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參數(shù)資料
| 型號(hào)： | SC2440TETRT |
| 廠商： | Semtech Corporation |
| 英文描述： | 2.5 MHz Dual Switching Regulator with Integrated 2A Switches |
| 中文描述： | 2.5 MHz雙開關(guān)穩(wěn)壓器集成甲開關(guān) |
| 文件頁數(shù)： | 3/26頁 |
| 文件大?。?/td> | 643K |
| 代理商： | SC2440TETRT |
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3
2005 Semtech Corp.
www.semtech.com
SC2440
POWER MANAGEMENT
Electrical Characteristics (Cont.)
Unless specified: -40°C < T
A
< 85°C, -40°C < T
J
< 105°C, R
OSC
= 12.1K
, V
SYNC
= 0, V
IN
= 5V, V
BOOST
= 8V
Parameter
Conditions
Min
Typ
Max
Units
COMP Switching Threshold
0.7
1.1
1.3
V
COMP Maximum Voltage
V
FB
= 0.9V
2.2
V
Channel Switching Frequecy
1.2
1.4
1.6
MHz
Maximum Duty Cycle
(Note 2)
80
90
%
Switch Current Limit
V
FB
= 0.9V, V
SS
= 2.3V, COMP Pin Open
2
2.6
A
Switch Saturation Voltage
I
SW
= -2A
0.3
0.48
V
Switch Leakage Current
10
μA
Minimum Boost Voltage
I
SW
= -2A
1.8
2.5
V
Boost Pin Current
I
SW
= -0.5A
20
30
mA
I
SW
= -2A
60
80
mA
Minimum Soft-Start Voltage to Exit
Shutdown
SS1 Tied to SS2
0.2
0.4
0.7
V
Soft-start Charging Current
V
SS
= 0V
2
μA
V
SS
= 1.5V
1.8
μA
Soft-start Discharging Current
V
SS
= 1.5V
0.8
μA
Minimum Soft-start Voltage to
Enable Overload Shutoff
V
SS
Rising
2
V
FB Overload Threshold
V
SS
= 2.3V, V
FB
Falling
0.74
V
Soft-start Voltage to Restart
Switching After Overload Shutoff
V
SS
Falling
0.7
1
1.3
V
Power Good Threshold Below FB
V
FB
Rising
80
100
120
mV
Power Good Output Low Voltage
V
FB
= 0.8V, I
PGOOD
= 250μA
0.2
0.4
V
Power Good Pin Leakage Current
V
PGOOD
= 5V
0.1
1
μA
SYNC Input High Voltage
2
V
SYNC Input Low Voltage
(Note 1)
0.8
V
SYNC Frequency
SYNC Frequency = 2 X Channel
Frequency. (Note 1)
3.4
5
MHz
SYNC Pin Input Current
V
SYNC
= 2V
60
75
μA
Thermal Shutdown Temperature
155
°C
Thermal Shutdown Hysteresis
10
°C
Notes: (1) Guaranteed by design, not tested in production.
(2) The maximum duty cycle specified corresponds to 1.4MHz switching frequency. Duty cycles higher than those specified can be
achieved by lowering the operating frequency.
(3) This device is ESD sensitive. Use of standard ESD handling precautions is required.
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| SC2441ATETRT | 1.8V to 20V Input 2-Phase Synchronous Step-down Controllers with Step-up Converter |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SC2441 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Very Low Input Voltage 2-Phase Synchronous Step-down Controllers with Step-up Converter |
| SC2441A | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:1.8V to 20V Input 2-Phase Synchronous Step-down Controllers with Step-up Converter |
| SC2441A_09 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:1.8V to 20V Input 2-Phase Synchronous Step-down Controllers with Step-up Converter |
| SC2441AEVB | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:1.8V to 20V Input 2-Phase Synchronous Step-down Controllers with Step-up Converter |
| SC2441ATETRT | 制造商:Semtech Corporation 功能描述: |
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