sc643 Semtech Corporation, sc643 Datasheet - Page 4

• Manufacturer Part Number: sc643
• Description: Light Management Unit With 4 Ldos And Sempulse Interface
• Manufacturer: Semtech Corporation

Electrical Characteristics (continued)
Parameter
Charge Pump Electrical Specifi cations (Cont.)
1.5x Mode to 2x Mode
Falling Transition Voltage
2x Mode to 1.5x Mode Hysteresis
Current Sink Off -State
Leakage Current
Pump Frequency
LDO Electrical Specifi cations
LDO1, LDO3, and LDO4
Voltage Setting Range
LDO2 Voltage Setting Range
Output Voltage Accuracy
Dropout Voltage
Current Limit
Line Regulation
Load Regulation
Power Supply Rejection Ratio
Output Voltage Noise
Minimum LDO Capacitor
(7)
Symbol
V
C
I
V
V
ΔV
PSRR
e
BL/FL(OFF)
PSRR
e
ΔV
ΔV
TRANS1.5x
V
f
LDO(MIN)
HYST1.5x
LDOm
n-LDOm
V
n-LDO2
V
PUMP
I
LDO2
LIM
Dm
LOAD
D2
LDO
LINE
(6)
m
2
1.5V < V
1.2V < V
I
I
I
I
LDOm
I
I
LDO
LDO2
LDO
OUT
OUT
I
= 1mA to 100mA, 2.9V ≤ V
10Hz < f < 100kHz, C
10Hz < f < 100kHz, C
= 1mA, T
= 50mA, I
= 50mA, I
LDOm
I
V
= 50mA, with 0.5V
V
= 50mA, with 0.5V
LDO2
IN
Range of nominal settings
Range of nominal settings
IN
C
C
LDOm
= 2.9V to 4.2V, V
LDO2
LDOm
Nominal value for C
= 2.9V to 4.2V, V
LDO2
I
I
= 150mA, V
= 100mA, V
LDOm
LDO2
1.5V < V
1.2V < V
< 1.8V, f < 1kHz, C
V
< 3.0V, f < 1kHz, C
= 1μF, I
= 1μF, I
Conditions
IN
A
= 1mA to 100mA
V
I
= 1mA to 100mA
I
V
BLn
BLn
LDOm
LDO2
= 25°C, 2.9V ≤ V
V
LDOm
= V
LDO2
IN
= 10mA, V
= 10mA, V
= 3.2V
= 1mA,
BLn
LDOm
= 1mA,
LDO2
= 1.8V,
= 3.3V,
LDOm
LDO2
IN
IN
= 4.2V
= V
< 1.8V
= V
< 3.0V
P-P
= 50 mA,
P-P
= 50 mA,
LDOm
LDO2
BYP
BYP
LDOm
supply ripple
LDO2
supply ripple
OUT
OUT
= 22nF,
= 22nF,
LDOn
= 1.8V
= 2.8V
BYP
+ V
+ V
BYP
IN
= 4.2V
= 4.2V
IN
≤ 4.2V
= 22nF,
≤ 4.2V
= 22nF,
D2
Dm
(5)
(5)
Min
-3.5
200
1.5
1.2
-3
1
±1.0
Typ
2.91
520
250
150
100
0.1
2.1
1.3
50
60
75
50
Max
+3.5
200
150
3.3
1.8
7.2
4.8
+3
25
20
1
SC643
Units
μV
kHz
mA
mV
mV
mV
mV
μA
dB
μF
%
%
V
V
V
RMS
4
4