TPS7B4254-Q1 Automotive 150mA 40V Voltage-Tracking LDO With 4mV Tracking Tolerance | TI.com

TPS7B4254-Q1
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Automotive 150mA 40V Voltage-Tracking LDO With 4mV Tracking Tolerance

 

Description

For automotive off-board sensors and low-current off-board modules, the power supply is through a long cable from the main board. In such cases, protection is required in the power devices for the off-board loads to prevent the onboard components from damage during a short to GND or short to battery caused by a broken cable. Off-board sensors require a power supply as consistent as that for onboard components to secure high accuracy of data acquisition.

The TPS7B4254-Q1 device is designed for automotive applications with a 45-V load dump. The device can either be used as one tracking low-dropout (LDO) regulator or as a voltage tracker to build one closed power loop for off-board sensors with an onboard main supply. The output of the device is accurately regulated by a reference voltage at the ADJ pin.

To provide an accurate power supply to the off-board modules, the device offers a 4-mV ultralow tracking tolerance between the ADJ and FB pins across temperature. The back-to-back PMOS topology eliminates the need for an external diode under a reverse-polarity condition. The TPS7B4254-Q1 device also includes thermal shutdown, inductive clamp, overload, and short-to-battery protection to prevent damage to onboard components during extreme conditions.

Features

  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results
    • Device Temperature Grade 1: –40°C to 125°C Ambient Operating Temperature Range
    • Device HBM ESD Classification Level 3A
    • Device CDM ESD Classification Level C6
  • –40-V to 45-V Wide Input-Voltage Range (Maximum)
  • Output-Voltage Adjust Range: 2 V to 40 V
  • 150-mA Output Current Capability
  • Very Low Output-Tracking Tolerance, ±4 mV
  • 160-mV Low-Dropout Voltage When IOUT = 100 mA
  • Low Quiescent Current (I(Q)):
    • < 4 µA When ADJ = LOW
    • 60 µA Typical at Light Load
  • Extremely Wide ESR Range
    • 10-µF to 500-µF Ceramic Output Capacitor
    • ESR Range from 1 mΩ to 20 Ω
  • Reverse Polarity Protection
  • Current-Limit and Thermal-Shutdown Protection
  • Output Short-Circuit-Proof to Ground and Supply
  • Inductive Clamp at OUT Pin
  • 8-Pin SO PowerPAD Package With Exposed Thermal Pad

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Thermal calculator

Estimate the LDO IC temperature at your design conditions:
Part number
    Range
Vin  V
Vout  V
Iout  A
Ambient temp  °C
Package option
Voltage option
PCB construction
Enhanced Thermal = single thermal spreading plane of 1 oz Cu
Minimum Thermal = single thermal spreading plane of 1/2 oz Cu
View the user guide for more details.

Junction temperature vs. PCB copper coverage area
These are estimated power dissipation and thermal results.
Care must be taken to ensure that device junction temperature
does not exeed the maximum ratings as indicated in the datasheet.

This calculator uses the PCB copper area to estimate the device junction temperature. See notes on usage and calculation method.

Parametrics

Compare all products in Linear regulators (LDO) Email Download to Excel
Part number Order Output options Iout (Max) (A) Vin (Max) (V) Vin (Min) (V) Vout (Max) (V) Vout (Min) (V) Package Group Features Regulated outputs (#) Operating temperature range (C) Thermal resistance θJA (°C/W) Approx. price (US$) Rating PSRR @ 100 KHz (dB) Accuracy (%) Dropout voltage (Vdo) (Typ) (mV) Iq (Typ) (mA) Package size: mm2:W x L (PKG)
TPS7B4254-Q1 Order now Adjustable Output
Tracking Output    
0.15     40     4     40     2     SO PowerPAD | 8     Reverse Current Protection
Reverse Voltage Protection    
1     -40 to 125     45     0.70 | 1ku     Automotive     43       160     0.06     8SO PowerPAD: 19 mm2: 3.9 x 4.89 (SO PowerPAD | 8)    
TPS7B4250-Q1 Order now Adjustable Output
Tracking Output    
0.05     40     4     18     1.5     SOT-23 | 5     Reverse Current Protection
Reverse Voltage Protection    
1     -40 to 125     172     0.40 | 1ku     Automotive     60       250     0.04     5SOT-23: 5 mm2: 1.6 x 2.9 (SOT-23 | 5)    
TPS7B4253-Q1 Order now Adjustable Output
Tracking Output    
0.3     40     4     40     1.5     HTSSOP | 20
SO PowerPAD | 8    
Enable
Reverse Current Protection
Reverse Voltage Protection    
1     -40 to 125     45     0.85 | 1ku     Automotive     60       350     0.04     20HTSSOP: 42 mm2: 6.4 x 6.5 (HTSSOP | 20)
8SO PowerPAD: 19 mm2: 3.9 x 4.89 (SO PowerPAD | 8)    
TPS7B7701-Q1 Order now Adjustable Output     0.3     40     4     20     1.5     HTSSOP | 16     Adjustable Current Limit
Current Sense
Enable
Power Good
Reverse Current Protection
Reverse Voltage Protection    
1     -40 to 125     40     1.00 | 1ku     Automotive     60     2     350     0.6