LTC3618_15 Datasheet, PDF (7/24 Pages) Linear Technology – Dual 4MHz, 3A Synchronous Buck Converter for DDR Termination

LTC3618
Typical Performance Characteristics T_A = 25°C, V_IN = 3.3V, f = 1MHz, Figure 3 Circuit,
unless otherwise noted.
Switch Leakage Current
vs Temperature
2.0
V_IN = 5.5V
1.8
1.6
1.4
1.2
1.0
MAIN SWITCH
0.8
0.6
0.4
0.2
SYNCHRONOUS SWITCH
0
–40 –25 –10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
3618 G19
No Load Supply Current
vs Input Voltage
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
2.25 2.75
3.25 3.75 4.25 4.75
INPUT VOLTAGE (V)
5.25
3618 G20
No Load Supply Current
vs Temperature
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
–45 –20
5 30 55 80
TEMPERATURE (°C)
105
3618 G21
Sinking Current
SW1
SW2
I_L2
1A/DIV
I_L1
1A/DIV
V_DDQ = 1.8V
400ns/DIV
V_TT = 0.9V
I_LOAD1, I_LOAD2 = –3A
3618 G22
Tracking Up/Down
TRACK/SS
500mV/DIV
V_DDQ
500mV
PGOOD
5V/DIV
2ms/DIV
FORCED CONTINUOUS MODE
V_DDQ = 0V to 0.6V
I_LOAD = 1A
3618 G23
Internal Start-Up V_DDQ
RUN
5V/DIV
PGOOD
2V/DIV
V_DDQ
1V/DIV
I_L
1A/DIV
V_DDQ = 1.8V
NO LOAD
1ms/DIV
3618 G24
Internal Start-Up V_TT
RUN
5V/DIV
PGOOD
2V/DIV
V_TT
500mV/DIV
I_L
1A/DIV
V_TT = 0.9V
NO LOAD
400µs/DIV
3618 G25
For more information www.linear.com/LTC3618
3618fc
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