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Nch FET Ultra LDO for PC Chipsets

BD3552HFN

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[ Product description ]

The BD3550HFN / BD3551HFN / BD3552HFN 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=400mΩ / 200mΩ / 100mΩ) level. By lowering the dropout voltage in this way, the regulator realizes high current output (Iomax=0.5A / 1.0A / 2.0A) with reduced conversion loss, and thereby obviates the switching regulator and its power transistor, choke coil, and rectifier diode. Thus, the BD355XHFN is 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.

Specifications
Input Voltage (V) 4.3 to 5.5
Output current (A) 2.0
VTT Output current -
VREF Output current -
Output Voltage (V) 0.65 to 2.7
Voltage precision ±1%
NRCS(soft start) Variable
Thermal shut down Recovery
UVLO Yes
Over current protection Yes
Timer Latch type short circuit protection None
Package size(mm) 2.9×3.0×0.5

Features

・Internal high-precision reference voltage circuit(0.65V±1%)
・Built-in VCC under voltage lockout circuit
・NRCS (soft start) function reduces the magnitude of in-rush current
・Internal Nch MOSFET driver offers low ON resistance (100mΩ (BD3552HFN typ) )
・Built-in current limit circuit
・Built-in thermal shutdown (TSD) circuit
・Variable output (0.65 to 2.7V)
・Small package HSON8 : 2.9×3×0.6 (mm)
・Tracking function

*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
BD3552HFN-TR HSON8 Active Yes Embossed Tape And Reel 3000 3000 Inquiry

* Active: Production or current type  Preview: Development

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2010.12.23

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