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TPS70345 PDF预览

TPS70345

更新时间: 2024-11-18 22:49:39
品牌 Logo 应用领域
德州仪器 - TI 稳压器输出元件
页数 文件大小 规格书
35页 574K
描述
DUAL-OUTPUT LOW-DROPOUT VOLTAGE REGULATORS WITH POWER UP SEQUENCING FOR SPLIT VOLTAGE DSP SYSTEMS

TPS70345 数据手册

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TPS70345, TPS70348, TPS70351, TPS70358, TPS70302  
DUAL-OUTPUT LOW-DROPOUT VOLTAGE REGULATORS  
WITH POWER UP SEQUENCING FOR SPLIT VOLTAGE DSP SYSTEMS  
SLVS285A – AUGUST 2000 – REVISED OCTOBER 2002  
D
D
Dual Output Voltages for Split-Supply  
Applications  
D
D
D
D
D
D
D
D
D
D
Open Drain Power Good for Regulator 1  
Ultralow 185 µA (typ) Quiescent Current  
2 µA Input Current During Standby  
Selectable Power Up Sequencing for DSP  
Applications (See TPS704xx for  
Independent Enabling of Each Output)  
Low Noise: 78 µV  
Capacitor  
Without Bypass  
RMS  
D
Output Current Range of 1 A on  
Regulator 1 and 2 A on Regulator 2  
Quick Output Capacitor Discharge Feature  
Two Manual Reset Inputs  
D
Fast Transient Response  
2% Accuracy Over Load and Temperature  
Undervoltage Lockout (UVLO) Feature  
24-Pin PowerPAD TSSOP Package  
Thermal Shutdown Protection  
D
Voltage Options Are 3.3-V/2.5-V, 3.3-V/1.8-V,  
3.3-V/1.5-V, 3.3-V/1.2-V, and Dual Adjustable  
Outputs  
D
Open Drain Power-On Reset With 120-ms  
Delay  
PWP PACKAGE  
(TOP VIEW)  
description  
1
24  
23  
22  
21  
20  
19  
18  
17  
16  
15  
14  
13  
GND/HEATSINK  
GND/HEATSINK  
TPS703xx family of devices are designed to  
2
V
V
V
V
V
IN1  
IN1  
OUT1  
provide a complete power management solution  
for TI DSP, processor power, ASIC, FPGA, and  
digital applications where dual output voltage  
regulators are required. Easy programmability of  
the sequencing function makes this family ideal  
for any TI DSP applications with power  
sequencing requirement. Differentiated features,  
such as accuracy, fast transient response, SVS  
supervisory circuit (power on reset), manual reset  
inputs, and enable function, provide a complete  
system solution.  
3
OUT1  
4
NC  
MR2  
MR1  
EN  
SEQ  
GND  
/FB1  
SENSE1  
5
NC  
6
PG1  
RESET  
NC  
7
8
9
V
V
V
/FB2  
SENSE2  
OUT2  
10  
11  
12  
V
V
IN2  
IN2  
OUT2  
GND/HEATSINK  
GND/HEATSINK  
NC – No internal connection  
TPS70351 PWP  
DSP  
3.3 V  
I/O  
V
OUT1  
5 V  
V
IN1  
22 µF  
250 kΩ  
PG1  
0.22 µF  
V
SENSE1  
PG1  
MR2  
MR2  
MR1  
>2 V  
V
IN2  
250 kΩ  
<0.7 V  
0.22 µF  
RESET  
RESET  
EN  
<0.7 V  
>2 V  
>2 V  
MR1  
EN  
<0.7 V  
V
SENSE2  
1.8 V  
SEQ  
V
OUT2  
Core  
47 µF  
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.  
PowerPAD is a trademark of Texas Instruments.  
Copyright 2002, 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  

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