LTC3537 Просмотр технического описания (PDF) - Linear Technology
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LTC3537 Datasheet PDF : 22 Pages
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LTC3537
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted.
Burst Mode Threshold Current
vs VINB
60
VOUTB = 3.3V
COUTB = 10μF
50 L = 2.2μH
40
LEAVE BURST
30
ENTER BURST
20
10
0
0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4
VINB (V)
3537 G10
RDS(ON) vs VOUTB
1.0
0.9
0.8
0.7
PMOS
0.6
0.5
0.4
NMOS
0.3
0.2
1.5 2 2.5 3 3.5 4 4.5 5
VOUTB (V)
3537 G13
Feedback Voltage Change
vs Temperature
0.05
NORMALIZED TO 20°C
0.00
–0.10
VFBB AND VFBL
–0.15
–0.20
–0.25
–0.30
–40 –20 0
20 40 60 80
TEMPERATURE (°C)
3537 G16
6
Burst Mode Threshold Current
vs VINB
180
VOUTB = 5V
160 COUTB = 10μF
L = 2.2μH
140
120
100
80
LEAVE BURST
60
40
ENTER BURST
20
0
0.9 1.4 1.9 2.4 2.9 3.4 3.9 4.4
VINB (V)
3537 G11
Oscillator Frequency Change vs
Temperature
1
NORMALIZED TO 25°C
0
–1
–2
–3
–4
–40 –20 0
20 40 60 80
TEMPERATURE (°C)
3537 G14
Start-Up Voltage vs Temperature
0.80
0.75
0.70
0.65
0.60
0.55
0.50
–40 –20
0 20 40 60
TEMPERATURE (°C)
80
3537 G17
Oscillator Frequency Change
vs VOUTB
1
NORMALIZED TO 3.3V
0
–1
–2
–3
–4
–5
–6
1.5 2 2.5 3 3.5 4 4.5 5
VOUTB (V)
3537 G12
RDS(ON) Change vs Temperature
30
NORMALIZED TO 25°C
20
10
0
PMOS
–10
–20
NMOS
–30
–40 –20
0 20 40 60
TEMPERATURE (°C)
80
3537 G15
Burst Mode Quiescent Current
vs VOUTB
60
50
40
30
20
VINB = 1.2V
ENLDO = HIGH
10
1.8 2.3 2.8 3.3 3.8 4.3 4.8
VOUTB (V)
3537 G18
3537fd
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