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TLV1117LV33DCYR 数据手册 - TI（德州仪器）
制造商:
TI（德州仪器）
分类:
稳压芯片
封装:
TO-261-4
描述:
TEXAS INSTRUMENTS TLV1117LV33DCYR 固定电压稳压器, LDO, 2V至5.5V, 455mV压差, 3.3V输出, 1A输出, SOT-223-4
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引脚图在P3Hot
典型应用电路图在P1P13
原理图在P11
封装尺寸在P18P20P21
标记信息在P18P19
封装信息在P1P16P17P18P19P20P21
技术参数、封装参数在P4
应用领域在P1P24
电气规格在P5
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TLV1117LV33DCYR数据手册
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INPUT OUTPUT
GND
Device
C
IN
1 µF
C
OUT
1 µF
TLV1117LV
www.ti.com
SBVS160B –MAY 2011–REVISED FEBRUARY 2015
8 Application and Implementation
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
8.1 Application Information
The TLV1117LV is a low quiescent current linear regulator designed for high current applications. Unlike typical
high current linear regulators, the TLV1117LV series consume significantly less quiescent current. These devices
deliver excellent line and load transient performance. The device is low noise, and exhibits a very good PSRR.
As a result, it is ideal for high current applications that require very sensitive power-supply rails.
This family of regulators offers both current limit and thermal protection. The operating junction temperature
range of the device is –40°C to +125°C.
8.2 Typical Application
Figure 27 shows a typical application circuit.
Figure 27. Typical Application Circuit
8.2.1 Design Requirements
For this design example, use the parameters listed in Table 2 as the input parameters.
Table 2. Design Parameters
PARAMETER DESIGN REQUIREMENT
Input Voltage 2.5 V to 3.3 V
Output Voltage 1.8 V
Output Current 500 mA
8.2.2 Detailed Design Procedure
8.2.2.1 Input and Output Capacitor Requirements
For stability, 1.0-μF ceramic capacitors are required at the output. Higher-valued capacitors improve transient
performance. TI recommends the X5R- and X7R-type ceramic capacitors because these capacitors have
minimal variation in value and equivalent series resistance (ESR) over temperature. Unlike traditional linear
regulators that need a minimum ESR for stability, the TLV1117LV series are ensured to be stable with no ESR.
Therefore, cost-effective ceramic capacitors can be used with these devices. Effective output capacitance that
takes bias, temperature, and aging effects into consideration must be greater than 0.5 μF to ensure stability of
the device.
Copyright © 2011–2015, Texas Instruments Incorporated Submit Documentation Feedback 13
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