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TPS790

更新时间： 2024-11-17 11:07:55
品牌 Logo 应用领域
德州仪器 - TI 电源电路线性稳压器IC
页数 文件大小 规格书
16页 284K
描述
具有低噪声特性的 50mA、10V、低 IQ、低压降稳压器

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TPS790 数据手册

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TPS79015, TPS79018, TPS79025, TPS79028, TPS79030  
ULTRALOW-POWER LOW-NOISE 50-mA  
LOW-DROPOUT LINEAR REGULATORS  
SLVS299B – SEPTEMBER 2000 – REVISED MAY 2001  
50-mA Low-Dropout Regulator  
Available in 1.5-V, 1.8-V, 2.5-V, 2.8-V, 3.0-V  
DBV PACKAGE  
(TOP VIEW)  
1
2
3
5
OUT  
IN  
Output Noise Typically 56 µV  
(TPS79030)  
RMS  
GND  
Only 17 µA Quiescent Current at 50 mA  
1 µA Quiescent Current in Standby Mode  
4
BYPASS  
EN  
Dropout Voltage Typically 57 mV at 50 mA  
(TPS79030)  
TPS79030  
GROUND CURRENT  
vs  
JUNCTION TEMPERATURE  
Over Current Limitation  
–40°C to 125°C Operating Junction  
Temperature Range  
22  
21  
20  
19  
18  
17  
16  
15  
V = 4 V  
5-Pin SOT-23 (DBV) Package  
I
C
= 4.7 µF  
o
description  
The TPS790xx family of low-dropout (LDO)  
voltage regulators offers the benefits of  
low-dropout voltage, ultralow-power operation,  
low-output noise, and miniaturized packaging.  
These regulators feature low-dropout voltages  
and ultralow quiescent current compared to  
conventional LDO regulators. An internal resistor,  
in conjunction with an external bypass capacitor,  
creates a low-pass filter to reduce the noise. The  
I
O
= 50 mA  
I
O
= 1 mA  
TPS79030 exhibits only 56 µV  
of output  
RMS  
voltage noise using 0.01 µF bypass and 10 µF  
output capacitors. Offered in a 5-terminal small  
outline integrated-circuit SOT-23 package, the  
TPS790xx series devices are ideal for  
micropower operations, low output noise, and  
where board space is limited.  
–40 –25 –10  
5
20 35 50 65 80  
110 125  
95  
T
J
– Junction Temperature – °C  
TPS78930  
OUTPUT SPECTRAL NOISE DENSITY  
vs  
FREQUENCY  
The usual PNP pass transistor has been replaced  
by a PMOS pass element. Because the PMOS  
pass element behaves as a low-value resistor, the  
dropout voltage is very low, typically 57 mV at  
50 mA of load current (TPS79030), and is directly  
proportional to the load current. The quiescent  
current is ultralow (17 µA typically) and is stable  
over the entire range of output load current (0 mA  
to 50 mA). Intended for use in portable systems  
such as laptops and cellular phones, the  
ultralow-dropout voltage feature and ultralow-  
power operation result in a significant increase in  
system battery operating life.  
1200  
1000  
800  
V = 4 V  
I
C
C
= 4.7 µF  
o
(byp)  
= 0.1 µF  
600  
400  
I
= 50 mA  
O
I
= 1 mA  
O
200  
0
100  
1k  
10k  
100k  
f – Frequency – Hz  
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
Copyright 2001, Texas Instruments Incorporated  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of Texas Instruments  
standard warranty. Production processing does not necessarily include  
testing of all parameters.  
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265  
1234567...16

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