Datasheet

LTC3876
9
3876f
TYPICAL PERFORMANCE CHARACTERISTICS
RUN Pin Thresholds
vs Temperature
RUN Pull-Up Currents
vs Temperature
TRACK/SS Pull-Up Current
vs Temperature
INTV
CC
Undervoltage Lockout
Thresholds vs Temperature
Shutdown Current into V
IN
Pin
vs Voltage on V
IN
Pin
Quiescent Current Into V
IN
Pin
vs Temperature with EXTV
CC
= 0V
Error Amplifier Transconductance
vs Temperature
VDDQ Current Sense Voltage
vs ITH Voltage
VTT Current Sense Voltage
vs ITH Voltage
TEMPERATURE (°C)
–50
TRANSCONDUCTANCE (mS)
1.70
1.65
1.55
1.75
1.80
25 75 150
3876 G28
1.60
1.50
–25 0
50
100 125
VDDQ CH2
VTT CH2
TEMPERATURE (°C)
–50
RUN PIN THRESHOLDS (V)
1.2
1.0
0.6
0.4
0.2
1.4
1.6
25 75 150
3876 G31
0.8
0
–25 0
50
100 125
SWITCHING REGION
STAND-BY REGION
SHUTDOWN REGION
TEMPERATURE (°C)
–50
CURRENT (µA)
12
10
2
14
16
25 75 150
3876 G32
8
6
4
0
–25 0
50
100 125
RUN PIN ABOVE SWITCHING
THRESHOLD
RUN PIN BELOW SWITCHING
THRESHOLD
TEMPERATURE (°C)
–50
CURRENT (µA)
1.10
1.05
0.85
1.15
1.20
25 75 150
3876 G33
1.00
0.95
0.90
0.80
–25 0
50
100 125
TEMPERATURE (°C)
–50
UVLO THRESHOLD (V)
4.1
3.5
4.3
4.5
25 75 150
3876 G34
3.9
3.7
3.3
–25 0
50
100 125
UVLO RELEASE
(INTV
CC
RISING)
UVLO LOCK
(INTV
CC
FALLING)
V
IN
(V)
0
CURRENT (µA)
35
20
15
10
5
40
15 25 40
3876 G35
30
25
0
510
20
30 35
130°C
25°C
–45°C
TEMPERATURE (°C)
–50
QUIESCENT CURRENT (mA)
3.1
3.7
3.6
3.5
3.4
3.3
3.2
3.8
25 75 150
3876 G36
3.0
–25 0
50
100 125
ITH VOLTAGE (V)
0
CURRENT SENSE VOLTAGE (mV)
80
60
20
100
120
1.2 2
3876 G29
40
0
–20
–40
–60
0.4 0.8
1.6
2.4
V
RNG
= 2V
V
RNG
= 1V
V
RNG
= 0.6V
ITH VOLTAGE (V)
0
CURRENT SENSE VOLTAGE (mV)
0
–60
–90
90
60
30
120
1.2 2.4
3876 G30
–30
–120
0.4 0.8
1.6
2
V
RNG
= 2V
V
RNG
= 1V
V
RNG
= 0.6V