LM26480 - Externally Programmable Dual High-Current Step-Down DC/DC and Dual Linear Regulators
Datasheet Packaging Samples & Pricing Eval. Boards Knowledge Base

Features
•Compatible with advanced applications processors and FPGAs
•2 LDOs for powering Internal processor functions and I/Os
•Precision internal reference
•Thermal overload protection
•Current overload protection
•24-lead 4 × 4 × 0.8mm LLP package
•External Power-On-Reset function for Buck1 and Buck2
•Undervoltage lock-out detector to monitor input supply voltage

Key Specification

Step-Down DC/DC Converter (Buck) Linear Regulators (LDO)
•1.5A output current
•VOUT from:
•Buck1 : 0.8V–2.0V @ 1.5A
•Buck2 : 1.0V–3.3V @ 1.5A
•Up to 96% efficiency
•±3% FB voltage accuracy
•2 MHz PWM switching frequency
•PWM - PFM automatic mode change under low loads
•Automatic soft start
•VOUT of 1.0V–3.5V
• ±3% FB voltage accuracy
•300 mA output current
•25 mV (typ) dropout

General Description

The LM26480 is a multi-functional Power Management Unit, optimized for low-power digital applications. More...


Applications

•Core digital power
•Applications processors
•Peripheral I/O power
  Typical Application
click for larger image

typicla application circuit

ParametersValues
Input Min Voltage 2.8 Volt
Input Max Voltage 5.5 Volt
Output Range LDOs: 1.0 to 3.3V; Buck: 0.8 to 3.3V
Efficiency (peak) 95 %
Special Features 2 Bucks, 2 LDOs, Resistor Network set voltages, Separate Enables
Flyback No
RegType Power Management Unit
Temperature Min -40 deg C
Temperature Max 85 deg C
Topology Buck, LDO
Switching Frequency 2000 kHz
Adj Switch Frequency Yes
Sync Pin No
RegType Power Management Unit
Step-Down Yes
Inverting No
Flyback No
Adjustable Output Yes
Adj Switch Frequency Yes
Efficiency (peak) 95 %
Output Power 1.43 Watt
Adjustable Output Yes
Step-Down Yes
Multiple Output Capability Yes
Error Flag No
On/Off Pin Yes
Multiple Output Capability Yes
Temperature Min -40 deg C
Temperature Max 85 deg C
AEC Q-100 Automotive Grade 1
Automotive Yes


Typical Performance

click for larger image


  Also Recommended
LM26420Dual 2A Buck With Power Good And Enable For Each Channel
Connection Diagram
click for larger image

revised package drawing

Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LM26480 Externally Programmable Dual High-Current Step-Down DC/DC and Dual Linear Regulators 2405
Kbytes		 12-Sep-08 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
LM26480SQ-AAEVLM26480SQ-AA Evaluation BoardFull productionN/A
 
Buy Now 		1+$55.001-
6 weeksN/A
LM26480QSQ-CFLLP24NOPB1260RoHS N/A PreliminaryN/A
  CALLreel
of
N/A		NS
UZXYTT
26480CF
N/AN/A
LM26480QSQX-CFLLP24NOPB1260RoHS N/A PreliminaryN/A
  CALLreel
of
N/A		NS
UZXYTT
26480CF
N/AN/A
LM26480SQ-AALLP24NOPB1260RoHS N/A Full productionN/A
Samples
Buy Now 		1K+$1.90reel
of
1000		NS
UZXYTT
26480AA
6 weeksN/A
LM26480SQX-AALLP24NOPB1260RoHS N/A Full productionN/A
 
Buy Now 		1K+$1.90reel
of
4500		NS
UZXYTT
26480AA
8 weeksN/A

General Description

The LM26480 is a multi-functional Power Management Unit, optimized for low-power digital applications. This device integrates two highly efficient 1.5A step-down DC/DC converters and two 300 mA linear regulators. The LM26480 is offered in a tiny 4 x 4 x 0.8mm LLP-24 pin package.

Application Notes

TitleSize in Kbytes Date Click link below to Download
AN-1800: Application Note 1800 Evaluation Kit for LM26480 - Dual DC/DC Buck Regulators with Dual Low-Noise Linear Regulators 2805
Kbytes		 3-Sep-08 Download
AN-1800 (Chinese): Application Note 1800 Evaluation Kit for LM26480 - Dual DC/DC Buck Regulators with Dual Low-Noise Linear Regulators
 730 Kbytes  
AN-1858: Application Note 1858 LM26484 Power Management Unit Evaluation Board Application Note 582
Kbytes		 4-Nov-09 Download

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

[Information as of 8-Nov-2009]