Datasheet
LT6656
5
6656fc
For more information www.linear.com/LT6656
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the specified
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= V
OUT
+ 0.5V (for LT6656-1.25, V
IN
= 2.2V), C
L
= 1μF, I
L
= 0,unless
otherwise noted.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Output Voltage Error LT6656ACS6, LT6656AIS6, LT6656AILS8
LT6656BCS6, LT6656BIS6, LT6656BILS8
LT6656ACDC, LT6656AIDC
LT6656BCDC, LT6656BIDC
–0.05
–0.1
–0.1
–0.2
0.05
0.1
0.1
0.2
%
%
%
%
Output Voltage T
emperature Coefficient (Note 5) LT6656A
LT6656B
l
l
5
12
10
20
ppm/°C
ppm/°C
Line Regulation V
IN
= (V
OUT
+ 0.5V) to 18V
LT6656-2.048, LT6656-2.5, LT6656-3,
LT6656-3.3, L
T6656-4.096, LT6656-5
l
2 25
40
ppm/V
ppm/V
V
IN
= 2.2V to 18V
LT6656-1.25
l
2 25
40
ppm/V
ppm/V
Load Regulation (Note 6) I
L
= 5mA, Sourcing
LT6656-2.048, LT6656-2.5, LT6656-3,
LT6656-3.3, L
T6656-4.096, LT6656-5
l
65 150
375
ppm/mA
ppm/mA
I
L
= 5mA, Sourcing
LT6656S6-1.25, LT6656DC-1.25
l
80 175
425
ppm/mA
ppm/mA
I
L
= 5mA, Sourcing
LT6656LS8-1.25
l
135 250
500
ppm/mA
ppm/mA
Dropout Voltage (Note 7) V
IN
– V
OUT
, ∆V
OUT
Error ≤ 0.1%
I
L
= 0
LT6656-2.048, LT6656-2.5, LT6656-3,
LT6656-3.3, L
T6656-4.096, LT6656-5
l
3
10
40
mV
mV
I
L
= 5mA, Sourcing
LT6656-2.048, LT6656-2.5, LT6656-3,
LT6656-3.3, L
T6656-4.096, LT6656-5
l
250 370
500
mV
mV
Minimum Input Voltage I
L
= 0, ∆V
OUT
Error ≤ 0.1%
LT6656-1.25
0°C ≤ T
A
≤ 70°C
–40°C ≤ T
A
≤ 85°C
l
l
1.35
1.5
1.6
1.8
V
V
V
Supply Current
l
0.85 1.0
1.5
µA
µA
Output Short Circuit Current Short V
OUT
to GND
Short V
OUT
to V
IN
18
4
mA
mA
Input Reverse Leakage Current V
IN
= –18V, V
OUT
= GND 80 µA
Reverse Output Current V
IN
= GND, V
OUT
= 18V 30 µA
Output Voltage Noise (Note 8) 0.1Hz to 10Hz
10Hz to 1kHz, LT6656-1.25
10Hz to 1kHz, LT6656-2.5
10Hz to 1kHz, LT6656-5
30
50
80
140
ppm
P-P
µV
RMS
µV
RMS
µV
RMS
Turn-On Time LT6656-1.25, 0.1% Settling
LT6656-2.5, 0.1% Settling
LT6656-5, 0.1% Settling
15
30
60
ms
ms
ms
Long Term Drift of Output V
oltage (Note 9) LT6656S6, LT6656DC
LT6656LS8
50
15
ppm/√kHr
ppm/√
kHr
Hysteresis (Note 10) LT6656S6, LT6656DC
∆T = 0°C to 70°C
∆T = –40°C to 85°C
25
70
ppm
ppm
LT6656LS8
∆T = 0°C to 70°C
∆T = –40°C to 85°C
15
55
ppm
ppm