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4.5-5.5V 1ch Nch FET LDO Controllers - BD3521FVM

This IC is an ultra-low dropout linear regulator controller for chipset that can achieve ultra-low voltage input to ultra-low voltage output. By using N-MOSFET for external power transistor, the controller can be used at ultra-low I / O voltage difference up to voltage difference generated by ON resistance. In addition, because best suited power transistor can be chosen in accord with the output current, downsizing and cost reduction of the set can be achieved. Because by reducing the I / O voltage difference, large current output is achieved and conversion loss can be reduced, switching power supply can be replaced. This IC does not need any choke coil, diode for rectification and power transistor which are required for switching power supply, total cost of the set can be reduced and compact size can be achieved for the set. In addition, since voltage output start-up time can be adjusted by using the NRCS terminal, it is possible to flexibly meet the power supply sequence of the set.

* 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
BD3521FVM-TR Active MSOP8 3000 3000 Taping Yes
 
Specifications:
Grade Standard
Breakdown Voltage(Max.)[V] 7.0
ch 1
Vin(Min.)[V] 4.5
Vin(Max.)[V] 5.5
Vin 2ch[V] Vo+(IoMax. x Ron)
Vout (Typ.) [V] 1.5
Vout Precision ±1.0
Thermal Shut-down Latch
Under Voltage Lock Out Yes
Soft Start Variable
Additional Feature Timer Latch Protection
Operating Temperature (Min.)[°C] -10
Operating Temperature (Max.)[°C] 100
Features:
  • ・Reduced rush current by NRCS
    ・Built-in driver for external Nch h transistor
    ・Adoption of MSOP8 package : 2.9 x 4.0 x 0.83 (mm)
    ・Built-in timer latch short protection circuit
    ・Built-in low input maloperation prevention circuit
    ・Output voltage Fix type
    ・Built-in overheat protection circuit
 
 
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