LTC3528B Linear Technology Corporation, LTC3528B Datasheet - Page 5

• Manufacturer Part Number: LTC3528B
• Description: 1MHz Synchronous Step-Up DC/DC Converters
• Manufacturer: Linear Technology Corporation

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TYPICAL PERFORMANCE CHARACTERISTICS
750
850
800
700
650
600
60
40
20
–1
–2
–3
–4
–5
0
5
4
3
2
1
0
–50
–50
1
Burst Mode Threshold Current
vs V
Start-Up Voltage vs Temperature
Oscillator Frequency Change
vs Temperature
V
NORMALIZED TO 25°C
OUT
–30
–30
IN
= 5V
–10
–10
TEMPERATURE (°C)
TEMPERATURE (°C)
2
10
10
RISING
V
IN
(V)
30
30
3
50
50
FALLING
70
70
3528 G11
3528 G17
3528 G14
90
90
4
–1.00
–1.25
–0.25
–0.50
–0.75
–1.50
–1.75
–2.00
–2.25
13.5
11.5
10.5
12.5
0.50
0.25
–20
–10
10
30
20
0
0
–50 –30
1.5
1
Oscillator Frequency Change
vs V
Burst Mode Quiescent Current vs
V
R
V
OUT
DS(ON)
IN
= 1.2V
OUT
2
(LTC3528)
2
Change vs Temperature
–10
2.5
TEMPERATURE (°C)
NORMALIZED TO V
V
10
V
3
OUT
OUT
3
(V)
3.5
(V)
30
50
4
4
OUT
4.5
70
3528 G18
(T
= 3V
3528 G15
3528 G12
A
90
5
= 25°C unless otherwise noted)
5
LTC3528/LTC3528B
200mA/DIV
20mV/DIV
1.185
1.200
1.195
1.190
1.180
100
450
400
350
300
250
200
150
V
OUT
1.5
–50
I
R
V
L
DS(ON)
FB
Fixed Frequency V
Inductor Current Waveforms
V
V
C
C
I
OUT
IN
OUT
OUT
FF
2
–30
vs Temperature
= 1.2V
= 33pF
= 100mA
= 3.3V
= 22μF
vs V
2.5
–10
TEMPERATURE (°C)
OUT
3
V
10
OUT
PMOS
NMOS
2μs/DIV
3.5
(V)
30
OUT
4
50
Ripple and
4.5
70
3528 G13
3528 G16
3528fa
5
3528 G19
90
5