Rainbow Electronics MAX8775 - Manual (Page 14)

MAX8775
current balance. PGOOD1 indicates when the com-
bined output is in regulation, while PGOOD2 indicates
the currents in both phases are balanced. Phase 2 can
be enabled or disabled based on the load current required, maximizing efficiency over the full output cur-
rent range.
Figure 3 is the MAX8775 functional block diagram.
Dual and Combinable Graphics Core
Controller for Notebook Computers
14 ______________________________________________________________________________________
2.5V REF
REF
SMPS 1
CSL1
ON1
PGOOD1
CSH1
DL1
DH1
LX1
BST1
AGND
V CC V DD
SKIP1
V
IN
REFIN1
DTRANS
OVP1
SLEW1
+5V BIAS
OSC
SMPS 2
ON2
CSL2
CSH2
DL2
DH2
LX2
BST2
SKIP2
PGOOD 2
OVP2
REFIN2
CCI2
SLEW2
SLOPE COMP
Σ
PGND
4X
REFIN
POWER-
GOOD TRANS
REFIN
SLEW
SOFT-START/
SOFT-STOP
OVP
OSC
PWM
DRIVER
BLOCK
MAX8775
Figure 3. MAX8775 Functional Block Diagram