LM5088 4.5-75V Wide Vin, Current Mode Non-Synchronous Buck Controller | TI.com

LM5088
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4.5-75V Wide Vin, Current Mode Non-Synchronous Buck Controller

 

Description

The LM5088 high voltage non-synchronous buck controller features all the necessary functions to implement an efficient high voltage buck converter using a minimum number of external components. The LM5088 can be configured to operate over an ultra-wide input voltage range of 4.5 V to 75 V. This easy to use controller includes a level shifted gate driver capable of controlling an external N-channel buck switch. The control method is based upon peak current mode control utilizing an emulated current ramp. The use of an emulated control ramp reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of very small duty cycles necessary in high input voltage/low output voltage applications. The LM5088 switching frequency is programmable from 50 kHz to 1 MHz.

The LM5088 is available in two versions: The LM5088-1 provides a +/-5% frequency dithering function to reduce the conducted and radiated EMI, while the LM5088-2 provides a versatile restart timer for overload protection. Additional features include a low dropout bias regulator, tri-level enable input to control shutdown and standby modes, soft-start and oscillator synchronization capability. The device is available in a thermally enhanced HTSSOP-16 pin package.

Features

  • LM5088-Q1 is an Automotive Grade Product
    that is AEC-Q100 Grade 1 Qualified
    (–40°C to +125°C Operating Junction Temperature)
  • Emulated Current Mode Control
  • Drives External High-Side N-channel MOSFET
  • Ultra-Wide Input Voltage Range from 4.5V to 75V
  • Low IQ Shutdown and Standby Modes
  • High Duty Cycle Ratio Feature for Reduced
    Dropout Voltage
  • Spread Spectrum EMI Reduction (LM5088-1)
  • Hiccup Timer for Overload Protection (LM5088-2)
  • Adjustable Output Voltage from 1.205 V with
    1.5% Feedback
    Reference Accuracy
  • Wide Bandwidth Error Amplifier
  • Single Resistor Oscillator Frequency Setting
  • Oscillator Synchronization Capability
  • Programmable Soft-Start
  • High Voltage, Low Dropout Bias Regulator
  • Thermal Shutdown Protection
  • Package: HTSSOP (16 Pin)

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WEBENCH® Designer LM5088

  Min   Max Range
Vin  V 4.5 to 75.0V
Vout  V 1.25 to 75V
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
LM5088 Order now 4.5     75     1.205     70     10     1     1     50     1000     3.8     Adjustable Current Limit
Enable
Frequency Synchronization
Spread Spectrum    
100     -40 to 125     Catalog     HTSSOP | 16     Controller     Current Mode    
LM25088 Order now 4.5     42     1.205     40     10     1     1     50     1000     3.2     Enable
Frequency Synchronization    
95     -40 to 125     Catalog     HTSSOP | 16     Controller     Current Mode    
LM25088-Q1 Order now 4.5     42     1.205     40     10     1     1     50     1000     3.2     Enable
Frequency Synchronization    
95     -40 to 125     Automotive     HTSSOP | 16     Controller     Current Mode    
LM5088-Q1 Order now 4.5     75     1.205     70     10     1     1     50     1000     3.8     Adjustable Current Limit
Enable
Frequency Synchronization    
100     -40 to 125     Automotive     HTSSOP | 16     Controller     Current Mode    
LM5116 Order now 6     100     1.215     80     20     1     1     50     1000     4.6     Adjustable Current Limit
Enable
Frequency Synchronization
Light Load Efficiency
Synchronous Rectification
UVLO Adjustable    
98     -40 to 150     Catalog