LTC3875_15 Datasheet, PDF (7/44 Pages) Linear Technology – Dual, 2-Phase, Synchronous Controller with Low Value DCR Sensing and Temperature Compensation

Typical Performance Characteristics
LTC3875
Undervoltage Lockout Threshold
(INTV_CC) vs Temperature
5.0
4.8
4.6
RISING
4.4
4.2
4.0
FALLING
3.8
3.6
3.4
3.2
3.0
–50
0
50
100
150
TEMPERATURE (°C)
3875 G18
Shutdown Current vs Temperature
50
45
40
35
30
25
20
15
10
–50 –30 –10 10 30 50 70 90 110 130
TEMPERATURE (°C)
3875 G21
Oscillator Frequency
vs Input Voltage
900
800
V_FREQ = INTV_CC
700
600
V_FREQ = 1.22V
500
400
300
V_FREQ = GND
200
100
0
0
10
20
30
INPUT VOLTAGE (V)
40
3875 G19
Shutdown Current
vs Input Voltage
50
45
40
35
30
25
20
15
10
5
0
0 5 10 15 20 25 30
INPUT VOLTAGE (V)
35 40
3875 G20
Quiescent Current vs Input
Voltage without EXTV_CC
8
7
6
5
Very Low Output Voltage Ripple
V_OUT
TYPICAL
FRONT PAGE
10mV/DIV
AC-COUPLED
4
V_OUT
LOW RIPPLE
3
FIGURE 20
10mV/DIV
2
AC-COUPLED
1
0
0 5 10 15 20 25 30 35 40
INPUT VOLTAGE (V)
3875 G22
V_IN = 12V
V_OUT = 2.5V
2µs/DIV
3875 G23
For more information www.linear.com/LTC3875
3875fa
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