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Nch FET Ultra LDO Controllers for PC Chipsets

BD3521FVM

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Data Sheet
Data Sheet (145K)
　
Technical Data
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RoHS
Application notes
Design Model
Quality information
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[ Product description ]

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.

Specifications
Input Voltage (V) 4.5 to 5.5
Output current (A) Depend on external FET
VTT Output current -
VREF Output current -
Output Voltage (V) 1.5
Voltage precision ±1%
NRCS(soft start) Variable
Thermal shut down Latch type
UVLO Yes
Over current protection None
Timer Latch type short circuit protection Yes
Package size(mm) 2.9×4.0×0.83

Features

・Reduced rush current by NRCS
・Built-in driver for external Nch h transistor
・Adoption of MSOP8 package : 2.9×4.0×0.83 (mm)
・Built-in timer latch short protection circuit
・Built-in low input maloperation prevention circuit
・Output voltage Fix type
・Built-in overheat protection circuit

*The contents described here are just outline for introduction.
Please obtain the specification sheets from us for thorough check before use.



Status Product

Part No. Package
(PDF)		 Status
*		 RoHS Constitution
materials list		 Packing
Type		 Unit
Quantity		 Minimum
Packaging
Quantity		 Sales Distribution
Inventory
BD3521FVM-TR MSOP8 Active Yes Embossed Tape And Reel 3000 3000 Inquiry

* Active: Production or current type  Preview: Development

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Regulators for PCs

2010.12.23

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