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TPS78001DDCTG4 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:
TSOT-23-5
描述:
150mA，低压降稳压器，超低功耗， IQ 500nA的与引脚可选，双电平输出电压 150mA, Low-Dropout Regulator, Ultralow-Power, IQ 500nA with Pin-Selectable, Dual-Level Output Voltage
Pictures:
3D模型
符号图
焊盘图
引脚图
产品图
页面导航:
引脚图在P3Hot
典型应用电路图在P18
原理图在P1P15
封装尺寸在P26P27P29P30
焊盘布局在P22
标记信息在P26P27P28
封装信息在P24P25P26P27P28P29P30
功能描述在P20
技术参数、封装参数在P4
应用领域在P1P20P36
电气规格在P5
导航目录
TPS78001DDCTG4数据手册
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TPS780
GND
EN
V
SET
IN OUT
V
IN
V
OUT
1 Fm
1 Fm
4.2Vto5.5V 2.2Vto3.3V
On
Off
V High=V
SET OUT(LOW)
V Low=V
SET OUT(HIGH)
TPS780
SBVS083E –JANUARY 2007–REVISED JANUARY 2015
www.ti.com
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 TPS780 family of LDOs is factory-programmable to have a fixed output. Note that during start-up or steady-
state conditions, do not allow the EN pin voltage to exceed V
IN
+ 0.3 V.
8.2 Typical Application
Figure 56. Typical Application Circuit
8.2.1 Design Requirements
Table 3. Design Paramters
PARAMETER DESIGN REQUIREMENT
Input Voltage 5 V
Output Voltage High 3.6 V
Output Voltage Low 2 V
Maximum Output Current 100 mA
8.2.2 Detailed Design Procedure
Select the desired device based on the output voltage.
Provide an input supply with adequate headroom to account for dropout and output current to account for the
GND pin current, and power the load. Select input and output capacitors based on application needs.
8.2.2.1 Input and Output Capacitor Requirements
Although an input capacitor is not required for stability, it is good analog design practice to connect a 0.1-μF to
1.0-μF low equivalent series resistance (ESR) capacitor across the input supply near the regulator. This
capacitor counteracts reactive input sources and improves transient response, noise rejection, and ripple
rejection. A higher-value capacitor may be necessary if large, fast rise-time load transients are anticipated, or if
the device is not located near the power source. If source impedance is not sufficiently low, a 0.1-μF input
capacitor may be necessary to ensure stability.
The TPS780 family is designed to be stable with standard ceramic capacitors with values of 1.0 μF or larger at
the output. X5R- and X7R-type capacitors are best because they have minimal variation in value and ESR over
temperature. Maximum ESR should be less than 1.0 Ω. With tolerance and dc bias effects, the minimum
capacitance to ensure stability is 1 μF.
18 Submit Documentation Feedback Copyright © 2007–2015, Texas Instruments Incorporated
Product Folder Links: TPS780
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