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MAX77503

更新时间： 2024-11-19 14:58:23
品牌 Logo 应用领域
亚德诺 - ADI 转换器
页数 文件大小 规格书
33页 2216K
描述
14V输入、1.5A、高效Buck转换器，9μA IQ

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中文翻译

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MAX77503 数据手册

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EVALUATION KIT AVAILABLE  
Click here for production status of specific part numbers.  
MAX77503  
14V Input, 1.5A High-Efficiency  
Buck Converter with 9μA I  
Q
General Description  
Benefits and Features  
The MAX77503 is a synchronous 1.5A step-down DC-  
DC converter optimized for portable 2-cell and 3-cell bat-  
tery-operated and USB-C applications. The converter op-  
erates on an input supply between 3V and 14V. Output  
voltage is adjustable between 0.8V and 5V in 50mV steps  
● 1.5A Single Channel Buck Regulator  
● 3V to 14V Input Voltage Range  
● 0.8V to 99%V  
Output Voltage Range  
SUP  
2
• 0.8V to 5V I C Programmable in 50mV Steps  
• 1.55V to 99%V  
Resistors  
with External Feedback  
SUP  
2
through an I C serial interface or 1.55V to 99% of the sup-  
ply voltage with external feedback resistors. Factory-pro-  
grammed default voltages of 1.2V, 1.8V, and 3.3V are of-  
fered to reduce component count for common rails. The  
• 1.2V, 1.8V, or 3.3V Factory Preset Options  
● High-Efficiency, Low-I Extends Battery Life  
Q
• 94% Peak Efficiency at 7.4V  
, 3.3V  
(2520  
OUT  
SUP  
device features a low-I SKIP mode which allows excel-  
Q
Inductor)  
lent efficiency at light loads.  
• 9μA I (12V  
Q
, 1.8V  
Internal Feedback  
OUT  
SUP  
Dedicated enable and power-OK pins allow simple hard-  
ware control. An I C serial interface is optionally used for  
full configuration and control for dynamic voltage scaling  
and system power optimization.  
Version)  
2
• Selectable Light-Load SKIP and Forced-PWM  
Modes  
● 1MHz or 550kHz Fixed-Frequency Switching  
● Hardware or Software Control  
Built-in undervoltage lockout (UVLO), output active dis-  
charge, cycle-by-cycle current limit, thermal shutdown,  
and short-circuit protection ensure safe operation under  
abnormal operating conditions.  
• Enable Input and Power-OK Output Pins  
• Optional I C Full Control Interface  
2
● Protection Features  
The MAX77503 is available in a 12-bump, 0.4mm  
pitch wafer-level package (WLP).  
• Cycle-by-Cycle Inductor Peak Current Limit  
• Short-Circuit Hiccup Mode, UVLO, and Thermal  
Shutdown Protections  
Applications  
• 1ms Default Soft-Start  
● 2-cell/3-cell High Power Density Supplies  
● Portable Li+/Li-ion Battery Powered Devices  
● Drones, HD Cameras, and Notebook Computers  
● Space-Constrained Portable Electronics  
● Small Size  
• 1.85mm x 1.4mm (0.7mm max. height) WLP  
• 12-Bump, 0.4mm Pitch, 3 x 4 Array  
Ordering Information appears at end of data sheet.  
Simplified Application Circuit  
EFFICIENCY vs. LOAD  
7.4V SUPPLY, 2520 INDUCTOR CASE SIZE  
100  
MAX77503  
3V TO 14V  
DC INPUT  
BST  
SUP  
0.22μF  
90  
4.7μF  
L
LX  
V
OUT  
80  
70  
60  
50  
40  
30  
20  
10  
0
C
1.5A MAX  
OUT  
OUT  
VOUT = 5.0V (EXT FB)  
V OUT = 3.3V (INT FB)  
EN  
HARDWARE  
BIASEN  
SDA  
POK  
POWER OK  
2.2μF  
VOUT = 1.8V (INT FB)  
VOUT = 1.2V (INT FB)  
OR SOFTWARE  
ENABLE  
V
L
V OUT = 0.8V (INT FB)  
SCL  
FEEDBACK  
V
OUT  
RANGE  
AGND  
PGND  
INTERNAL  
EXTERNAL  
0.8V TO 5V  
1.55V TO 99%VSUP  
SKIP MODE  
0.1  
LOAD CURRENT (A)  
0.00001 0.0001 0.001  
0.01  
1
10  
14V, 1.5A HIGH-EFFICIENCY BUCK CONVERTER  
OPTIMIZED FOR 2 OR 3 CELL BATTERY APPLICATIONS  
19-100131; Rev 2; 12/18  
 
 
 
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