Datasheet

LT3690
7
3690fa
Typical perForMance characTerisTics
V
C
Voltages vs Temperature Frequency Foldback vs V
FB
Feedback Voltage vs Temperature
Power Good Threshold
vs Temperature
Error Amp Output Current vs V
FB
EN Pin Current vs V
EN
UVLO Threshold Voltage
vs Temperature
UVLO Pin Current vs Temperature
(V
UVLO
= 1.33V)
T
A
= 25°C, unless otherwise noted.
EN Threshold Voltage
vs Temperature
EN PIN VOLTAGE (V)
0
EN PIN CURRENT (µA)
10
2
0
4
6
8
5 30252010 15
3690 G17
35
TEMPERATURE (°C)
EN THRESHOLD VOLTAGE (V)
2.5
0.5
0
1.0
1.5
2.0
3690 G18
–50 50 1000 7525–25 150125
TEMPERATURE (°C)
UVLO THRESHOLD VOLTAGE (V)
2.5
0.5
0
1.0
1.5
2.0
3690 G19
–50 50 1000 7525–25 150125
TEMPERATURE (°C)
UVLO PIN CURRENT (µA)
–1.2
–2.4
–2.8
–2.6
–2.2
–2.0
–1.8
–1.4
–1.6
3690 G20
–50 50 1000 7525–25 150125
TEMPERATURE (°C)
FB PIN VOLTAGE (V)
0.82
0.79
0.78
0.80
0.81
3690 G21
–50 50 1000 7525–25 150125
–50 50 1000 7525–25 150125
TEMPERATURE (°C)
PG THRESHOLD (%)
95
80
75
85
90
3690 G22
FB PIN VOLTAGE (V)
0.6
V
C
PIN CURRENT (µA)
60
0
–60
20
40
–40
–20
0.90.80.7
3690 G23
1.0 –50 50 1000 7525–25 150125
TEMPERATURE (°C)
V
C
PIN VOLTAGE (V)
2.5
0.5
0
1.0
1.5
2.0
3690 G24
CURRENT LIMIT CLAMP
SWITCHING THRESHOLD
FB PIN VOLTAGE (V)
0
FREQUENCY (kHz)
800
200
100
400
300
0
500
600
700
0.1 0.70.60.4 0.50.2 0.3
3690 G25
0.8
R
T
= 32.4k