MP2497-A Datasheet, PDF (1/14 Pages) Monolithic Power Systems – 3A, 50V, 100kHz Step-Down Converter with Programmable Output OVP Threshold

MP2497-A
3A, 50V, 100kHz Step-Down Converter
with Programmable Output OVP Threshold
The Future of Analog IC Technology
DESCRIPTION
The MP2497-A is a monolithic step-down
switch mode converter with a programmable
output current limit. The MP2497-A is the high
efficiency version of MP2497. It has fast
switching speed thus the switching loss is
greatly reduced. It achieves 3A continuous
output current over a wide input supply range
with excellent load and line regulation. An
internal 2-4ms soft start prevents inrush current at
turning on. And it is capable of providing output
line drop compensation.
Fault condition protection includes hiccup current
limit and short circuit protection, programmable
output over voltage protection and thermal
shutdown.
The MP2497-A requires a minimum number of
readily available standard external components.
The MP2497-A is available in SOIC8E
package.
FEATURES
 Wide 4.5V to 50V Operating Input Range
 Programmable Output Over Voltage
Protection
 Output Adjustable from 0.8V to 25V
 0.15Ω Internal Power MOSFET Switch
 Internal 4ms Soft Start
 Stable with Low ESR Output Ceramic
Capacitors
 Fixed 100kHz Frequency
 Fast Switching Speed
 Thermal Shutdown
 Output Line Drop Compensation
 Hiccup Circuit Limit and Short Circuit
Protection
 Available in SOIC8E Package
APPLICATIONS
 USB Power Supplies
 Automotive Cigarette Lighter Adapters
 Power Supply for Linear Chargers
All MPS parts are lead-free and adhere to the RoHS directive. For MPS green
status, please visit MPS website under Products, Quality Assurance page.
“MPS” and “The Future of Analog IC Technology” are registered trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
R6
VIN
C1
GND
C2
BST
SW
VIN
C11
OVP
MP2497-A
L1
C6
Diode
C3 C4 C10
Rsense
+
R4
R3
GND
FB
ISP
C7
R7
10nF
ISN
C8
R5
10nF
C9
150pF
R1
R2
VOUT
C5
GND
Efficiency vs.
Output Current
95
90
85
80
V_IN=12V
75
V_IN=24V
70
V_IN=50V
65
60
0.1 0.5 0.9 1.3 1.7 2.1 2.5 2.9
OUTPUT CURRENT(A)
MP2497-A Rev. 1.0
www.MonolithicPower.com
1
5/30/2012
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.