MP2161A
2A, 6V, 1.5MHz, 17μA IQ, COT
Synchronous Step-Down Converter
in 8-pin TSOT23
The Future of Analog IC Technology
FEATURES
DESCRIPTION
The MP2161A is a monolithic, step-down,
switch-mode converter with built-in internal
power MOSFETs. It achieves a 2A continuous
output current from a 2.5V to 6V input voltage
range with excellent load and line regulation. The
output voltage is regulated as low as 0.6V.
The constant-on-time (COT) control scheme
provides fast transient response and eases loop
stabilization. Fault condition protection includes
cycle-by-cycle current limiting and thermal
shutdown.
The MP2161A is available in a small TSOT23-8
package and requires a minimum number of
readily available, standard, external components.
The MP2161A is ideal for a wide range of
applications including high performance DSPs,
FPGAs, PDAs, and portable instruments.
Very Low IQ: 17μA
Default 1.5MHz Switching Frequency
1.5% VFB Accuracy
EN and Power Good for Power Sequencing
Wide 2.5V to 6V Operating Input Range
Output Adjustable from 0.6V
Up to 2A Output Current
100% Duty Cycle in Dropout
110mΩ and 60mΩ Internal Power MOSFET
Switches
Cycle-by-Cycle Over-Current Protection
Short-Circuit Protection with Hiccup Mode
Stable with Low ESR Output Ceramic
Capacitors
Available in a TSOT23-8 Package
APPLICATIONS
Wireless/Networking Cards
Portable Instruments
Battery Powered Devices
Low Voltage I/O System Power
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” and “The Future of Analog IC Technology” are registered trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
L1
1 H
VIN
2.5V to 6V
VIN
C1
10 F
VOUT
1.2V/ 2A
SW
OUT
MP2161A
EN
EN
PG
PG
R1
200k
C2
10 F
FB
AGND PGND
R2
200k
MP2161A Rev. 1.1
www.MonolihicPower.com
2/12/2019
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2019 MPS. All Rights Reserved.
1
MP2161A – 2A, 6V, 1.5MHz SYNCHRONOUS STEP-DOWN CONVERTER
ORDERING INFORMATION
Part Number*
Package
Top Marking
MP2161AGJ
TSOT23-8
See Below
* For Tape & Reel, add suffix –Z (e.g. MP2161AGJ–Z)
TOP MARKING
AKR: Product code of MP2161AGJ
Y: Year code
PACKAGE REFERENCE
TOP VIEW
PG
1
8
EN
VIN
2
7
FB
SW
3
6
AGND
PGND
4
5
OUT
TSOT23-8
MP2161A Rev. 1.1
www.MonolihicPower.com
2/12/2019
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2019 MPS. All Rights Reserved.
2
MP2161A – 2A, 6V, 1.5MHz SYNCHRONOUS STEP-DOWN CONVERTER
ABSOLUTE MAXIMUM RATINGS (1)
Supply voltage (VIN) ..................................... 6.5V
VSW .......................................................................
-0.3V (-1.5V for
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