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 Products > Analog - Regulators > Linear Regulators - Low Dropout Voltage > Positive Voltage - Fixed > LP3856

LP3856  Product Folder

3A Fast Ultra Low Dropout Linear Regulator
  

See Also:		   
LP3883 - FOR INPUT VOLTAGES AS LOW AS 1.6V, 1.8V, 2.0V AND 2.5V
     LP3853 - OFFERS INTERNALLY PRE-SET OUTPUT VOLTAGES
     LP3856-ADJ - AJUSTABLE OUTPUT VOLTAGE
Generic P/N 3856
General
Description		 Features Datasheet Package
& Models		 Samples
& Pricing		 Reliability
Metrics		 Application
Notes

Parametric Table Parametric Table
Temperature Min (deg C) -40 
Temperature Max (deg C) 125 
Multiple Output Capability No 
On/Off Pin Yes 
Error Flag No 
InputMin Voltage (Volt) 2.50 
InputMax Voltage (Volt) 7 
Output Current (mA) 3000 
Dropout Voltage (Volt) .39 
Quiescent Current (mA) 4 
SecondaryOutput Voltage (Volt) - 
SecondaryOutput Current (Amp) - 
RegType LDO 
Output Voltage (Volt) 1.80, 2.50, 3.30, 5 
Watchdog No 

Datasheet

TitleSize in KbytesDate
View Online
Download
Receive via Email
LP3853 LP3856 3A Fast Ultra Low Dropout Linear Regulators 366 Kbytes 17-Sep-03 View Online Download Receive via Email

If you have trouble printing or viewing PDF file(s), see Printing Problems.

Package Availability, Models, Samples & Pricing

Part NumberPackageStatusModelsSamples &
Electronic
Orders		Budgetary PricingStd
Pack
Size		Package
Marking
TypePinsMSL/Lead-Free AvailabilityLead
Time		QtySPICEIBISQty$US each
LP3856ET-1.8TO 2205StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$2.58rail
of
45		NSUZXYTT
LP3856ET
-1.8
12-14 weeks50000
LP3856ET-2.5TO 2205StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$2.58rail
of
45		NSUZXYTT
LP3856ET
-2.5
12-14 weeks50000
LP3856ET-3.3TO 2205StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$2.58rail
of
45		NSUZXYTT
LP3856ET
-3.3
12-14 weeks50000
LP3856ET-5.0TO 2205StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$2.58rail
of
45		NSUZXYTT
LP3856ET
-5.0
12-14 weeks50000
LP3856ET-ADJTO 2205StatusFull productionN/AN/ASamples
Buy Now		1K+$2.58rail
of
45		NSUZXYTT
LP3856ET
-ADJ
12-14 weeks50000
LP3856ES-1.8TO 2635StatusFull productionN/AN/A24 Hour Samples
Buy Now		1K+$2.58rail
of
45		NSUZXYTT
LP3856ES
-1.8
12-14 weeks50000
LP3856ES-2.5TO 2635StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$2.58rail
of
45		NSUZXYTT
LP3856ES
-2.5
12-14 weeks50000
LP3856ES-3.3TO 2635StatusFull productionN/AN/A24 Hour Samples
Buy Now		1K+$2.58rail
of
45		NSUZXYTT
LP3856ES
-3.3
12-14 weeks50000
LP3856ES-5.0TO 2635StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$2.58rail
of
45		NSUZXYTT
LP3856ES
-5.0
12-14 weeks50000
LP3856ES-ADJTO 2635StatusFull productionN/AN/ASamples1K+$2.58rail
of
45		NSUZXYTT
LP3856ES
-ADJ
12-14 weeks25000
LP3856ESX-1.8TO 2635StatusFull productionN/AN/A 
Buy Now		1K+$2.58reel
of
500		NSUZXYTT
LP3856ES
-1.8
12-14 weeks50000
LP3856ESX-2.5TO 2635StatusFull productionN/AN/A 1K+$2.58reel
of
500		NSUZXYTT
LP3856ES
-2.5
12-14 weeks50000
LP3856ESX-3.3TO 2635StatusFull productionN/AN/A 1K+$2.58reel
of
500		NSUZXYTT
LP3856ES
-3.3
12-14 weeks50000
LP3856ESX-5.0TO 2635StatusFull productionN/AN/A 1K+$2.58reel
of
500		NSUZXYTT
LP3856ES
-5.0
12-14 weeks50000
LP3856ESX-ADJTO 2635StatusFull productionN/AN/A 1K+$2.58reel
of
500		NSUZXYTT
LP3856ES
-ADJ
12-14 weeks50000

General Description

The LP3853/LP3856 series of fast ultra low-dropout linear regulators operate from a +2.5V to +7.0V input supply. Wide range of preset output voltage options are available. These ultra low dropout linear regulators respond very quickly to step changes in load, which makes them suitable for low voltage microprocessor applications. The LP3853/LP3856 are developed on a CMOS process which allows low quiescent current operation independent of output load current. This CMOS process also allows the LP3853/LP3856 to operate under extremely low dropout conditions.

Dropout Voltage: Ultra low dropout voltage; typically 39mV at 300mA load current and 390mV at 3A load current.

Ground Pin Current: Typically 4mA at 3A load current.

Shutdown Mode: Typically 10nA quiescent current when the shutdown pin is pulled low.

Error# Flag: Error# flag goes low when the output voltage drops 10% below nominal value.

SENSE: Sense pin improves regulation at remote loads.

Precision Output Voltage: Multiple output voltage options are available ranging from 1.8V to 5.0V with a guaranteed accuracy of ±1.5% at room temperature, and ±3.0% over all conditions (varying line, load, and temperature).

Features

  • Ultra low dropout voltage
  • Low ground pin current
  • Load regulation of 0.08%
  • 10nA quiescent current in shutdown mode
  • Guaranteed output current of 3A DC
  • Available in TO-263 and TO-220 packages
  • Output voltage accuracy ± 1.5%
  • Error# flag indicates output status
  • Sense option improves load regulation
  • Minimum output capacitor requirements
  • Overtemperature/overcurrent protection
  • -40°C to +125°C junction temperature range

Applications

  • Microprocessor power supplies
  • GTL, GTL+, BTL, and SSTL bus terminators
  • Power supplies for DSPs
  • SCSI terminator
  • Post regulators
  • High efficiency linear regulators
  • Battery chargers
  • Other battery powered applications

Reliability Metrics

Part Number Process Early Failure Rate - Rejects Sample Size (EFR) PPM * Rel. Rejects Device Hours Long Term Failure Rates (FITS) MTTF
LP3856ES-ADJCS06508800006000006169643205
LP3856ESX-ADJCS06508800006000006169643205
LP3856ES-1.8CS06508800006000006169643205
LP3856ES-2.5CS06508800006000006169643205
LP3856ES-3.3CS06508800006000006169643205
LP3856ES-5.0CS06508800006000006169643205
LP3856ESX-1.8CS06508800006000006169643205
LP3856ESX-2.5CS06508800006000006169643205
LP3856ESX-3.3CS06508800006000006169643205
LP3856ESX-5.0CS06508800006000006169643205
LP3856ET-1.8CS06508800006000006169643205
LP3856ET-2.5CS06508800006000006169643205
LP3856ET-3.3CS06508800006000006169643205
LP3856ET-5.0CS06508800006000006169643205
LP3856ET-ADJCS06508800006000006169643205

For more information on Reliablitity Metrics, please click here.


Application Notes

TitleSize in KbytesDate
View Online
Download
Receive via Email
AN-1148: Application Note 1148 Linear Regulators: Theory of Operation and Compensation 200 Kbytes 25-Sep-02 View Online Download Receive via Email

If you have trouble printing or viewing PDF file(s), see Printing Problems.

[Information as of 15-Jan-2004]

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