Step-Up Converter
for Handheld Applications
Package Information
For the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages. Note that a “+”, “#”,
or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing
pertains to the package regardless of RoHS status.
PACKAGE TYPE
PACKAGE CODE
OUTLINE NO.
21-0459
LAND PATTERN NO.
9 WLP
W91B1+7
Refer to Application Note 1891
E
PIN 1
INDICATOR
MARKING
COMMON DIMENSIONS
A3
0.64
0.19
A
A1
A2
A3
b
0.05
0.03
A1
1
0.45
REF
D
A2
AAAA
A
A
0.025
BASIC
0.03
0.05
S
S
0.27
0.80
0.80
0.40
0.00
0.00
D1
E1
e
See Note 7
SIDE VIEW
BASIC
BASIC
BASIC
TOP VIEW
SD
SE
E1
SE
e
E
D
DEPOPULATED
BUMPS
MAX
MIN
1.22
1.56
1.42
1.45
MIN
1.22
1.38
1.33
1.44
MAX
PKG. CODE
W91B1+7
W91C1+1
W91F1+1
W91G1+1
C
B
B
SD
NONE
1.30
1.63
1.45
1.48
1.30
1.45
1.36
1.47
D1
NONE
NONE
NONE
A
1
2
3
b
M
S
AB
0.05
A
BOTTOM VIEW
NOTES:
1. Terminal pitch is defined by terminal center to center value.
2. Outer dimension is defined by center lines between scribe lines.
3. All dimensions in millimeter.
4. Marking shown is for package orientation reference only.
5. Tolerance is ± 0.02 unless specified otherwise.
6. All dimensions apply to PbFree (+) package codes only.
7. Front - side finish can be either Black or Clear.
TITLE
PACKAGE OUTLINE
9 BUMPS, WLP PKG. 0.4mm PITCH
REV.
APPROVAL
DOCUMENT CONTROL NO.
1
- DRAWING NOT TO SCALE -
1
21-0459
D
14 _____________________________________________________________________________________
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
