500mA Output LDO Regulators with Voltage Detector and Watchdog Timer - BD3020HFP

BD3020HFP is a regulator IC with integrated WDT (Watch Dog Timer), high output voltage accuracy ±2.0% and 80µA (Typ) low circuit current consumption. These are supports usage of low ESR ceramic capacitor for output stability. The reset detection voltage can be adjusted by connecting resistors on the Vs terminal. They can be a stable power supply for any applications while detecting malfunction of microcontrollers.

* This product is a STANDARD grade product and not recommend for on-vehicle devices.
Part number
Unit Quantity
Minimum Package Quantity
Packing Type
BD3020HFP-TR Active HRP7 2000 2000 Taping Yes
Grade Standard
Breakdown Voltage(Max.)[V] 50.0
ch 1
Vin(Min.)[V] 5.6
Vin(Max.)[V] 36.0
Vout (Typ.) [V] 5
Vout Precision ±2.0%
Iout(Max.)[A] 0.5
Circuit Current[mA] 0.08
I/O Voltage Difference (Typ.)[V] 0.3(Io=0.2A)
Load Regulation[mV] 30
Detect Voltage(VDET) [V] 4.1
Additional Feature Adjustable Detection Voltage through Vs pin
Operating Temperature (Min.)[°C] -40
Operating Temperature (Max.)[°C] 125
    • Integrated WDT Reset Circuit
      Adjustable Detection Voltage through Vs pin
    • Low saturation voltage by using PMOS output transistor
    • VCC Max Voltage: 50V
    • Integrated Over Current Protection and Thermal Shut Down
    • HRP7 package
Other New/Updated Products Relating to Power Management
PART NUMBER Product Name Package Datasheet Distribution Inventory
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BD4271HFP-C 550mA Output LDO Regulator with WDT and Voltage Detector HRP7   Buy Sample
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Technical Data
Thermal Resistance

The definition and how to use thermal resistance and thermal characterization parameter of packages for ROHM’s integrated circuit are described in this application note.

Basics of Linear Regulators

A linear regulator, also referred to as a "three-terminal regulator" or "dropper," is a power supply long known to many designers owning to its simple circuitry and ease of use...

Linear Regulator Specifications

Very important information such as maximum ratings, operating conditions and characteristic graphs are described in the table.

Reverse Voltage Protection

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Simple Test Method for Estimating the Stability of Linear Regulators

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Thermal Calculation for Linear Regulator

The loss in linear regulators increases as the difference between the input and output voltages increases. Since most of the loss is converted to heat, a very large amount of heat may be generated in some conditions...

Power Source ON/OFF Characteristics for Linear Regulator

When a linear regulator IC is turned ON, the electric charge is stored in the output capacitor and the output voltage increases up to the specified value.

BAxxCC0 Series Circuit Using a Ceramic Output Capacitor

This application note proposes a circuit using an output ceramic capacitor that allows a stable phase compensation.

Measurement Method for Phase Margin with Frequency Response Analyzer (FRA)

This application note introduces a method for easily measuring the phase margin with a Frequency Response Analyzer (FRA) made by NF Corporation.

Connecting LDOs in Parallel

Provides some hints on how to connect LDOs in parallel.