40V Wide Vin Low-Side N-Channel Controller for Switching Regulators - LM3488

LM3488 (ACTIVE)

40V Wide Vin Low-Side N-Channel Controller for Switching Regulators

 

Description

The LM3488 is a versatile low-side N-FET high-performance controller for switching regulators. This device is suitable for use in topologies requiring low-side FET, such as boost, flyback, or SEPIC. Moreover, the LM3488 can be operated at extremely high switching frequency to reduce the overall solution size. The switching frequency of LM3488 can be adjusted to any value from 100 kHz to 1 MHz by using a single external resistor or by synchronizing it to an external clock. Current mode control provides superior bandwidth and transient response, besides cycle-by-cycle current limiting. Output current can be programmed with a single external resistor.

The LM3488 has built-in features such as thermal shutdown, short-circuit protection, and overvoltage protection. Power-saving shutdown mode reduces the total supply current to 5 µA and allows power supply sequencing. Internal soft-start limits the inrush current at start-up.

Features

  • Automotive Grade Product, AEC-Q100 Qualified
  • 8-Lead VSSOP Package
  • Internal Push-Pull Driver With 1-A Peak Current Capability
  • Current Limit and Thermal Shutdown
  • Frequency Compensation Optimized With a Capacitor and a Resistor
  • Internal Soft-Start
  • Current Mode Operation
  • Undervoltage Lockout With Hysteresis
  • Key Specifications:
    • Wide Supply Voltage Range of 2.97 V to 40 V
    • 100-kHz to 1-MHz Adjustable and Synchronizable Clock Frequency
    • ±1.5% (Overtemperature) Internal Reference
    • 5-µA Shutdown Current (Overtemperature)
  • Create a Custom Design Using the LM3488 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
LM3488 LM3017 LM3478 LM3481 LM5022
2.97    5    2.97    2.97    6   
40    18    40    48    60   
1.26    6    1.26    1.275    1.25   
500    20    500    500    300   
10    1    10    10    10   
1    1    1    1    1   
100    400    100    100    170   
1000    400    1000    1000    1000   
2.7    0.001    2.7    3.7    3.5   
Adjustable Current Limit
Enable
Frequency Synchronization
Light Load Efficiency
Pre-Bias Start-Up   
Enable
Load Disconnect   
Adjustable Current Limit
Enable
Frequency Synchronization
Light Load Efficiency
Pre-Bias Start-Up   
Adjustable Current Limit
Enable
Frequency Synchronization
Light Load Efficiency
Pre-Bias Start-Up
UVLO Adjustable   
Enable
Frequency Synchronization
UVLO Adjustable   
10    1    10    10    10   
100    85    100    85    90   
-40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 125   
Catalog    Catalog    Catalog    Catalog    Catalog   
VSSOP    WQFN    SOIC
VSSOP   
VSSOP    VSSOP   
New! Interactive Design
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WEBENCH® Designer LM3488

  Min   Max Range
Vin  V 2.97 to 40.0V
Vout  V 1.26 to 300V
Iout  A ≤ 20A
Ambient Temp  °C -40 to 125°C


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