参数资料
| 型号： | SC1566IM-1.8TRT |
| 厂商： | Semtech |
| 文件页数： | 7/12页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 1.8V 3A TO-263-3 |
| 标准包装： | 1 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 1.8V |
| 输入电压： | 最高 5.5V |
| 电压 - 压降（标准）： | 0.35V @ 3A |
| 稳压器数量： | 1 |
| 电流 - 输出： | 3A |
| 电流 - 限制（最小）： | 3A |
| 工作温度： | -40°C ~ 85°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： | TO-263-3 |
| 包装： | 标准包装 |
| 产品目录页面： | 1358 (CN2011-ZH PDF) |
| 其它名称： | SC1566IM-1.8DKR |
SC1566
POWER MANAGEMENT
Typical Characteristics (Cont.)
Quiescent Current vs.
Junction Temperature
Off-State Quiescent Current vs.
Junction Temperature
700
690
680
670
VIN = 3.3V
12
10
8
VIN = 5.5V
660
650
640
630
620
610
600
6
4
2
0
-50
-25
0
25
50
75
100
125
150
-50
-25
0
25
50
75
100
125
150
T J (°C)
Applications Information
Introduction
T J (°C)
to choose an appropriate output capacitor for a given
stability requirement.
The SC1566 is intended for applications such as
graphics cards where high current capability and very low
dropout voltage are required. It provides a very simple,
low cost solution that uses very little pcb real estate and
typically does not require a heatsink. Additional features
include an enable pin to allow for a very low power
consumption standby mode, and a fully adjustable
output (5-pin versions).
Component Selection
Input capacitor: a 4.7μF or 10μF ceramic capacitor is
recommended. This allows for the device being some
distance from any bulk capacitance on the rail.
Additionally, input droop due to load transients is reduced,
improving load transient response. Additional capacitance
may be added if required by the application.
Output capacitor: a minimum bulk capacitance of 2.2μF,
along with a 0.1μF ceramic decoupling capacitor is
recommended. Increasing the bulk capacitance will
Noise immunity: in very electrically noisy environments,
it is recommended that 0.1μF ceramic capacitors be
placed from IN to GND and OUT to GND as close to the
device pins as possible.
External voltage selection resistors (5-pin parts): the
use of 1% resistors, and designing for a current flow
≥ 10μμA is recommended to ensure a well regulated
output (thus R2 ≤ 120k ? ).
Thermal Considerations
The power dissipation in the SC1566 is approximately
equal to the product of the output current and the input
to output voltage differential:
P D ≈ ( VIN ? VOUT ) ? I O
The absolute worst-case dissipation is given by:
improve the overall transient response. The use of
multiple lower value ceramic capacitors in parallel to
P D ( MAX ) = ( VIN ( MAX ) ? VOUT
( MIN )
) ? I
O ( MAX )
+ VIN ( MAX ) ? I Q ( MAX )
achieve the desired bulk capacitance will not cause
stability issues. Although designed for use with ceramic
output capacitors, the SC1566 is extremely tolerant of
output capacitor ESR values and thus will also work
comfortably with tantalum output capacitors. For refer-
ence, the phase-margin contour of Figure 1. can be used
For a typical scenario, V IN = 3.3V ± 5%, V OUT = 2.8V and
I O = 2.5A, therefore:
V IN(MAX) = 3.465V, V OUT(MIN) = 2.744V and I Q(MAX) = 1.75mA,
Thus P D(MAX) = 1.81W.
? 2005 Semtech Corp.
7
www.semtech.com
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| SC1566IM-2.5TR | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Very Low Dropout 3.0 Amp Regulator With Enable |
| SC1566IM-2.5TRT | 功能描述:IC REG LDO 2.5V 3A TO-263-3 RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:3,000 系列:- 稳压器拓扑结构:正，固定式 输出电压:3V 输入电压:最高 6V 电压 - 压降（标准）:0.27V @ 150mA 稳压器数量:1 电流 - 输出:150mA（最小） 电流 - 限制（最小）:- 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:SC-74A，SOT-753 供应商设备封装:SOT-23-5 包装:带卷 (TR) 产品目录页面:665 (CN2011-ZH PDF) 其它名称:TC1185-3.0VCT713-NDTC11853.0VCT713TC11853.0VCT713RTRTC11853.0VCT713RTR-NDTC11853.0VCT713TR |
| SC1566IM-X.X.TR | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Very Low Dropout 3.0 Amp Regulator With Enable |
| SC1566IM-X.XTRT | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Very Low Dropout 3.0 Amp Regulator With Enable |
| SC1566IT | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Very Low Dropout 3.0 Amp Regulator With Enable |
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