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

LM25122-Q1 (ACTIVE)

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

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

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 180º 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 LM5020 LM5022 LM5022-Q1 LM5121 LM5121-Q1 LM5122 LM5122-Q1 LM5122ZA LM5150-Q1 LM51501-Q1 TPS40210-Q1 TPS40211-Q1
3     2.97     13     6     3     3     3     3     3     3     1.5     1.5     4.5     4.5    
42     48     100     60     60     65     65     65     65     65     42     42     52     52    
3     1.275     1.25     1.25     1.25     3     3     3     3     3     6.8     6.0     6.4     6.4    
50     500     300     300     300     100     100     100     100     100     10.5     11.5     300     60    
20     10     10     10     10     20     20     20     20     20     15     15     6     6    
1     1     1     1     1     1     1     1     1     1     1     1     1     1    
50     100     175     170     170     50     50     50     50     50     220     220     35     35    
600     1000     1000     2200     2200     1000     1000     1000     1000     1000     2300     2300     1000     1000    
4     3.7     2     3.5     3.5     4     4     4     4     4     0.015     0.015     0.53     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
Pre-Bias Start-Up    
Enable
Frequency Synchronization
UVLO Adjustable    
Enable
Frequency Synchronization
UVLO Adjustable    
Adjustable Current Limit
Enable