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LM51501-Q1 PDF预览

LM51501-Q1

更新时间: 2024-11-27 11:06:19
品牌 Logo 应用领域
德州仪器 - TI 控制器
页数 文件大小 规格书
43页 1817K
描述
具有 6V、6.5V、9.5V、11.5V 输出选项的汽车类 1.5V 至 42V 输入电压、低 IQ 升压控制器

LM51501-Q1 数据手册

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LM51501-Q1  
SNVSAZ0B MARCH 2018REVISED JUNE 2020  
LM51501-Q1 Wide VIN Automotive Low IQ Boost Controller  
1 Features  
2 Applications  
1
AEC-Q100 qualified:  
Automotive start-stop system  
Automotive emergency call system  
Battery-powered boost converters  
Device temperature grade 1: –40°C to +125°C  
ambient operating temperature range  
Device HBM ESD classification level 2  
Device CDM ESD Classification level C4B  
3 Description  
The LM51501-Q1 is a wide input range automatic  
boost controller. The device can be used to maintain  
a stable output voltage during automotive cranking  
from a vehicle battery or from a back-up battery.  
Functional Safety-Capable  
Documentation available to aid functional  
safety system design  
Wide VIN input range from 1.5 V to 42 V when  
VOUT 5 V (65-V absolute maximum)  
The LM51501-Q1 switching frequency is programmed  
by a resistor from 220 kHz to 2.3 MHz. Fast switching  
(2.2-MHz) minimizes AM band interference and  
allows for a small solution size and fast transient  
response.  
Low shutdown current (IQ 5 µA)  
Low standby current (IQ 15 µA)  
Four programmable output voltage options and  
two selectable configurations  
The LM51501-Q1 operates in low IQ standby mode  
when the input or output voltage is above the preset  
standby thresholds and automatically wakes up when  
the output voltage drops below the preset wake-up  
threshold.  
6.0 V, 6.5 V, 9.5 V, or 11.5 V  
Start-stop or e-Call configurations  
Adjustable switching frequency from 220 kHz to  
2.3 MHz  
The device transitions in and out of the low IQ  
standby mode to extend battery life at light load. A  
single resistor programs the target output regulation  
voltage as well as the configuration. Additional  
features include low shutdown current, boost status  
indicator, adjustable cycle-by-cycle current limit, and  
thermal shutdown. Status indicator can be used to  
control a circuit to bypass the diode when the part is  
not boosting in order to reduce power dissipation. In  
E-call mode, it can be used to control a disconnect  
switch to protect the back-up-battery.  
Automatic wake-up and standby mode transition  
Optional clock synchronization  
Boost status indicator  
1.5-A Peak MOSFET gate driver  
Adjustable cycle-by-cycle current limit  
Thermal shutdown  
16-Pin WQFN with wettable flanks  
Create a custom design using the LM51501-Q1  
with the WEBENCH® Power Designer  
Device Information(1)  
PART NUMBER  
PACKAGE  
BODY SIZE (NOM)  
LM51501-Q1  
WQFN (16)  
4.00 mm × 4.00 mm  
(1) For all available packages, see the orderable addendum at  
the end of the data sheet.  
Typical Application Circuit  
Efficiency (VLOAD = 9.5 V, FSW = 440 kHz)  
100  
VSUPPLY  
VLOAD  
95  
90  
85  
LO  
CS AGND  
PGND VOUT  
EN  
VIN  
80  
STATUS  
SYNC  
RT  
VSUPPLY=7.5V  
VSUPPLY=6.5V  
LM51501  
COMP  
VSUPPLY=5.5V  
VSUPPLY=4.5V  
VSUPPLY=3.5V  
75  
70  
VSET  
VCC  
AVCC  
0
0.3  
0.6  
0.9  
1.2  
1.5  
Load Current (A)  
1.8  
2.1  
2.4  
D008  
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,  
intellectual property matters and other important disclaimers. PRODUCTION DATA.  
 
 
 
 

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