Datasheet

LTC3026
5
3026ff
ADJ Voltage vs Temperature IN Shutdown Current BST Voltage vs Temperature
Typical perForMance characTerisTics
Dropout Voltage vs Input Voltage Ripple Rejection Ripple Rejection
Shutdown Threshold Output Current Limit BST to OUT Headroom Voltage
3026 G04
TEMPERATURE (°C)
–50 –25
404
403
402
401
400
399
398
397
396
75
1000 5025 125
ADJUST VOLTAGE (mV)
1mA
1.5A
V
BST
= 5V
V
IN
= 1.5V
V
OUT
=1.2V
3026 G05
–50 –25 75
1000 5025 125
TEMPERATURE (°C)
INPUT CURRENT (µA)
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
1.2V
2.5V
3.5V
3026 G06
–50 –25 75
1000 5025 125
TEMPERATURE (°C)
5.050
5.025
5.000
4.975
4.950
BST VOLTAGE (V)
V
IN
= 1.5V
3026 G07
V
IN
(V)
1.2
200
180
160
140
120
100
80
60
40
20
0
2.2
1.4 1.6 1.8 2.42.0 2.6
DROPOUT (mV)
–40°C
25°C
85°C
125°C
V
FB
= 0.38V
I
OUT
=1.5A
3026 G08
V
IN
(V)
1.2
RIPPLE REJECTION (dB)
60
50
40
30
20
10
0
1.8 2.2
1.4 1.6
2.0 2.4 2.6
1MHz
100kHz
10kHz
V
BST
= 5V
V
OUT
=1.2V
I
OUT
= 800mA
C
OUT
= 10µF
3026 G09
FREQUENCY (Hz)
100
70
60
50
40
30
20
10
0
100000
1000 10000 1000000 1E+07
RIPPLE REJECTION (dB)
V
BST
= 5V
V
IN
= 1.5V
V
OUT
=1.2V
I
OUT
= 800mA
C
OUT
= 10µF
3026 G10
V
IN
(V)
1
V
SHDN
THRESHOLD (mV)
1200
900
600
300
2 3 4 5
6
–40°C
25°C
125°C
RISE
RISE
RISE
FALL
FALL
FALL
3026 G11
V
IN
(V)
1.0
I
OUT
(A)
2.5
3.5
1.5 2.0 3.0
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
CURRENT LIMIT
THERMAL LIMIT
V
OUT
= 0V
T
A
= 25°C
3026 G12
TEMPERATURE (°C)
–50
V
BST
– V
OUT
(V)
2.22
2.20
2.18
2.16
2.14
2.12
2.10
2.08
2.06
2.04
2.02
0
50
75
–25
25
100
125