LTC3834-1 Datasheet, PDF (5/28 Pages) Linear Technology – 30μA IQ Synchronous Step-Down Controller

LTC3834-1
TYPICAL PERFOR A CE CHARACTERISTICS T_A = 25ºC, unless otherwise noted.
Total Input Supply Current vs
Input Voltage
350
FIGURE 10 CIRCUIT
300
250
200
150
300μA LOAD
100
50
NO LOAD
0
5 10 15 20 25 30 35
INPUT VOLTAGE (V)
38341 G10
Maximum Current Sense Voltage
vs I_TH Voltage Cycle
100
FORCED CONTINUOUS
80
Burst Mode OPERATION
(RISING)
Burst Mode OPERATION
6O
(FALLING)
PULSE SKIPPING
40
20
0
–20
–40
0
10% DUTY CYCLE
0.2 0.4 0.6 0.8 1.0 1.2 1.4
I_TH PIN VOLTAGE (V)
38341 G13
INTV_CC Voltages vs Temperature
6.0
5.8
5.6
5.4
INTV_CC
5.2
5.0
4.8
4.6
4.4
4.2
4.0
–45 –25 –5 15 35 55 75 95
TEMPERATURE (°C)
38341 G11
SENSE Pins Total Input Bias
Current
60
30
0
–30
–60
–90
–120
–150
–180
–210
–240
–270
–300
0 1 2 3 4 5 6 7 8 9 10
V_SENSE COMMON MODE VOLTAGE (V)
38341 G14
INTV_CC Line Regulation
5.5
5.4
5.3
5.2
5.1
5.0
0
5 10 15 20 25 30 35 40
INPUT VOLTAGE (V)
38341 G12
Maximum Current Sense
Threshold vs Duty
120
100
80
60
40
20
0
0 10 20 30 40 50 60 70 80 90 100
DUTY CYCLE (%)
38341 G15
Foldback Current Limit
120
100
80
60
40
20
0
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
FEEDBACK VOLTAGE (V)
38341 G16
Quiescent Current vs Temperature
40
38
36
34
32
30
28
26
24
22
–45 –30 –15 0 15 30 45 60 75 90
TEMPERATURE (°C)
38341zz G17
38341f
5