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TPS54162-Q1

更新时间： 2024-09-18 12:21:47
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德州仪器 - TI 转换器
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41页 2527K
描述
1-A 60-V STEP-DOWN DC/DC CONVERTER WITH LOW QUIESCENT CURRENT

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TPS54162-Q1 数据手册

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TPS54162-Q1  
www.ti.com  
SLVSA32C –OCTOBER 2009–REVISED MAY 2010  
1-A 60-V STEP-DOWN DC/DC CONVERTER WITH LOW QUIESCENT CURRENT  
Check for Samples: TPS54162-Q1  
1
FEATURES  
•
Asynchronous Switch Mode Regulator  
•
Programmable Overvoltage, Undervoltage  
Output Monitor  
•
3.6 V to 48 V Operating Range, Withstands  
Transients up to 60 V  
•
•
•
Thermal Sensing and Shutdown  
Switch Current Limit Protection  
•
•
•
•
•
•
•
•
•
•
•
1 A Maximum Load Current  
50 µA Typical Quiescent Current  
Short Circuit and Overcurrent Protection of  
FET  
200 kHz to 2.2 MHz Switching Frequency  
0.8 V ± 1.5% Voltage Reference  
•
•
Junction Temperature Range: –40°C to 150°C  
20-Pin HTSSOP PowerPAD™ Package  
High Voltage Tolerant Enable Input  
Soft Start on Enable Cycle  
APPLICATIONS  
Slew Rate Control on Internal Power Switch  
Low-Power Mode for Light Load Conditions  
Programmable Delay for Power-On Reset  
External Compensation for Error Amplifier  
•
•
•
•
•
Qualified for Automotive Applications  
Automotive Telematics  
Navigation Systems  
In-Dash Instrumentation  
Reset Function Filter Time for Fast Negative  
Transients  
Battery Powered Applications  
DESCRIPTION  
The TPS54162 is a step-down switch-mode power supply with a voltage supervisor and an integrated NMOS  
switching FET. 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. The device also features  
low-power mode operation under light load conditons which reduces the supply current to 50 µA (typical). By  
pulling the EN pin low, the supply shutdown current is reduced to 1 µA (typical).  
An open drain reset signal indicates when the nominal output drops below the reset threshold set by an external  
resistor divider network. The output voltage start up ramp is controlled by a soft start capacitor. There is an  
internal undervoltage shut down which is activated when the input supply ramps down to 2.6 V. The device is  
protected during an overload condition on output by frequency fold back operation, and also has a thermal  
shutdown protection.  
TYPICAL APPLICATION  
TYPICAL CONVERTER EFFICIENCY  
90  
D1  
TPS54162  
VReg  
VIN  
VIN  
EN  
VBATT  
R12  
RST  
80  
70  
60  
50  
40  
30  
20  
10  
0
C1  
R11  
R10  
VIN = 14 V  
VIN = 7 V  
RESET  
BOOT  
C3  
D2  
L
VReg  
C4  
PH  
LPM  
C7  
R9  
SYNC  
R4  
R5  
R7  
C6  
Rslew  
VSENSE  
SS  
C8  
C5  
VReg = 5 V  
fsw = 500 kHz  
L = 22 µH  
C = 100 µF  
Rslew = 30 kW  
TA = 25°C  
R6  
R8  
C2  
COMP  
RT/CLK  
R1  
R2  
R3  
RST_TH  
Cdly  
GND  
OV_TH  
0.05  
0.25 0.5  
ILoad - Load Current - A  
0.75  
1
Figure 1.  
Figure 2.  
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.  
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 © 2009–2010, Texas Instruments Incorporated  
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