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TPS54362A

更新时间： 2024-11-10 08:38:59
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德州仪器 - TI 转换器
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35页 919K
描述
3A, 60V STEP DOWN DC/DC CONVERTER WITH LOW Iq

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TPS54362A 数据手册

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TPS54362-Q1, TPS54362A-Q1  
www.ti.com  
SLVS845D –MARCH 2009–REVISED OCTOBER 2011  
3A, 60V STEP DOWN DC/DC CONVERTER WITH LOW Iq  
Check for Samples: TPS54362-Q1, TPS54362A-Q1  
1
FEATURES  
•
Reset Function Filter Time for Fast Negative  
Transients  
2
•
Withstands Transients up to 60V With an  
Operating Range of 3.6V to 48V  
•
•
Programmable Overvoltage Output Monitoring  
Programmable Undervoltage Output  
Monitoring, Issuance of Reset if Output Falls  
Below Threshold  
•
Asynchronous Switch Mode Regulator With  
External Components (L and C), Load Current  
up to 3A (max)  
•
Thermal Shutdown During Excessive Power  
Dissipation  
•
•
•
0.8V ± 1.5% Voltage Reference  
200kHz to 2.2MHz Switching Frequency  
•
•
Switch Current Limit Protection  
High Voltage Tolerant Enable Input for ON/OFF  
State  
Short Circuit and Overcurrent Protection of  
FET  
•
•
•
•
Soft Start on Enable Cycle  
•
•
•
Junction Temperature Range: –40°C to 150°C  
Package: 20-pin HTSSOP PowerPAD™  
Qualified for Automotive Applications  
Slew Rate Control on Internal Power Switch  
External Clock Input for Synchronization  
Pulse Skip Mode (PFM) During Light Output  
Loads With Quiescent Current = 65μA Typical  
(LPM Operation)  
APPLICATIONS  
•
•
•
•
Automotive Telematics  
Navigation systems  
•
External Compensation for Wide Bandwidth  
Error Amplifier  
•
•
Internal Undervoltage Lock Out UVLO  
Programmable Reset Power on Delay  
In-Dash Instrumentation  
Battery Powered Applications  
DESCRIPTION  
The TPS54362/TPS54362A is a step down switch mode power supply with voltage supervisor. Integrated input  
voltage line feed forward topology improves line transient regulation of the voltage mode buck regulator. The  
regulator has a cycle-by cycle current limit. A pulse skip mode operation under no load reduces the supply  
current to 65μA. Using the enable pin, the supply shutdown current is reduced to 1μA.  
VIN  
LPM  
VIN  
EN  
95%  
90%  
85%  
80%  
75%  
70%  
90%  
85%  
80%  
Supply  
Rslew  
Rslew = 5kW  
SS  
V
= 6 V  
IN  
SYNC  
nRST  
RT  
TPS54362  
VReg  
Rslew = 35kW  
BOOT  
V
= 20 V  
IN  
75%  
70%  
PH  
Vreg  
V
= 12 V,  
VReg = 5 V,  
Fsw = 500 kHz,  
L = 22 mH  
IN  
VReg = 5 V,  
Fsw = 500 kHz,  
L = 22 mH  
Cdly  
GND  
C
= 100 mF  
VSENSE  
COMP  
O
65%  
60%  
C
T
= 100 mF,  
= 25oC  
Rslew = 5 kW,  
= 25oC  
65%  
60%  
O
T
A
A
RST_TH  
OV_TH  
0
0.5  
1
1.5  
2
2.5  
3
0
0.5  
1
1.5  
2
2.5  
3
I
- Load Current - A  
I
- Load Current - A  
L
L
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.  
2
PowerPAD is a trademark of Texas Instruments.  
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 © 2009–2011, Texas Instruments Incorporated  
 
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