Thin SOT23 750mA Load Step-Down DC-DC Regulator - LM2736

LM2736 (ACTIVE)

Thin SOT23 750mA Load Step-Down DC-DC Regulator

Recommended alternative parts

  • LM2734  -  1A Output Current, Wider Vin Range, Vout Down To 0.8V
  • LM2734-Q1  -  1A Output Current, Wider Vin Range, Vout Down To 0.8V
  • LM5010  -  1A Output Current, Up To 80V Vin

Description

The LM2736 regulator is a monolithic, high frequency, PWM step-down DC/DC converter in a 6-pin Thin SOT 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 LM2736 is easy to use. The ability to drive 750 mA loads with an internal 350 mΩ NMOS switch using state-of-the-art 0.5 µm BiCMOS technology results in the best power density available. The world class control circuitry allows for on-times as low as 13 ns, thus supporting exceptionally high frequency conversion over the entire 3 V to 18 V input operating range down to the minimum output voltage of 1.25 V. Switching frequency is internally set to 550 kHz (LM2736Y) or 1.6 MHz (LM2736X), allowing the use of extremely small surface mount inductors and chip capacitors. Even though the operating frequencies are very high, efficiencies up to 90% are easy to achieve. External shutdown is included, featuring an ultra-low stand-by current of 30 nA. The LM2736 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.

For all available packages, see the orderable addendum at the end of the datasheet.

Features

  • Thin SOT-6 Package
  • 3.0 V to 18 V Input Voltage Range
  • 1.25 V to 16 V Output Voltage Range
  • 750 mA Output Current
  • 550 kHz (LM2736Y) and 1.6 MHz (LM2736X) Switching Frequencies
  • 350 mΩ NMOS Switch
  • 30 nA Shutdown Current
  • 1.25 V, 2% Internal Voltage Reference
  • Internal Soft-Start
  • Current-Mode, PWM Operation
  • WEBENCH Online Design Tool
  • Thermal Shutdown

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Parametrics Compare all products in Step-Down (Buck) Converter

 
Regulated Outputs (#)
Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Iout (Max) (A)
Topology
Switching Frequency (Max) (kHz)
Switch Current Limit (Typ) (A)
Iq (Typ) (mA)
Duty Cycle (Max) (%)
Soft Start
Compensation
Special Features
Control Mode
Vref Accuracy (Typ) (%)
Rating
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
LM2736
1    
3    
18    
1.25    
16    
0.75    
Buck    
1900    
1.5    
1.5    
96    
Fixed    
Internal    
Enable
Light Load Efficiency
Pre-Bias Start-Up    
Current Mode    
2    
Catalog    
-40 to 125    
6SOT    
0.65 | 1ku    

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WEBENCH® LM2736
    Min   Max   Range  
  Vin V 3.0 to 18.0V  
  Vout V 1.25 to 16.0V  
  Iout A ≤ 0.75A  
  Ambient Temp °C -40 to 125°C  
Footprint BOM Cost Efficiency
 
   
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