Datasheet

LTC3532
4
3532fc
TEMPERATURE (°C)
V
IN
= 3.6V
–55
FREQUENCY (MHz)
1000
1050
1100
95
3532 G07
950
900
800
–5
45
850
1200
1150
TEMPERATURE (°C)
–55
1.196
FEEDBACK VOLTAGE (V)
1.201
1.211
1.216
1.221
45
1.241
3532 G08
1.206
–5 95
1.226
1.231
1.236
V
OUT
200mV/DIV
I
LOAD
100mA/DIV
100μs/DIV
C
OUT
= 10μF
V
IN
= 3.6V
V
OUT
= 3.3V
3535 G09
Effi ciency vs Frequency
Peak Current Clamp and Limit
vs V
IN
Automatic Burst Threshold
vs R
BURST
Burst Mode to Fixed Frequency
Transition
Switch Pins in Buck-Boost Mode
Switch Pins Before Entering
Boost Mode
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Frequency vs Temperature Feedback Voltage vs Temperature
Load Transient Response in
Fixed Frequency Mode
T
A
= 25°C, unless otherwise specifi ed.
FREQUENCY (kHz)
500
80
EFFICIENCY (%)
84
86
88
90
92
94
1000
1500
3532 G04
96
98
100
82
2000
V
IN
= 3.6V
V
OUT
= 3.3V
V
IN
(V)
2.4
INPUT CURRENT (A)
0.8
1.0
1.2
5.4
3532 G05
0.6
0.4
0
3.4
4.4
0.2
1.6
1.4
V
OUT
= 3.3V
I
CLAMP
I
LIMIT
BURST RESISTOR (kΩ)
150
10
LOAD CURRENT (mA)
20
30
40
50
60
70
250 350 450 550
3532 G06
LEAVE BURST
ENTER BURST
V
OUT
= 3.3V
V
IN
= 3.6V
SW1
2V/DIV
SW2
2V/DIV
40ns/DIV
V
IN
= 3.3V
V
OUT
= 3.3V
I
LOAD
= 100mA
3532 G11
SW1
2V/DIV
SW2
2V/DIV
40ns/DIV
V
IN
= 2.9V
V
OUT
= 3.3V
I
LOAD
= 100mA
3532 G12
V
OUT
200mV/DIV
BURST PIN
2V/DIV
400μs/DIV
C
OUT
= 22μF
V
IN
= 3.6V
V
OUT
= 3.3V
3532 G10