TM
MP1580
2A, 380 KHz
Step-Down Converter
TM
The Future of Analog IC Technology
DESCRIPTION FEATURES
The MP1580 is a monolithic step-down switch
" 2A Output Current
mode converter with a built in internal power
" 0.18&! Internal Power MOSFET Switch
MOSFET. It achieves 2A continuous output
" Stable with Low ESR Output Ceramic
current over a wide input supply range with
Capacitors
excellent load and line regulation.
" Up to 95% Efficiency
" 23µA Shutdown Mode
Current mode operation provides fast transient
" Fixed 380KHz Frequency
response and eases loop stabilization.
" Thermal Shutdown
Fault condition protection includes cycle-by-cycle
" Cycle-by-Cycle Over Current Protection
current limiting and thermal shutdown. In
" Wide 4.75 to 25V Operating Input Range
shutdown mode the regulator draws 23µA of
" Output Adjustable from 1.22V to 21V
supply current.
" Programmable Under Voltage Lockout
The MP1580 requires a minimum number of
" Frequency Synchronization Input
readily available standard external components. A
" Available in an 8-Pin SO Package
synchronization pin allows the part to be driven to
600KHz. APPLICATIONS
" Distributed Power Systems
EVALUATION BOARD REFERENCE
" Battery Chargers
Board Number Dimensions
" Pre-Regulator for Linear Regulators
EV0007 2.3 X x 1.5 Y x 0.5 Z
 MPS and  The Future of Analog IC Technology are Trademarks of Monolithic
Power Systems, Inc.
TYPICAL APPLICATION
Efficiency vs
C5
10nF Output Current Voltage
INPUT
95
4.75V to 25V VOUT = 5.0V
2 1
IN BS
90
VOUT = 3.3V
7 3
OUTPUT
OFF ON EN SW
2.5V / 2A
D1
MP1580 VOUT = 2.5V
85
8
5
OPEN
SYNC FB
NOT USED
GND COMP
80
4 6
C3
75
2.2nF
C6
OPEN
VIN = 10V
70
0 0.5 1 1.5 2
OUTPUT CURRENT (A)
MP1580_TAC_S01
MP1580_TAC_EC01
MP1580 Rev. 2.9w www.MonolithicPower.com 1
8/11/2005 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2005 MPS. All Rights Reserved.
EFFICIENCY (%)