lt3692a Linear Technology Corporation, lt3692a Datasheet - Page 5

• Manufacturer Part Number: lt3692a
• Description: Monolithic Dual Tracking 3.5a Step-down Switching Regulator
• Manufacturer: Linear Technology Corporation

TYPICAL PERFORMANCE CHARACTERISTICS
820
815
810
805
800
3.5
3.0
2.0
1.5
1.0
2.5
0.5
0
–50
–50
Shutdown Threshold and Minimum
Input Voltage vs Temperature
FB Voltage and CH1-CH2 FB
Offset vs Temperature
–25
–25
0
0
THRESHOLD VOLTAGE
TEMPERATURE (°C)
TEMPERATURE (°C)
INPUT VOLTAGE
25
OFFSET
25
SHUTDOWN
MINIMUM
CH2
CH1
–1
–2
–3
–4
50
50
4
3
2
1
0
–50
Soft-Start-to-Feedback Offset
vs Temperature
V
SS
75
75
–25
= 0.4V
100
100 125
0
TEMPERATURE (°C)
125 150
3692a G01
3692a G04
25
150
50
8
6
4
2
0
–2
–4
–6
–8
75
100
–0.25
–0.50
41.0
40.5
40.0
39.5
39.0
38.5
38.0
37.5
37.0
36.5
36.0
1.50
1.25
1.00
0.75
0.50
0.25
0
–50
–50
125
V
vs Temperature
T
3692a G07
R
IN
J
TO GND
TJ
Output Voltage vs Temperature
–25
–25
150
Overvoltage Threshold
= 30k
R
TJ
0
0
= 30k TO –1V
TEMPERATURE (°C)
TEMPERATURE (°C)
25
25
50
50
75
75
100
100
750
740
730
720
710
700
690
680
670
650
660
–50
125
125
Comparator Thresholds
vs Temperature
3692a G02
3692a G05
–25
150
150
0
TEMPERATURE (°C)
25
THRESHOLD
THRESHOLD
425
420
415
410
405
400
395
390
385
380
375
370
10
FALLING
RISING
5
4
9
8
7
6
2
1
0
3
–50
–50
50
Shutdown Quiescent Current
vs Temperature
Error Amplifier Transconductance
vs Temperature
–30 –10
–25
75
100 125 150
0
10
TEMPERATURE (°C)
TEMPERATURE (°C)
25
30
3692a G08
I
I
Q1
Q2
50
50 70 90
LT3692A
75
100
110
125
130
3692a G03
3692a G06
3692af
5
150
150