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 Products > Analog - Regulators > SwitchedCapacitor Converters > LM2687

LM2687  Product Folder

Low Noise Regulated Switched Capacitor Voltage Inverter
Generic P/N 2687
General
Description		 Features Datasheet Package
& Models		 Samples
& Pricing		 Reliability
Metrics

Parametric Table Parametric Table
Temperature Min (deg C) -40 
Temperature Max (deg C) 105 
Multiple Output Capability No 
On/Off Pin Yes 
Error Flag No 
InputMin Voltage (Volt) 2.70 
InputMax Voltage (Volt) 5.50 
Output Current (mA) 10 
Output Voltage (Volt) - 
Adjustable Output Yes 
Switching Frequency (Hz) 110000 
Adj Switch Frequency No 
Sync Pin No 
Efficiency (%) 91 
Inverting Yes 
Step-Up No 
Step-Down No 
RegType Switched Cap Regulator 

Datasheet

TitleSize in KbytesDate
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Download
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LM2687 Low Noise Regulated Switched Capacitor Voltage Inverter 297 Kbytes 17-Apr-03 View Online Download Receive via Email
LM2687 Low Noise Regulated Switched Capacitor Voltage Inverter (JAPANESE)
 289 Kbytes   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
LM2687LDLLP8StatusFull productionN/AN/ASamples
Buy Now		1K+$0.84reel
of
1000		ZXYTT
L050B
7-9 weeks10000
LM2687LDXLLP8StatusFull productionN/AN/A 1K+$0.84reel
of
4500		ZXYTT
L050B
7-9 weeks10000
LM2687MMMINI SOIC8StatusFull productionN/AN/ASamples
Buy Now		1K+$0.84reel
of
1000		ZXTT
S12A
11-12 weeks15000
LM2687MMXMINI SOIC8StatusFull productionN/AN/A 
Buy Now		1K+$0.84reel
of
3500		ZXTT
S12A
11-12 weeks20000
LM2687 MDCUnpackaged DieFull productionN/AN/ASamples  tray
of
N/A		-
N/A0
LM2687 MWCWaferFull productionN/AN/A   wafer jar
of
N/A		-
N/A0

General Description

The LM2687 CMOS Negative Regulated Switched Capacitor Voltage Inverter delivers a very low noise adjustable output for an input voltage in the range of +2.7V to +5.5V. Four low cost capacitors are used in this circuit to provide up to 10mA of output current. The regulated output for the LM2687 is adjustable between -1.5V and -5.2V. The LM2687 operates at 100 kHz (typical) switching frequency to reduce output resistance and voltage ripple. With an operating current of only 500 µA (charge pump power efficiency greater than 90% with most loads) and 0.05 µA typical shutdown current, the LM2687 provides ideal performance for cellular phone power amplifier bias and other low current, low noise negative voltage needs. The device comes in a small 8-pin MSOP or LLP package.

Features

  • Inverts and regulates the input supply voltage
  • Small MSOP-8 or LLP-8 package
  • 91% typical charge pump power efficiency at 10mA
  • Low output ripple (1mV typical)
  • Shutdown lowers Quiescent current to 0.05 µA (typical)

Applications

  • Wireless Communication Systems
  • Cellular Phone Power Amplifier Biasing
  • Interface Power Supplies
  • Handheld Instrumentation
  • Laptop Computers and PDA's

Reliability Metrics

Part Number Process Early Failure Rate - Rejects Sample Size (EFR) PPM * Rel. Rejects Device Hours Long Term Failure Rates (FITS) MTTF
LM2687 MDCABCD15001020000924003926125054
LM2687 MWCABCD15001020000924003926125054
LM2687LDABCD15001020000924003926125054
LM2687LDXABCD15001020000924003926125054
LM2687MMABCD15001020000924003926125054
LM2687MMXABCD15001020000924003926125054

For more information on Reliablitity Metrics, please click here.


[Information as of 15-Jan-2004]

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