MP2151 Datasheet: Sync Step-Down Converter





MP2151 Sync Step-Down Converter Datasheet

Part Number MP2151
Description Sync Step-Down Converter
Manufacture MPS
Total Page 21 Pages
PDF Download Download MP2151 Datasheet PDF

Features: MP2151 5.5V, 1A, Synchronous Step-Down C onverter with 25μA IQ and Output Disch arge in an Ultra-Small Package DESCRIP TION The MP2151 is a monolithic, step-d own, switchmode converter with built-in , internal power MOSFETs. The MP2151 ac hieves 1A of continuous output current from a 2.5V to 5.5V input voltage with excellent load and line regulation. The output voltage can be regulated as low as 0.6V. The constant-on-time (COT) co ntrol scheme provides fast transient re sponse and eases loop stabilization. Fu ll protection features include cycle-by -cycle current limiting and thermal shu tdown. The MP2151 is ideal for a wide r ange of applications including high-per formance DSPs, wireless power, portable and mobile devices, and other low-powe r systems. The MP2151 requires a minima l number of readily available, standard , external components and is available in ultra-small SOT563 or UTQFN (1.2mmx1 .6mm) packages. FEATURES  Low IQ: 2 5μA  1.1MHz Switching Frequency  EN for Power Sequencing  1% FB.

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MP2151
5.5V, 1A, Synchronous Step-Down Converter
with 25μA IQ and Output Discharge
in an Ultra-Small Package
DESCRIPTION
The MP2151 is a monolithic, step-down, switch-
mode converter with built-in, internal power
MOSFETs. The MP2151 achieves 1A of
continuous output current from a 2.5V to 5.5V
input voltage with excellent load and line
regulation. The output voltage can be regulated
as low as 0.6V.
The constant-on-time (COT) control scheme
provides fast transient response and eases loop
stabilization. Full protection features include
cycle-by-cycle current limiting and thermal
shutdown.
The MP2151 is ideal for a wide range of
applications including high-performance DSPs,
wireless power, portable and mobile devices,
and other low-power systems.
The MP2151 requires a minimal number of
readily available, standard, external
components and is available in ultra-small
SOT563 or UTQFN (1.2mmx1.6mm) packages.
FEATURES
Low IQ: 25μA
1.1MHz Switching Frequency
EN for Power Sequencing
1% FB Accuracy
Wide 2.5V to 5.5V Operating Input Range
Output Adjustable from 0.6V
Up to 1A Output Current
80mΩ and 50mΩ Internal Power MOSFET
Switches
100% Duty On
Output Discharge
Output Over-Voltage Protection (OVP)
Short-Circuit Protection (SCP) with Hiccup
Mode
Power Good (PG) only for Fixed Output
Version
Available in a SOT563 or UTQFN
(1.2mmx1.6mm) Package
APPLICATIONS
Wireless/Networking Cards
Portable Instruments
Battery-Powered Devices
Low-Voltage I/O System Power
Multi-Function Printers
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
5V
VIN SW
C1
10μF
OUT
MP2151
EN EN FB
GND
L1
1μH
R1
200k
R2
200k
VOUT
1.2V/1A
C2
10μF
Adjustable Output Reversion
Efficiency vs. Output Current
VIN = 5V, L1 = 1µH (DCR = 27mΩ)
100
95
90
85
80
Vo=3.3V
75
Vo=1.2V
70 Vo=1.8V
65 Vo=2.5V
60
0.001
0.010
0.100
IO(A)
1.000
MP2151 Rev. 1.0
1/7/2019
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2019 MPS. All Rights Reserved.
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