LM3488 - High Efficiency Low-Side N-Channel Controller for Switching Regulators
Datasheet Packaging Samples & Pricing Reliability Design Tools Reference Designs Application Notes Knowledge Base

Features
LM3488Q is AEC-Q100 qualified and manufactured on an Automotive Grade Flow
8-lead Mini-SO8 (MSOP-8) package
Internal push-pull driver with 1A peak current capability
Current limit and thermal shutdown
Frequency compensation optimized with a capacitor and a resistor
Internal softstart
Current Mode Operation
Undervoltage Lockout with hysteresis

Key Specification


Wide supply voltage range of 2.97V to 40V
100kHz to 1MHz Adjustable and Synchronizable clock frequency
±1.5% (over temperature) internal reference
5µA shutdown current (over temperature)

General Description


The LM3488 is a versatile Low-Side N-FET high performance controller for switching regulators. More...


Applications


Distributed Power Systems
Notebook, PDA, Digital Camera, and other Portable Applications
Offline Power Supplies
Set-Top Boxes
  Typical Application
click for larger image


ParametersValues
Input Min Voltage 2.95 Volt
Input Max Voltage 40 Volt
Adjustable Output Yes
Feedback Voltage 1.26 Volt
Output Range 1.26V min
Frequency Min 100 kHz
Frequency Max 1000 kHz
Adj Switch Frequency Yes
Sync Pin Yes
On/Off Pin Yes
SoftStart Yes
Error Flag No
Topology Boost, Sepic, Flyback
Step-Down No
Step-Up Yes
Inverting No
Flyback Yes
RegType Switching Regulator
Multiple Output Capability Yes
Temperature Min -40 deg C
Temperature Max 125 deg C
AEC Q-100 Automotive Grade 1
Automotive Yes


Typical Performance


*click for larger image


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LM3488

 
2.97 <=
V in Lower
 V
 
<=
V in Upper
 V
 
<= 40.00
V out 1.26 <=  V <= 300.00
I out    A <= 10.00
Ambient Temperature  °C <= 100


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Also Recommended
LM3478If Sync Capability Is Not Required
LM5020100V Input
LM502260V Input, 2MHz Switching Frequency
Additional Resources
Online Seminars Design Tools

Application Notes


Block Diagram


click for larger image



Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LM3488/LM3488Q High Efficiency Low-Side N-Channel Controller for Switching Regulators 491
Kbytes
30-Mar-09 Download
LM3488/LM3488Q High Efficiency Low-Side N-Channel Controller for Switching Regulators (Japanese)
709 Kbytes   Download

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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
LM3488QMMMINI SOIC8NOPB1260RoHS Download Full productionN/A
Samples
Buy Now
1K+$1.32reel
of
1000
ZXTT
SSKB
12 weeksN/A
LM3488MMMINI SOIC8NOPB
STD
1
1
260
260
RoHS Download Full productionN/A
Samples
Buy Now
1K+$0.99reel
of
1000
ZXTT
S21B
6 weeks2000
LM3488QMMXMINI SOIC8NOPB1260RoHS Download Full productionN/A
 
Buy Now
1K+$1.32reel
of
3500
ZXTT
SSKB
12 weeksN/A
LM3488MMXMINI SOIC8NOPB
STD
1
1
260
260
RoHS Download Full productionN/A
 
Buy Now
1K+$0.99reel
of
3500
ZXTT
S21B
6 weeks5000

General Description


The LM3488 is a versatile Low-Side N-FET high performance controller for switching regulators. It is suitable for use in topologies requiring low side FET, such as boost, flyback, SEPIC, etc. Moreover, the LM3488 can be operated at extremely high switching frequency in order to reduce the overall solution size. The switching frequency of LM3488 can be adjusted to any value between 100kHz and 1MHz by using a single external resistor or by synchronizing it to an external clock. Current mode control provides superior bandwidth and transient response, besides cycle-by-cycle current limiting. Output current can be programmed with a single external resistor.

The LM3488 has built in features such as thermal shutdown, short-circuit protection and over voltage protection. Power saving shutdown mode reduces the total supply current to 5µA and allows power supply sequencing. Internal soft-start limits the inrush current at start-up.

Reliability Metrics


Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LM3488MMABCD15003417500423400011201409060
LM3488MMXABCD15003417500423400011201409060
LM3488QMMABCD15003417500423400011201409060
LM3488QMMXABCD15003417500423400011201409060

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.


Design Tools


TitleSize in Kbytes Date Click link below to Download    
Application Note 1204 LM3478/LM3488 Evaluation Board 218 Kbytes 26-Sep-2002 View Online Download  
Power Reference Design Library     View    

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Reference Designs
LM3488 Reference Design - CUK Converter Circuit, Low Input/Output Ripple, Switch Failure Protection: 2.97-5.5V Input, -5.2V @ 3.3A Output

Application Notes


TitleSize in Kbytes Date Click link below to Download
AN-1204: Application Note 1204 LM3478/LM3488 Evaluation Board 218
Kbytes
10-May-04 Download
AN-1484: Application Note 1484 Designing A SEPIC Converter 196
Kbytes
30-Apr-08 Download
AN-1484 (Japanese): Application Note 1484 Designing A SEPIC Converter
175 Kbytes   Download
AN-1484 (Chinese): Application Note 1484 Designing A SEPIC Converter
338 Kbytes  

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More Application Notes


TitleSize in Kbytes Date Click link below to Download
AN-1756: Application Note 1756 LM3481 Evaluation Board 505
Kbytes
30-Apr-08 Download
AN-1756 (Japanese): Application Note 1756 LM3481 Evaluation Board
461 Kbytes   Download
AN-1471: Application Note 1471 LM3489 Demonstration Board 695
Kbytes
24-May-06 Download
AN-1227: Application Note 1227 LM3485 Evaluation Board 86
Kbytes
10-May-04 Download
AN-1392: Application Note 1392 LM3485 LED Demo Board 569
Kbytes
7-Jun-06 Download
AN-1392 (Chinese): Application Note 1392 LM3485 LED Demo Board
235 Kbytes  

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[Information as of 7-Nov-2009]