lt3694-1 Linear Technology Corporation, lt3694-1 Datasheet - Page 6

• Manufacturer Part Number: lt3694-1
• Description: Lt3694/lt3694-1 - 36v, 2.6a Monolithic Buck Regulator With Dual Ldo
• Manufacturer: Linear Technology Corporation

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