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 750mA loads with an internal 350mΩ 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 18V input operating range down to the minimum output voltage of 1.25V. Switching frequency is internally set to 550kHz (LM2736Y) or 1.6MHz (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 30nA. 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.

Features

  • Thin SOT-6 Package
  • 3.0V to 18V Input Voltage Range
  • 1.25V to 16V Output Voltage Range
  • 750mA Output Current
  • 550kHz (LM2736Y) and 1.6MHz (LM2736X) Switching Frequencies
  • 350mΩ NMOS Switch
  • 30nA Shutdown Current
  • 1.25V, 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
Brand
Control Mode
Vref Accuracy (Typ) (%)
Rating
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
LM2736 LMR12010 LM2734 LMR12015 TPS54331 TPS54231 TPS5430 TPS54340 LM2675 TPS54332 TPS54232 TPS54233 TPS54360
1     1     1     1     1     1     1     1     1     1     1     1     1    
3     3     3     3     3.5     3.5     5.5     4.5     6.5     3.5     3.5     3.5     4.5    
18     20     20     20     28     28     36     42     40     28     28     28     60    
1.25     0.8     0.8     1     0.8     0.8     1.23     0.8     1.23     0.8     0.8     0.8     0.8    
16     17     18     18     25     25     31     41     37     25     25     25     58.8    
0.75     1     1     1.5     3     2     3     3.5     1     3.5     2     2     3.5    
Buck     Buck     Buck     Buck     Buck     Buck     Buck
Inverting Buck-Boost    
Buck
Inverting Buck-Boost    
Buck     Buck     Buck     Buck     Buck
Inverting Buck-Boost    
  3000       2200     570     570     500     2500     260     1000     1000     300     2500    
  1.7       2     5.8     3.5     4     5.5     1.55     6.5     4.9     3.5     5.5    
  1.5       2.4     0.11     0.075     3     0.146     2.5     0.082     0.085     0.075     0.146    
  92       90     90     90     87     98     95     90     90     90     98    
  Fixed         Adjustable     Adjustable     Fixed     Fixed     Fixed     Adjustable     Adjustable     Adjustable     Fixed    
  Internal         External     External     Internal     External     Internal     External     External     External     External    
  Enable         Enable
Light Load Efficiency
Adjustable UVLO    
Enable
Light Load Efficiency
Adjustable UVLO    
Enable     Enable
Frequency Synchronization
Light Load Efficiency
Adjustable UVLO    
Enable     Enable
Light Load Efficiency
Adjustable UVLO    
Enable
Light Load Efficiency
Adjustable UVLO    
Enable
Light Load Efficiency
Adjustable UVLO    
Enable
Frequency Synchronization
Light Load Efficiency
Adjustable UVLO    
SIMPLE SWITCHER     SIMPLE SWITCHER     SIMPLE SWITCHER           SWIFT       SIMPLE SWITCHER            
  Current Mode         Current Mode     Current Mode     Voltage Mode     Current Mode     Voltage Mode     Current Mode     Current Mode     Current Mode     Current Mode    
  2         3.5     3.5     1.5     1     1.5     3.5     3.5     3.5     1    
Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog    
-40 to 125     -40 to 125     -40 to 125       -40 to 150     -40 to 150     -40 to 125     -40 to 125     -40 to 125     -40 to 150     -40 to 150     -40 to 150     -40 to 125    
6SOT     6SOT     6SOT     10WSON     8SO PowerPAD
8SOIC    
8SOIC     8SO PowerPAD     8SO PowerPAD     16WSON
8PDIP
8SOIC    
8SO PowerPAD     8SOIC     8SOIC     8SO PowerPAD    
0.85 | 1ku     0.80 | 1ku     0.95 | 1ku     0.85 | 1ku     0.60 | 1ku     0.55 | 1ku     1.85 | 1ku     1.68 | 1ku     1.60 | 1ku     0.73 | 1ku     0.55 | 1ku     0.55 | 1ku     2.10 | 1ku    

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WEBENCH® LM2736
    Min   Max   Range  
  Vin V    3.00 – 18.00V  
  Vout V    1.25 – 16.00V  
  Iout A    ≤ 0.75A  
  Ambient Temp °C    -40 – 125°C  
Footprint BOM Cost Efficiency
 
   
 
 
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