Automotive Grade, 3-65V Wide Vin, Current Mode Synchronous Boost Controller with Multiphase Capabili - LM5122-Q1

LM5122-Q1 (ACTIVE)

Automotive Grade, 3-65V Wide Vin, Current Mode Synchronous Boost Controller with Multiphase Capabili

 

Description

The LM5122 is a multi-phase 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 1 MHz. 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
    • Device HBM ESD Classification Level 2
    • Device CDM ESD Classification Level C6
  • Maximum Input Voltage: 65 V
  • Minimum Input Voltage: 3 V (4.5 V for Start-Up)
  • Output Voltage up to 100 V
  • Bypass (VOUT = VIN) Operation
  • 1.2-V Reference with ±1% Accuracy
  • Free-Run and Synchronizable Switching to 1 MHz
  • 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
  • Multi-phase Capability
  • Thermally Enhanced 20-Pin HTSSOP
  • Create a Custom Design Using the LM5122 With the WEBENCH® Power Designer

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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
LM5122-Q1 LM25122-Q1 LM3481-Q1 LM5022-Q1 LM5121-Q1 LM5150-Q1 TPS40211-Q1
3    3    2.97    3    3    1.5    4.5   
65    42    48    60    65    42    52   
3    3    1.275    1.25    3    6.8    6.4   
100    50    500    300    100    10.5    60   
20    20    10    10    20    15    6   
1    1    1    1    1    1    1   
50    50    100    170    50    220    35   
1000    600    1000    2200    1000    2300    1000   
4    4    3.7    3.5    4    1.8    0.53   
Enable
Frequency Synchronization
Phase Interleaving
Synchronous Rectification
UVLO Adjustable   
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   
Adjustable Current Limit
Enable
Frequency Synchronization
Light Load Efficiency   
Enable
Frequency Synchronization   
20    20    10    10    20    15    6   
100    100    85    90    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    HTSSOP    VSSOP    VSSOP    HTSSOP    WQFN    MSOP-PowerPAD   

Other qualified versions of LM5122-Q1

Version Part Number Definition
Catalog LM5122 TI's standard catalog product
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WEBENCH® Designer LM5122-Q1

  Min   Max Range
Vin  V 4.5 to 65.0V
Vout  V 4.5 to 100V
Iout  A ≤ 20A
Ambient Temp  °C -40 to 125°C


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