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LTC3850-2 Datasheet, PDF (18/36 Pages) Linear Technology – Dual, 2-Phase Synchronous Step-Down Switching Controller
LTC3850-2
APPLICATIONS INFORMATION
VOUT1
VOUT2
VOUT1
VOUT2
TIME
38502 F03a
(5a) Coincident Tracking
TIME
38502 F03b
(5b) Ratiometric Tracking
Figure 5. Two Different Modes of Output Voltage Tracking
VOUT1
TO
TK/SS2
PIN
R3 R1
TO
TO
VFB1 VFB2
PIN
PIN
R4 R2
VOUT2
R3
R4
(6a) Coincident Tracking Setup
VOUT1
TO
TK/SS2
PIN
R1
TO
TO
VFB1
VFB2
PIN
PIN
R2
VOUT2
R3
R4
38502 F06
(6b) Ratiometric Tracking Setup
Figure 6. Setup for Coincident and Ratiometric Tracking
18
D1
TK/SS2
0.8V
VFB2
I
I
+
D2
EA2
–
D3
38502 F07
Figure 7. Equivalent Input Circuit of Error Amplifier
38502f