LTC3773 Datasheet, PDF (8/32 Pages) Linear Technology – Triple Output Synchronous 3-Phase DC/DC Controller with Up/Down Tracking

LTC3773
TYPICAL PERFORMANCE CHARACTERISTICS
Maximum Current Limit
Threshold vs V_FB
80
V_TRACK = 1V
70
60
50
40
30
20
10
0
0 100 200 300 400 500 600
V_FB (mV)
3773 G18
SENSE Pin Input Current vs
SENSE Common Mode Voltage
40
30 ^{VISCECNS=E5=VISENSE+ = ISENSE–}
20
10
0
–10
–20
–30
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5
V_SENSE COMMON MODE VOLTAGE (V)
3773 G19
8
Switching Frequency
vs Temperature
650
600 VPLLFLTR = 5V
550
500
450 _{PLLFLTR FLOATING}
400
350
300
250 V_PLLFLTR = 0V
200
150
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3773 G20
TG Minimum Pulse Width
vs Temperature
180
V_SENSE = 100mV STEP
160
140
120
100
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3773 G22
Synchronization Switching
Frequency vs V_PLLFLTR
800
V_CC = 5V
700
600
500
400
300
200
100
0 0.5 1 1.5 2
V_PLLFLTR (V)
Maximum Duty Factor
vs Temperature
100
2.5 3
3773 G21
96 DROPOUT
92
V_PLLFLTR = 0V
PLLFLTR FLOATING
V_PLLFLTR = 5V
V_PLLFLTR = 0V, f_SW = 220kHz
88
V_PLLFLTR FLOATING, f_SW = 400kHz
84
TG, BG OPEN
80
–50 –25 0
V_PLLFLTR = 5V, f_SW = 560kHz
25 50 75 100 125
TEMPERATURE (°C)
3773 G23
3773fb