LP3927 - Cellular/PCS System Power Management IC
Datasheet Packaging Samples & Pricing Reliability Knowledge Base

Key Specification
•3.0V to 5.5V Input Voltage Range
•Two 200 mA, Two 150 mA and One 100 mA LDO's
•100 mV typ Dropout Voltage @ IMAX
•150 mA General-Purpose Open-drain programmable current sink for back light LED
•Low Voltage Rail to Rail Input/Output Operational Amplifier
•28 pin LLP package

General Description

The LP3927 system power management IC is designed for cellular/PCS handsets as well as other portable systems that require intelligent power management. More...


Applications

•Cellular/PCS handsets
•PDA's, Palmtops, and portable terminals
•Single-Cell Li+ Systems
•2- or 3- Cell NiMH, NiCd or Alkaline System
  Typical Application
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ParametersValues
Power on Reset Yes
Watchdog No
Power Fail Input No
Manual Reset Yes
On/Off Pin Yes
Error Flag Yes
Input Min Voltage 3 Volt
Input Max Voltage 5.5 Volt
Output Current 150 mA
Output Voltage 2.6 Volt
RegType Supervisor
Temperature Min -40 deg C
Temperature Max 85 deg C


Typical Performance

click for larger image


  Block Diagram
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Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LP3927 Cellular/PCS System Power Management IC 709
Kbytes		 19-Dec-05 Download

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


Package Availability, Models, Samples & Pricing
Part NumberPackageFactory Lead TimeModelsSamples &
Electronic
Orders		Budgetary PricingStd
Pack
Size		Package
Marking
Format
TypePinsSpec.MSL
Rating		Peak
Reflow		RoHS
Report		CAD
Symbols		WeeksQtyQty$US each
LP3927ILQ-AZLLP28NOPB3260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$2.04reel
of
1000		NS
UZXYTTE#
3927-AZ
12 weeks2000
LP3927ILQX-AJLLP28STD1260RoHS Download Full productionN/A
 
Buy Now 		1K+$2.04reel
of
4500		NS
UZXYTTE#
3927-AJ
12 weeksN/A
LP3927ILQX-AZLLP28NOPB3260RoHS Download Full productionN/A
 
Buy Now 		1K+$2.04reel
of
4500		NS
UZXYTTE#
3927-AZ
12 weeksN/A

Obsolete Versions

Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
LP3927ILQ-AJ
NONE
NATIONAL SEMICONDUCTOR
16 Nov 2008

General Description

The LP3927 system power management IC is designed for cellular/PCS handsets as well as other portable systems that require intelligent power management. Each device contains five low-dropout linear regulators (LDO's), a reset timer, a power-up control logic, a general-purpose open drain output that can be used to light LEDs, and a CMOS rail-to-rail input/output operational amplifier.

Each linear regulator features an extremely low dropout voltage of 100 mV (typ) at maximum output current. LDO1 and LDO2 are powered on and off by either the KYBD or the VEXT# pin. LDO3, LDO4 and LDO5 each have its independent enable pin. LDO1 and LDO4 are rated at 150 mA each, LDO2 and LDO5 are rated at 200 mA each and LDO3 is rated at 100 mA. All LDO's are optimized for low noise and high isolation.

The open drain output current sink can be programmed up to 150 mA by using an external low cost resistor.

A single supply, low voltage operational amplifier has rail to rail input and output with 600 kHz of gain-bandwidth product.

Reliability Metrics

Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LP3927ILQ-AZCMOS70184060010890004309006723
LP3927ILQX-AJCMOS70184060010890004309006723
LP3927ILQX-AZCMOS70184060010890004309006723

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.


[Information as of 8-Nov-2009]