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MAX16922

更新时间： 2024-11-07 14:58:11
品牌 Logo 应用领域
亚德诺 - ADI DC-DC转换器
页数 文件大小 规格书
18页 979K
描述
2.2MHz、双通道、降压型DC-DC转换器，带有两路LDO和/RESET功能

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中文翻译

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MAX16922 数据手册

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EVALUATION KIT AVAILABLE  
MAX16922  
2.2MHz, Dual, Step-Down DC-DC  
Converters, Dual LDOs, and RESET  
General Description  
Benefits and Features  
● 1.2A High-Efficiency 2.2MHz DC-DC Converter  
• 3.7V to 28V Operating Supply Voltage  
• 45V Load-Dump Protection  
The MAX16922 power-management integrated circuit  
(PMIC) is designed for medium-power-level automotive  
applications, and integrates multiple supplies in a small  
footprint. The device includes one high-voltage step-  
down converter (OUT1) and three low-voltage cascaded  
DC-DC converters (OUT2, OUT3, OUT4). OUT1 and  
OUT2 are step-down DC-DC converters, and OUT3/  
OUT4 are linear regulators. The device also includes  
a reset output (RESET) and a high-voltage-compatible  
enable input (EN).  
• Output Voltage: 3.0V to 5.5V  
● 600mA High-Efficiency 2.2MHz DC-DC Converter  
• 2.7V to 5.5V Supply Voltage  
• Output Voltage: 1.0V to 3.9V  
• 180° Out-of-Phase Operation  
• Forced-PWM and Auto-PWM Modes  
● LDO Linear Regulators  
The 1.2A output high-efficiency, step-down DC-DC con-  
verter (OUT1) operates from a voltage up to 28V con-  
tinuous and is protected from load-dump transients up to  
45V. The 600mA output high-efficiency step-down DC-DC  
converter (OUT2) runs from a voltage up to 5.5V. The two  
300mA LDO linear regulators offer low dropout of only  
130mV (typ). The power-good RESET output provides  
voltage monitoring for OUT1 and OUT2.  
• OUT3: 1.0V to 4.15V at 300mA  
• OUT4: 1.0V to 4.15V at 300mA  
• Separate Inputs for Increased Efficiency  
● Enable Input  
●
RESET Output Monitoring on OUT1 and OUT2  
● Overtemperature and Short-Circuit Protection  
● Available in  
OUT1 and OUT2 use fast 2.2MHz PWM switching and  
small external components. The high-voltage converter  
(OUT1) enters skip mode automatically under light loads  
to prevent an overvoltage condition from occurring at the  
output. The low-voltage synchronous DC-DC converter  
(OUT2) can operate in forced-PWM mode to prevent any  
AM band interference or high-efficiency auto-PWM mode.  
5mm x 5mm x 0.8mm, 20-Pin TQFN-EP  
4.5mm x 6.5mm, 20-Pin TSSOP-EP  
Typical Operating Circuit  
V
PV1  
PV1  
EN  
OUTS2  
LX2  
2.2µH  
4.7µF  
The MAX16922 includes overtemperature shutdown and  
overcurrent limiting. The device is designed to operate  
from -40°C to +125°C ambient temperature.  
V
OUT2  
10µF  
PWM  
PV3  
V
OUT1  
PGND2  
PV2  
BST  
4.7µF  
MAX16922  
4.7µF  
0.1µF  
4.7µH  
V
OUT3  
GND1  
GND3  
OUT3  
4.7µF  
LX1  
V
OUT1  
V
OUT2  
OUTS1  
PV4  
10µF  
4.7µF  
V
OUT1  
LSUP  
V
OUT4  
GND  
OUT4  
4.7µF  
1µF  
20kΩ  
GND2  
RESET  
EP  
Ordering Information appears at end of data sheet.  
19-5039; Rev 11; 6/18  
1234567...18

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