LTC3532_15 Datasheet, PDF (4/16 Pages) Linear Technology – Micropower Synchronous Buck-Boost DC/DC Converter

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