Datasheet

3
LTC1550L/LTC1551L
f
OSC
Internal Oscillator Frequency 900 kHz
V
OL
REG Output Low Voltage I
REG
= 1mA, V
CC
= 5V ● 0.1 0.8 V
I
REG
REG Sink Current V
REG
= 0.8V, V
CC
= 5V ● 410 mA
V
IH
SHDN Input High Voltage V
CC
= 5V ● 2V
V
IL
SHDN Input Low Voltage V
CC
= 5V ● 0.8 V
I
IN
SHDN Input Current V
SHDN
= V
CC
(All LTC1550L Versions) ● 0.1 1 µA
V
SHDN
= V
CC
(All LTC1551L Versions) ● 520 µA
t
ON
Turn-On Time V
CC
= 5V, I
OUT
= 10mA, –1.5V ≤ V
OUT
≤ 4.1V ● 15ms
(LTC1550L/LTC1551L)
V
CC
= 5V, I
OUT
= 5mA, V
OUT
= –4.5V ● 15ms
(LTC1550L/LTC1551L)
V
CC
= 5V, I
OUT
= 10mA, V
OUT
= –2V ● 15ms
(LTC1550L-2)
V
CC
= 5V, I
OUT
= 10mA, V
OUT
= –2.5V ● 15ms
(LTC1550L-2.5)
V
CC
= 5V, I
OUT
= 10mA, V
OUT
= –4.1V ● 15ms
(LTC1550L-4.1/LTC1551L-4.1)
V
OUT
Output Regulation 2.7V ≤ V
CC
≤ 5.25V, 0 ≤ I
OUT
≤ 5mA ● –1.537 –1.5 –1.463 V
(LTC1550L/LTC1551L) 2.8V ≤ V
CC
≤ 5.25V, 0 ≤ I
OUT
≤ 10mA ● –1.537 –1.5 –1.463 V
3.5V ≤ V
CC
≤ 5.25V, 0 ≤ I
OUT
≤ 20mA ● –1.537 –1.5 –1.463 V
V
OUT
Output Regulation 2.7V ≤ V
CC
≤ 5.25V, 0 ≤ I
OUT
≤ 5mA ● –2.05 –2.0 –1.95 V
(LTC1550L/LTC1550L-2/ 3.1V ≤ V
CC
≤ 5.25V, 0 ≤ I
OUT
≤ 10mA ● –2.05 –2.0 –1.95 V
LTC1551L) 3.75V ≤ V
CC
≤ 5.25V, 0 ≤ I
OUT
≤ 20mA ● –2.05 –2.0 –1.95 V
V
OUT
Output Regulation 3.05V ≤ V
CC
≤ 5.25V, 0 ≤ I
OUT
≤ 5mA ● –2.562 –2.5 –2.438 V
(LTC1550L/LTC1550L-2.5/ 3.45V ≤ V
CC
≤ 5.25V, 0 ≤ I
OUT
≤ 10mA ● –2.562 –2.5 –2.438 V
LTC1551L) 4.1V ≤ V
CC
≤ 5.25V, 0 ≤ I
OUT
≤ 20mA ● –2.562 –2.5 –2.438 V
V
OUT
Output Regulation 3.45V ≤ V
CC
≤ 5.25V, 0 ≤ I
OUT
≤ 5mA ● –3.075 –3.0 –2.925 V
(LTC1550L/LTC1551L) 3.85V ≤ V
CC
≤ 5.25V, 0 ≤ I
OUT
≤ 10mA ● –3.075 –3.0 –2.925 V
4.5V ≤ V
CC
≤ 5.25V, 0 ≤ I
OUT
≤ 20mA ● –3.075 –3.0 –2.925 V
V
OUT
Output Regulation 3.9V ≤ V
CC
≤ 5.25V, 0 ≤ I
OUT
≤ 5mA ● –3.587 –3.5 –3.413 V
(LTC1550L/LTC1551L) 4.2V ≤ V
CC
≤ 5.25V, 0 ≤ I
OUT
≤ 10mA ● –3.587 –3.5 –3.413 V
4.85V ≤ V
CC
≤ 5.25V, 0 ≤ I
OUT
≤ 20mA ● –3.587 –3.5 –3.413 V
V
OUT
Output Regulation 4.5V ≤ V
CC
≤ 5.25V, 0 ≤ I
OUT
≤ 5mA ● –4.203 –4.1 –3.998 V
(LTC1550L/LTC1550L-4.1) 4.75V ≤ V
CC
≤ 5.25V, 0 ≤ I
OUT
≤ 10mA ● –4.203 –4.1 –3.998 V
(LTC1551L/LTC1551L-4.1)
V
OUT
Output Regulation 4.8V ≤ V
CC
≤ 5.25V, 0 ≤ I
OUT
≤ 5mA ● –4.613 –4.5 –4.388 V
(LTC1550L/LTC1551L)) 5.1V ≤ V
CC
≤ 5.25V, 0 ≤ I
OUT
≤ 10mA ● –4.613 –4.5 –4.388 V
I
SC
Output Short-Circuit Current V
OUT
= 0V, V
CC
= 5.25V ● 80 200 mA
V
RIPPLE
Output Ripple Voltage 1mV
The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C.
V
CC
= 2.7V to 5.25V, C1 = C
CP
= 0.1µF, C
OUT
= 10µF, T
A
= 25°C unless otherwise specified. (Note 3)
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: All currents into device pins are positive; all currents out of device
pins are negative. All voltages are referenced to ground unless otherwise
specified. All typicals are given at T
A
= 25°C.
Note 3: The LTC1550LC/LTC1551LC are guaranteed to meet specified
performance from 0°C to 70°C and are designed, characterized and
expected to meet these extended temperature limits, but are not tested at
–40°C and 85°C. The LTC1550LI is guaranteed to meet the extended
temperature limits.