B340L

Manufacturer Part NumberB340L
Description2A, 32V, 330KHz Step-Down Converter
ManufacturerMPS [Monolithic Power Systems]
B340L datasheet
 


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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
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
complete a 2A step-down DC to DC converter
solution.
EVALUATION BOARD REFERENCE
Board Number
Dimensions
EV0020
2.1”X x 1.4”Y x 0.5”Z
TYPICAL APPLICATION
INPUT
6.5V to 32V
2
IN
7
OFF ON
EN
MP1591
8
OPEN
REF
NOT USED
GND
4
C3
OPEN
MP1591 Rev. 2.3
9/27/2006
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
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
current
Fixed 330KHz Frequency
Thermal Shutdown
Cycle-by-Cycle Over Current Protection
Output Adjustable From 1.23V to 21V
Under Voltage Lockout
Reference Voltage Output
components
to
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.
C2
10nF
1
OUTPUT
BS
3
2.5V
SW
2A
D1
5
FB
COMP
6
C4
4.7nF
www.MonolithicPower.com
© 2006 MPS. All Rights Reserved.
MP1591
2A, 32V, 330KHz
Step-Down Converter
Efficiency vs
Load Current
100
V
=5V
OUT
90
V
=3.3V
80
OUT
70
60
50
40
V
=12V
30
IN
20
0
0.5
1
1.5
2
LOAD CURRENT (A)
1

B340L Summary of contents

  • Page 1

    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 ...

  • Page 2

    PACKAGE REFERENCE TOP VIEW GND 4 5 EXPOSED PAD ON BACKSIDE (SOIC8N ONLY) CONNECT TO PIN 4 Part Number* Package MP1591DN SOIC8E MP1591DS SOIC8 * For Tape & Reel, add suffix ...

  • Page 3

    ELECTRICAL CHARACTERISTICS V = 12V +25°C, unless otherwise noted Parameter (4) Thermal Shutdown REF Voltage (4) REF Load Regulation (4) REF Line Regulation Notes: 4) These parameters are guaranteed by design, not production tested. 5) Equivalent ...

  • Page 4

    OPERATION The MP1591 is a current mode step-down regulator. It regulates input voltages from 6.5V to 32V down to an output voltage as low as 1.230V and is able to supply load current. The MP1591 uses ...

  • Page 5

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

  • Page 6

    ... B220 1 B320 SK23 6 SK33 SR22 6 SS32 20BQ030 4 B330 B230 1 B340L SK23 6 MBRD330 SR23 3, 6 SK33 SS23 2, 3 SS33 21DQ04 4 B340L MBRS240L 5 MBRS340 SK24 6 SK34 SS24 2, 3 SS34 Web Site www.diodes.com www.fairchildsemi.com www.gensemi.com www.irf.com www.onsemi.com www.panjit.com.tw Vendor ...

  • Page 7

    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 gain ...

  • Page 8

    To optimize the compensation components that are not listed in Table 4, use the following procedure. Choose the compensation resistor to set the desired crossover frequency. Determine the value by the following equation: π × × ...

  • Page 9

    TYPICAL APPLICATION CIRCUITS INPUT 6.5V to 32V OFF ON OPEN NOT USED Figure 3—MP1591 with Murata 22µF / 10V Ceramic Output Capacitor INPUT 6.5V to 32V OFF ON OPEN NOT USED Figure 4—MP1591 with Panasonic 47µF / 6.3V Special Polymer ...

  • Page 10

    PACKAGE INFORMATION 0.189(4.80) 0.197(5.00 PIN TOP VIEW 0.013(0.33) 0.020(0.51) 0.050(1.27) BSC FRONT VIEW 0.010(0.25) 0.020(0.50) GAUGE PLANE 0.010(0.25) BSC 0.016(0.41 0.050(1.27) DETAIL "A" MP1591 Rev. 2.3 9/27/2006 MPS Proprietary Information. ...

  • Page 11

    PIN TOP VIEW 0.013(0.33) 0.020(0.51) 0.050(1.27) BSC FRONT VIEW 0.050(1.27) 0.024(0.61) 0.063(1.60) 0.138(3.51) RECOMMENDED LAND PATTERN NOTICE: The information in this document is subject to change without notice. Users should warrant and ...