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