參數(shù)資料
型號: SC4624
廠商: Semtech Corporation
英文描述: Low Input Voltage, High Efficiency, 4A Integrated FET Synchronous Step down DC/DC Regulator
中文描述: 低輸入電壓,高效率及4A集成FET的同步降壓直流/直流穩(wěn)壓器
文件頁數(shù): 7/20頁
文件大?。?/td> 738K
代理商: SC4624
7
2007 Semtech Corp.
www.semtech.com
SC4624
Thermal protection
POWER MANAGEMENT
Operation
Typical Performance Characteristics (Cont.)
Over current protection
Circuit condition: Application circuit#1, 5V
IN
, 1V
OUT
Figure 11. High-Side P-MOSFET
Figure 12. Low-Side N-MOSFET
Figure 7. Over Load Hiccup
Figure 9. Synchronization
Figure 10. Efficiency(V
IN
)
OUT
SS
SS
Figure 8. Thermal Shutdown Protection@0A
V
Vout
SS
SS
V
Sync
Signal
Output Current(A)
70
80
90
100
110
120
130
1
2
3
4
2.5V
IN
3.3V
IN
5V
IN
R
D
)
I
OUT
(A)
Internal PMOS R
DSON
@ Room Temperature
Internal NMOS R
DSON
@ Room Temperature
50
55
60
65
70
75
80
1
2
3
4
2.5V
IN
3.3V
IN
5V
IN
R
D
)
I
OUT
(A)
5.0V/DIV
3.0V/DIV
0.6V/DIV
2.0V/DIV
2.0V/DIV
0.6V/DIV
3V/DIV
5.0V/DIV
Test condition: 5Vin, 1Vout
Vphase
Vout
100ms/DIV
Test condition: 5Vin, 1Vout
Vphase
1s/DIV
Efficiency
ˇ
ˇ
ˉ
ˉ
ˊ
ˊ
ˋ
ˋ
ˇ
5Vin
3.3Vin
2.5Vin
E
SYNC
SYNC
Vphase
1us/DIV
External clock singal=650kHz, duty=50%
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