LTC3440_15 Datasheet, PDF (5/20 Pages) Linear Technology – Micropower Synchronous Buck-Boost DC/DC Converter

Typical Performance Characteristics
LTC3440
Output Frequency
1.10
V_IN = V_OUT = 3.6V
1.05
NMOS R_DS(ON)
0.30
V_IN = V_OUT = 3.6V
SWITCHES B AND C
0.25
Feedback Voltage
1.236
V_IN = V_OUT = 3V
1.00
0.20
1.216
0.95
0.15
0.90
–55 –25 5
35 65
TEMPERATURE (°C)
95 125
3440 G13
Feedback Voltage Line Regulation
90
V_IN = V_OUT = 2.5V TO 5.5V
80
70
0.10
–55 –25 5
35 65
TEMPERATURE (°C)
95 125
3440 G14
1.196
–55 –25 5
35 65
TEMPERATURE (°C)
95 125
3440 G15
Error Amp Sink Current
430 _{VIN = VOUT = 3.6V}
410
PMOS R_DS(ON)
0.30 _{VIN = VOUT = 3.6V}
SWITCHES A AND D
0.25
390
0.20
370
0.15
60
–55
–25 5 35 65
TEMPERATURE (°C)
95 125
3440 G16
Boost Max Duty Cycle
90
V_IN = V_OUT = 3.6V
R_T = 60k
85
80
75
350
–55 –25 5
35 65
TEMPERATURE (°C)
95 125
3440 G17
Minimum Start Voltage
2.40
2.35
2.30
0.10
–55 –25 5
35 65
TEMPERATURE (°C)
95 125
3440 G18
Current Limit
3000
2500
PEAK SWITCH
V_IN = V_OUT = 3.6V
2000
1500
AVERAGE INPUT
70
–55 –25 5
35 65
TEMPERATURE (°C)
95 125
3440 G19
2.25
–55
–25 5 35 65
TEMPERATURE (°C)
95 125
3440 G20
For more information www.linear.com/LTC3440
1000
–55 –25 5
35 65
TEMPERATURE (°C)
95 125
3440 G21
3440fc
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