Datasheet

5
LTC3776
3776fa
Regulated Feedback Voltage
(CH2) vs Temperature
Regulated Feedback Voltage
(CH1) vs Temperature
Shutdown (RUN) Threshold
vs Temperature
RUN/SS Pull-Up Current
vs Temperature
Maximum Current Sense Threshold
(CH1) vs Temperature
Oscillator Frequency
vs Temperature
TEMPERATURE (°C)
–60
–10
NROMALIZED FREQUENCY (%)
–8
–4
–2
0
10
4
–20
20
40
3736 G15
–6
6
8
2
–40 0
60
80
100
TEMPERATURE (°C)
–60
INPUT (V
IN
) VOLTAGE (V)
2.30
2.40
100
3736 G16
2.20
2.10
–20
20
60
–40
0
40
80
2.50
2.25
2.35
2.15
2.45
V
IN
RISING
V
IN
FALLING
Undervoltage Lockout Threshold
vs Temperature
TYPICAL PERFOR A CE CHARACTERISTICS
UW
T
A
= 25°C unless otherwise noted.
Maximum Current Sense Voltage
vs I
TH2
Pin Voltage (CH2)
I
TH2
VOLTAGE (V)
0
–100
CURRENT LIMIT (%)
–80
–40
–20
0
100
40
1.5
3776 G08
–60
60
80
20
1.0
2.0
TEMPERATURE (°C)
–60
FEEDBACK VOLTAGE (V
FB2
) (V)
1.2625
1.2600
1.2575
1.2550
1.2525
1.2500
1.2475
1.2450
1.2425
1.2400
1.2375
–20
20
40
3776 G09
–40 0
60
80
100
V
REF
= 2.500V
TEMPERATURE (°C)
–60
0.588
FEEDBACK VOLTAGE (V
FB1
) (V)
0.592
0.596
0.600
0.604
–20 20
60
100
3776 G10
0.608
0.612
–40 0
40
80
TEMPERATURE (°C)
–60
0
RUN/SS VOLTAGE (V)
0.1
0.3
0.4
0.5
1.0
0.7
–20
20
40
3736 G11
0.2
0.8
0.9
0.6
–40 0
60
80
100
TEMPERATURE (°C)
–60
0.4
RUN/SS PULL-UP CURRENT (μA)
0.5
0.6
0.7
0.8
–20 20
60
100
3736 G12
0.9
1.0
–40 0
40
80
TEMPERATURE (°C)
–60
115
MAXIMUM CURRENT SENSE THRESHOLD (mV)
120
125
130
135
–40 –20 0 20
3736 G13
40 60 80 100
I
PRG1
= FLOAT
Maximum Current Sense
Threshold (CH2) vs Temperature
TEMPERATURE (°C)
–60
MAXIMUM CURRENT SENSE THRESHOLD (mV)
140
145
150
0 40 100
3776 G14
135
130
125
–40 –20
20
60 80
I
PRG2
= FLOAT