LM27342 2A - Wide Input Range Buck Regulator with Frequency Synchronization | TI.com

LM27342 (ACTIVE) 2A - Wide Input Range Buck Regulator with Frequency Synchronization

 

Recommended alternative parts

  • LM27341  -  1.5A Version
  • LM27341-Q1  -  1.5A Version
  • LM27342-Q1  - The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device. 
  • LM2738  -  1.5A Version, No Frequency Sync

Description

The LM2734x and LM2734x-Q1 regulators are monolithic, high-frequency, PWM step-down DC-DC converters in 10-pin WSON and 10-pin MSOP-PowerPAD packages. They contain 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, the LM2734x and LM2734x-Q1 are easy to use. The ability to drive 1.5-A or 2-A loads respectively, with an internal 150-mΩ NMOS switch results in the best power density available. The world-class control circuitry allows for on-times as low as 65 ns, thus supporting exceptionally high frequency conversion. Switching frequency is internally set to 2 MHz and synchronizable from 1 to 2.35 MHz, which allows the use of extremely small surface mount inductors and chip capacitors. Even though the operating frequency is very high, efficiencies up to 90% are easy to achieve. External shutdown is included, which features an ultra-low shutdown current of 70 nA. The LM2734x and LM2734x-Q1 use peak 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 overvoltage protection.

Features

  • Space-Saving, 3 mm × 3 mm 10-Pin WSON and MSOP-PowerPAD Packages
  • Wide Input Voltage Range: 3 V to 20 V
  • Wide Output Voltage Range: 1 V to 18 V
  • LM27341 Delivers 1.5-A Maximum Output Current
  • LM27342 Delivers 2-A Maximum Output Current
  • High Switching Frequency: 2 MHz
  • Frequency Synchronization:
    1 MHz < fSW < 2.35 MHz
  • 150-mΩ NMOS Switch With Internal Bootstrap Supply
  • 70-nA Shutdown Current
  • Internal Voltage Reference Accuracy of 1%
  • Peak Current-Mode, PWM Operation
  • Thermal Shutdown
  • LM27341-Q1 and LM27342-Q1 are AEC-Q100 Grade 1 Qualified and Manufactured on an Automotive Grade Flow

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WEBENCH® Designer LM27342

  Min   Max Range
Vin  V 3.0 to 20.0V
Vout  V 1 to 18V
Iout  A ≤ 2A
Ambient Temp  °C -40 to 125°C

Parametrics

Compare all products in Buck converters (integrated switch) Email Download to Excel
Part number Order Vin (Min) (V) Vin (Max) (V) Vout (Min) (V) Vout (Max) (V) Iout (Max) (A) Regulated outputs (#) Switching frequency (Min) (kHz) Switching frequency (Max) (kHz) Iq (Typ) (mA) Features Control mode Duty cycle (Max) (%) Operating temperature range (C) Rating Package Group Type Package size: mm2:W x L (PKG)
LM27342 Order now 3     20     1     18     2     1     1750     2300     2.4     Enable
Light Load Efficiency    
Current Mode     93     -40 to 125     Catalog     HVSSOP | 10
WSON | 10    
Converter     10HVSSOP: 15 mm2: 4.9 x 3 (HVSSOP | 10)
10WSON: 9 mm2: 3 x 3 (WSON | 10)    
LM27341 Samples not available 3     20     1     18     1.5     1     1750     2300     2.4     Enable
Light Load Efficiency    
Current Mode     93     -40 to 125     Catalog     HVSSOP | 10
WSON | 10    
Converter     10HVSSOP: 15 mm2: 4.9 x 3 (HVSSOP | 10)
10WSON: 9 mm2: 3 x 3 (WSON | 10)    
LM27342-Q1 Samples not available 3     20     1     18     2     1     1750     2300     2.4     Light Load Efficiency     Current Mode     93     -40 to 125     Automotive     HVSSOP | 10     Converter     10HVSSOP: 15 mm2: 4.9 x 3 (HVSSOP | 10)    
LM2738 Order now 3     20     0.8     18     1.5     1     550     1600     1.9     Enable
Light Load Efficiency    
Current Mode     95     -40 to 125     Catalog     HVSSOP | 8
WSON | 8    
Converter     8HVSSOP: 15 mm2: 4.9 x 3 (HVSSOP | 8)
8WSON: 9 mm2: 3 x 3 (WSON | 8)