LM2623-Q1 Gated-Oscillator-Based Automotive DC-DC Boost Converter | TI.com

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

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Part number Order 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 Duty cycle (Max) (%) Operating temperature range (C) Type Rating Package Group
LM2623-Q1 Order now 1     14     1.24     14     2.85     1     300     2000     0.11     Enable     90     -40 to 125     Converter     Automotive     WSON | 14    
LM2735-Q1 Order now 2.7     5.5     3     24     2.25     1     520     1600     7     Enable     99     -40 to 125     Converter     Automotive     SOT-23 | 5
WSON | 6    
TPS61085A-Q1 Order now 2.3     6     2.8     18.5     2.6     1     480     1500     0.07     Enable
Light Load Efficiency
UVLO Fixed    
89     -40 to 125     Converter     Automotive     VSSOP | 8    
TPS61087-Q1 Order now 2.5     6     3     18.5     4     1     900     1500     0.075     Enable
Power Good    
90     -40 to 125     Converter     Automotive     VSON | 10    
TPS61088-Q1 Order now 2.7     12     4.5     12.6     11.4     1     200     2200     0.11     Adjustable Current Limit
Enable
Light Load Efficiency
Synchronous Rectification    
90     -40 to 125     Converter     Automotive     VQFN | 20    
TPS61093-Q1 Order now 1.6     6     1.7     17     1.1     1     1200     1200     0.9     Enable
Output Discharge    
93     -40 to 125     Converter     Automotive