MP2491C Datasheet | Step-Down Converter





MP2491C PDF File (Datasheet) Download

Part Number MP2491C
Description Step-Down Converter
Manufacture MPS
Total Page 20 Pages
PDF Download Download MP2491C PDF File

Features: MP2491C 32V, 6A, Step-Down Converter wit h Programmable Current Limit and Output Voltage Scaling Control DESCRIPTION T he MP2491C is a fully integrated, high- voltage, step-down converter. The MP249 1C can achieve 6A of continuous output current with excellent load and line re gulation over a wide input supply range . Constant-on-time (COT) control operat ion provides very fast transient respon se, easy loop design, and very tight ou tput regulation. Full protection featur es include over-current protection (OCP ), hiccup current limiting, output over -voltage protection (OVP), and thermal shutdown. The MP2491C requires a minima l number of readily available, standard , external components and is available in a QFN-13 (2.5mmx3mm) package. FEATU RES  Wide 4.0V to 32V Operating Inpu t Range  0.5V to 30V Output Voltage Range  6A Output Current  Constan t-on-Time (COT) Control  Two Dedicat e Voltage Scaling Control Pins  Slew Rate Control during DVS  Low Dropout Mode Operation  33mΩ/22mΩ Internal .

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MP2491C
32V, 6A, Step-Down Converter
with Programmable Current Limit
and Output Voltage Scaling Control
DESCRIPTION
The MP2491C is a fully integrated, high-voltage,
step-down converter. The MP2491C can
achieve 6A of continuous output current with
excellent load and line regulation over a wide
input supply range.
Constant-on-time (COT) control operation
provides very fast transient response, easy loop
design, and very tight output regulation.
Full protection features include over-current
protection (OCP), hiccup current limiting, output
over-voltage protection (OVP), and thermal
shutdown.
The MP2491C requires a minimal number of
readily available, standard, external
components and is available in a QFN-13
(2.5mmx3mm) package.
FEATURES
Wide 4.0V to 32V Operating Input Range
0.5V to 30V Output Voltage Range
6A Output Current
Constant-on-Time (COT) Control
Two Dedicate Voltage Scaling Control Pins
Slew Rate Control during DVS
Low Dropout Mode Operation
33mΩ/22mΩ Internal MOSFET Switches
450µA IQ
Fixed 490kHz Switching Frequency
Output Line Drop Compensation when VFB =
0.5V
EN Shutdown Discharge
Output Over-Voltage Protection (OVP)
Adjustable Auto-PFM/PWM Mode or Forced
PWM Mode
Adjustable Current Limit
Power Good (PG) Indication
Available in a QFN-13 (2.5mmx3mm)
Package
APPLICATIONS
TVs, Monitors
MFP Power Supplies
USB Power Supplies with PD
Automotive Cigarette Lighter Adapters
All MPS parts are lead-free, halogen-free, and adhere to the RoHS
directive. For MPS green status, please visit the MPS website under
Quality Assurance. “MPS”, the MPS logo, and “Simple, Easy Solutions” are
trademarks of Monolithic Power Systems, Inc. or its subsidiaries.
TYPICAL APPLICATION
VIN 24V
C1
30μF
R6
300kΩ
C3
2.2μF
R5
51kΩ
U1
IN SW
EN
VCC
MP2491C
BST
FB
VSEL1
VSEL2
MODE
PG
ILIM
AGND PGND
L1 4.7μH
C4 R1
1μF 100kΩ
R2
11kΩ
VOUT
5V
C2
88μF
Efficiency vs. Load Current
VIN=24V
100
95
90
85
80
75
70
0.01
VOUT=5V
VOUT=9V
VOUT=12V
0.1 1
LOAD CURRENT (A)
10
MP2491C Rev. 1.0
www.MonolithicPower.com
11/14/2018
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2018 MPS. All Rights Reserved.
1

                    
                    






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