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LTC3526-2_15 Datasheet, PDF (4/16 Pages) Linear Technology – 500mA 2MHz Synchronous Step-Up DC/DC Converters
LTC3526-2/LTC3526B-2
Typical Performance Characteristics
Start-Up Delay Time vs VIN
100
90
80
70
60
50
40
30
20
10
0
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
VIN (V)
35262b2 G07
Burst Mode Threshold Current
vs VIN
50
45
VOUT = 3.3V
COUT = 10µF
40 L = 2.2µH
35
LEAVE BURST
30
25
20
15
ENTER BURST
10
5
0
1.0
1.5
2.0
2.5
3.0
VIN (V)
35262b2 G08c
RDS(ON) vs VOUT
0.90
0.85
0.80
0.75
0.70
0.65
PMOS
0.60
0.55
0.50
0.45
0.40
NMOS
0.35
0.30
1.5 2.0 2.5 3.0 3.5 4.0
VOUT (V)
4.5 5.0
35262b2 G10
Burst Mode Threshold Current
vs VIN
30
VOUT = 1.8V
COUT = 10µF
25 L = 2.2µH
20
LEAVE BURST
15
ENTER BURST
10
5
0
1
1.25
1.5
VIN (V)
35262b2 G08a
Burst Mode Threshold Current
vs VIN
60
VOUT = 5V
COUT = 10µF
50 L = 2.2µH
40
LEAVE BURST
30
20
ENTER BURST
10
0
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
VIN (V)
35262b2 G08d
Oscillator Frequency Change
vs Temperature
10
NORMALIZED TO 25°C
8
6
4
2
0
–2
–4
–6
–8
–10
–50 –30 –10 10 30 50 70 90
TEMPERATURE (°C)
35262b2 G11

Burst Mode Threshold Current
vs VIN
40
VOUT = 2.5V
35 COUT = 10µF
L = 2.2µH
30
25
LEAVE BURST
20
15
ENTER BURST
10
5
0
1
1.25
1.5
1.75
VIN (V)
35262b2 G08b
Oscillator Frequency Change
vs VOUT
2
NORMALIZED TO 3.3V
1
0
–1
–2
–3
–4
–5
–6
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
VOUT (V)
35262b2 G09
RDS(ON) Change vs Temperature
1.3
NORMALIZED TO 25°C
1.2
1.1
1.0
0.9
0.8
0.7
–50 –30 –10 10 30 50
TEMPERATURE (°C)
70 90
35262b2 G12
35262b2fc