LTC3890-3 Datasheet, PDF (7/40 Pages) Linear Technology – 60V Low IQ, Dual, 2-Phase Synchronous Step-Down DC/DC Controller

Typical Performance Characteristics
LTC3890-3
TRACK/SS Pull-Up Current
vs Temperature
1.10
1.05
1.00
0.95
0.90
–75 –50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
38903 G19
SENSE^– Pin Total Input Bias Current
vs Temperature
800
700
V_OUT > INTV_CC + 0.5V
600
500
400
300
200
100
V_OUT < INTV_CC – 0.5V
0
–100
–75 –50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
38903 G22
Undervoltage Lockout Threshold
vs Temperature
4.2
4.1
4.0
RISING
3.9
FALLING
3.8
3.7
3.6
–75 –50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
38903 G25
Shutdown (RUN) Threshold
vs Temperature
1.40
1.35
1.30
RUN1 RISING
RUN2 RISING
1.25
1.20
1.15
RUN1 FALLING
1.10
RUN2 FALLING
1.05
1.00
–75 –50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
38903 G20
Shutdown Current
vs Input Voltage
30
25
20
15
10
5
0
5 10 15 20 25 30 35 40 45 50 55 60 65
INPUT VOLTAGE (V)
38903 G23
Oscillator Frequency
vs Input Voltage
356
FREQ = GND
354
352
350
348
346
344
5 10 15 20 25 30 35 40 45 50 55 60 65
INPUT VOLTAGE (V)
38903 G26
For more information www.linear.com/3890-3
Regulated Feedback Voltage
vs Temperature
808
806
804
802
800
798
796
794
792
–75 –50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
38903 G21
Oscillator Frequency
vs Temperature
600
550
FREQ = INTV_CC
500
450
400
FREQ = GND
350
300
–75 –50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
38903 G24
Shutdown Current vs Temperature
22
V_IN = 12V
20
18
16
14
12
10
8
–75 –50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
38903 G27
38903f
7