3.6 V |
| 输入电压： | 0.9 V ~ 5.5 V |
| 电压 - 压降（标准）： | 0.045V @ 300mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 300mA（最小） |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 6-WFDFN 裸露焊盘 |
| 供应商设备封装： | 6-DFN-EP（2x2） |
| 包装： | 带卷 (TR) |
LTC3025
APPLICATIONS INFORMATION
The LTC3025 will cycle in and out of thermal shutdown
without latch-up or damage until the overstress condition
is removed. Long term overstress (T J > 125°C) should be
avoided as it can degrade the performance or shorten the
life of the part.
Soft-Start Operation
The LTC3025 includes a soft-start feature to prevent
excessive current ?ow during start-up. When the LDO is
enabled, the soft-start circuitry gradually increases the LDO
reference voltage from 0V to 0.4V over a period of about
600μs. There is a short 700μs delay from the time the
part is enabled until the LDO output starts to rise. Figure 5
shows the start-up and shutdown output waveform.
V OUT Start-Up and Supply Sequencing
During power-up, the output shutdown circuitry is not
active below V IN of about 0.65V DC (typical). As a result,
the output voltage can drift up during power-up due to
leakage current (<1 mA typical) from V IN to V OUT . At 0.9V
input, the shutdown circuitry is active and the output is
actively held off. This usually causes no circuit problems
and is similar to 3-terminal regulators such as the LT3080,
LT1086 and LT317 which have no ground pin and can have
the output rise under some conditions. A slowly rising
V IN with the part enabled may result in non-monotonic
ramping of V OUT due to LDO circuitry becoming active at
V IN of about 0.65V (typical) as well.
With fast rising inputs (>1V/ms) or with suf?cient resis-
SHDN
V OUT
200mV/DIV
ON
OFF
1.2V
tive load on V OUT , output voltage rise during power-up is
reduced or eliminated. Such conditions also reduce or
eliminate non-monotonic initial power-up with the part
enabled. If V BIAS is sequenced up before V IN , the leakage
current from V IN to V OUT may increase until the shutdown
circuitry is active at a V IN of about 0.65V typical. Thus,
to minimize V OUT rise during start-up, sequence up V IN
before V BIAS . At V IN = 0.9V, the output is actively held off
in shutdown or it is actively held on when enabled under
0V
T A = 25°C
500μs/DIV
3025 F05
all conditions.
V IN = 1.5V
V BIAS = 3.6V
C OUT = 1μF
R LOAD = 4Ω
Figure 5. Output Start-Up and Shutdown
3025fd
9
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3025IDC-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:300mA Micropower VLDO Linear Regulator |
| LTC3026 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Adjustable 3A Single Resistor Low Dropout Regulator |
| LTC3026_1 | 制造商:LINER 制造商全称:Linear Technology 功能描述:1.5A Low Input Voltage VLDO Linear Regulator |
| LTC3026_1208 | 制造商:LINER 制造商全称:Linear Technology 功能描述:1.5A Low Input Voltage VLDO Linear Regulator |
| LTC3026EDD | 制造商:Linear Technology 功能描述:LDO Regulator Pos 0.4V to 2.6V 1.5A 10-Pin DFN EP |
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