LTC3882_15 Datasheet, PDF (10/104 Pages) Linear Technology – Dual Output PolyPhase Step-Down DC/DC Voltage Mode Controller with Digital Power System Management

LTC3882
TYPICAL PERFORMANCE CHARACTERISTICS
Regulated Output vs Temperature
1.8000
1.7995
VOUT_COMMAND = 1.8V
DIGITAL SERVO OFF
1.7990
1.7985
1.7980
1.7975
1.7970
–40 –20
0 20 40 60 80 100 120
TEMPERATURE (°C)
3882 G13
VOUT_COMMAND INL
1.5
1.0
0.5
0
–0.5
–1.0
0.3 1.1 1.9 2.7 3.5 4.3 5.1 5.5
V_OUT (V)
3882 G14
VOUT_COMMAND DNL
1.0
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
0.3 1.1 1.9 2.7 3.5 4.3 5.1 5.5
V_OUT (V)
3882 G15
Output Overvoltage Threshold
Error vs Temperature
0.10
0.05
0
–0.05
–0.10
VOUT_OV_FAULT_LIMIT = 2V
V_OUT RANGE = 1
–0.15
–40 –20 0 20 40 60 80
TEMPERATURE (°C)
100 120
3882 G16
Output Overcurrent Threshold
Error vs Temperature
1.2
1.0
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–40 –20
0 20 40 60 80 100 120
TEMPERATURE (°C)
3882 G17
PWM Frequency vs Temperature
500.2
500.1
500.0
499.9
499.8
499.7
499.6
499.5
–40 –20
FREQUENCY_SWITCH = 500kHz
0 20 40 60 80 100 120
TEMPERATURE (°C)
3882 G18
V_IN(SNS) ADC TUE
0
–1
–2
–3
–4
–5
–6
–7
–8
–9
0 5 10 15 20 25 30 35 40
VINSNS (V)
3882 G19
V_OUT ADC TUE
0.40
0.30
0.20
0.10
0
–0.10
–0.20
–0.30
–0.40
0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5
V_OUT (V)
3882 G20
10
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I_OUT ADC TUE
8
6
4
2
0
–2
–4
–6
–8
0
5
10
15
OUTPUT CURRENT (A)
20
3882 G21
3882f