SC908 查看數據表（PDF） - Semtech Corporation
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SC908 Datasheet PDF : 30 Pages
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SC908
Electrical Characteristics (continued)
Parameter
Symbol
DC-DC Buck Converter (continued)
Buck Converter P-Channel Peak
Current Limit
Buck Converter P-Channel
On-Resistance
Buck Converter N-channel
On-Resistance
Buck Converter
Oscillator Frequency
I
LIM_P
R
DS(ON)P
R
DS(ON)N
f
OSC
Buck Converter
Start-Up Time (5,10)
t
SU-SVOUT
Linear Low Drop-Out (LDO) Regulator
LDO Input Voltage
LDO Under Voltage
Lockout Rising Threshold
LDO Under Voltage
Lockout Falling Threshold
LDO Under Voltage
Lockout Hysteresis
LDO Nominal Output
Voltage Minimum (10)
LDO Nominal Output
Voltage Maximum (10)
LDO Feedback
Regulation Voltage
V
LVIN
VT
LUVLO-R
VTLUVLO-F
VTLUVLO-HYS
VLVOUT_MIN
VLOUT_MAX
VLFB
LDO Output Voltage
VLVOUT
LDO Dropout Voltage
V
L_DO
LDO Load Regulation
(with respect to 1mA load) (9)
ΔV
LVOUT_LOAD
Conditions
I = 150mA
SVOUT
I = 150mA
SVOUT
I = 150mA, V to 95%
SVOUT
SVOUT
VSVOUT = 1V
V = 1.8V
SVOUT
V = 2.2V
SVOUT
V = 3.0V
SVOUT
V ≥ 2.8V
BAT
VLVIN > VLVOUT +300mV
VLVIN > VLVOUT +300mV
VLVIN = 3.7V, ILVOUT = 1mA
R = 54.9kΩ, R = 39.2kΩ
L1
L2
V = 3.7V, I = 1mA
LVIN
LVOUT
V = 2.2V, I = 100mA
LVOUT
LVOUT
V = 3.0V, I = 150mA
LVOUT
LVOUT
R = 54.9kΩ, R = 39.2kΩ
L1
L2
(V
LVOUT
=
1.8V),
V
LVIN
=
2.2V
1mA ≤ I ≤ 100mA
LVOUT
R = 54.9kΩ, R = 39.2kΩ
L1
L2
(V
LVOUT
=
1.8V),
V
LVIN
=
3.7V
1mA ≤ I ≤150mA
LVOUT
Min
Typ
Max
Units
410
440
470
mA
0.75
Ω
1.05
Ω
0.85
1.00
1.15
MHz
0.3
1.3
1.45
ms
1.8
2
2.2
VBAT
V
1.95
2.05
V
1.75
1.85
V
120
mV
1.5
V
3.3
V
0.75
V
1.73
1.8
1.85
V
115
200
mV
130
225
mV
-10
10
mV
-10
10
mV
6
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