LM2653 - 1.5A High Efficiency Synchronous Switching Regulator
Datasheet Packaging Samples & Pricing Eval. Boards Reliability Application Notes Knowledge Base

Features
Efficiency up to 97%
4V to 14V input voltage range
1.5V to 5.0V adjustable output voltage
0.1 Switch On Resistance
300 kHz fixed frequency internal oscillator
7 µA shutdown current
Patented current sensing for current mode control
Input undervoltage lockout
Output overvoltage shutdown protection
Output undervoltage shutdown protection
Adjustable soft-start
Adjustable PGOOD delay
Current limit and thermal shutdown

General Description


The LM2653 switching regulator provides high efficient power conversion over a 100:1 load range (1.5A to 15 mA). More...


Applications


Webpad
Personal digital assistants (PDAs)
Computer peripherals
Battery-powered devices
Notebook computer video supply
Handheld scanners
GXM I/O and core voltage
High efficiency 5V conversion
  Typical Application
click for larger image


ParametersValues
Output Current 1500 mA
Input Min Voltage 4 Volt
Input Max Voltage 14 Volt
Output Min 1.5 Volt
Output Max 5 Volt
Frequency Min 300 kHz
Frequency Max 300 kHz
Efficiency (peak) 97 %
On/Off Pin Yes
Error Flag Yes
SoftStart Yes
Sync Pin No
Inverting No
Flyback No
RegType Switching Regulator
Temperature Min -40 deg C
Temperature Max 125 deg C
Adjustable Output Yes
Adj Switch Frequency No
PWM Mode Current
Topology Synchronous Buck
Special Features Max. Iq at shutdown is 20uA over full temp range, 7uA typical
Step-Down Yes
Multiple Output Capability No
Output Power Undefined Watt
Output Voltage Undefined Volt
Output Range 1.5V to 5.0V
Switching Frequency 300 kHz
Feedback Voltage Undefined Volt
Regulator Family Undefined
Synchronous Rectification Yes


Typical Performance


click for larger image


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LM2653

 
4.00 <=
V in Lower
 V
 
<=
V in Upper
 V
 
<= 14.00
V out 1.24 <=  V <= 14.00
I out    A <= 1.50
Ambient Temperature  °C <= 100


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LM26503A Integrated Synchronous Regulator W/ Adj Frequency And Sync Pin
Additional Resources
Application Notes


Block Diagram


click for larger image



Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LM2653 1.5A High Efficiency Synchronous Switching Regulator 665
Kbytes
14-Apr-05 Download
LM2653 1.5A High Efficiency Synchronous Switching Regulator (Japanese)
418 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
LM2653-ADJEVAL1.5A High Efficiency Synchronous Switching RegulatorFull productionN/A
 
Buy Now
1+$50.901-
8 weeksN/A
LM2653MTC-ADJTSSOP16NOPB
STD
1
1
260
260
RoHS Download Full productionN/A
Samples
Buy Now
1K+$1.95rail
of
92
NSZXYTT
2653MT
C-ADJ
12 weeks1000
LM2653MTCX-ADJTSSOP16NOPB1260RoHS Download Full productionN/A
 
Buy Now
1K+$1.95reel
of
2500
NSZXYTT
2653MT
C-ADJ
6 weeks5000

General Description


The LM2653 switching regulator provides high efficient power conversion over a 100:1 load range (1.5A to 15 mA). This feature makes the LM2653 an ideal fit in battery-powered applications.

Synchronous rectification is used to achieve up to 97% efficiency. At light loads, the LM2653 enters a low power hysteretic or "sleep" mode to keep the efficiency high. In many applications, the efficiency still exceeds 80% at 15 mA load. A shutdown pin is available to disable the LM2653 and reduce the supply current to 7µA.

All the power, control, and drive functions are integrated within the ICs. The ICs contain patented current sensing circuity for current mode control. This feature eliminates the external current sensing resistor required by other current-mode DC-DC converters.

The ICs have a 300 kHz fixed frequency internal oscillator. The high oscillator frequency allows the use of extremely small, low profile components.

Protection features include thermal shutdown, input undervoltage lockout, adjustable soft-start, cycle by cycle current limit, output overvoltage and undervoltage protections.

Reliability Metrics


Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LM2653MTC-ADJABCD15003417500423400011201409060
LM2653MTCX-ADJABCD15003417500423400011201409060

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.


Application Notes


TitleSize in Kbytes Date Click link below to Download
AN-1133: Application Note 1133 LM2653EVAL 1.5A Synchronous Switching Regulator Evaluation Board 76
Kbytes
4-Oct-04 Download

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More Application Notes


TitleSize in Kbytes Date Click link below to Download
AN-1143: Application Note 1143 LM2651_3.3V_EVAL 1.5A High Efficiency Synchronous Switching Regulator Evaluation Board 150
Kbytes
24-Jul-08 Download
AN-1147: Application Note 1147 LM2651_EVAL 1.5A High Efficiency Synchronous Switching Regulator Evaluation Board 149
Kbytes
2-Oct-07 Download
AN-1215: Application Note 1215 LM2655 2.5A Synchronous Switching Regulator Evaluation Board 307
Kbytes
10-May-04 Download
AN-1520: Application Note 1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages 2176
Kbytes
7-Sep-06 Download
AN-1520 (Chinese): Application Note 1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages
849 Kbytes  
AN-1071: Application Note 1071 Information About the LM2650 Evaluation Board Rev. 1 105
Kbytes
4-Oct-04 Download
AN-1071 (Japanese): Application Note 1071 Information About the LM2650 Evaluation Board Rev. 1
279 Kbytes   Download

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

[Information as of 8-Nov-2009]