SC4607
POWER MANAGEMENT
Electrical Characteristics (Cont.)
Unless otherwise specified, VCC = 3.3V, CT = 270pF, TA = -40°C to 85°C, TA=TJ
Parameter
Test Conditions
Min
Typ
Max
Unit
Error Amplifier (Cont.)
VOUT High
I
COMP = -5.5mA
VCC - 0.5 VCC - 0.3
0.3
V
VOUT Low
I
COMP = 5.5mA
0.45
625
Oscillator
Initial Accuracy
TA = 25°C
525
50
575
0.5
kHz
%/V
%/°C
kHz
Hz
Voltage Stability
TA = 25°C, VCC = 2.25V to 5.5V
TA = -40°C to 85°C
Temperature Coefficient
Minimum Operation Frequency (1)
Maximum Operation Frequency (1)
Ramp Peak to Valley
Ramp Peak Voltage
Ramp Valley Voltage
Sleep, Soft Start, Current Limit
Sleep Threshold
0.02
1M
1
V
1.3
0.3
V
V
Measured at FS
VSYNC = 0V
75
mV
µA
Sleep Input Bias Current
Soft Start Time (1)
-1
1.2
FSW = 575 KHz
TJ = 25°C
ms
ISET Bias Current
-45
-50
0.28
130
-55
µA
Temperature Coefficient of ISET
Current Limit Blank Time (1)
Gate Drive
%/°C
ns
Duty Cycle
97
%
Ω
Pull-Up Resistance (DRVH)(2)
VBST - VPHASE = 3.3V, ISOURCE = -100mA
VBST - VPHASE = 3.3V, ISINK = 100mA
VCC = 3.3V, ISOURCE = -100mA
VCC = 3.3V, ISINK = 100mA
2.7
2.4
2.2
1.5
35
(2)
Pull-Down Resistance (DRVH)
Ω
(1)
Pull-Up Resistance (DRVL)
Ω
(2)
Pull-Down Resistance (DRVL)
Ω
Output Rise Time
VCC = 3.3V, COUT = 4.7nF
ns
ns
ns
Output Fall Time
VCC = 3.3V, COUT = 4.7nF
27
Minimum Non-Overlap (1)
40
Notes:
(1). Guaranteed by design.
(2). Guaranteed by characterization.
2005 Semtech Corp.
3
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SEMTECH [ SEMTECH CORPORATION ]
