MP24971 Datasheet: Step-Down Converter





MP24971 Datasheet PDF Download

Part Number MP24971
Description Step-Down Converter
Manufacture MPS
Total Page 14 Pages
PDF Download Download MP24971 Datasheet PDF

Features: The Future of Analog IC Technology MP24 971 1.5A, 50V, 100kHz, 5V Fixed Output StepDown Converter with Programmable Cu rrent Limit and Output Line-Drop Compen sation DESCRIPTION The MP24971 is a mo nolithic, step-down, switch-mode conver ter with a programmable output-current limit. It has a fixed 5V/1.5A continuou s output over a wide input supply range , and has excellent load and line regul ation. It has an internal 2ms-to-4ms so ftstart that prevents inrush current at start-up, and compensates for output l ine drop. MP24971 achieves a low EMI si gnature with well-controlled switching edges. It has fault-condition protectio ns including hiccup-mode current limit protection, shortcircuit protection, ou tput over-voltage protection, and therm al shutdown. The MP24971 requires a min imal number of readily-available standa rd external components, and is availabl e in SOIC8 and SOIC8E packages. FEATUR ES  Wide 8V-to-50V Operating Input R ange  Output Over-Voltage Protection  5V Fixed Output  0.4Ω In.

Keywords: MP24971, datasheet, pdf, MPS, Step-Down, Converter, stock, pinout, distributor, price, schematic, inventory, databook, Electronic, Components, Parameters, parts, cross reference, chip, Semiconductor, circuit, Electric, manual, substitute, Equivalent

The Future of Analog IC Technology
MP24971
1.5A, 50V, 100kHz, 5V Fixed Output Step-
Down Converter with Programmable Current
Limit and Output Line-Drop Compensation
DESCRIPTION
The MP24971 is a monolithic, step-down,
switch-mode converter with a programmable
output-current limit. It has a fixed 5V/1.5A
continuous output over a wide input supply
range, and has excellent load and line
regulation. It has an internal 2ms-to-4ms soft-
start that prevents inrush current at start-up,
and compensates for output line drop.
MP24971 achieves a low EMI signature with
well-controlled switching edges.
It has fault-condition protections including
hiccup-mode current limit protection, short-
circuit protection, output over-voltage
protection, and thermal shutdown.
The MP24971 requires a minimal number of
readily-available standard external components,
and is available in SOIC8 and SOIC8E
packages.
FEATURES
Wide 8V-to-50V Operating Input Range
Output Over-Voltage Protection
5V Fixed Output
0.4Internal Power MOSFET
Internal 4ms Soft-Start
Stable with Low-ESR Ceramic Output
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 Power Adapters
Power Supplies 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
R1
0O
C2
2.2µF
VIN VIN
C1
220µF
C3
0.1µF
BST
MP24971
SW
VOC
C4
0.1µF
L1
33µH
C9 C8 C7
100µF 22µF 0.1µF
Diode
+
R2
402kO
GND
VOS
ISP
C5
10nF
ISN C6
10nF
R3
1kO
R4
1kO
R5
0O
RS ENSE
66mO
C10
0.1µ F
V OUT
GND
Efficiency vs.
Output Current
VOUT=5V
95
90 VIN=12V
85
80 VIN=24V
75
70
65 VIN=50V
60
55
0.1 0.3 0.5 0.7 0.9 1.1 1.3 1.5
OUTPUT CURRENT (A)
MP24971 Rev. 1.01
www.MonolithicPower.com
1/6/2012
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
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