LM5141-Q1 Wide-Input 2.2MHz Low-Iq Synchronous Buck Controller | TI.com

LM5141-Q1
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Wide-Input 2.2MHz Low-Iq Synchronous Buck Controller

 

Description

The LM5141-Q1 is a synchronous buck controller, intended for high voltage wide VIN step-down converter applications. The control method is peak current mode control. Current mode control provides inherent line feed-forward, cycle-by-cycle current limiting, and ease-of-loop compensation. The LM5141-Q1 features slew rate control to simplify the compliance with CISPR and automotive EMI requirements.

The LM5141-Q1 has two selectable switching frequencies: 2.2 MHz and 440 kHz. Gate drivers with slew rate Control that can be adjusted to reduce EMI.

In light or no-load conditions, the LM5141-Q1 operates in skip cycle mode for improved low power efficiency. The LM5141-Q1 has a high voltage bias regulator with automatic switch-over to an external bias to reduce the IQ current from VIN. Additional features include frequency synchronization, cycle-by-cycle current limit, hiccup mode fault protection for sustained overload, and power good output.

Features

  • Qualified for Automotive Applications
  • 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 C4B
  • VIN: 3.8 V to 65 V (70 V Absolute Maximum)
  • Output: Fixed 3.3 V, 5 V, or Adjustable From
    1.5 V to 15 V with ±0.8% Accuracy
  • Fixed 2.2-MHz or 440-kHz Switching Frequency with ±5% Accuracy
  • High-Side and Low-Side Gate Drive With Slew-Rate Control
  • Optional Frequency Shift by Varying an Analog Voltage or RT Resistor
  • Optional Synchronization to an External Clock
  • Optional Spread Spectrum
  • Shutdown Mode IQ: 10 µA Typical
  • Low Standby Mode IQ: 35 µA Typical
  • 75-mV Current Limit Threshold with ±0.9% Accuracy
  • External Resistor or DCR Current Sensing
  • Output Enable Logic Input
  • Hiccup Mode for Sustained Overload
  • Power-Good Indication Output
  • Selectable Diode Emulation or Forced Pulse-Width Modulation
  • 24-pin VQFN Package With Wettable Flanks
  • Create a Custom Design Using the LM5141-Q1 With the WEBENCH® Power Designer

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WEBENCH® Designer LM5141-Q1

  Min   Max Range
Vin  V 3.8 to 65.0V
Vout  V 1.5 to 15V
Iout  A ≤ 10A
Ambient Temp  °C -40 to 125°C

Parametrics

Compare all products in Buck controllers (external 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 (#) Number of Phases Switching frequency (Min) (kHz) Switching frequency (Max) (kHz) Iq (Typ) (mA) Features Duty cycle (Max) (%) Operating temperature range (C) Rating Package Group Type Control mode
LM5141-Q1 Order now 3.8     65     1.5     15     20     1     1     350     2600     0.035     Adjustable Current Limit
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Spread Spectrum
Synchronous Rectification
Tracking
UVLO Fixed    
78     -40 to 150     Automotive     VQFN | 24     Controller     Current Mode    
LM25117-Q1 Order now 4.5     42     0.8     41     20     1     1     50     750     4.8     Adjustable Current Limit
Enable
Frequency Synchronization
Light Load Efficiency
Synchronous Rectification
Tracking
UVLO Adjustable    
98     -40 to 125     Automotive     HTSSOP | 20
WQFN | 24    
Controller     Current Mode    
LM25119Q Order now 4.5     42     0.8     41.3     40     2     2     50     750     6     Adjustable Current Limit
Enable
Frequency Synchronization
Light Load Efficiency
Synchronous Rectification
UVLO Adjustable    
98     -40 to 125     Automotive     WQFN | 32     Controller     Current Mode    
LM5117-Q1 Order now 5.5     65     0.8     62     20     1     1     50     750     4.8     Adjustable Current Limit
Enable
Frequency Synchronization
Light Load Efficiency
Synchronous Rectification
Tracking
UVLO Adjustable    
98     -40 to 125     Automotive     HTSSOP | 20
WQFN | 24    
Controller     Current Mode    
LM5119Q Order now 5.5     65     0.8     64     15     2