Datasheet
LTC1261L
3
1261lfa
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C, C1 = 0.1µF, C
OUT
= 3.3µF unless otherwise noted. (Notes 2, 4)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
CC
Supply Voltage
LTC1261LCMS8/LTC1261LCS8
LTC1261LCMS8-4/LTC1261LCS8-4
LTC1261LCMS8-4.5/LTC1261LCS8-4.5
(Note 5)
(Note 5)
l
l
l
2.7
4.35
4.75
5.25
5.25
5.25
V
V
V
V
REF
Reference Voltage 1.23 V
I
CC
Supply Current V
CC
= 5.25V, No Load, SHDN Floating
V
CC
= 5.25V, No Load, V
SHDN
= V
CC
l
l
650
5
1500
20
µA
µA
f
OSC
Internal Oscillator Frequency V
CC
= 5V, V
OUT
= –4V 650 kHz
V
OL
REG Output Low Voltage I
REG
= 1mA, V
CC
= 5V, V
OUT
= –4V
l
0.1 0.8 V
I
REG
REG Sink Current V
REG
= 0.8V, V
CC
= 3.3V
V
REG
= 0.8V, V
CC
= 5V
l
l
4
5
8
12
mA
mA
I
ADJ
Adjust Pin Current V
ADJ
= 1.23V
l
±0.01 ±1 µA
V
IH
SHDN Input High Voltage V
CC
= 5V
l
2 V
V
IL
SHDN Input Low Voltage V
CC
= 5V
l
0.8 V
I
IN
SHDN Input Current V
SHDN
= V
CC
l
2.5 25 µA
t
ON
Turn-On Time V
CC
= 5V, I
OUT
= 10mA, –1.5V ≤ V
OUT
≤ –4V (LTC1261L)
V
CC
= 5V, I
OUT
= 5mA, V
OUT
= –4.5V (LTC1261L)
V
CC
= 5V, I
OUT
= 10mA, V
OUT
= –4V (LTC1261L-4)
V
CC
= 5V, I
OUT
= 5mA, V
OUT
= –4.5V (LTC1261L-4.5)
l
l
l
l
250
250
250
250
1500
1500
1500
1500
µs
µs
µs
µs
V
OUT
Output Regulation (LTC1261L) 2.70V ≤ V
CC
≤ 5.25V, 0mA ≤ I
OUT
≤ 10mA
3.25V ≤ V
CC
≤ 5.25V, 0mA ≤ I
OUT
≤ 20mA
l
l
–1.552
–1.552
–1.5
–1.5
–1.448
–1.448
V
V
2.70V ≤ V
CC
≤ 5.25V, 0mA ≤ I
OUT
≤ 5mA
2.95V ≤ V
CC
≤ 5.25V, 0mA ≤ I
OUT
≤ 10mA
3.50V ≤ V
CC
≤ 5.25V, 0mA ≤ I
OUT
≤ 20mA
l
l
l
–2.070
–2.070
–2.070
–2.0
–2.0
–2.0
–1.930
–1.930
–1.91
V
V
V
2.95V ≤ V
CC
≤ 5.25V, 0mA ≤ I
OUT
≤ 5mA
3.30V ≤ V
CC
≤ 5.25V, 0mA ≤ I
OUT
≤ 10mA
3.85V ≤ V
CC
≤ 5.25V, 0mA ≤ I
OUT
≤ 20mA
l
l
l
–2.587
–2.587
–2.587
–2.5
–2.5
–2.5
–2.413
–2.413
–2.41
V
V
V
3.40V ≤ V
CC
≤ 5.25V, 0mA ≤ I
OUT
≤ 5mA
3.70V ≤ V
CC
≤ 5.25V, 0mA ≤ I
OUT
≤ 10mA
4.25V ≤ V
CC
≤ 5.25V, 0mA ≤ I
OUT
≤ 20mA
l
l
l
–3.105
–3.105
–3.105
–3.0
–3.0
–3.0
–2.895
–2.895
–2.885
V
V
V
3.85V ≤ V
CC
≤ 5.25V, 0mA ≤ I
OUT
≤ 5mA
4.10V ≤ V
CC
≤ 5.25V, 0mA ≤ I
OUT
≤ 10mA
4.60V ≤ V
CC
≤ 5.25V, 0mA ≤ I
OUT
≤ 20mA
l
l
l
–3.622
–3.622
–3.622
–3.5
–3.5
–3.5
–3.378
–3.378
–3.365
V
V
V
Output Regulation
(LTC1261L/LTC1261L-4)
4.35V ≤ V
CC
≤ 5.25V, 0mA ≤ I
OUT
≤ 5mA
4.60V ≤ V
CC
≤ 5.25V, 0mA ≤ I
OUT
≤ 10mA
5.10V ≤ V
CC
≤ 5.25V, 0mA ≤ I
OUT
≤ 20mA
l
l
l
–4.140
–4.140
–4.140
–4.0
–4.0
–4.0
–3.860
–3.860
–3.83
V
V
V
Output Regulation
(LTC1261L/LTC1261L-4.5)
4.75V ≤ V
CC
≤ 5.25V, 0mA ≤ I
OUT
≤ 5mA
5.05V ≤ V
CC
≤ 5.25V, 0mA ≤ I
OUT
≤ 10mA
l
l
–4.657
–4.657
–4.5
–4.5
–4.343
–4.343
V
V
I
SC
Output Short-Circuit Current V
OUT
= 0V, V
CC
= 5.25V
l
100 220 mA
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
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.
Note 3: The output should never be set to exceed V
CC
– 10.8V.
Note 4: The LTC1261LC is guaranteed to meet specifications from 0°C
to 70°C and is designed, characterized and expected to meet industrial
temperature limits, but is not tested at –40°C and 85°C. The LTC1261LI
is guaranteed to meet specifications from –40°C and 85°C.
Note 5: The LTC1261L-4 and LTC1261L-4.5 will operate with less than the
minimum V
CC
specified in the electrical characteristics table, but they are
not guaranteed to meet the ±4.5% V
OUT
specification.