BD9870FPS_09 ROHM [Rohm], BD9870FPS_09 Datasheet - Page 9

• Manufacturer Part Number: BD9870FPS_09
• Description: Simple Step-down Switching Regulator with Built-in Power MOSFET
• Manufacturer: ROHM [Rohm]

●I/O Equivalent Circuit
●Operation Notes
BD9870FPS
© 2009 ROHM Co., Ltd. All rights reserved.
www.rohm.com
VCC
GND
1. Absolute Maximum Ratings
2. Application circuit
3. Operating conditions
4. GND voltage
5. Input supply voltage
6. Thermal design
7. Soldering
8. Operation in strong electromagnetic field
9. Operation
Exceeding the absolute maximum ratings (i.e. supply voltage, temperature) may cause damage to the device and make it
impossible to determine the failure mode (short/open). Therefore, when conditions exceeding the maximum ratings are
anticipated, consideration should be given to preventive countermeasures (e.g. fuses).
Although we can recommend the application circuits contained herein with a relatively high degree of confidence, we ask
that you verify all characteristics and specifications of the circuit as well as performance under actual conditions. Please
note that we cannot be held responsible for problems that may arise due to patent infringements or noncompliance with
any and all applicable laws and regulations.
Proper operation is guaranteed under the recommended conditions/specifications.
Ensure that the GND fin is connected and is at the lowest potential under any operating conditions, including transients.
Ensure that the Vcc pin is connected to the supply voltage.
Thermal designs should allow for sufficient margin for power dissipation under actual use.
During mounting ensure that the OUT, Vcc, and GND pins are not shorted with one another. Carefully note IC orientation.
Operation in a strong electromagnetic field may cause malfunction.
The IC will turn ON when the voltage at the STBY pin is greater than 2.0V and will switch OFF if under 0.3V.
Therefore, do not input voltages between 0.3V and 2.0V. Malfunctions and/or physical damage may occur..
Pin 1 (Vcc, GND)
OUT
Pin 2 (OUT)
VCC
9/11
INV
Pin 4 (INV)
VCC
STBY
Pin 5 (STBY)
Technical Note
2009.05 - Rev.A
VCC