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MAX767

更新时间： 2023-12-20 18:45:04
品牌 Logo 应用领域
亚德诺 - ADI 控制器
页数 文件大小 规格书
19页 1374K
描述
5V至3.3V输出、同步整流、降压型电源控制器

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MAX767 数据手册

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19-0224; Rev 3; 7/00  
5V-to-3.3V, Synchronous, Step-Down  
Power-Supply Controller  
________________General Description  
____________________________Features  
ꢀ >90% Efficiency  
ꢀ 700µA Quiescent Supply Current  
ꢀ 120µA Standby Supply Current  
ꢀ 4.5V-to-5.5V Input Range  
ꢀ Low-Cost Application Circuit  
ꢀ All N-Channel Switches  
ꢀ Small External Components  
ꢀ Tiny Shrink-Small-Outline Package (SSOP)  
The MAX767 is a high-efficiency, synchronous buck  
controller IC dedicated to converting a fixed 5V supply  
into a tightly regulated 3.3V output. Two key features set  
this device apart from similar, low-voltage step-down  
switching regulators: high operating frequency and all  
N-channel construction in the application circuit. The  
300kHz operating frequency results in very small, low-  
cost external surface-mount components.  
The inductor, at 3.3µH for 5A, is physically at least five  
times smaller than inductors found in competing solu-  
tions. All N-channel construction and synchronous rectifi-  
cation result in reduced cost and highest efficiency.  
Efficiency exceeds 90% over a wide range of loading,  
eliminating the need for heatsinking. Output capacitance  
requirements are low, reducing board space and cost.  
ꢀ Predesigned Applications:  
Standard 5V to 3.3V DC-DC Converters up to 10A  
High-Accuracy Pentium P54C VR-Spec Supply  
ꢀ Fixed Output Voltages Available:  
3.3V (Standard)  
3.45V (High-Speed Pentium™)  
3.6V (PowerPC™)  
The MAX767 is a monolithic BiCMOS IC available in  
20-pin SSOP packages. For other fixed output voltages  
and package options, please consult the factory.  
_______________Ordering Information  
PIN-  
PACKAGE  
REF  
TOL  
V
(V)  
OUT  
________________________Applications  
PART  
TEMP. RANGE  
Local 5V-to-3.3V DC-DC Conversion  
Microprocessor Daughterboards  
Power Supplies up to 10A or More  
MAX767CAP  
0°C to +70°C  
20 SSOP  
20 SSOP  
20 SSOP  
20 SSOP  
Dice*  
1.ꢀ% 3.3  
1.ꢀ% 3.45  
1.ꢀ% 3.6  
1.2% 3.3  
MAX767RCAP 0°C to +70°C  
MAX767SCAP 0°C to +70°C  
MAX767TCAP 0°C to +70°C  
MAX767C/D  
0°C to +70°C  
—
—
Ordering Information continued at end of data sheet.  
* Contact factory for dice specifications.  
_________Typical Application Circuit  
INPUT  
4.5V TO 5.5V  
__________________Pin Configuration  
TOP VIEW  
V
ON  
CC  
BST  
DH  
CS  
SS  
FB  
1
2
3
4
5
6
7
8
9
OUTPUT  
3.3V  
AT 5A  
20  
19  
18  
17  
16  
15  
14  
13  
12  
11  
3.3 H  
DH  
LX  
ON  
LX  
MAX767  
GND  
BST  
DL  
MAX767  
DL  
GND  
GND  
GND  
REF  
PGND  
V
CC  
CS  
FB  
V
CC  
PGND  
N.C.  
SYNC  
REF  
GND  
V
GND  
CC 10  
SSOP  
Pentium is a trademark of Intel. PowerPC is a trademark of IBM.  
________________________________________________________________ Maxim Integrated Products  
1
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,  
or visit Maxim’s website at www.maxim-ic.com.  
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