LTC3630
ELECTRICAL CHARACTERISTICS
Note that the maximum ambient temperature consistent with these
specifications is determined by specific operating conditions in
conjunction with board layout, the rated package thermal impedance and
other environmental factors.
junction temperature may impair device reliability or permanently damage
the device. The overtemperature protection level is not production tested.
Note 5: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency. See Applications Information.
Note 4: This IC includes over temperature protection that is intended to
protect the device during momentary overload conditions. The maximum
rated junction temperature will be exceeded when this protection is active.
Continuous operation above the specified absolute maximum operating
Note 6: For application concerned with pin creepage and clearance
distances at high voltages, the MSOP package should be used. See
Applications Information.
TYPICAL PERFORMANCE CHARACTERISTICS
Load Step Transient Response
Soft-Start Waveform
Short-Circuit Response
OUTPUT
VOLTAGE
2V/DIV
OUTPUT
VOLTAGE
50mV/DIV
OUTPUT
VOLTAGE
2V/DIV
LOAD
CURRENT
200mA/DIV
INDUCTOR
CURRENT
500mA/DIV
INDUCTOR
CURRENT
500mA/DIV
3630 G01
3630 G02
3630 G03
C
= 100ꢀF
1ms/DIV
V
V
= 12V
OUT
FIGURE 13 CIRCUIT
500ꢀs/DIV
V
V
= 12V
OUT
FIGURE 13 CIRCUIT
200ꢀs/DIV
OUT
IN
IN
FIGURE 13 CIRCUIT
= 5V
= 5V
Efficiency and Power Loss
vs Load Current, VOUT = 5V
Efficiency and Power Loss
Efficiency and Power Loss
vs Load Current, VOUT = 3.3V
vs Load Current, VOUT = 1.8V
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
V
= 1.8V
OUT
FIGURE 13 CIRCUIT
EFFICIENCY
EFFICIENCY
POWER
EFFICIENCY
1000
100
10
1000
100
10
1000
100
10
1
POWER
POWER
V
= 3.3V
V
= 5V
OUT
FIGURE 13 CIRCUIT
OUT
FIGURE 13 CIRCUIT
V
IN
V
IN
= 12V
= 65V
V
IN
V
IN
= 12V
= 65V
1
V
IN
V
IN
= 12V
= 65V
1
0.1
1
10
100
1000
0.1
1
10
100
1000
0.1
1
10
100
1000
LOAD CURRENT (mA)
LOAD CURRENT (mA)
LOAD CURRENT (mA)
3630 G05
3630 G06
3630 G04
3630fb
4
Linear Systems [ Linear Systems ]
