MAX786EAI Maxim Integrated Products, MAX786EAI Datasheet - Page 11

• Manufacturer Part Number: MAX786EAI
• Description: DC/DC Switching Controllers Dual-Output Power Supply Controller
• Manufacturer: Maxim Integrated Products

Specifications of MAX786EAI

• Number Of Outputs: 2
• Output Voltage: 3.3 V, 3.45 V, 3.6 V
• Output Current: 10 A
• Input Voltage: 5.5 V to 30 V
• Mounting Style: SMD/SMT
• Package / Case: SSOP-28
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

second half-cycle, the PWM turns on the high-side
MOSFET by connecting the capacitor to the MOSFET
gate by closing an internal switch between BST_ and
DH_. This provides the necessary enhancement voltage
to turn on the high-side switch, an action that “boosts”
the 5V gate-drive signal above the battery voltage.
Figure 3. PWM Controller Block Diagram
5V REFERENCE)
(OR INTERNAL
REF, 3.3V
ON_
SS_
______________________________________________________________________________________
25mV
4 A
SLOPE COMP
N
COMPARATOR
Controller for Notebook Computers
3.3V
(IDLE MODE)
MAIN PWM
MINIMUM
CURRENT
60kHz
LPF
30R
1R
RECTIFIER CONTROL
SYNCHRONOUS
VL
0mV TO 100mV
R
S
Dual-Output Power-Supply
Q
CURRENT
LIMIT
Ringing seen at the high-side MOSFET gates (DH3 and
DH5) in discontinuous-conduction mode (light loads) is
a natural operating condition caused by the residual
energy in the tank circuit formed by the inductor and
stray capacitance at the LX_ nodes. The gate driver
negative rail is referred to LX_, so any ringing there is
directly coupled to the gate-drive supply.
1X
R
S
Q
OSC
THROUGH
CONTROL
SHOOT-
LEVEL
SHIFT
LEVEL
SHIFT
CS_
FB_
BST_
DH_
LX_
VL
DL_
PGND
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