参数资料
| 型号： | LT1528CT |
| 厂商： | Linear Technology |
| 文件页数： | 9/12页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 3.3V/ADJ 3A TO220-5 |
| 产品培训模块： | More Information on LDOs |
| 标准包装： | 50 |
| 稳压器拓扑结构： | 正，固定式和可调式 |
| 输出电压： | 3.3V，3.3 V ~ 14.15 V |
| 输入电压： | 3.9 V ~ 15 V |
| 电压 - 压降（标准）： | 0.57V @ 3A |
| 稳压器数量： | 1 |
| 电流 - 输出： | 3A |
| 电流 - 限制（最小）： | 3.2A |
| 工作温度： | 0°C ~ 125°C |
| 安装类型： | 通孔 |
| 封装/外壳： | TO-220-5 成形引线 |
| 供应商设备封装： | TO-220-5 |
| 包装： | 管件 |
LT1528
APPLICATIONS INFORMATION
The maximum junction temperature will be equal to the
maximum junction temperature rise above ambient plus
the maximum ambient temperature or:
T JMAX = 50°C + 31.4°C = 81.4°C
Output Capacitance and Transient Performance
The LT1528 is designed to be stable with a wide range
of output capacitors. The minimum recommended value
is 3.3μF with an ESR of 2Ω or less. The LT1528 output
transient response will be a function of output capacitance.
See the Transient Response curves in the Typical Perfor-
mance Characteristics. Larger values of output capacitance
will decrease the peak deviations and provide improved
output transient response for larger load transients. By-
pass capacitors, used to decouple individual components
powered by the LT1528, will increase the effective value
of the output capacitor.
Microprocessor Applications
The LT1528 has been optimized for microprocessor ap-
plications, with the fastest transient response of current
PNP low dropout regulators. In order to deal with the
large load transients associated with current generation
microprocessors, output capacitance must be increased.
To meet worst-case voltage speci?cations for many
popular processors, four 47μF solid tantalum surface
mount capacitors are recommended for decoupling at
the microprocessor. These capacitors should have an
ESR of approximately 0.1Ω to 0.2Ω to minimize transient
response under worst-case load deltas. The Typical Ap-
plication shows connections needed to supply power for
Table 2. Fault Conditions
several different processors. This application allows the
output voltage to be jumper selectable.
Protection Features
The LT1528 incorporates several protection features, such
as current limiting and thermal limiting, in addition to the
normal protection features associated with monolithic
regulators. The device is protected against reverse input
voltages and reverse voltages from output to input.
Current limit protection and thermal overload protection
are intended to protect the device against overload con-
ditions. For normal operation the junction temperatures
should not exceed 125°C.
The input of the device will withstand reverse voltages
of 15V. Current ?ow into the device will be limited to less
than 1mA (typically less than 100μA) and no negative
voltage will appear at the output. The device will protect
both itself and the load.
The SENSE pin is internally clamped to one diode drop
below ground. If the SENSE pin is pulled below ground,
with the input open or grounded, current must be limited
to less than 5mA.
Several different input/output conditions can occur in
regulator circuits. The output voltage may be held up
while the input is either pulled to ground, pulled to some
intermediate voltage or is left open circuit. Current ?ow
back into the output will vary depending on the conditions.
Many circuits incorporate some form of power manage-
ment. The following information summarized in Table 2
will help optimize power usage.
INPUT PIN
< V OUT (Nominal)
SHDN PIN
Open (High)
OUTPUT/SENSE PINS
Forced to V OUT (Nominal)
RESULTING CONDITIONS
Reverse Output Current ≈ 150μA (See Figure 3)
Input Current ≈ 1μA (See Figure 4)
< V OUT (Nominal)
Grounded
Forced to V OUT (Nominal)
Reverse Output Current ≈ 150μA (See Figure 3)
Input Current ≈ 1μA (See Figure 4)
Open
Open
≤ 0.8V
≤ 0.8V
> 1.5V
– 15V < V IN < 15V
Open (High)
Grounded
Open (High)
Grounded
Open (High)
Grounded
> 1V
> 1V
≤ 0V
≤ 0V
≤ 0V
≤ 0V
Reverse Output Current ≈ 150μA (See Figure 3)
Reverse Output Current ≈ 150μA (See Figure 3)
Output Current = 0
Output Current = 0
Output Current = Short-Circuit Current
Output Current = 0
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| LT1528CT#PBF | 功能描述:IC REG LDO 3.3V/ADJ 3A TO220-5 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:8V 输入电压:10.5 V ~ 23 V 电压 - 压降（标准）:1.7V @ 40mA 稳压器数量:1 电流 - 输出:100mA（最小值） 电流 - 限制（最小）:- 工作温度:0°C ~ 125°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 供应商设备封装:8-SOIC 包装:剪切带 (CT) 产品目录页面:1075 (CN2011-ZH PDF) 其它名称:296-24390-1 |
| LT1528CTPBF | 制造商:Linear Technology 功能描述:LDO Regulator 3.3V 3A Fast TO220-5 |
| LT1529 | 制造商:Linear Technology 功能描述: |
| LT1529-3.3 | 制造商:LINER 制造商全称:Linear Technology 功能描述:3A Low Dropout Regulators with Micropower Quiescent Current and Shutdown |
| LT1529-5 | 制造商:LINER 制造商全称:Linear Technology 功能描述:3A Low Dropout Regulators with Micropower Quiescent Current and Shutdown |
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