LTC3869 Datasheet, PDF (7/40 Pages) Linear Technology – Dual, 2-Phase Synchronous Step-Down DC/DC Controllers

LTC3869/LTC3869-2
TYPICAL PERFORMANCE CHARACTERISTICS T_A = 25°C, unless otherwise noted.
Shutdown (RUN) Threshold
vs Temperature
1.24
1.22
ON
1.20
1.18
1.16
1.14
1.12
OFF
1.10
1.08
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3869 G18
Regulated Feedback Voltage
vs Temperature
604
602
600
598
596
594
592
590
–40 –15
10 35 60 85
TEMPERATURE (°C)
110 125
3869 G19
Oscillator Frequency
vs Temperature
900
800
700
V_FREQ = INTV_CC
600
500
V_FREQ = 1.2V
400
300
200
V_FREQ = GND
100
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3869 G20
Undervoltage Lockout Threshold
(INTV_CC) vs Temperature
4.1
3.9
RISING
3.7
3.5
3.3
FALLING
3.1
2.9
2.7
2.5
–40 –20
0 20 40 60
TEMPERATURE (°C)
80 100
3869 G21
Oscillator Frequency
vs Input Voltage
520
510
500
490
480
5
10 15 20 25 30 35 40
INPUT VOLTAGE (V)
3869 G22
Shutdown Current
vs Input Voltage
60
50
40
30
20
10
0
5 10 15 20 25 30 35 40
INPUT VOLTAGE (V)
3869 G23
Shutdown Current
vs Temperature
45
40
35
30
25
20
15
10
5
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3869 G24
Quiescent Current
vs Input Voltage without EXTV_CC
3.8
3.6
3.4
3.2
3.0
2.8
2.6
2.4
2.2
2.0
1.8
5
10 15 20 25 30 35 40
INPUT VOLTAGE (V)
3869 G25
3869f
7