MP2351DQ MPS [Monolithic Power Systems], MP2351DQ Datasheet

no-image

MP2351DQ

Manufacturer Part Number
MP2351DQ
Description
1.5A, 23V, 1.4MHz Step-Down Converter
Manufacturer
MPS [Monolithic Power Systems]
Datasheet
The Future of Analog IC Technology
DESCRIPTION
The MP2351 is a monolithic step down switch
mode converter with a built in internal power
MOSFET. It achieves 1.5A continuous output
current over a wide input supply range with
excellent load and line regulation.
Current mode operation provides fast transient
response and eases loop stabilization.
Fault condition protection includes cycle-by-cycle
current limiting, short circuit frequency foldback
and thermal shutdown. In shutdown mode the
regulator draws 20µA of supply current.
The MP2351 requires a minimum number of
readily available standard external components.
EVALUATION BOARD REFERENCE
TYPICAL APPLICATION
MP2351 Rev. 1.5
1/6/2006
AUTOMATIC
4.75V - 23V
NOT USED
STARTUP
EV2351DQ-00A
Board Number
INPUT
OPEN
OPEN
10
9
EN
SYNC
GND
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
IN
4
6
OPEN
MP2351
2.3”X x 1.5”Y x 0.5”Z
C6
Dimensions
COMP
BS
2
8
SW
FB
C3
1nF
10nF
C5
5
7
© 2006 MPS. All Rights Reserved.
www.MonolithicPower.com
TM
TM
D1
B220A
FEATURES
APPLICATIONS
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
1.5A Output Current
0.18Ω Internal Power MOSFET Switch
Stable with Low ESR Output Ceramic
Capacitors
Up to 93% Efficiency
20µA Shutdown Mode
Fixed 1.4MHz Frequency
Thermal Shutdown
Cycle-by-Cycle Over Current Protection
Wide 4.75V to 23V Operating Input Range
Output Adjustable from 1.23V to 16V
Programmable Under Voltage Lockout
Frequency Synchronization Input
Available in QFN (3mm x 3mm) and tiny
10-Pin MSOP Packages
Evaluation Board Available
Distributed Power Systems
Battery Charger
DSL Modems
Pre-Regulator for Linear Regulators
MP2351_TAC_S01
V
3.3V/1.5A
OUT
100
90
80
70
60
50
40
Step-Down Converter
0
Efficiency vs
Load Current
V
OUT
1.5A, 23V, 1.4MHz
300
LOAD CURRENT (mA)
=5V
600
V
MP2351
OUT
=3.3V
900
V
OUT
1200
=2.5V
MP2351-EC01
1500
1

Related parts for MP2351DQ

MP2351DQ Summary of contents

Page 1

The Future of Analog IC Technology DESCRIPTION The MP2351 is a monolithic step down switch mode converter with a built in internal power MOSFET. It achieves 1.5A continuous output current over a wide input supply range with excellent load and ...

Page 2

... ON BACKSIDE CONNECT TO GROUND (PIN 6) Part Number* Package MP2351DQ QFN10 (3mm x 3mm) * For Tape & Reel, add suffix –Z (eg. MP2351DQ–Z) For Lead Free, add suffix –LF (eg. MP2351DQ –LF–Z) ABSOLUTE MAXIMUM RATINGS Supply Voltage (V )..................................... 25V IN Switch Voltage (V ).................................... 26V SW Bootstrap Voltage (V ) ....................... V BS Feedback Voltage (V ) .................– ...

Page 3

TM ELECTRICAL CHARACTERISTICS V = 12V +25°C, unless otherwise noted Parameter Maximum Duty Cycle Minimum On Time EN Shutdown Threshold Voltage Enable Pull Up Current EN UVLO Threshold Rising EN UVLO Threshold Hysteresis Supply Current (Shutdown) ...

Page 4

TM OPERATION The MP2351 is a current mode regulator. That is, the COMP pin voltage is proportional to the peak inductor current. At the beginning of a cycle: the upper transistor M1 is off; the lower transistor M2 is on; ...

Page 5

TM APPLICATION INFORMATION COMPONENT SELECTION Setting the Output Voltage The output voltage is set using a resistive voltage divider from the output voltage to FB pin. The voltage divider divides the output voltage down to the feedback voltage by the ...

Page 6

TM The input capacitor can be electrolytic, tantalum or ceramic. When using electrolytic or tantalum capacitors, a small, high quality ceramic capacitor, i.e. 0.1µF, should be placed as close to the IC as possible. When using ceramic capacitors, make sure ...

Page 7

TM In this case, a third pole set by the compensation capacitor (C6) compensation resistor (R3) compensate the effect of the ESR zero on the loop gain. This pole is located at π × × ...

Page 8

TM PACKAGE INFORMATION Pin 1 Identif ication 2.95 3.05 0.0197(0.500)TYP 10 PIN 1 IDENT. 1 0.032(0.800) 0.044(1.100) 0.008(0.200)REF NOTICE: The information in this document is subject to change without notice. Please contact MPS for current specifications. Users should warrant and ...

Related keywords