Datasheet
LT6656
7
6656fc
For more information www.linear.com/LT6656
TYPICAL PERFORMANCE CHARACTERISTICS
Power Supply Rejection Ratio
vs Frequency
Dropout Voltage vs Load Current
Load Regulation (Sourcing) Load Regulation (Sinking)
Line Regulation
Supply Current vs Input Voltage
100
10
1
0.1
INPUT VOLTAGE (V)
0
SUPPLY CURRENT (µA)
10 186 14
6656 G03
20
8 164 122
T
A
= 125°C
T
A
= 85°C
T
A
= 25°C
T
A
= –55°C
2.048V TO 5V OPTIONS
2.5V OPTION SHOWN
V
ON
MOVES WITH VOLTAGE OPTION
V
ON
0.1µ 1µ 1m
10m
100µ10µ
1000
100
10
1
LOAD CURRENT (A)
DROPOUT VOLTAGE (mV)
6656 G04
T
A
= 125°C
T
A
= 85°C
T
A
= 25°C
T
A
= –55°C
2.048V TO 5V OPTIONS
V
IN
– V
OUT
INITIAL V
IN
= V
OUT
+ 0.5V
∆V
OUT
= 0.1%
750
500
250
0
–750
–500
–250
OUTPUT VOLTAGE CHANGE (ppm)
6656 G05
T
A
= 125°C
T
A
= 85°C
T
A
= 25°C
T
A
= –55°C
2.048V TO 5V OPTIONS
V
IN
= V
OUT
+ 0.5V
C
L
= 1µF
0.1µ 1µ 1m
10m
100µ10µ
LOAD CURRENT (A)
10µ
1m
100µ
5.0
2.0
1.5
3.0
2.5
4.0
3.5
4.5
1.0
0.5
0
–0.5
LOAD CURRENT (A)
OUTPUT VOLTAGE CHANGE (%)
6656 G06
T
A
= 85°C, 125°C
T
A
= 25°C
T
A
= –40°C
T
A
= –55°C
ALL OPTIONS
V
IN
= V
OUT
+ 0.5V
C
L
= 1µF
1000
900
800
700
600
500
400
300
200
100
0
–200
–100
INPUT VOLTAGE (V)
0
OUTPUT VOLTAGE CHANGE (ppm)
10 186 14
6656 G08
20
8 164 122
T
A
= 125°C
T
A
= 85°C
T
A
= 25°C
T
A
= –55°C
ALL OPTIONS
I
L
= 0
C
L
= 1µF
2.5V OPTION SHOWN
V
ON
MOVES WITH
VOLTAGE OPTION
V
ON
FREQUENCY (Hz)
POWER SUPPLY REJECTION RATIO (dB)
6656 G09
90
80
70
60
50
40
30
10
20
0
10 1k
10k
100
V
IN
= V
OUT
+ 0.5V
C
L
= 1µF
I
L
= 0
1.25V OPTION
2.5V OPTION
5V OPTION
Minimum Supply Voltage
vs Load Current
2.0
1.8
1.6
1.4
1.2
0.8
1.0
MINIMUM SUPPLY VOLTAGE (V)
6656 G18
1.25V OPTION
INITIAL V
IN
= 2.2V
∆V
OUT
= 0.1%
T
A
= 125°C
T
A
= 85°C
T
A
= 25°C
T
A
= –40°C
T
A
= –55°C
0.1µ 1µ 1m
10m
100µ10µ
LOAD CURRENT (A)
Load Regulation (Sourcing)
500
250
0
–1000
–750
–500
–250
OUTPUT VOLTAGE CHANGE (ppm)
6656 G19
T
A
= 125°C
T
A
= 85°C
T
A
= 25°C
T
A
= –40°C
T
A
= –55°C
1.25V OPTION
V
IN
= 1.75V
C
L
= 1µF
0.1µ 1µ 1m
10m
100µ10µ
LOAD CURRENT (A)
Power Supply Rejection Ratio
vs Frequency
FREQUENCY (Hz)
POWER SUPPLY REJECTION RATIO (dB)
6656 G20
90
80
70
60
50
40
30
10
20
–10
0
10 1k
10k
100
2.5V OPTION
V
IN
= 3V
I
L
= 0, C
L
= 1µF
I
L
= 0, C
L
= 10µF
I
L
= 1mA, C
L
= 1µF
I
L
= 1mA, C
L
= 10µF