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MAX77859

更新时间： 2024-09-16 14:58:11
品牌 Logo 应用领域
亚德诺 - ADI 光电二极管
页数 文件大小 规格书
58页 5796K
描述
2.5V to 22V Input, 7.8A Switching Current High-Efficiency Buck-Boost Converter for USB-PD/PPS Applications

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MAX77859 数据手册

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Click here to ask an associate for production status of specific part numbers.  
2.5V to 22V Input, 7.8A Switching Current  
MAX77859  
High-Efficiency Buck-Boost Converter  
for USB-PD/PPS Applications  
Product Highlights  
Simplified Application Diagram  
C
C
BST2  
0.22μF  
25V 0603  
BST1  
•
•
Wide Input Voltage Range: 2.5V to 22V  
Programmable Output Voltage  
0.22μF  
25V 0603  
L
1.5μH  
USING INTERNAL FEEDBACK RESISTORS  
R
10m  
SENSE  
• 3.2V to 16V with Internal Feedback Resistors  
• 3.0V to 20V with External Feedback Resistors,  
See Table 1  
USB Type-C® Power Delivery (PD)/Programmable  
Power Supply (PPS)  
BST1 LX1  
LX2 BST2  
DC SOURCE  
2.5V TO 22V  
IN  
OUT  
C
C
OUT  
IN  
2x 22μF  
25V 0805  
2x 10μF  
35V 1206  
MAX77859  
FB  
EN  
ENABLE  
FPWM  
SRP  
SRN  
FPWM  
•
•
V
IO  
IO SUPPLY  
1.08V TO 2.0V  
V
L
V
IO  
C
2.2μF  
VL  
R
15k  
0402  
PU  
C
VIO  
0.47μF  
10V 0402  
6.3V 0402  
POK/  
• 20mV Output Voltage Step Size  
• 50mA Output Current Limit Step Size  
SCL  
SDA  
OPTIONAL  
2
POKB/INTB  
SEL  
INTERRUPT  
I
C INTERFACE  
AGND  
PGND  
*CHOOSE R VALUE  
SEL  
BASED ON TABLE 2  
*
R
SEL  
Maximum Output Current  
• Buck Mode: Up to 6A  
• Boost Mode: Up to 4A (V = 3.7V, V  
= 5V)  
Pin Description  
IN  
OUT  
TOP VIEW  
(BUMP SIDE DOWN)  
•
•
•
7.8A Typical Switching Current  
Automatic SKIP Mode and Forced-PWM Mode  
MAX77859  
1
2
3
4
5
6
7
R
Configuration  
SEL  
2
+
POKB/  
INTB  
• I C Interface Target Address  
A
B
C
D
E
F
LX2  
OUT  
OUT  
OUT  
OUT  
BST2  
FB  
• Switching Current Limit Threshold  
• Internal/External Feedback Resistors  
LX2  
PGND  
PGND  
LX1  
LX2  
PGND  
PGND  
LX1  
LX2  
PGND  
PGND  
LX1  
PGND  
PGND  
PGND  
PGND  
BST1  
SRN  
SEL  
SRP  
2
•
I C Programming  
PGND  
PGND  
IN  
V
L
• Output Voltage (DVS)  
• Slew Rate of Output Voltage Change  
• Output Current Limit Threshold  
• Switching Current Limit Threshold  
• Switching Frequency  
• Forced-PWM Mode Operation (FPWM)  
• Loop Compensation  
FPWM  
EN  
AGND  
SCL  
LX1  
IN  
IN  
IN  
SDA  
V
IO  
• Power-OK (POK) and Fault Status/Interrupts  
42 WLP  
(3.01mm x 2.78mm, 0.4mm PITCH)  
•
•
•
Output Active Discharge  
Open-Drain Status/Interrupts Pin  
Available in a 3.01mm x 2.78mm 42 Wafer-Level  
Packaging (WLP) or 4.0mm x 4.0mm 19 FC2QFN  
•
Space-Constrained Applications  
USB-C® PD DRP design is complex and extremely  
limited in real estate, especially close to the port area.  
A buck-boost topology design is required to enable  
USB PD, but the solution size is the critical  
bottleneck. The MAX77859 is a fully integrated buck-  
boost converter to help shrink the solution size by  
80% plus compared to a discrete buck-boost solution  
with similar output power capability.  
Key Applications  
•
USB PD 3.0 (PPS) Dynamically-Reconfigurable  
Processor (DRP) Applications  
The highest output power from any existing ultrabook  
Universal Serial Bus (USB) Type-C® port is 15W, 5V,  
and 3A. The MAX77859 can enable USB PD output  
up to 30W, and it is PPS compliant, which can double  
the charging speed of any USB Type-C PD-compliant  
smartphone and peripherals. When implemented, a  
15-minute quick recharge on the peripheral from the  
ultrabook can enable hours of operation to get  
through the day.  
USB Type-C and USB-C are registered trademarks of USB  
Implementers Forum.  
Ordering Information appears at end of data sheet  
19-101672; Rev 1; 05/23  
© 2023 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners.  
 
 
 
 
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