MC13892BJVL Freescale Semiconductor, MC13892BJVL Datasheet - Page 12

• Manufacturer Part Number: MC13892BJVL
• Description: IC PMU I.MX51/37/35/27 186MAPBGA
• Manufacturer: Freescale Semiconductor

Specifications of MC13892BJVL

• Applications: Battery Management, Display (LED Drivers), Handheld/Mobile Devices, Power Supply
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 186-LFBGA
• Mounting Style: SMD/SMT
• Duty Cycle (max): 55 %
• Input Voltage: - 0.3 V to + 20 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 30 C
• Output Current: 30 mA
• Output Voltage: 3.3 V
• Topology: Boost
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Supply: -
• Voltage - Supply: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

6.3
The components associated with this node must be placed as close as possible to one another to assure the
switching currents are small enough not to contaminate other signals. However, care must be taken to ensure the
copper traces joining these components together on this node are capable of handling the necessary current.
Figure 13
6.4
12
13892
SWITCHING POWER SUPPLIES TRACES
shows the placement and layout philosophy for a recommended PCB:
Switching Node
Boost converter
Figure 13. Placement and Layout Philosophy for a Recommended PCB.
PCB power plane
CIN
PCB ground plane
Each one of the 4 traces must be < 1nH and < 20mΩ
Total trace must be < Lo/10 (H) and < dcr/10 (Ω)
Total trace must be < 5nH, 20mΩ,
Figure 14. Current Flow on a Boost Converter.
FB
VIN
SWGND
FB
Very noisy signal
LX
Low, DCR
High current (up to 1.3A) and High
di/dt trace (up to 500e9 A/s)
High current (up to 1.3A)
Cout
ON phase
OFF phase
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