LTC3850-1_15 Datasheet, PDF (8/38 Pages) Linear Technology – Dual, 2-Phase Synchronous Step-Down Switching Controller

LTC3850/LTC3850-1
TYPICAL PERFORMANCE CHARACTERISTICS
Shutdown (RUN) Threshold
vs Temperature
1.5
1.4
1.3
ON
1.2
OFF
1.1
1.0
–50 –25
0 25 50
TEMPERATURE (°C)
75 100
38501 G18
Undervoltage Lockout Threshold
(INTV_CC) vs Temperature
5
Regulated Feedback Voltage
vs Temperature
806
804
802
800
798
796
794
–50 –25
0 25 50
TEMPERATURE (°C)
75 100
38501 G19
Oscillator Frequency
vs Input Voltage
420
Oscillator Frequency
vs Temperature
900
800
V_FREQ = INTV_CC
700
600
500
V_FREQ = 1.2V
400
300
200
–50 –25
V_FREQ = 0V
0 25 50
TEMPERATURE (°C)
75 100
38501 G20
Shutdown Current
vs Input Voltage
50
4
40
RISING
410
3
30
FALLING
400
2
20
390
1
10
0
–50 –25
0 25 50
TEMPERATURE (°C)
75 100
38501 G21
Shutdown Current
vs Temperature
50
V_IN = 15V
40
380
5
10
15
20
INPUT VOLTAGE (V)
25
38501 G22
0
5
10
15
20
25
INPUT VOLTAGE (V)
38501 G23
Quiescent Current
vs Temperature without EXTV_CC
5
4
30
3
20
2
10
1
8
0
–50 –25
0 25 50
TEMPERATURE (°C)
75 100
38501 G24
0
–50 –25
0 25 50
TEMPERATURE (°C)
75 100
38501 G25
38501fc