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550mA Output LDO Regulator with WDT and Voltage Detector - BD4271HFP-C

BD4271HFP-C is automotive voltage regulator with watchdog timer and offers the output current of 550mA while limiting the quiescent current low. A logical “HIGH” at the CTL pin enables the LDO regulator and “LOW” disables the LDO regulator and keeps current consumption low. A reset signal is generated for an output voltage VO of Typ 4.65V. The reset delay time and watchdog time (WDT) can be programmed by the external capacitor.

número de peça
Estado de Condição
pacote
Quantidade Unidade
Quantidade mínima Package
tipo de embalagem
RoHS
BD4271HFP-CTR Active HRP7 2000 2000 Taping sim
 
especificações:
Grade Automotive
ch 1
Vin(Min.)[V] 5.5
Vin(Max.)[V] 45.0
Vout (Typ.) [V] 5
Vout Precision ±2.0%
Iout(Max.)[A] 0.55
Circuit Current[mA] 0.075
Shutdown Function No
Thermal Shut-down Yes
Over Current Protection Yes
Under Voltage Lock Out Yes
I/O Voltage Difference (Typ.)[V] 0.2(Io=300mA)
Ripple Rejection [dB] 60.0
Load Regulation[mV] 10
Operating Temperature (Min.)[°C] -40
Operating Temperature (Max.)[°C] 150
características:
    • Low ESR ceramic capacitors applicable for output
    • Low drop voltage: PDMOS output transistor
    • Power on and under-voltage reset
    • Programmable reset delay and watchdog time by external capacitor
 
 
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Dados técnicos
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

Low drop-out (LDO) regulators developed back in the age when large-capacitance multi-layer ceramic capacitors (hereinafter, MLCCs) were uncommon cause a phase delay, leading to oscillation when connected to a low-ESR capacitor like an MLCC...

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.