MAX1887 Maxim Integrated Products, MAX1887 Datasheet - Page 14

• Manufacturer Part Number: MAX1887
• Description: (MAX1887 / MAX1897) Quick-PWM Slave Controllers
• Manufacturer: Maxim Integrated Products

number of phases (1/
phase converter. This significantly reduces the I
es across the inductor’s series resistance, the
MOSFETs on-resistance, and the board resistance.
Quick-PWM Slave Controllers for
Multiphase, Step-Down Supplies
Figure 2. Functional Diagram
14
(SHDN)*
(TON)*
(V
COMP
LIMIT
CM+
CC
CM-
CS+
CS-
______________________________________________________________________________________
V+
)*
CM LIMIT
POSITIVE
η
CONTROLLER
) when compared to a single-
BIAS
GMM
GMS
(MAX1897)*
MAX1887
2
R loss-
TRIG
COMPUTE
ONE-SHOT
ON-TIME
TON
NEGATIVE
CS LIMIT
Q
Multiphase systems can stagger the on times of each
phase (out-of-phase operation) or simultaneously turn on
all phases at the beginning of a new cycle (in-phase
operation). When configured for out-of-phase operation,
high input-to-output differential voltages (V
POSITIVE
CS LIMIT
In-Phase and Out-of-Phase Operation
Q
ONE-SHOT
R
S
TOFF
TRIG
Q
Q
Q
DETECTOR
EDGE
17R
R
2R
TRIG
IN
>
BST
DH
LX
V
DL
PGND
TRIG
(POL)*
ILIM
GND
DD
η
V
OUT
)