Gated-Oscillator-Based Automotive DC-DC Boost Converter - LM2623-Q1

LM2623-Q1 (ACTIVE)

Gated-Oscillator-Based Automotive DC-DC Boost Converter

 

Description

The LM2623-Q1 is a high-efficiency, general-purpose, step-up DC-DC switching regulator for automotive systems. The device accepts an input voltage between 0.9 V and 14 V and converts it into a regulated output voltage between 1.24 V and 14 V.

In order to adapt to a number of applications, the LM2623-Q1 allows the designer to program the output voltage, the operating frequency (300 kHz to 2 MHz), and duty cycle (17% to 90%) to optimize performance. The selected values can be fixed or can vary with input voltage or input-to-output voltage ratio. The LM2623-Q1 uses a very simple, on/off regulation mode to produce good efficiency and stable operation over a wide operating range. The device normally regulates by skipping switching cycles when it reaches the regulation limit (pulse frequency modulation (PFM)).

Refer to Non-Linear Effect and Choosing the Correct C3 Capacitor to resolve any design challenges before board design is finalized.

Features

  • AEC-Q100 Qualified for Automotive Applications:
    • Device Temperature Grade 1: –40°C to 125°C Ambient Operating Temperature
    • Device HBM ESD Classification Level 2
    • Device CDM ESD Classification Level C4A
  • Good Efficiency Over a Very Wide Load Range
  • Very Low Output Voltage Ripple
  • Up to 2-MHz Switching Frequency
  • 0.9-V to 14-V Operating Voltage
  • 1.1-V Start-Up Voltage
  • 1.24-V to 14-V Adjustable Output Voltage
  • 0.17-Ω Internal MOSFET
  • Up to 90% Regulator Efficiency
  • 80-µA Typical Operating Current (Into VDD Pin of Supply)
  • Low Shutdown Current (IQ < 2.5 µA)
  • 4-mm × 4-mm Thermally Enhanced WSON Package Option

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Parametrics Compare all products in Boost Converter (Integrated 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
LM2623-Q1 LM2735-Q1 TPS61085-Q1 TPS61087-Q1 TPS61093-Q1 TPS61175-Q1
1.0    2.7    2.3    2.5    1.6    2.9   
14    5.5    6    6    6    18   
1.24    3    2.8    3    1.7    2.9   
14    24    18.5    18.5    17    38   
  2.25    2.6    4    1.1    3.8   
1    1    1    1    1    1   
300      480    900      160   
2000      1500    1500    1400    2640   
0.11    7    0.07    0.075    0.9    3   
Enable    Enable    Enable
Light Load Efficiency   
Enable
Frequency Synchronization
Power Good   
Enable
Output Discharge   
Enable
Frequency Synchronization
Light Load Efficiency   
2             
90      89    90    93    93   
-40 to 125    -40 to 125    -40 to 105    -40 to 125    -40 to 125    -40 to 125   
Automotive    Automotive    Automotive    Automotive    Automotive    Automotive   
WSON    SOT-23
WSON   
VSSOP    VSON    SON    HTSSOP