IR3894 IRF [International Rectifier], IR3894 Datasheet - Page 42

• Manufacturer Part Number: IR3894
• Description: 12A HIGHLY INTERGRATED SUPLRBUCK
• Manufacturer: IRF [International Rectifier]

STENCIL DESIGN
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 Stencils for PQFN can be used with thicknesses
of 0.100‐0.250mm (0.004‐0.010"). Stencils thinner
than 0.100mm are unsuitable because they
deposit insufficient solder paste to make good
solder joints with the ground pad; high reductions
sometimes create similar problems. Stencils in
the range of 0.125mm‐0.200mm (0.005‐0.008"),
with suitable reductions, give the best results.
42
AUGUST 08, 2012 | DATA SHEET | Rev 3.1
Figure 50: Stencil Pad Spacing (all dimensions in mm)
Single‐Input Voltage, Synchronous Buck Regulator
- 42 -`
12A Highly Integrated SupIRBuck
 Evaluations have shown that the best overall
performance is achieved using the stencil design
shown in following figure. This design is for
a stencil thickness of 0.127mm (0.005").
The reduction should be adjusted for stencils
of other thicknesses.
IR3894
PD‐97745