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LTM4639 PDF预览

LTM4639

更新时间: 2023-12-20 18:44:10
品牌 Logo 应用领域
亚德诺 - ADI 稳压器
页数 文件大小 规格书
32页 574K
描述
低 VIN、20A、DC/DC μModule 降压型稳压器

LTM4639 数据手册

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LTM4639  
TYPICAL PERFORMANCE CHARACTERISTICS  
2.5V Input Efficiency Graph  
3.3V Efficiency Graph  
5V Efficiency Graph  
100  
95  
90  
85  
80  
75  
70  
100  
95  
90  
85  
80  
75  
70  
100  
95  
90  
85  
80  
75  
70  
5V TO 3.3V  
5V TO 2.5V  
5V TO 1.8V  
5V TO 1.5V  
5V TO 1.2V  
5V TO 1V  
3.3V TO 2.5V  
3.3V TO 1.8V  
3.3V TO 1.5V  
3.3V TO 1.2V  
3.3V TO 1V  
2.5V TO 1.8V  
2.5V TO 1.5V  
2.5V TO 1.2V  
2.5V TO 1V  
C
= 5V  
C
= 5V  
C
= V  
PWR IN  
PWR  
PWR  
FREQ = 350kHz  
FREQ = 400kHz  
FREQ = 500kHz  
0
6
10 12 14 16 18 20  
0
6
10 12 14 16 18 20  
0
6
2
4
8
2
4
8
2
4
8
10 12 14 16 18 20  
OUTPUT CURRENT (A)  
OUTPUT CURRENT (A)  
OUTPUT CURRENT (A)  
4637 G01  
4639 G02  
4639 G03  
2.5V to 1V with 7.5A/µs Load  
Step, CPWR = 5V  
2.5V to 1.2V with 7.5A/µs Load  
Step, CPWR = 5V  
7V Efficiency Graph  
100  
95  
90  
85  
80  
75  
70  
V
V
OUT  
OUT  
V
= 80mV  
V
= 80mV  
P-P  
P-P  
LOAD  
STEP  
0A TO 7.5A  
LOAD  
STEP  
0A TO 7.5A  
7V TO 5V  
7V TO 3.3V  
7V TO 2.5V  
7V TO 1.8V  
7V TO 1.5V  
7V TO 1.2V  
7V TO 1V  
4639 G05  
4639 G06  
50µs/DIV  
50µs/DIV  
C
= V  
IN  
PWR  
FREQ = 550kHz  
COMPA CONNECTED TO COMPB  
COMPA CONNECTED TO COMPB  
C
C
= 180pF, C  
= 22pF, C  
= 180pF  
C
C
= 180pF, C  
= 22pF, C  
= 180pF  
FF  
OUT  
BOT  
COMPA  
FF  
OUT  
BOT  
COMPA  
0
6
2
4
8
10 12 14 16 18 20  
= 100µF CER ×2,  
= 100µF CER ×2,  
OUTPUT CURRENT (A)  
680µF 2.5V 6mΩ POSCAP ×2  
680µF 2.5V 6mΩ POSCAP ×2  
4639 G03  
2.5V to 1.5V with 7.5A/µs Load  
Step, CPWR = 5V  
3.3V to 1V with 7.5A/µs Load  
Step, CPWR = 5V  
3.3V to 1.2V with 7.5A/µs Load  
Step, CPWR = 5V  
V
V
V
OUT  
= 80mV  
P-P  
OUT  
OUT  
V
=
V
= 80mV  
V
P-P  
80mV  
P-P  
LOAD  
STEP  
0A TO 7.5A  
LOAD  
STEP  
0A TO  
7.5A  
LOAD  
STEP  
0A TO 7.5A  
4639 G07  
4639 G08  
4639 G09  
50µs/DIV  
50µs/DIV  
50µs/DIV  
COMPA CONNECTED TO COMPB  
COMPA CONNECTED TO COMPB  
COMPA CONNECTED TO COMPB  
C
C
= 180pF, C  
= 22pF, C  
= 180pF  
C
C
= 180pF, C  
= 22pF, C  
= 180pF  
C
C
= 180pF, C  
= 22pF, C  
= 180pF  
FF  
OUT  
BOT  
COMPA  
FF  
OUT  
BOT  
COMPA  
FF  
OUT  
BOT  
COMPA  
= 100µF CER ×2,  
= 100µF CER ×2,  
= 100µF CER ×2,  
680µF 2.5V 6mΩ POSCAP ×2  
680µF 2.5V 6mΩ POSCAP ×2  
680µF 2.5V 6mΩ POSCAP ×2  
4639f  
5
For more information www.linear.com/LTM4639  

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