LM2735-Q1 520kHz/1.6MHz space eEfficient boost and SEPIC DC-DC regulator, AEC-Q100 qualified | TI.com

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520kHz/1.6MHz space eEfficient boost and SEPIC DC-DC regulator, AEC-Q100 qualified


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


The LM2735-Q1 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%. The device can be used as a post-boost, boosting from the main automotive system 3.3V rail to power CAN transceivers and other circuits requiring 5V. The 24V output capability allows the LM2735-Q1 to power audio amplifiers, antenna, power-over-coax (PoC), and automotive audio bus (A2B) devices as well.

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 and WSON packages provide space savings. Additional features include internal soft start, circuitry to reduce inrush current, pulse-by-pulse current limit, and thermal shutdown.


  • AEC-Q100 Qualified for Automotive Applications:
    • Device Temperature Grade 1: –40°C to +125°C Ambient Operating Range
  • 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 and WSON Packages
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Part Number
  Min   Max Range
Vin  V
Vout  V
Iout  A
Ambient Temp  °C -40 to 150°C


Compare all products in Boost converters (integrated switch) Email Download to Excel
Part number Order 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-Q1 Order now 2.7     5.5     3     24     2.25     1     520     1600     7     Enable     99     -40 to 125     Converter     Automotive     SOT-23 | 5
WSON | 6    
LM2621 Order now 1.2     14     1.24     14     2.85     1     2000     2000     0.08     Enable     80     -40 to 85     Converter     Catalog     VSSOP | 8    
LM2623 Order now 0.8     14     1.24     14     2.85     1     300     2000     0.08     Enable     90     -40 to 85     Converter     Catalog     VSSOP | 8
WSON | 14    
LM2623-Q1 Order now 1     14     1.24     14     2.85     1     300     2000     0.11     Enable     90     -40 to 125     Converter     Automotive     WSON | 14    
LM2731 Order now 2.7     14     1.23     22     1.5     1     600     1600     2     Enable     93     -40 to 125     Converter     Catalog     SOT-23 | 5    
LM27313 Order now 2.7     14     4     28