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

MP2497
3A, 50V, 100kHz Step-Down Converter
with Programmable Output OVP Threshold
The Future of Analog IC Technology
DESCRIPTION
The MP2497 is a monolithic step-down switch
mode converter with a programmable output
current limit. 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.
MP2497 achieves low EMI signature with well
controlled switching edges.
Fault condition protection includes hiccup current
limit and short circuit protection, programmable
output over voltage protection and thermal
shutdown.
The MP2497 requires a minimum number of
readily available standard external components.
The MP2497 is available in SOIC8 and 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
• Low EMI Signature
• Thermal Shutdown
• Output Line Drop Compensation
• Hiccup Circuit Limit and Short Circuit
Protection
• Available in SOIC8 and 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
0O
C2
BST
SW
2.2µF
VIN
VIN
C1
220µF
C11
0.1µF
OVP
GND
MP2497
C6
0.1µF
L1
33µH
C3
C4 C10
100µF 22µF 0.1µF
+
D1
R4
10kO
R3
39kO
GND
FB
ISP
C7
10nF
ISN
C8
10nF
R7
1kO
R5
1kO
C9
150pF
R1
R2 _301kO
57.6kO
R SE NS E
33mO
C5
0.1µ F
V OUT
GND
Efficiency vs.
Output Current
V_OUT=5V
95
90
V_IN=12V
85
80
V_IN=24V
75
70
V_IN=50V
65
60
55
0.1 0.5 0.9 1.3 1.7 2.1 2.5 2.9
OUTPUT CURRENT (A)
MP2497 Rev. 1.12
www.MonolithicPower.com
1
12/22/2011
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.