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TPS43350-Q1_15

更新时间： 2024-09-30 01:17:23
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德州仪器 - TI /
页数 文件大小 规格书
33页 1408K
描述
LOW IQ, DUAL SYNCHRONOUS BUCK CONTROLLER

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TPS43350-Q1_15 数据手册

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TPS43350-Q1  
TPS43351-Q1  
www.ti.com  
SLVSAR7D –JUNE 2011–REVISED APRIL 2013  
LOW IQ, DUAL SYNCHRONOUS BUCK CONTROLLER  
Check for Samples: TPS43350-Q1, TPS43351-Q1  
1
FEATURES  
2
•
Qualified for Automotive Applications  
•
•
Frequency Spread Spectrum (TPS43351-Q1)  
•
AEC-Q100 Test Guidance With the Following  
Results:  
Selectable Forced Continuous Mode or  
Automatic Low-Power Mode at Light Loads  
–
Device Temperature Grade 1: –40°C to  
125°C Ambient Operating Temperature  
•
•
Sense Resistor or Inductor DCR Sensing  
Out-of-Phase Switching Between Buck  
Channels  
–
–
Device HBM ESD Classification Level H2  
Device HBM CDM Classification Level C2  
•
•
Peak Gate Drive Current 1.5 A  
•
•
•
Two Synchronous Buck Controllers  
Thermally Enhanced, 38-Pin HTSSOP (DAP)  
PowerPAD™ Package  
Input Range up to 40 V, (Transients up to 60 V)  
Low-Power Mode IQ: 30 µA (One Buck On),  
35 µA (Two Bucks On)  
APPLICATIONS  
•
Automotive Infotainment, Navigation, and  
Instrument Cluster Systems  
•
•
•
Low Shutdown Current Ish < 4 µA  
Buck Output Range 0.9 V to 11 V  
•
Industrial or Automotive Multi-Rail DC Power  
Distribution Systems and Electronic Control  
Units  
Programmable Frequency and External  
Synchronization Range 150 kHz to 600 kHz  
•
Separate Enable Inputs (ENA, ENB)  
DESCRIPTION  
The TPS43350-Q1 and TPS43351-Q1 include two current-mode synchronous buck controllers designed for the  
harsh environment in automotive applications. The devices are ideal for use in a multi-rail system with low  
quiescent requirements, as they automatically operate in low-power mode (consuming only 30 µA) at light loads.  
The devices offer protection features such as thermal, soft-start, and overcurrent protection. During short-circuit  
conditions of the regulator output, activation of the current-foldback feature can limit the current through the  
MOSFETs for control of power dissipation. The two independent soft-start inputs allow ramp-up of the output  
voltage independently during start-up.  
The programmable range of the switching frequency is from 150 kHz to 600 kHz, as is the frequency of an  
external clock to which the devices can synchronize. Additionally, the TPS43351-Q1 offers frequency-hopping  
spread-spectrum operation.  
spacer  
VBAT  
Reverse  
Battery  
MOSFET  
Control  
VBuckA  
Internal  
VREG  
BuckA  
RCOSC  
External  
Sync  
SYNC  
ENA  
ENB  
SSA  
Buck  
Enable  
VBuckB  
SSB  
BuckB  
SoftStart  
DLYAB  
Figure 1. Typical Application Diagram  
1
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.  
2
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2011–2013, Texas Instruments Incorporated  
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