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
Core Functions (Excluding Charger)
Core Circuits Quiescent
Current (4)
I
Q-Core
VREF Reference Voltage
V
VREF
VREF Power Supply Rejection
PSRR
REF
VREF Reference Voltage Start-Up
Time (5, 10)
t
SU_REF
DC-DC Buck Converter
Buck Converter Input Voltage
Buck Converter Under-Voltage
Lockout Rising Threshold
Buck Converter Under-Voltage
Lockout Falling Threshold
Buck Converter Under-Voltage
Lockout Hysteresis
Buck Converter Quiescent
Current (2)
Buck Converter Minimum
On-Time
Buck Converter Maximum
Duty Cycle (10)
Buck Converter Program Output
Voltage Minimum (6,10)
Buck Converter Program Output
Voltage Maximum(6,7,8,10)
Buck Converter Feedback
Regulation Voltage
V
SVIN
VT
SUVLO-R
VT
SUVLO-F
VT
SUVLO-HYS
I
BAT-Q
t
SON_MIN
SDC
MAX
V
SVOUT_MIN
V
SVOUT_MAX
V
SFB
Buck Converter Output Voltage(6)
V
SVOUT
Buck Converter
Line Regulation(6)
Buck Converter
Load Regulation (6)
VSVOUT_LINE
V
SVOUT_LOAD
Conditions
V = V = 0V,
VAD
SEN
V = V = 4.2V
LEN
BAT
V = 3.7V with 0.5V ripple,
BAT
P-to-P
f ≤ 10kHz, C = 10nF
VREF
Delay from first of SEN high
LEN high, V = 3.7V
BAT
C = 10nF
VREF
VREF from 0V to 95% of final
BAT pin is also the switching regulator
supply input
V = V , I = 10mA
SEN
BAT SVOUT
Low I mode of P
Q
SAVE
V ≥V
/SDC +150mV
BAT SVOUT_MAX
MAX
V = 3.7V, L = 4.7μH
BAT
ISVOUT = 100mA
R = 340kΩ, R = 100kΩ
S1
S2
2.8V ≤ V ≤ 4.5V
BAT
I = 100mA
SVOUT
R = 340kΩ, R = 100kΩ
S1
S2
5mA ≤ I ≤ 150mA
SVOUT
V = 3.7V
BAT
R = 340kΩ, R = 100kΩ
S1
S2
Min
2.55
92
3
0.480
-0.3
Typ
100
0.75
70
0.4
V
BAT
84
115
0.500
2.2
0.002
Max
2.8
60
1
0.520
0.3
Units
μA
V
dB
ms
V
V
V
mV
μA
ns
%
V
V
V
V
%/V
%/mA
5
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