LM2734Z - Thin SOT23 1A Load Step-Down DC-DC Regulator

Datasheet Packaging Samples & Pricing Reliability Application Notes Knowledge Base

Features
Thin SOT23-6 package, or 6 lead LLP package
3.0V to 20V input voltage range
0.8V to 18V output voltage range
1A output current
3MHz switching frequency
300mΩ NMOS switch
30nA shutdown current
0.8V, 2% internal voltage reference
Internal soft-start
Current-Mode, PWM operation
Thermal shutdown
LM2734ZQ is AEC-Q100 Grade 1 qualified and is manufactured on an Automotive Grade Flow

General Description


The LM2734Z regulator is a monolithic, high frequency, PWM step-down DC/DC converter assembled in a 6-pin Thin SOT23 and LLP non pull back package. More...


Applications


DSL Modems
Local Point of Load Regulation
Battery Powered Devices
USB Powered Devices
Automotive
  Typical Application
click for larger image


Parametric Table     expand
Parametric Table    collapse
Output Current 1000 mA
Input Min Voltage 3 Volt
Input Max Voltage 20 Volt
Output Min 0.8 Volt
Output Max 18 Volt
Frequency Min 3000000 Hz
Frequency Max 3000000 Hz
Output Current 1000 mA
Input Min Voltage 3 Volt
Input Max Voltage 20 Volt
Output Min 0.8 Volt
Output Max 18 Volt
Frequency Min 3000000 Hz
Frequency Max 3000000 Hz
Efficiency (peak) 88 %
On/Off Pin Yes
Error Flag No
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 Buck
Special Features OVP, internal compensation, 30nA shutdown current, pulse-by-pulse current limit
Step-Down Yes
Multiple Output Capability No
Output Voltage Undefined Volt
Output Range 0.8V to 18V
Switching Frequency 3000000 Hz
AEC Q-100 Automotive Grade 1
Automotive Selection Guide Yes
View Using Catalog


Typical Performance


click for larger image


  Additional Resources
Application Notes (see below)


Block Diagram


click for larger image



Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to View Online Click link below to Download Click link below to Receive via Email
LM2734Z/LM2734ZQ Thin SOT23 1A Load Step-Down DC-DC Regulator 452 Kbytes 13-Jun-08 View Online Download Receive via Email

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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
LM2734ZMKTSOT6NOPB1260RoHS N/A Full productionN/A
Samples
Buy Now
1K+$1.75reel
of
1000
SFTB
XTT
8 weeks1000
LM2734ZMKXTSOT6NOPB1260RoHS N/A Full productionN/A
 
Buy Now
1K+$1.75reel
of
3000
SFTB
XTT
12 weeks15000
LM2734ZQSDLLP6NOPB3260RoHS N/A Full productionN/A
Samples CALLreel
of
N/A
ZXYTT
L238B
8 weeksN/A
LM2734ZQSDELLP6NOPB3260RoHS N/A Full productionN/A
  CALLreel
of
N/A
ZXYTT
L238B
12 weeksN/A
LM2734ZQSDXLLP6NOPB3260RoHS N/A Full productionN/A
  CALLreel
of
N/A
ZXYTT
L238B
6 weeksN/A
LM2734ZSDLLP6NOPB1260RoHS N/A Full productionN/A
Samples
Buy Now
1K+$1.75reel
of
1000
ZXYTT
L163B
12 weeks20000
LM2734ZSDXLLP6NOPB1260RoHS N/A Full productionN/A
 
Buy Now
1K+$1.75reel
of
4500
ZXYTT
L163B
6 weeks25000

General Description


The LM2734Z regulator is a monolithic, high frequency, PWM step-down DC/DC converter assembled in a 6-pin Thin SOT23 and LLP non pull back package. It provides all the active functions to provide local DC/DC conversion with fast transient response and accurate regulation in the smallest possible PCB area.

With a minimum of external components and online design support through WEBENCH® , the LM2734Z is easy to use. The ability to drive 1A loads with an internal 300mΩ NMOS switch using state-of-the-art 0.5µm BiCMOS technology results in the best power density available. The world class control circuitry allows for on-times as low as 13ns, thus supporting exceptionally high frequency conversion over the entire 3V to 20V input operating range down to the minimum output voltage of 0.8V. Switching frequency is internally set to 3MHz, allowing the use of extremely small surface mount inductors and chip capacitors. Even though the operating frequency is very high, efficiencies up to 85% are easy to achieve. External shutdown is included, featuring an ultra-low stand-by current of 30nA. The LM2734Z utilizes current-mode control and internal compensation to provide high-performance regulation over a wide range of operating conditions. Additional features include internal soft-start circuitry to reduce inrush current, pulse-by-pulse current limit, thermal shutdown, and output over-voltage protection.

Reliability Metrics


Part Number Process Early Failure Rate - Rejects Sample Size (EFR) PPM * Rel. Rejects Device Hours Long Term Failure Rates (FITS) MTTF
LM2734ZMKPVIP05008430004950008140457601
LM2734ZMKXPVIP05008430004950008140457601
LM2734ZQSDPVIP05008430004950008140457601
LM2734ZQSDEPVIP05008430004950008140457601
LM2734ZQSDXPVIP05008430004950008140457601
LM2734ZSDPVIP05008430004950008140457601
LM2734ZSDXPVIP05008430004950008140457601

For more information on Reliability Metrics, please click here.


Application Notes


TitleSize in Kbytes Date Click link below to View Online Click link below to Download Click link below to Receive via Email
AN-1280: Application Note 1280 LM2731/LM2733 Evaluation Board 55 Kbytes 18-Apr-03 View Online Download Receive via Email
AN-1658: Application Note 1658 LM2735 BOOST and SEPIC DC-DCRegulator 408 Kbytes 26-Jun-07 View Online Download Receive via Email
AN-1658 (Japanese): Application Note 1658 LM2735 BOOST and SEPIC DC-DCRegulator
620 Kbytes   View Online Download Receive via Email
AN-1658 (Chinese): Application Note 1658 LM2735 BOOST and SEPIC DC-DCRegulator
405 Kbytes  
AN-1350: Application Note 1350 LM2734 Evaluation Board 639 Kbytes 4-Feb-05 View Online Download Receive via Email
AN-1660: Application Note 1660 LM2735Y 6-Pin LLP Demo Board 487 Kbytes 26-Jun-07 View Online Download Receive via Email
AN-1660 (Chinese): Application Note 1660 LM2735Y 6-Pin LLP Demo Board
220 Kbytes  
AN-1668: Application Note 1668 LM2735Y 8-Pin eMSOP Demo Board 569 Kbytes 29-Jun-07 View Online Download Receive via Email
AN-1668 (Chinese): Application Note 1668 LM2735Y 8-Pin eMSOP Demo Board
213 Kbytes  
AN-1664: Application Note 1664 LM2735X 5-Pin SOT23 Demo Board 617 Kbytes 29-Jun-07 View Online Download Receive via Email
AN-1664 (Chinese): Application Note 1664 LM2735X 5-Pin SOT23 Demo Board
206 Kbytes  
AN-1666: Application Note 1666 LM2735X 6-Pin LLP Demo Board 539 Kbytes 26-Jun-07 View Online Download Receive via Email
AN-1666 (Chinese): Application Note 1666 LM2735X 6-Pin LLP Demo Board
224 Kbytes  
AN-1667: Application Note 1667 LM2735X 8-Pin eMSOP Demo Board 569 Kbytes 27-Jun-07 View Online Download Receive via Email
AN-1667 (Chinese): Application Note 1667 LM2735X 8-Pin eMSOP Demo Board
218 Kbytes  
AN-1665: Application Note 1665 LM2735Y 5-Pin SOT23 Demo Board 617 Kbytes 29-Jun-07 View Online Download Receive via Email
AN-1665 (Chinese): Application Note 1665 LM2735Y 5-Pin SOT23 Demo Board
203 Kbytes  
AN-1659: Application Note 1659 LM2735X SEPIC 6-Pin LLP Demo Board 352 Kbytes 26-Jun-07 View Online Download Receive via Email
AN-1659 (Chinese): Application Note 1659 LM2735X SEPIC 6-Pin LLP Demo Board
202 Kbytes  

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

[Information as of 29-Aug-2008]