MP1580HS-LF Monolithic Power Systems (MPS), MP1580HS-LF Datasheet

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MP1580HS-LF

Manufacturer Part Number
MP1580HS-LF
Description
Switching Converters, Regulators & Controllers 2A 380kHz Step-Down Converter
Manufacturer
Monolithic Power Systems (MPS)
Datasheet
1.MP1580HS-LF.pdf (10 pages)

Specifications of MP1580HS-LF

Rohs
yes
Output Voltage
21 V
Output Current
2 A
Input Voltage
4.75 V to 25 V
Switching Frequency
380 kHz
Operating Temperature Range
- 40 C to + 125 C
Mounting Style
SMD/SMT
Package / Case
SOIC-8

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The Future of Analog IC Technology
DESCRIPTION
The MP1580 is a monolithic step-down switch
mode converter with a built in internal power
MOSFET. It achieves 2A 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 and thermal shutdown. In
shutdown mode the regulator draws 23μA of
supply current.
The MP1580 requires a minimum number of
readily available standard external components. A
synchronization pin allows the part to be driven to
600KHz.
EVALUATION BOARD REFERENCE
TYPICAL APPLICATION
MP1580 Rev. 3.0
10/10/2007
4.75V to 25V
NOT USED
OFF ON
Board Number
INPUT
OPEN
EV0007
7
8
EN
SYNC
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
GND
4
2
IN
MP1580
OPEN
2.3”X x 1.5”Y x 0.5”Z
C6
Dimensions
COMP
BS
6
1
SW
FB
C3
2.2nF
10nF
C5
© 2007 MPS. All Rights Reserved.
3
5
www.MonolithicPower.com
TM
TM
D1
FEATURES
•
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APPLICATIONS
•
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“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
2A Output Current
0.18Ω Internal Power MOSFET Switch
Stable with Low ESR Output Ceramic
Capacitors
Up to 95% Efficiency
23μA Shutdown Mode
Fixed 380KHz Frequency
Thermal Shutdown
Cycle-by-Cycle Over Current Protection
Wide 4.75 to 25V Operating Input Range
Output Adjustable from 1.22V to 21V
Programmable Under Voltage Lockout
Frequency Synchronization Input
Available in an 8-Pin SO Package
Distributed Power Systems
Battery Chargers
Pre-Regulator for Linear Regulators
OUTPUT
2.5V / 2A
MP1580_TAC_S01
95
90
85
80
75
70
Step-Down Converter
0
Efficiency vs
Output Current Voltage
OUTPUT CURRENT (A)
V
V
0.5
OUT
V
OUT
OUT
= 5.0V
= 3.3V
= 2.5V
MP1580
2A, 380 KHz
1
V
IN
1.5
MP1580_TAC_EC01
= 10V
2
1

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MP1580HS-LF Summary of contents

Page 1

The Future of Analog IC Technology DESCRIPTION The MP1580 is a monolithic step-down switch mode converter with a built in internal power MOSFET. It achieves 2A continuous output current over a wide input supply range with excellent load and line ...

Page 2

... GND 4 5 MP1580_PD01-SOIC8 Part Number* Package MP1580HS SOIC8 * For Tape & Reel, add suffix –Z (eg. MP1580HS–Z) For Lead Free, add suffix –LF (eg. MP1580HS –LF–Z) ABSOLUTE MAXIMUM RATINGS Supply Voltage (V )..................................... 27V IN Switch Voltage (V ).................. – 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 Duty Cycle EN Shutdown Threshold Voltage Enable Pull-Up Current EN UVLO Threshold Rising EN UVLO Threshold Hysteresis Supply Current (Shutdown) Supply ...

Page 4

TM OPERATION The MP1580 is a current mode regulator; 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 (refer to ...

Page 5

TM APPLICATION INFORMATION COMPONENT SELECTION Sync Pin Operation The SYNC pin driving waveform should be a square wave with a rise time less than 20ns. The Minimum High voltage level is 2.7V and the Low level is less than 0.8V. ...

Page 6

TM Input Capacitor The input current to the step-down converter is discontinuous capacitor is required to supply the AC current to the step-down converter while maintaining the DC input voltage. A low ESR capacitor is required to keep ...

Page 7

TM Compensation The system stability is controlled through the COMP pin. COMP is the output of the internal transconductance error amplifier. A series capacitor-resistor combination sets a pole-zero combination to control the characteristics of the control system. The DC loop ...

Page 8

TM Determine if the second capacitor, C6, is required required if the ESR zero of the output capacitor happens at less than four times the crossover frequency. Or: π × × × ESR ...

Page 9

TM TYPICAL APPLICATION CIRCUITS INPUT 4.75V to 25V OFF ON OPEN NOT USED Figure 3—Application Circuit for -5V Supply INPUT 4.75V to 20V OFF ON OPEN NOT USED Figure 4—MP1580 with Murata 22µF/10V Ceramic Output Capacitor MP1580 Rev. 3.0 10/10/2007 ...

Page 10

TM PACKAGE INFORMATION 0.189(4.800) 0.197(5.004) 0.053(1.350) 0.068(1.730) NOTE: 1) Control dimension is in inches. Dimension in bracket is millimeters. NOTICE: The information in this document is subject to change without notice. Please contact MPS for current specifications. Users should warrant ...

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