SC4605 查看數據表（PDF） - Semtech Corporation
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SC4605 Datasheet PDF : 19 Pages
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POWER MANAGEMENT
Electrical Characteristics (Cont.)
Unless otherwise specified, VCC = 5V, CT = 470pF, TA = -40°C to 85°C, TA = TJ.
Parameter
Test Conditions
Min
Typ
Oscillator
Initial Accuracy
Minimum Operation Frequency (1)
TA = 25°C
255
300
100
Maximum Operation Frequency (1)
600
Ramp Peak to Valley (1)
1.5
Ramp Peak Voltage (1)
2.0
Ramp Valley Voltage (1)
0.5
Sleep, Soft Start, Current Limit
Sleep Threshold
Measured at FS
Soft Start Time (1)
1.8
ISET Bias Current
Current Limit Blank Time (1)
TJ = 25°C
-43
-50
150
Gate Drive
Duty Cycle
0
Peak Source (DRVH) (2)
Peak Sink (DRVH) (2)
Peak Source (DRVL) (2)
Peak Sink (DRVL) (2)
Output Rise Time (2)
Output Fall Time (2)
Minimum Non-Overlap (1)
Vgs = 5V, ISOURCE = 100mA
Vgs = 5V, ISINK = 100mA
Vgs = 5V, ISOURCE = 100mA
Vgs = 5V, ISINK = 100mA
Vgs = 5V, COUT = 4.7nF
35
Vgs = 5V, COUT = 4.7nF
35
30
40
Notes:
(1). Guaranteed by design.
(2). Guaranteed by characterization.
(3) This device is ESD sensitive. Use of standard ESD handling precautions is required.
SC4605
Max
Unit
345
kHz
kHz
kHz
V
V
V
0.2
V
ms
-57
µA
ns
97
%
3
Ω
3
Ω
3
Ω
3
Ω
ns
ns
ns
2004 Semtech Corp.
3
www.semtech.com
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