LM5122-Q1 (ACTIVE)

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

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

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

All trademarks are the property of their respective owners.

View more

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 LM5020 LM5022 LM5022-Q1 LM5121 LM5121-Q1 LM5122 LM5150-Q1 LM51501-Q1 TPS40210-Q1 TPS40211-Q1
3    3    2.97    13    6    3    3    3    3    1.5    1.5    4.5    4.5   
65    42    48    100    60    60    65    65    65    42    42    52    52   
3    3    1.275    1.25    1.25    1.25    3    3    3    6.8    6.0    6.4    6.4   
100    50    500    300    300    300    100    100    100    10.5    11.5    300    60   
20    20    10    10    10    10    20    20    20    15    15    6    6   
1    1    1    1    1    1    1    1    1    1    1    1    1   
50    50    100    175    170    170    50    50    50    220    220    35    35   
1000    600    1000    1000    2200    2200    1000    1000    1000    2300    2300    1000    1000   
4    4    3.7    2    3.5    3.5    4    4    4    0.015    0.015    0.53    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
Pre-Bias Start-Up   
Enable
Frequency Synchronization
UVLO Adjustable   
Enable
Frequency Synchronization
UVLO Adjustable   
Adjustable Current Limit
Enable
Frequency Synchronization
Light Load Efficiency
Synchronous Rectification
UVLO Adjustable   
Enable
Frequency Synchronization   
Enable
Frequency Synchronization
Phase Interleaving
Synchronous Rectification
UVLO Adjustable   
Adjustable Current Limit
Enable
Frequency Synchronization
Light Load Efficiency   
Adjustable Current Limit
Enable
Frequency Synchronization
Light Load Efficiency   
Enable
Frequency Synchronization   
Enable
Frequency Synchronization   
20    20    10    10    10    10    20    20    20    15    15    6    6   
100    100    85    80    90    90    100    100    100    87    87    95    95   
-40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 150    -40 to 125    -40 to 125    -40 to 125   
Automotive    Automotive    Automotive        Automotive      Automotive      Automotive    Automotive    Automotive    Automotive   
HTSSOP    HTSSOP    VSSOP    VSSOP
WSON   
VSSOP    VSSOP    HTSSOP    HTSSOP    HTSSOP
HTSSOP   
WQFN    WQFN    MSOP-PowerPAD    MSOP-PowerPAD   

Other qualified versions of LM5122-Q1

Version Part Number Definition
Catalog LM5122 TI's standard catalog product
New! Interactive Design
Click to instantly view a schematic, charts, Bill of Materials, and Operating Values.

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


Footprint BOM Cost Efficiency


Preview design