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MIC26903-ZAYJL-TR

P1-P3P4-P6P7-P9P10-P12P13-P14
MP28265 – 5A, 21V, SYNCHRONOUS STEP-DOWN CONVERTER WITH INTERNAL MOSFETS
MP28265 Rev. 0.92 www.MonolithicPower.com 13
12/2/2009 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2009 MPS. All Rights Reserved.
External Bootstrap Diode
An external bootstrap diode may enhance the
efficiency of the regulator, the applicable
conditions of external BST diode is:
z Duty cycle is high: D=
IN
OUT
V
V
>65%
In this case, an external BST diode is
recommended from the VCC pin to BST pin, as
shown in Figure 8
SW
BST
MP28265
C
L
BST
C
OUT
External BST Diode
VCC
IN4148
Figure 8—Add Optional External Bootstrap
Diode to Enhance Efficiency
The recommended external BST diode is
IN4148, and the BST cap is 0.1~1µF.
MP28265 – 5A, 21V, SYNCHRONOUS STEP-DOWN CONVERTER WITH INTERNAL MOSFETS
NOTICE: The information in this document is subject to change without notice. Users should warrant and guarantee that third
party Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not
assume any legal responsibility for any said applications.
MP28265 Rev. 0.92 www.MonolithicPower.com 14
12/2/2009 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2009 MPS. All Rights Reserved.
PACKAGE INFORMATION
3mm x 4mm QFN14
SIDE VIEW
TOP VIEW
1
14
8
7
BOTTOM VIEW
2.90
3.10
1.60
1.80
3.90
4.10
3.20
3.40
0.50
BSC
0.18
0.30
0.80
1.00
0.00
0.05
0.20 REF
PIN 1 ID
MARKING
1.70
0.50
0.25
RECOMMENDED LAND PATTERN
2.90
NOTE:
1) ALL DIMENSIONS ARE IN MILLIMETERS.
2) EXPOSED PADDLE SIZE DOES NOT INCLUDE MOLD FLASH.
3) LEAD COPLANARITY SHALL BE 0.10 MILLIMETER MAX.
4) JEDEC REFERENCE IS MO-229, VARIATION VGED-3.
5) DRAWING IS NOT TO SCALE.
PIN 1 ID
SEE DETAIL A
3.30
0.70
PIN 1 ID OPTION B
R0.20 TYP.
PIN 1 ID OPTION A
0.30x45º TYP.
DETAIL A
0.30
0.50
PIN 1 ID
INDEX AREA
P1-P3P4-P6P7-P9P10-P12P13-P14

MIC26903-ZAYJL-TR

Mfr. #:
Buy MIC26903-ZAYJL-TR
Manufacturer:
Microchip Technology / Micrel
Description:
Switching Voltage Regulators 28V/9A DC-DC Buck Regulator w/ HLL
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
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