LTC3527 Linear Technology Corporation, LTC3527 Datasheet - Page 6

• Manufacturer Part Number: LTC3527
• Description: 1.2MHz/2.2MHz Synchronous Step-Up DC/DC Converters
• Manufacturer: Linear Technology Corporation

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LTC3527/LTC3527-1
TYPICAL PERFORMANCE CHARACTERISTICS
6
1.20
1.10
1.00
0.90
0.80
0.70
0.60
0.50
1.30
16
15
14
13
12
11
10
–45
1.5
Current Limit vs Temperature
Burst Mode Quiescent Current
vs V
V
V
V
IN
IN
OUT
–30
= 1.2V
= 1.2V
OUT
2
= 3.3V
–15
2.5
TEMPERATURE (°C)
0
CONVERTER1
CONVERTER2
V
10mV/DIV
3
COUPLED
15
OUT
SW1 PIN
2V/DIV
V
3.5
(V)
OUT1
30
AC
Fixed Frequency Switching
Waveform and V
V
V
C
45
IN1
OUT1
OUT1
4
= 1.2V
60
= 3.3V AT 100mA
= 10µF
4.5
35271 G20
35271 G17
75
90
5
500µs/DIV
OUT
1.205
1.200
1.195
1.190
1.185
0.90
0.80
0.70
0.60
0.50
0.40
0.30
Ripple
–55
1.5
Feedback Voltage vs Temperature
R
vs V
DS(ON)
NMOS1
–35 –15
OUT
2
35271 G23
PMOS2
NMOS2
(NMOS and PMOS)
2.5
TEMPERATURE (°C)
5
V
3
25
OUT
PMOS1
3.5
(V)
45
65
200mA/DIV
INDUCTOR
50mV/DIV
CURRENT
4
COUPLED
SW1 PIN
85 105 125
2V/DIV
V
OUT1
4.5
AC
35271 G21
(T
35271 G18
A
V
V
C
Burst Mode Waveforms
IN1
OUT1
OUT1
= 25°C, unless otherwise noted)
5
= 1.2V
= 3.3V
= 10µF
0.75
0.70
0.50
0.45
0.60
0.40
0.30
0.65
0.60
0.55
0.70
0.50
–50
–45
10µs/DIV
R
Change vs Temperature
Start-Up Voltage vs Temperature
DS(ON)
–30
–30
–15
(NMOS and PMOS)
–10
TEMPERATURE (°C)
TEMPERATURE (°C)
0
PMOS2
NMOS2
NMOS1
PMOS1
10
15
35271 G24
30
30
45
50
60
70
35271 G22
35271 G19
75
35271f
90
90