MPS MP1591 Manual Download Page 10

MP1591 – 2A, 32V, 330KHz STEP-DOWN CONVERTER 

 

MP1591 Rev. 2.3 

www.MonolithicPower.com 

10

 

9/21/2007 

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. 

 

© 2007 MPS. All Rights Reserved. 

PACKAGE INFORMATION 

SOIC8 

0.016(0.41)
0.050(1.27)

0

o

-8

o

DETAIL "A"

0.010(0.25)
0.020(0.50)

x 45

o

SEE DETAIL "A"

0.0075(0.19)
0.0098(0.25)

0.150(3.80)
0.157(4.00)

PIN 1 ID

0.050(1.27)
BSC

0.013(0.33)
0.020(0.51)

SEATING PLANE

0.004(0.10)
0.010(0.25)

0.189(4.80)
0.197(5.00)

0.053(1.35)
0.069(1.75)

TOP VIEW

FRONT VIEW

0.228(5.80)
0.244(6.20)

SIDE VIEW

1

4

8

5

RECOMMENDED LAND PATTERN

0.213(5.40)

0.063(1.60)

0.050(1.27)

0.024(0.61)

NOTE:

  1) CONTROL DIMENSION IS IN INCHES.  DIMENSION IN
      BRACKET IS IN MILLIMETERS.
  2) PACKAGE LENGTH DOES NOT INCLUDE MOLD FLASH,
      PROTRUSIONS OR GATE BURRS.
  3) PACKAGE WIDTH DOES NOT INCLUDE INTERLEAD FLASH
      OR PROTRUSIONS.
  4) LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING)
      SHALL BE 0.004" INCHES MAX.
  5) DRAWING CONFORMS TO JEDEC MS-012, VARIATION AA.
  6) DRAWING IS NOT TO SCALE.

0.010(0.25) BSC

GAUGE PLANE

Summary of Contents for MP1591

Page 1: ...DC to DC converter solution EVALUATION BOARD REFERENCE Board Number Dimensions EV0020 2 1 X x 1 4 Y x 0 5 Z FEATURES Wide 6 5V to 32V Input Operating Range 34V Absolute Maximum Input 2A Output Curren...

Page 2: ...anteed to function outside of its operating conditions 3 Measured on approximately 1 square of 1 oz copper ELECTRICAL CHARACTERISTICS VIN 12V TA 25 C unless otherwise noted Parameter Symbol Condition...

Page 3: ...5V to 32V power source Bypass IN to GND with a suitably large capacitor to eliminate noise on the input to the IC See Input Capacitor 3 SW Power Switching Output SW is the switching node that supplies...

Page 4: ...gulation control system The voltage at COMP is compared to the switch current measured internally to control the output voltage The converter uses an internal N Channel MOSFET switch to step down the...

Page 5: ...o peak ripple current in the inductor to be approximately 30 of the maximum load current that the IC can provide Also make sure that the peak inductor current the load current plus half the peak to pe...

Page 6: ...stimated to be 2 SW LC IN RIPPLE f f V 4 1 V Where VRIPPLE is the output ripple voltage fLC is the resonant frequency of the LC filter fSW is the switching frequency In the case of tantalum or low ESR...

Page 7: ...alue capacitors with relatively high equivalent series resistance ESR are used the zero due to the capacitance and ESR of the output capacitor can be compensated by a third pole set by R3 and C3 3 C 3...

Page 8: ...ESR zero of the output capacitor occurs at less than four times the crossover frequency or 1 f R 5 C 8 C ESR If this is the case then add the second compensation resistor Determine the value by the eq...

Page 9: ...ION CIRCUITS INPUT 6 5V to 32V OPEN NOT USED OUTPUT 2 5V 2A C4 4 7nF D1 C2 10nF MP1591 BS IN FB SW REF GND COMP EN C3 OPEN OFF ON 1 3 5 6 4 8 7 2 Figure 3 MP1591 with Murata 22 F 10V Ceramic Output Ca...

Page 10: ...SEATING PLANE 0 004 0 10 0 010 0 25 0 189 4 80 0 197 5 00 0 053 1 35 0 069 1 75 TOP VIEW FRONT VIEW 0 228 5 80 0 244 6 20 SIDE VIEW 1 4 8 5 RECOMMENDED LAND PATTERN 0 213 5 40 0 063 1 60 0 050 1 27 0...

Page 11: ...33 0 020 0 51 SEATING PLANE 0 000 0 00 0 006 0 15 0 051 1 30 0 067 1 70 TOP VIEW FRONT VIEW SIDE VIEW BOTTOM VIEW NOTE 1 CONTROL DIMENSION IS IN INCHES DIMENSION IN BRACKET IS IN MILLIMETERS 2 PACKAG...

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