LTC3531_15 Datasheet, PDF (4/16 Pages) Linear Technology – 200mA Buck-Boost Synchronous DC/DC Converters

LTC3531/
LTC3531-3.3/LTC3531-3
TYPICAL PERFOR A CE CHARACTERISTICS T_A = 25°C unless otherwise specified.
Start-Up into Resistive Load
L = 10μH
30
28
26
24
22
20
18
16
14
12
10
1.5 2 2.5 3 3.5 4 4.5 5 5.5
V_IN (V)
3531 G07
Switch On Resistances
1000
V_IN = 5V
V_OUT = 3.3V
900
D (PMOS)
800
700
600
A (PMOS)
500
B,C (NMOS)
400
–40 –20
0 20 40 60
TEMPERATURE (°C)
80 100
3531 G10
Burst Frequency vs Load
(3.3V Version)
1000
L = 10μH
C_OUT = 10μF
100
50mA
10mA
10
5mA
1mA
1
0.5mA
0.1
1.5 2
2.5 3 3.5 4
V_IN (V)
4.5 5 5.5
3531 G08
I_PEAK, I_VALLEY vs Temperature
400
I_PEAK
350
300
250
I_VALLEY
200
150
100
50
0
–40 –20
I_ZERO
2.5V_IN
3.3V_OUT
10μH
0 20 40 60
TEMPERATURE (°C)
80 100
3531 G11
V_OUT Regulation vs Temperature
(3.3V Version)
3.350 _{VIN = 3.6V}
I_LOAD = 10mA
3.325
3.300
3.275
3.250
–40 –20
0 20 40 60
TEMPERATURE (°C)
80 100
3531 G09
SHDN Pin Threshold and
Hysteresis
1
0.9
0.8
OPERATING
0.7
SHUTDOWN
0.6
0.5
– 40 – 20
0 20 40 60
TEMPERATURE (°C)
80 100
3531 G12
3531fb
4