MAX1980ETP+ Maxim Integrated Products, MAX1980ETP+ Datasheet - Page 14

• Manufacturer Part Number: MAX1980ETP+
• Description: IC CNTRLR QUICK-PWM 20-TQFN
• Manufacturer: Maxim Integrated Products

Specifications of MAX1980ETP+

• Pwm Type: Controller
• Number Of Outputs: 1
• Frequency - Max: 550kHz
• Duty Cycle: 50%
• Voltage - Supply: 4 V ~ 28 V
• Buck: Yes
• Boost: No
• Flyback: No
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: No
• Operating Temperature: 0°C ~ 85°C
• Package / Case: 20-TQFN Exposed Pad
• Frequency-max: 550kHz
• Input Voltage: 4 V to 28 V
• Mounting Style: SMD/SMT
• Maximum Operating Temperature: + 100 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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 opera-
tion, high input-to-output differential voltages (V
η
Quick-PWM Slave Controller with
Driver Disable for Multiphase DC-DC Converter
Figure 2. Functional Diagram
14
V
OUT
COMP
LIMIT
CM+
TON
CM-
CS+
V
CS-
______________________________________________________________________________________
CC
V+
) prevent the on times from overlapping.
ILIM
In-Phase and Out-of-Phase Operation
CM LIMIT
POSITIVE
CONTROLLER
0.25V
BIAS
GMM
GMS
STANDBY
CONTROLLER
SUPPLY
PWM
MAX1980
TRIG
IN
COMPUTE
ONE-SHOT
ON-TIME
TON
>
NEGATIVE
CS LIMIT
Q
Therefore, the instantaneous input-current peaks of
each phase do not overlap, resulting in reduced input-
and output-voltage ripple and RMS ripple current. This
lowers the input- and output-capacitor requirements,
which allows fewer or less expensive capacitors, and
decreases shielding requirements for EMI. When the on
times overlap at low input-to-output differential voltages
POSITIVE
CS LIMIT
Q
ONE-SHOT
R
S
TOFF
TRIG
Q
Q
Q
DETECTOR
EDGE
17R
R
2R
TRIG
DD
BST
DH
LX
V
DL
PGND
TRIG
POL
ILIM
GND
DD