LTC3827 Datasheet, PDF (28/36 Pages) Linear Technology – Low IQ, Dual, 2-Phase Synchronous Step-Down Controller

LTC3827
APPLICATIONS INFORMATION
2. Are the signal and power grounds kept separate? The
combined IC signal ground pin and the ground return
of C_INTVCC must return to the combined C_OUT (–) termi-
nals. The path formed by the top N-channel MOSFET,
Schottky diode and the C_IN capacitor should have short
leads and PC trace lengths. The output capacitor (–)
terminals should be connected as close as possible
to the (–) terminals of the input capacitor by placing
the capacitors next to each other and away from the
Schottky loop described above.
SW1
D1
V_IN
R_IN
C_IN
BOLD LINES INDICATE
HIGH SWITCHING
CURRENT. KEEP LINES
TO A MINIMUM LENGTH.
SW2
D2
L1
R_{SENSE1 VOUT1}
C_OUT1
L2
R_{SENSE2 VOUT2}
C_OUT2
Figure 12. Branch Current Waveforms
R_L1
R_L2
3827 F12
3827ff
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