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MAX77857

更新时间： 2024-09-16 14:58:15
品牌 Logo 应用领域
亚德诺 - ADI 升压转换器开关
页数 文件大小 规格书
53页 3190K
描述
2.5V至16V输入、7A开关电流高效降压-升压转换器

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MAX77857 数据手册

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Click here to ask an associate for production status of specific part numbers.  
2.5V to 16V Input, 7A Switching Current  
High-Efficiency Buck-Boost Converter  
MAX77857  
Benefits and Features  
General Description  
•
•
Wide Input Voltage Range: 2.5V to 16V  
Default Output Voltage  
The MAX77857 is a high-efficiency, high-performance  
buck-boost converter targeted for systems requiring a  
wide input voltage range (2.5V to 16V). It features 7A  
switching current and can supply up to 6A output current  
in buck mode and up to 4A in boost mode (Boost Ratio  
≤ 1.3). It operates in PWM mode and implements an  
automatic SKIP mode to improve light-load efficiency.  
•
5V with Internal Feedback Resistors  
•
3V to 15V with External Feedback Resistors  
2
•
•
I C-Programmable Output Voltage after Startup  
•
4.5V to 15V with Internal Feedback Resistors  
3.0V to 15V with External Feedback Resistors,  
See Table 1  
•
The default output voltage is 5V when using internal  
feedback resistors. It can also be configured to any  
default output voltages between 3V and 15V when using  
external feedback resistors. The output voltage is  
adjustable dynamically through the I C serial interface  
(see the Output Voltage Configuration section).  
Maximum Output Current  
• Buck Mode: Up to 6A  
• Boost Mode: Up to 4A (Boost Ratio ≤ 1.3)  
2
•
•
7A Typical Switching Current  
R
Configuration  
SEL  
The SEL pin allows a single external resistor to program  
four different I C interface slave addresses, four  
2
•
•
•
I C Interface Slave Address  
2
Switching Current Limit Threshold  
Internal/External Feedback Resistors  
different switching current limit thresholds, and selection  
between external/internal feedback resistors. The  
different switching current limit thresholds allow the use  
of lower profile and smaller external components that are  
optimized for a particular application. The use of external  
feedback resistors allows for a wider output voltage  
range and customizable output voltages at startup.  
2
•
I C Programming  
•
Output Voltage (DVS)  
•
•
•
•
•
Slew Rate of Output Voltage Change  
Switching Current Limit Threshold  
Switching Frequency  
Forced PWM Mode Operation (FPWM)  
Power-OK (POK) Status and Fault Interrupt  
Masks  
2
The I C serial interface is optional and allows for  
dynamically controlling the output voltage, slew rate of  
the output voltage change, switching-current limit  
threshold, switching frequency, and forced PWM mode  
•
•
•
Soft-Start  
Output Active Discharge  
2
operation. The I C-programmed settings have priority  
Open-Drain Power-OK (POK) Monitor and Fault  
Condition Interrupt (MAX77857B/C Only)  
Protection Features  
• Undervoltage Lockout (UVLO)  
• Overcurrent Protection (OCP)  
• Overvoltage Protection (OVP)  
• Thermal Shutdown (THS)  
over the R  
decoded settings.  
SEL  
•
The MAX77857 is available in a 2.83mm x 2.03mm, 35-  
bump and 31-bump wafer-level package (WLP) and a  
3.5mm x 3.5mm, 16-lead Flip Chip QFN package  
(FC2QFN).  
Applications  
•
•
High Density Interconnect (HDI) PCB not Required  
(See the PCB Layout Guideline section)  
Available in 2.83mm x 2.03mm 35 WLP or 31 WLP  
or 3.5mm x 3.5mm 16 FC2QFN  
•
•
•
USB Power Delivery (USB-PD) OTG  
®
™
Qualcomm Quick Charge  
USB V Supply and DRP (Dual Role Power) Ports  
BUS  
•
•
•
•
DSLR, DSLR Lens  
Display Power  
Up to 3-Cell Li-Ion Battery Applications  
Notebook Computer, Tablet PC  
Ordering Information appears at end of data sheet.  
Qualcomm Quick Charge is a product of Qualcomm Technologies, Inc. and/or its subsidiaries.  
19-101423; Rev 3; 9/22  
© 2022 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners.  
One Analog Way, Wilmington, MA 01887 U.S.A. | Tel: 781.329.4700 | © 2022 Analog Devices, Inc. All rights reserved.  
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