MP24971DS-LF-Z Datasheet, PDF (1/14 Pages) MPS Industries, Inc. – 1.5A, 50V, 100kHz, 5V Fixed Output Step- Down Converter with Programmable Current Limit and Output Line-Drop Compensation

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
 0.4Ω Internal 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
BST
SW
2.2µF
VIN
VIN
C1
220µF
C3
0.1µF
VOC
MP24971
C4
0.1µF
L1
33µH
C9
C8 C7
100µF 22µF 0.1µF
+
Diode
R2
402kO
ISP
GND
C5
10nF
R3
1kO
VOS
ISN
C6
R4
10nF
1kO
R5
0O
RS ENSE
66mO
C10
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
65
V_IN=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
1/6/2012
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.