BD7820FP-E2 Rohm Semiconductor, BD7820FP-E2 Datasheet - Page 3

• Manufacturer Part Number: BD7820FP-E2
• Description: IC REG LDO 1A 1V TO252-5
• Manufacturer: Rohm Semiconductor
• Series: -r

Specifications of BD7820FP-E2

• Regulator Topology: Positive Adjustable
• Voltage - Output: 1 V ~ 5 V
• Voltage - Input: 2.3 V ~ 6 V
• Voltage - Dropout (typical): 0.5V @ 1A
• Number Of Regulators: 1
• Current - Output: 1A (Max)
• Current - Limit (min): 1A
• Operating Temperature: -40°C ~ 105°C
• Mounting Type: Surface Mount
• Package / Case: TO-252-5, DPak (4 Leads + Tab), TO-252AD
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

BLOCK DIAGRAM
5. Be sure to connect a capacitor between the output pin and GND to prevent oscillation. Note that if the capacity of the capacitor
1. Absolute maximum range
2. GND pin voltage
3. Power dissipation
4. Electrical characteristics described in these specifications may vary, depending on temperature, supply voltage, external circuits
6. Overcurrent protection circuit
7.
8. Mounting Failures
9. Internal circuits or elements may be damaged when Vcc and pin voltage are reversed. For example, Vcc short circuit to GND
Please refer to technical note concerning application circuit, and etc.
Absolute Maximum Ratings are those values beyond which the life of a device may be destroyed we cannot be defined the failure
mode, such as short mode or open mode.
Therefore physical security countermeasure, like fuse, is to be given when a specific mode to be beyond absolute maximum ratings is
considered.
GND terminal should be connected the lowest voltage, under all conditions. And all terminals except GND should be under GND
terminal voltage under all conditions including transient situations.
If IC is used on condition that the power loss is over the power dissipation, the reliability will become worse by heat up, such as
reduced output current capability.
Also, be sure to use this IC within a power dissipation range allowing enough of margin.
changes due to factors such as changes in temperature, oscillation may occur. A ceramic capacitor or other low ESR (2.2 F)
capacitor is recommended to prevent oscillation. Ceramic capacitors generally have thermal and DC bias characteristics to
consider. In selecting a ceramic capacitor, high voltage X5R or X7R versions or better are recommended for their superior thermal
and DC bias characteristics. However, in situations such as rapid fluctuation of the input voltage or the load, please check the
operation in real application to determine the proper capacitor.
The built-in overcurrent protection circuit is designed to respond to the output current and prevent destruction of the IC from load
A built-in internal shutdown (TSD) circuit is provided to protect the IC from heat destruction. Operation has to be done within the
allowable loss range, but in continuous use beyond the range, chip temperature Tj will increase to the threshold, activating the
TSD circuit and turning the output power Tr OFF. Once the chip temperature Tj returns to the normal range, the circuit is
automatically restored. Note that the TSD circuit is designed to operate over the maximum absolute rating. Therefore, make
absolutely certain not to use the TSD function in set design.
Mounting failure, such as misdirection or mismount, may cause a malfunction in the device.
while a external capacitor is charged. Output pin capacitor is recommended no larger than 1000µF. In addition, inserting a Vcc
series countercurrent prevention diode, or a bypass diode between the various pins and the vcc, is recommended.
and other conditions. Therefore, be sure to check all relevant factors, including transient characteristics.
short circuits; however, it is only effective in protecting the IC from destruction in sudden overcurrent accidents. The protection
circuit is not to be used continuously, or for transitions. In executing thermal design, bear in mind that overcurrent protection has
negative characteristic according with the temperature.
Thermal shutdown circuit
NOTES FOR USE
PIN NO. , PIN NAME
Pin Number
FIN
1
2
3
4
5
Pin Name
Design Information
GND
OUT
CTL
N.C.
ADJ
Vcc