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MAX77504AAFC+T PDF预览

MAX77504AAFC+T

更新时间: 2024-10-01 02:52:11
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美信 - MAXIM /
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37页 1872K
描述
14V Input, 3A High-Efficiency Buck Converter in WLP or QFN

MAX77504AAFC+T 数据手册

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EVALUATION KIT AVAILABLE  
Click here to ask about the production status of specific part numbers.  
MAX77504  
14V Input, 3A High-Efficiency  
Buck Converter in WLP or QFN  
General Description  
Benefits and Features  
The MAX77504 is a synchronous 3A step-down DC-DC  
converter optimized for portable 2-cell and 3-cell battery-  
operated applications. The converter operates on an input  
supply between 2.6V and 14V. Output voltage is ad-  
justable between 0.6V and 6V with external feedback re-  
● 3A Single-Channel Buck Regulator  
● 2.6V to 14V Input Voltage  
● 0.6V to 6V Output Voltage Range  
● 0.5MHz to 1.5MHz Fixed-Frequency Switching  
Options  
sistors. The device features a low-I SKIP mode that al-  
● High Efficiency, Low I Extends Battery Life  
Q
Q
lows excellent efficiency at light loads. The MAX77504  
can be sychronized by driving the FPWM pin with an ex-  
ternal clock.  
• 94% Peak Efficiency at 7.4V , 3.3V  
IN  
(2520  
OUT  
Inductor)  
• 10μA I  
(12V , 1.8V  
)
OUT  
SUP  
IN  
Dedicated enable, power-OK, and FPWM pins allow sim-  
ple hardware control. The SEL input easily configures  
switching frequency, gain, and output active discharge op-  
tion. Built-in undervoltage lockout (UVLO), output active  
discharge, cycle-by-cycle inductor current limit, thermal  
shutdown, and short-circuit protection ensure safe opera-  
tion under abnormal operating conditions.  
• OUT Powers V Automatically (V  
> 1.7V) for  
OUT  
L
Low I  
Q
● Enable Pin (EN) for Direct Hardware Control  
● Extenal Clock Synchronization Is Available Through  
the FPWM/SYNC Pin  
● Power-OK Output (POK) Monitors V  
Ordering Information)  
Quality (See  
OUT  
The MAX77504 is offered in a small 1.7mm x 1.7mm,  
16-bump, 0.4mm pitch wafer-level package (WLP) or a  
2.5mm x 2.5mm, 12-lead, 0.5mm pitch flip-chip QFN  
(FC2QFN).  
● Protection Features  
• Cycle-by-Cycle Inductor Current Limit  
• Short-Circuit Hiccup Mode, UVLO, and Thermal  
Shutdown Protection  
• Soft-Start  
Applications  
● FC2QFN or WLP Package Option  
• 2.5mm x 2.5mm (0.6mm max. height) 12-Lead  
FC2QFN, 0.5mm Pitch  
● 1- to 3-Cell Li+/Li-ion Battery-Powered Devices  
● Professional Radio, Handheld Computers  
● Mirrorless Cameras, DSLR, and Notebook Computers  
● Portable Scanners, POS Terminals, Printers  
● Space-Constrained Portable Electronics  
• 1.7mm x 1.7mm (0.7mm max. height) 16-Bump  
WLP, 0.4mm Pitch, 4 x 4 Array  
● All WLP Package Bumps (Except POK) Routeable on  
a Non-HDI PCB  
Ordering Information appears at end of data sheet.  
Simplified Application Circuit  
EFFICIENCY vs. LOAD  
7.4V SUPPLY  
100  
MAX77504  
2.6V TO 14V  
DC INPUT  
BST  
SUP  
0.22μF  
10μF  
L
90  
LX  
V
OUT  
80  
70  
60  
50  
40  
30  
20  
10  
0
0.6V TO 6V  
3A MAX  
OUT  
C
C
OUT  
FF  
ENABLE  
EN  
R
R
TOP  
BOT  
VOUT = 5.0V  
VOUT = 3.3V  
FPWM/SYNC  
POWER-OK  
FPWM  
POK  
SEL  
FB  
VOUT = 1.8V  
R
SEL  
V
L
2.2μF  
AGND  
PGND  
R
SEL  
CONTROLS:  
● SWITCHING FREQ.  
● ACTIVE DISCHARGE  
● GAIN  
SKIP MODE  
1
0.001  
0.01  
0.1  
14V, 3A HIGH-EFFICIENCY BUCK CONVERTER  
OPTIMIZED FOR 2 OR 3 CELL BATTERY APPLICATIONS  
LOAD CURRENT (A)  
19-100678; Rev 2; 7/20  
 
 
 

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