A4407 Datasheet, PDF (28/29 Pages) Allegro MicroSystems – The A4407 is an automotive power management IC that uses a 2.2 MHz constant on-time (COT) buck pre-regulator to supply a 5 V linear regulator, a 5 V tracking/protected linear regulator,

A4407
2.2 MHz Constant On-Time Buck Regulator
With Two External and Two Internal Linear Regulators
Package LP, 24-Pin TSSOP
with Exposed Thermal Pad
7.80±0.10
24
B
A
12
24X
0.10 C
0.30
0.19
4.32 NOM
0.65 BSC
3 NOM 4.40±0.10 6.40±0.20
8º
0º
0.20
0.09
0.60 ±0.15
1.00 REF
0.65
0.45
3.00
6.10
C
SEATING
PLANE
1.20 MAX
0.15
0.00
0.25 BSC
SEATING PLANE
GAUGE PLANE
1.65
4.32
C PCB Layout Reference View
For Reference Only; not for tooling use (reference MO-153 ADT)
Dimensions in millimeters
Dimensions exclusive of mold flash, gate burrs, and dambar protrusions
Exact case and lead configuration at supplier discretion within limits shown
A Terminal #1 mark area
B Exposed thermal pad (bottom surface)
C Reference land pattern layout (reference IPC7351
TSOP65P640X120-25M); all pads a minimum of 0.20 mm from all
adjacent pads; adjust as necessary to meet application process
requirements and PCB layout tolerances; when mounting on a multilayer
PCB, thermal vias at the exposed thermal pad land can improve thermal
dissipation (reference EIA/JEDEC Standard JESD51-5)
Allegro MicroSystems, Inc.
28
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com