TPS7B4253-Q1 Automotive 300-mA 40-V voltage-tracking LDO with 4-mV tracking tolerance | TI.com

TPS7B4253-Q1
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Automotive 300-mA 40-V voltage-tracking LDO with 4-mV tracking tolerance

 

Description

For automotive off-board sensors and small 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 consistent power supply as onboard components to secure high accuracy of data acquisition.

The TPS7B4253-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 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 reverse polarity condition. The TPS7B4253-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 to 45-V Wide Input-Voltage Range (Maximum)
  • Output Voltage Adjusts Down to:
    • 1.5 to 40 V (HTSSOP)
    • 2 to 40 V (SO PowerPAD™)
  • 300-mA Output Current Capability
  • Very-Low Output Tracking Tolerance, ±4 mV
  • 320-mV Low Dropout Voltage when IOUT = 200 mA
  • Separate Pins for Enable and Tracking Inputs (HTSSOP only)
  • Low Quiescent Current (IQ):
    • < 4 µA when EN = LOW
    • 60 µA (Typical) at Light Loads
  • Extremely Wide ESR Range.
    • Stable With 10- to 500-µF Ceramic Output Capacitor, ESR 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
  • Available in the Following Packages:
    • 8-Pin SO PowerPAD Package
    • 20-Pin HTSSOP Package

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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

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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)
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)    
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)    
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)    
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