Automotive Grade, 3-42V Wide Vin, Synchronous Boost Controller with Multiphase Capability - LM25122-Q1

LM25122-Q1 (ACTIVE)

Automotive Grade, 3-42V Wide Vin, Synchronous Boost Controller with Multiphase Capability

 

Description

The LM25122 is a multiphase capable synchronous boost controller intended for high-efficiency synchronous boost regulator applications. The control method is based upon peak current mode control. Current mode control provides inherent line feed-forward, cycle-by-cycle current limiting and ease of loop compensation.

The switching frequency is programmable up to 600 kHz. Higher efficiency is achieved by two robust N-channel MOSFET gate drivers with adaptive dead-time control. A user-selectable diode emulation mode also enables discontinuous mode operation for improved efficiency at light load conditions.

An internal charge pump allows 100% duty cycle for high-side synchronous switch (Bypass operation). A 180° phase shifted clock output enables easy multi-phase interleaved configuration. Additional features include thermal shutdown, frequency synchronization, hiccup mode current limit and adjustable line undervoltage lockout.

Features

  • AEC-Q100 Qualified with the following results:
    • Device Temperature Grade 1: –40°C to +125°C
      Ambient Operating Temperature Range
    • Device HBM ESD Classification Level 2
    • Device CDM ESD Classification Level C6
  • Maximum Input Voltage : 42 V
  • Min Input Voltage : 3 V (4.5 V for startup)
  • Output Voltage up to 50 V
  • Bypass (VOUT = VIN) Operation
  • 1.2 V Reference with ±1.0% Accuracy
  • Free-Run and Synchronizable Switching to 600 kHz
  • Peak Current Mode Control
  • Robust 3 A Integrated Gate Drivers
  • Adaptive Dead-Time Control
  • Optional Diode Emulation Mode
  • Programmable Cycle-by-Cycle Current Limit
  • Hiccup Mode Overload Protection
  • Programmable Line UVLO
  • Programmable Soft-Start
  • Thermal Shutdown Protection
  • Low Shutdown Quiescent Current: 9 µA
  • Programmable Slope Compensation
  • Programmable Skip Cycle Mode Reduces
    Standby Power
  • Allows External VCC Supply
  • Inductor DCR Current Sensing Capability
  • Multiphase Capability
  • Thermally Enhanced 20-Pin HTSSOP

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Parametrics Compare all products in Boost Controller (External 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
Iout (Max) (A)
Duty Cycle (Max) (%)
Operating Temperature Range (C)
Rating
Package Group
LM25122-Q1 LM3481-Q1 LM5022-Q1 LM5121-Q1 LM5122-Q1 LM5150-Q1 TPS40211-Q1
3    2.97    3    3    3    1.5    4.5   
42    48    60    65    65    42    52   
3    1.275    1.25    3    3    6.8    6.4   
50    500    300    100    100    10.5    60   
20    10    10    20    20    15    6   
1    1    1    1    1    1    1   
50    100    170    50    50    220    35   
600    1000    2200    1000    1000    2300    1000   
4    3.7    3.5    4    4    1.8    0.53   
Enable
Frequency Synchronization
Phase Interleaving
Synchronous Rectification   
Adjustable Current Limit
Enable
Frequency Synchronization
Light Load Efficiency
Pre-Bias Start-Up
UVLO Adjustable   
Enable
Frequency Synchronization
UVLO Adjustable   
Enable
Frequency Synchronization   
Enable
Frequency Synchronization
Phase Interleaving
Synchronous Rectification
UVLO Adjustable   
Adjustable Current Limit
Enable
Frequency Synchronization
Light Load Efficiency   
Enable
Frequency Synchronization   
20    10    10    20    20    15    6   
100    85    90    100    100    87    95   
-40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 150    -40 to 125   
Automotive    Automotive    Automotive    Automotive    Automotive    Automotive    Automotive   
HTSSOP    VSSOP    VSSOP    HTSSOP    HTSSOP    WQFN    MSOP-PowerPAD