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MAX77827

更新时间： 2024-11-05 02:49:27
品牌 Logo 应用领域
美信 - MAXIM /
页数 文件大小 规格书
23页 998K
描述
5.5V Input, 1.8A/3.1A Switch Buck-Boost Converter with 6μA IQ

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MAX77827 数据手册

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EVALUATION KIT AVAILABLE  
Click here to ask about the production status of specific part numbers.  
MAX77827  
5.5V Input, 1.8A/3.1A Switch Buck-Boost  
Converter with 6μA I  
Q
General Description  
Benefits and Features  
The MAX77827 is a high-efficiency buck-boost regulator  
targeted for one-cell Li-ion powered applications with the  
lowest typical quiescent current in the industry of 6μA. It  
supports input voltages of 1.8V to 5.5V and an output volt-  
age range of 2.3V to 5.3V. The IC provides two different  
switching current levels (1.8A and 3.1A) to optimize ex-  
ternal component sizing based on given load current re-  
quirements. With the 1.8A switching current-limit option,  
the IC can support up to 1.0A load current in buck mode  
● 1.8V to 5.5V Input Voltage Range  
● 2.3V to 5.3V Single Resistor Adjustable Output  
Voltage  
● 1.6A Maximum Output Current (3.1A I  
Buck Mode)  
Option,  
LIM  
● 900mA Maximum Output Current (1.8A I  
Option,  
LIM  
Boost Mode 3.0V , 3.3V  
)
IN  
OUT  
● 96% Peak Efficiency (3.3V , 3.3V  
)
OUT  
IN  
● SKIP Mode for Higher Light-Load Efficiency  
and 900mA in boost mode (V = 3.0V, V  
= 3.3V).  
● 6μA Ultra-Low Typical Quiescent Current (At T =  
IN  
OUT  
J
+25°C)  
The peak efficiency of 96% makes the IC one of the best  
solutions as a DC/DC converter to supply a rail for battery-  
powered portable applications.  
● 2.5MHz Nominal Switching Frequency  
● Enable Pin  
● GPIO Pins for System Design Convenience  
• FPWM (Forced PWM) Mode Selection Pin  
• POK Indicator Pin  
The IC features an adjustable output voltage, which can  
be programmed from 2.3V to 5.3V through a single resis-  
tor. Two GPIO pins are available to support force PWM  
enable function and power-OK (POK) indicator. A unique  
control algorithm allows high-efficiency, outstanding line/  
load transient response, and seamless transition between  
buck and boost modes. These options provide design flex-  
ibility that allow the IC to cover a wide range of applica-  
tions and use cases while minimizing board space.  
● UVLO, Soft-Start, Active-Output Discharge,  
Overcurrent, and Thermal Shutdown Protections  
● 1.61mm x 2.01mm, 12-Bump WLP  
● 2.5mm x 2.5mm, 14-Lead FC2QFN  
Ordering Information appears at end of data sheet.  
The MAX77827 is available in a 1.61mm x 2.01mm,  
12-bump wafer-level package (WLP), and a 2.5mm x  
2.5mm, 14-lead FC2QFN package.  
Applications  
● 1-Cell Li+ Battery Powered Equipment  
● Smartphones/Portable/Wearables  
● Internet of Things (IoT) Devices  
● LPWAN (LTE/NB-IoT, LTE/Cat-M1)  
Simplified Block Diagram  
L
1μH  
2
14.52mm SOLUTION SIZE  
1.8V TO 5.5V  
DC SOURCE  
LX1  
LX2  
IN  
OUT  
V
OUT  
C
22μF  
C
10μF  
OUT  
IN  
2.3V TO 5.3V  
MAX77827  
OUTS  
FPWM  
POK  
FPWM ENABLE  
POWER-OK  
ENABLE  
EN  
L
2012  
BIAS  
SEL  
C
BIAS  
4.00mm  
1μF  
*
AGND  
PGND  
R
SEL  
*CHOOSE R  
VALUE BASED ON VOUT, SEE TABLE 2  
SEL  
19-100546; Rev 5; 8/21  
 
 
 
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