MP2105DJ Monolithic Power Systems, MP2105DJ Datasheet

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MP2105DJ

Manufacturer Part Number
MP2105DJ
Description
1mhz, 800ma Synchronous Step-down Converter
Manufacturer
Monolithic Power Systems
Datasheet
1.MP2105DJ.pdf (8 pages)

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The Future of Analog IC Technology
DESCRIPTION
The MP2105 is a 1MHz constant frequency,
current mode, PWM step-down converter. The
device integrates a main switch and a
synchronous rectifier for high efficiency without
an external Schottky diode. It is ideal for
powering portable equipment that runs from a
single cell Lithium-Ion (Li+) battery. The
MP2105 can supply 800mA of load current from
a 2.5V to 6V input voltage. The output voltage
can be regulated as low as 0.6V. The MP2105
can also run at 100% duty cycle for low dropout
applications.
The MP2105 is available in a low profile (1mm)
5-pin, TSOT package.
EVALUATION BOARD REFERENCE
TYPICAL APPLICATION
MP2105 Rev. 1.3
5/11/2006
2.5V to 6V
Board Number
EV2105DJ-00A
OFF ON
INPUT
4
1
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
IN
EN
2.0”X x 2.0”Y x 0.5”Z
MP2105
GND
Dimensions
2
SW
FB
3
5
© 2006 MPS. All Rights Reserved.
www.MonolithicPower.com
TM
TM
FEATURES
•
•
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•
•
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APPLICATIONS
•
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“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
OUTPUT
1.8V
800mA
MP2105_TAC_S01
High Efficiency: Up to 95%
1MHz Constant Switching Frequency
800mA Available Load Current
2.5V to 6V Input Voltage Range
Output Voltage as Low as 0.6V
100% Duty Cycle in Dropout
Current Mode Control
Short Circuit Protection
Thermal Fault Protection
<0.1µA Shutdown Current
Space Saving 5-Pin TSOT23 Package
Cellular and Smart Phones
Microprocessors and DSP Core Supplies
PDAs
MP3 Players
Digital Still and Video Cameras
Portable Instruments
1MHz, 800mA Synchronous
100
90
80
70
60
50
40
30
20
10
0
10
Efficiency vs
Load Current
Step-Down Converter
V
IN
= 3.3V
LOAD CURRENT (mA)
V
IN
= 4.2V
100
MP2105
MP2105-EC01
1000
1

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MP2105DJ Summary of contents

Page 1

The Future of Analog IC Technology DESCRIPTION The MP2105 is a 1MHz constant frequency, current mode, PWM step-down converter. The device integrates a main switch and a synchronous rectifier for high efficiency without an external Schottky diode ideal ...

Page 2

... GND MP2105_PD01_TSOT23-5 Part Number* Package MP2105DJ TSOT23-5 * For Tape & Reel, add suffix –Z (eg. MP2105DJ–Z) For Lead Free, add suffix –LF (eg. MP2105DJ–LF–Z) ELECTRICAL CHARACTERISTICS 3.6V +25°C, unless otherwise noted Parameter Symbol Condition Supply Current ...

Page 3

TM MP2105 – 1MHz 800mA SYNCHRONOUS STEP-DOWN CONVERTER TYPCIAL PERFORMANCE CHARACTERISTICS V = 3.3V 1.8V 4.7µ 4.7µ 10µ OUT 100 V =3. =4. ...

Page 4

TM MP2105 – 1MHz 800mA SYNCHRONOUS STEP-DOWN CONVERTER TYPCIAL PERFORMANCE CHARACTERISTICS V = 3.3V 1.8V 4.7µ 4.7µ 10µ OUT Heavy Load Operation I = 800mA OUT V OUT 10mV/div. I ...

Page 5

TM MP2105 – 1MHz 800mA SYNCHRONOUS STEP-DOWN CONVERTER OPERATION The MP2105 is a constant frequency current mode PWM step-down converter. The MP2105 is optimized for low voltage, Li-Ion battery powered applications where high efficiency and small size are critical. The ...

Page 6

TM MP2105 – 1MHz 800mA SYNCHRONOUS STEP-DOWN CONVERTER Current Mode PWM Control Slope compensated current mode PWM control provides stable switching and cycle-by-cycle current limit for superior load and line response and protection of the internal main switch and synchronous ...

Page 7

TM MP2105 – 1MHz 800mA SYNCHRONOUS STEP-DOWN CONVERTER Table 2—Suggested Surface Mount Inductors Manufacturer Part Number Coilcraft D01605T-472 Toko D52LC Sumida CR43-4R7 Table 3—Inductors for Improved Efficiency at 25mA, 50mA, under 100mA Load. Manufacturer Part Number Coilcraft DO1605T-103MX Murata LQH4C100K04 ...

Page 8

TM MP2105 – 1MHz 800mA SYNCHRONOUS STEP-DOWN CONVERTER PACKAGE INFORMATION NOTICE: The information in this document is subject to change without notice. Please contact MPS for current specifications. Users should warrant and guarantee that third party Intellectual Property rights are ...

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