LM2735 520kHz/1.6MHz - Space-Efficient Boost and SEPIC DC-DC Regulator | TI.com

LM2735 (ACTIVE)

520kHz/1.6MHz - Space-Efficient Boost and SEPIC DC-DC Regulator

520kHz/1.6MHz - Space-Efficient Boost and SEPIC DC-DC Regulator - LM2735
Datasheet
LM2735 520-kHz and 1.6-MHz Space-Efficient Boost and SEPIC DC/DC Regulator datasheet (Rev. I)
 

Recommended alternative parts

  • LM2735-Q1  - The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device. 

Description

The LM2735 device is an easy-to-use, space-efficient 2.1-A low-side switch regulator, ideal for Boost and SEPIC DC/DC regulation. The device provides all the active functions to provide local DC-DC conversion with fast-transient response and accurate regulation in the smallest PCB area. Switching frequency is internally set to either 520 kHz or 1.6 MHz, allowing the use of extremely small surface mount inductor and chip capacitors, while providing efficiencies of up to 90%. Current-mode control and internal compensation provide ease-of-use, minimal component count, and high-performance regulation over a wide range of operating conditions. External shutdown features an ultra-low standby current of 80 nA, ideal for portable applications. Tiny SOT-23, WSON, and MSOP-PowerPAD packages provide space savings. Additional features include internal soft start, circuitry to reduce inrush current, pulse-by-pulse current limit, and thermal shutdown.

Features

  • Input Voltage Range: 2.7 V to 5.5 V
  • Output Voltage Range: 3 V to 24 V
  • 2.1-A Switch Current Over Full Temperature Range
  • Current-Mode Control
  • Logic High Enable Pin
  • Ultra-Low Standby Current of 80 nA in Shutdown
  • 170-mΩ NMOS Switch
  • ±2% Feedback Voltage Accuracy
  • Ease-of-Use, Small Total Solution Size
    • Internal Soft Start
    • Internal Compensation
    • Two Switching Frequencies
    • 520 kHz (LM2735-Y)
    • 1.6 MHz (LM2735-X)
    • Uses Small Surface Mount Inductors and Chip Capacitors
    • Tiny SOT-23, WSON, and MSOP-PowerPAD™ Packages
  • Create a Custom Design Using the LM2735 With WEBENCH® Power Designer

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Parametrics Compare all products in Boost converters (integrated switch)

 
Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Switch Current Limit (Typ) (A)
Regulated outputs (#)
Switching Frequency (Min) (kHz)
Switching Frequency (Max) (kHz)
Iq (Typ) (mA)
Features
Duty cycle (Max) (%)
Operating temperature range (C)
Type
Rating
Package Group
LM2735 LM2621 LM2623 LM2731 LM27313 LM2733 LM2735-Q1 TLV61046A TPS55340 TPS61040 TPS61085 TPS61087 TPS61170
2.7     1.2     0.8     2.7     2.7     2.7     2.7     1.8     2.9     1.8     2.3     2.5     3    
5.5     14     14     14     14     14     5.5     5.5     32     6     6     6     18    
3     1.24     1.24     1.23     4     3     3     3.3     3     1.8     2.8     3     3    
24     14     14     22     28     40     24     28     38     28     18.5     18.5     38    
2.25     2.85     2.85     1.5     1.25     1.5     2.25     0.9     6.6     0.4     2.6     4     1.2    
1     1     1     1     1     1     1     1     1     1     1     1     1    
520     2000     300     600     1150     400     520     850     100     50     480     900     1000    
1600     2000     2000     1600     1900     1850     1600     1250     1200     1000     1500     1500     1200    
7     0.08     0.08     2     2.1     1.1     7     0.11     0.5     0.028     0.07     0.075     2.3    
Enable     Enable     Enable     Enable     Enable
Light Load Efficiency    		 Enable
Light Load Efficiency    		 Enable     Enable
Light Load Efficiency
Load Disconnect    		 Enable
Frequency Synchronization
Light Load Efficiency    		 Enable     Enable     Enable
Power Good    		 Enable
Light Load Efficiency    
99     80     90     93