20BQ030 查看數據表（PDF） - Monolithic Power Systems
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20BQ030 Datasheet PDF : 11 Pages
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The Future of Analog IC Technology
DESCRIPTION
The MP1591 is a high voltage step-down
converter ideal for automotive power adapter
battery chargers. Its wide 6.5V to 32V input
voltage range covers the automotive battery’s
requirements and it achieves 2A continuous
output for quick charge capability.
Current mode operation provides fast transient
response and eases loop stabilization. Fault
protection includes cycle-by-cycle current
limiting and thermal shutdown. In shutdown
mode, the converter draws only 20µA of supply
current.
The MP1591 requires a minimum number of
readily available external components to
complete a 2A step-down DC to DC converter
solution.
EVALUATION BOARD REFERENCE
Board Number
EV0020
Dimensions
2.1”X x 1.4”Y x 0.5”Z
MP1591
2A, 32V, 330KHz
Step-Down Converter
FEATURES
• Wide 6.5V to 32V Input Operating Range
• 34V Absolute Maximum Input
• 2A Output Current
• 120mΩ Internal Power MOSFET Switch
• Stable with Low ESR Output Ceramic
Capacitors
• Up to 95% Efficiency
• 20µA Shutdown Mode
• Fixed 330KHz Frequency
• Thermal Shutdown
• Cycle-by-Cycle Over Current Protection
• Output Adjustable From 1.23V to 21V
• Under Voltage Lockout
• Reference Voltage Output
• Available in 8-Pin SOIC Packages
APPLICATIONS
• Automotive Power Adapters
• PDA and Cellular Phone Battery Chargers
• Distributed Power Systems
• Automotive Aftermarket Electronics
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
INPUT
6.5V to 32V
C2
10nF
OFF ON
OPEN
NOT USED
2
1
7
IN
EN
BS 3
SW
MP1591
D1
8
REF
FB 5
GND
COMP
4
6
C3
OPEN
C4
4.7nF
OUTPUT
2.5V
2A
Efficiency vs
Load Current
100
VOUT=5V
90
80
VOUT=3.3V
70
60
50
40
30
VIN=12V
20
0
0.5
1
1.5
2
LOAD CURRENT (A)
MP1591 Rev. 2.3
www.MonolithicPower.com
1
9/27/2006
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2006 MPS. All Rights Reserved.
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