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BD8112EFV-M
Technical Note
20. SW
21. OUTH
22. CS
Vcc
BOOT
BOOT
Vcc
5K
CS
SW
100K
OUTH
23. BOOT
VREG
BOOT
SW
24. VREG
SW
VREG
SW
Vcc
VREG
205K
100K
SW
*All values typical.
● Notes for use
1. Absolute maximum ratings
We are careful enough for quality control about this IC. So, there is no problem under normal operation, excluding that it
exceeds the absolute maximum ratings. However, this IC might be destroyed when the absolute maximum ratings, such
as impressed voltages or the operating temperature range (Topr) is exceeded, and whether the destruction is short circuit
mode or open circuit mode cannot be specified. Please take into consideration the physical countermeasures for safety,
such as fusing, if a particular mode that exceeds the absolute maximum rating is assumed.
2. Reverse polarity connection
Connecting the power line to the IC in reverse polarity (from that recommended) will damage the part. Please utilize the
direction protection device as a diode in the supply line.
3. Power supply line
Due to return of regenerative current by reverse electromotive force, using electrolytic and ceramic suppress filter
capacitors (0.1μF) close to the IC power input terminals (Vcc and GND) are recommended. Please note the electrolytic
capacitor value decreases at lower temperatures and examine to dispense physical measures for safety.
And, for ICs with more than one power supply, it is possible that rush current may flow instantaneously due to the internal
powering sequence and delays. Therefore, give special consideration to power coupling capacitance, width of power
wiring, GND wiring, and routing of wiring. Please make the power supply lines (where large current flow) wide enough to
reduce the resistance of the power supply patterns, because the resistance of power supply pattern might influence the
usual operation.
4. GND line
The ground line is where the lowest potential and transient voltages are connected to the IC.
5. Thermal design
Do not exceed the power dissipation (Pd) of the package specification rating under actual operation, and please design
enough temperature margins.
6. Short circuit mode between terminals and wrong mounting
Do not mount the IC in the wrong direction and be careful about the reverse-connection of the power connector.
Moreover, this IC might be destroyed when the dust short the terminals between them or power supply, GND.
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? 2010 ROHM Co., Ltd. All rights reserved.
20/22
2011.08 - Rev.C
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