LTC3832_15 Datasheet, PDF (4/24 Pages) Linear Technology – High Power Step-Down Synchronous DC/DC Controllers for Low Voltage Operation

LTC3832/LTC3832-1
TYPICAL PERFOR A CE CHARACTERISTICS
Load Regulation
2.54
T_A = 25°C
2.53 ^{REFER TO FIGURE 12}
2.52
2.51
2.50
2.49
2.48
2.47
2.46
–15
–10 –5 0
5 10 15
OUTPUT CURRENT (A)
3832 G01
Line Regulation
0.605
5
T_A = 25°C
0.604
4
0.603
3
0.602
2
0.601
1
0.600
0
0.599
–1
0.598
–2
0.597
–3
0.596
–4
0.595
–5
3
4
5
6
7
8
SUPPLY VOLTAGE (V)
3832 G02
Output Voltage Temperature Drift
2.55
50
REFER TO FIGURE 12
2.54 _{OUTPUT = NO LOAD}
40
2.53
30
2.52
20
2.51
10
2.50
0
2.49
–10
2.48
–20
2.47
–30
2.46
–40
2.45
–50 –25
0 25 50 75
TEMPERATURE (°C)
–50
100 125
3832 G04
Error Amplifier Sink/Source
Current vs Temperature
200
180
160
140
120
100
80
60
40
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3830 G05
Oscillator Frequency
vs Temperature
360
FREQSET FLOATING
350
340
330
320
310
300
290
280
270
260
250
240
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3832 G07
Oscillator Frequency
vs FREQSET Input Current
700
T_A = 25°C
600
500
400
300
200
100
0
–30 –20 –10 0
10 20 30
FREQSET INPUT CURRENT (µA)
3832 G08
Error Amplifier Transconductance
vs Temperature
2400
2300
2200
2100
2000
1900
1800
1700
1600
– 50 – 25
0 25 50 75
TEMPERATURE (°C)
100 125
3832 G03
Error Amplifier Open-Loop Gain
vs Temperature
70
65
60
55
50
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3832 G06
Oscillator (V_SAWH – V_SAWL)
vs External Sync Frequency
1.5
T_A = 25°C
1.4
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
100
200
300
400
500
EXTERNAL SYNC FREQUENCY (kHz)
3832 G09
4
sn3832 3832fs