LT3694/LT3694-1
TYPICAL PERFORMANCE CHARACTERISTICS
I
TRK/SS
vs Temperature
4.0
V
IN
= 12V, T
A
= 25°C, unless otherwise noted.
Minimum Input Voltage
vs Load Current (V
IN
to Start)
V
OUT
= 5V
f
SW
= 800kHz
TO START
INPUT VOLTAGE (V)
6.0
5.5
5.0
4.5
4.0
0.001
TO RUN
EN/UVLO Thresholds
vs Temperature
1.4
1.2
EN/UVLO THRESHOLD (V)
UVLO SWITCHING THRESHOLD
7.0
6.5
TRK/SS CURRENT (µA)
3.5
1.0
0.8
0.6
0.4
0.2
BIAS CURRENT
SHUTDOWN THRESHOLD
3.0
2.5
2.0
–50
0
100
50
TEMPERATURE (°C)
150
36941 G10
0
–50
0
100
50
TEMPERATURE (°C)
150
36941 G11
0.01
0.1
LOAD CURRENT (A)
1
36941 G12
LDO Current Limit vs Temperature
5
NORMALIZED CURRENT LIMIT (%)
4
CURRENT LIMIT VOLTAGE (mV)
60
50
40
30
20
10
0
LDO Current Limit
vs V
FB
(Foldback)
+150°C
–40°C
LDO Minimum V
IN
to DRV Voltage
vs DRV Current
2.5
2
1
0
–1
–2
–3
–4
–5
–50
0
100
50
TEMPERATURE (°C)
150
36941 G13
V
IN
TO DRV VOLTAGE (V)
0
0.4
0.6
0.2
FEEDBACK VOLTAGE (V)
0.8
36941 G14
3
2.0
1.5
1.0
0.5
0
0
2
4
6
DRV CURRENT (mA)
8
10
36941 G15
LDO Minimum BIAS to DRV
Voltage vs DRV Current
0.5
V
IN
= 5V
V
BIAS
= 4.4V
10Hz to 100kHz LDO Output Noise
V
OUT
= 2.5V
I
OUT
= 0.25A
ZXTCM322
PASS XSTR
BIAS TO DRV VOLTAGE (V)
0.4
0.3
10mV/DIV
0.2
0.1
0
0
2
4
6
DRV CURRENT (mA)
8
10
36941 G16
1ms/DIV
36941 G17
36941fb
6
LINER [ LINEAR TECHNOLOGY ]
