Datasheet

LTC3773
8
3773fb
V
SENSE
COMMON MODE VOLTAGE (V)
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5
I
SENSE
(μA)
40
3773 G19
20
30
0
10
–10
–20
–30
V
CC
= 5V
I
SENSE
= I
SENSE
+
= I
SENSE
–
TEMPERATURE (°C)
–50 –25 0 25 50 75 100 125
SWITCHING FREQUENCY (kHz)
650
3773 G20
550
600
350
450
400
500
300
250
200
150
V
PLLFLTR
= 5V
PLLFLTR FLOATING
V
PLLFLTR
= 0V
V
PLLFLTR
(V)
0 0.5 1 1.5 2 2.5 3
SYNCHRONIZATION SWITCHING FREQUENCY (kHz)
800
3773 G21
700
400
500
600
300
200
100
V
CC
= 5V
TEMPERATURE (°C)
–50 –25 0 25 50 75 100 125
TG MINIMUM PULSE WIDTH (ns)
180
3773 G22
140
160
120
100
V
SENSE
= 100mV STEP
TEMPERATURE (°C)
–50 –25 0 25 50 75 100 125
MAXIMUM DUTY FACTOR (%)
100
3773 G23
92
96
88
84
80
DROPOUT
TG, BG OPEN
V
PLLFLTR
= 0V
PLLFLTR FLOATING
V
PLLFLTR
= 5V
V
PLLFLTR
= 0V, f
SW
= 220kHz
V
PLLFLTR
FLOATING, f
SW
= 400kHz
V
PLLFLTR
= 5V, f
SW
= 560kHz
TYPICAL PERFORMANCE CHARACTERISTICS
SENSE Pin Input Current vs
SENSE Common Mode Voltage
Switching Frequency
vs Temperature
Synchronization Switching
Frequency vs V
PLLFLTR
TG Minimum Pulse Width
vs Temperature
Maximum Duty Factor
vs Temperature
Maximum Current Limit
Threshold vs V
FB
V
FB
(mV)
0
V
SENSE
(mV)
80
600500400
3773 G18
50
70
60
30
40
20
10
0
100 200
300
V
TRACK
= 1V