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4.3-5.5V 4A 1ch LDO - BD3509MUV

The BD3509MUV ultra low-dropout linear chipset regulator operates from a very low input supply, and offers ideal performance in low input voltage to low output voltage applications. It incorporates a built-in N-MOSFET power transistor to minimize the input-to-output voltage differential to the ON resistance (RON MAX=50mO) level. By lowering the dropout voltage in this way, the regulator realizes high current output (Iomax=4.0A) with reduced conversion loss, and thereby obviates the switching regulator and its power transistor, choke coil, and rectifier diode. Thus, the BD3509MUV are designed to enable significant package profile downsizing and cost reduction. An external resistor allows the entire range of output voltage configurations between 0.65 and 2.7V, while the NRCS (soft start) function enables a controlled output voltage ramp-up, which can be programmed to whatever power supply sequence is required.

* This product is a STANDARD grade product and not recommend for on-vehicle devices.
Part number
Status
Package
Unit Quantity
Minimum Package Quantity
Packing Type
RoHS
BD3509MUV-E2 Active VQFN020V4040 2500 2500 Taping Yes
 
Specifications:
Grade Standard
Breakdown Voltage(Max.)[V] 6.0
ch 1
Vin(Min.)[V] 4.3
Vin(Max.)[V] 5.5
Vin 2ch[V] 0.7 to Vcc-1
Vout (Typ.) [V] 0.65 to 2.7
Vout Precision ±1.0
Iout(Max.)[A] 4.0
Thermal Shut-down Recover
Over Current Protection Yes
Under Voltage Lock Out Yes
Soft Start Variable
Operating Temperature (Min.)[°C] -10
Operating Temperature (Max.)[°C] 100
Features:
  • ・Internal high-precision reference voltage circuit (0.65V±1%)
    ・Built-in VCC under voltage lock out circuit (VCC=3.80V)
    ・NRCS (soft start) function reduces the magnitude of in-rush current
    ・Internal Nch MOSFET driver offers low ON resistance (28mΩ typ)
    ・Built-in current limit circuit (4.0A min)
    ・Built-in thermal shutdown (TSD) circuit
    ・Variable output (0.65 to 2.7V)
    ・Incorporates high-power VQFN020V4040 package : 4.0x4.0x0.9(mm)
    ・Tracking function
 
 
Technical Data
Application Note

Thermal Resistance

Application Note

Basics of Linear Regulators

Application Note

Linear Regulator Specifications

Application Note

Reverse Voltage Protection

Application Note

Simple Test Method for Estimating the Stability of Linear Regulators

Application Note

Table of resistance for output voltage setting on linear regulator Ics