TPS55340 Integrated, 5-A 40-V Wide Input Range Boost/SEPIC/Flyback DC-DC Regulator |

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Integrated, 5-A 40-V Wide Input Range Boost/SEPIC/Flyback DC-DC Regulator



The TPS55340 is a monolithic, nonsynchronous, switching regulator with integrated 5-A, 40-V power switch. The device can be configured in several standard switching-regulator topologies, including boost, SEPIC, and isolated flyback. The device has a wide input voltage range to support applications with input voltage from multicell batteries or regulated
3.3-V, 5-V, 12-V, and 24-V power rails.

The TPS55340 regulates the output voltage with current mode PWM (pulse width modulation) control, and has an internal oscillator. The switching frequency of PWM is set by either an external resistor or by synchronizing to an external clock signal. The user can program the switching frequency from
100 kHz to 1.2 MHz.

The device features a programmable soft-start function to limit inrush current during start-up and has other built-in protection features including cycle-by-cycle overcurrent limit and thermal shutdown.

The TPS55340 is available in a small 3-mm × 3-mm 16-pin QFN as well as 14-pin HTSSOP packages with PowerPAD for enhanced thermal performance.

The 5-A, 40-V TPS55340 boost converter in the HTSSOP-14 package is pin-to-pin compatible with the 3-A, 40-V TPS61175, and it extends the maximum input voltage from 18 V to 32 V.


  • Internal 5-A, 40-V Low-Side MOSFET Switch
  • 2.9-V to 32-V Input Voltage Range
  • ±0.7% Reference Voltage
  • 0.5-mA Operating Quiescent Current
  • 2.7-µA Shutdown Supply Current
  • Fixed Frequency Current Mode PWM Control
  • Frequency Adjustable From 100 kHz to 1.2 MHz
  • Synchronization Capability to External Clock
  • Adjustable Soft-Start Time
  • Pulse Skipping for Higher Efficiency at Light Loads
  • Cycle-by-Cycle Current Limit, Thermal Shutdown, and UVLO Protection
  • QFN-16 (3-mm × 3-mm) and HTSSOP-14 Packages With PowerPAD™
  • Wide –40°C to 150°C Operating TJ Range
  • Create a Custom Design Using the TPS55340 with the WEBENCH Power Designer

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WEBENCH® Power Designer is now even easier to use. Try it now.

WEBENCH® Designer TPS55340

  Min   Max Range
Vin  V 2.7 to 32.0V
Vout  V 2.7 to 38V
Iout  A ≤ 5A
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
TPS55340 Order now 2.9     32     3     38     6.6     1     100     1200     0.5     Enable
Frequency Synchronization
Light Load Efficiency    
90     -40 to 150     Converter     Catalog     HTSSOP | 14
WQFN | 16    
LM2585 Order now 4     40     1.23     60     4     1     85     115     11       98     -40 to 125     Converter     Catalog     DDPAK/TO-263 | 5
TO-220 | 5    
LM2586 Order now 4     40     1.23     60     4     1     75     125     11     Enable
Frequency Synchronization    
98     -40 to 125     Converter     Catalog     DDPAK/TO-263 | 7
TO-220 | 7    
LM2587 Order now 4     40     1.23     60     6.5     1     85     115     11       98     -40 to 125     Converter     Catalog     DDPAK/TO-263 | 5
TO-220 | 5    
LM2621 Order now 1.2     14     1.24     14     2.85     1     2000     2000     0.08     Enable     80     -40 to 85     Converter     Catalog