c644ultrt Semtech Corporation, c644ultrt Datasheet - Page 4

• Manufacturer Part Number: c644ultrt
• Description: Light Management Unit With 4 Ldos And Sempulse Interface
• Manufacturer: Semtech Corporation

Electrical Characteristics (continued)
Parameter
Charge Pump Electrical Specifications (Cont.)
.5x Mode to 2x Mode
Falling Transition Voltage
2x Mode to .5x Mode Hysteresis
Current Sink Off-State
Leakage Current
Pump Frequency
LDO Electrical Specifications
LDO, 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
(6)(7)
(8)
Symbol
V
C
I
V
V
DV
PSRR
e
BL/FL(OFF)
PSRR
e
∆V
DV
TRANS.5x
V
f
LDO(MIN)
HYST.5x
LDOm
n-LDOm
V
n-LDO2
PUMP
I
LDO2
LIM
Dm
LOAD
LDO
LINE
(6)
m
2
.5V < V
.2V < V
I
I
I
I
LDOm
I
I
LDO
LDO2
LDO
OUT
OUT
I
= mA to 00mA, 2.9V ≤ V
0Hz < f < 00kHz, C
0Hz < f < 00kHz, C
= mA, T
= 50mA, I
= 50mA, I
LDOm
V
= 50mA, with 0.5V
V
= 50mA, with 0.5V
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
= 50mA, V
LDOm
LDO2
.5V < V
.2V < V
< .8V, f < kHz, C
V
< 3.0V, f < kHz, C
= µF, I
= µF, I
Conditions
IN
A
= mA to 00mA
V
I
= mA to 00mA
I
V
BLn
BLn
LDOm
LDO2
= 25°C, 2.9V ≤ V
V
LDOm
= V
LDO2
IN
= 0mA, V
= 0mA, V
= 3.2V
= mA,
BLn
LDOm
= mA,
LDO2
= .8V,
= 3.3V,
LDOm
LDO2
IN
= 4.2V
= V
< .8V
< 3.0V
P-P
= 50 mA,
P-P
= 50 mA,
LDOm
LDO2
BYP
BYP
LDOm
supply ripple
supply ripple
OUT
OUT
= 22nF,
= 22nF,
LDOn
= .8V
= 2.8V
BYP
+ V
BYP
IN
= 4.2V
= 4.2V
IN
≤ 4.2V
= 22nF,
≤ 4.2V
= 22nF,
Dm
(5)
(5)
Min
-3.5
200
.5
.2
-3

±.0
Typ
2.9
520
250
50
0.
2.
.3
50
60
75
50
Max
+3.5
200
3.3
.8
7.2
4.8
+3
25
20

Units
µV
kHz
mA
mV
mV
mV
mV
µA
dB
µF
%
%
V
V
V
RMS
4
4