Datasheet

LTC3526L/LTC3526LB
4
3526lfc
–50 –30 –10 10 30 50 70 90
TEMPERATURE (°C)
NORMALIZED R
DS(ON)
1.0
1.1
1.2
3526l G12
0.8
0.7
1.3
0.9
NORMALIZED TO 25°C
Start-Up Delay Time vs V
IN
Burst Mode Threshold Current
vs V
IN
(LTC3526L)
Oscillator Frequency Change
vs V
OUT
R
DS(ON)
vs V
OUT
Oscillator Frequency Change
vs Temperature R
DS(ON)
Change vs Temperature
V
IN
(V)
1.0
0
DELAY (µs)
10
30
40
50
100
70
2.0
3.0
3.5
3526l G07
20
80
90
60
1.5
2.5
4.0
4.5
V
IN
(V)
1.0
0
LOAD CURRENT (mA)
5
10
15
20
25
30
1.25 1.5
3526l G08a
ENTER BURST
LEAVE BURST
V
OUT
= 1.8V
C
OUT
= 10µF
L = 4.7µH
Burst Mode Threshold Current
vs V
IN
(LTC3526L)
V
IN
(V)
1.0
LOAD CURRENT (mA)
15
20
25
3526l G08b
10
5
0
1.25 1.5
30
2.01.75
ENTER BURST
LEAVE BURST
V
OUT
= 2.5V
C
OUT
= 10µF
L = 4.7µH
Burst Mode Threshold Current
vs V
IN
(LTC3526L)
Burst Mode Threshold Current
vs V
IN
(LTC3526L)
V
IN
(V)
1.0
0
LOAD CURRENT (mA)
5
15
20
25
35
1.5
2.0
3526l G08c
10
40
30
2.5
3.0
ENTER BURST
LEAVE BURST
V
OUT
= 3.3V
C
OUT
= 10µF
L = 4.7µH
V
IN
(V)
1.0
LOAD CURRENT (mA)
40
50
2.5 3.5
3526l G08d
30
20
1.5 2.0
3.0 4.0 4.5
10
0
ENTER BURST
LEAVE BURST
V
OUT
= 5V
C
OUT
= 10µF
L = 4.7µH
V
OUT
(V)
1.5
FREQUENCY CHANGE (%)
1
2
3
3.0 4.0
3526l G09
0
–1
2.0 2.5
3.5 4.5 5.0
–2
–3
NORMALIZED TO V
OUT
= 3.3V
V
OUT
(V)
1.5
R
DS(ON)
(Ω)
0.50
0.45
0.80
0.85
0.90
2.5
3.5
4.0
3526l G10
0.35
0.70
0.60
0.40
0.75
0.30
0.65
0.55
2.0
3.0
4.5
5.0
PMOS
NMOS
–50 –30 –10 10 30 50 70 90
TEMPERATURE (°C)
FREQUECNY CHANGE (%)
4
6
8
3526l G11
0
–10
–8
–6
10
2
–2
–4
NORMALIZED TO 25°C
typicAl perForMAnce chArActeristics