TPS7B7701-Q1 Automotive single-channel antenna LDO linear regulator with current sense |

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Automotive single-channel antenna LDO linear regulator with current sense


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The TPS7B770x-Q1 family of devices feature a single and dual, high-voltage low-dropout regulator (LDO) with current sensing, designed to operate with a wide input-voltage range from 4.5 V to 40 V (45-V load dump protection). These devices provide power to the low-noise amplifiers of the active antenna through a coax cable with 300 mA per channel current. Each channel also provides an adjustable output voltage from 1.5 V to 20 V.

These devices provide diagnostics through the current sense and error pins. To monitor the load current, a high-side current-sense circuitry provides a proportional analog output to the sensed load current. The accurate current sense allows detection of open, normal, and short-circuit conditions without the need for further calibration. Current sense can be multiplexed between channels and devices to save analog-to-digital converter (ADC) resources. Each channel also implements adjustable current limit with an external resistor.

An integrated reverse polarity diode eliminates the need for an external diode. These devices feature standard thermal shutdown, short-to-battery protection on the output, and reverse current protection. Each channel has internal inductive clamp protection on the output during inductive switch off.

These devices operate over a –40°C to +125°C ambient temperature range.


  • 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 2
    • Device CDM ESD Classification C4B
  • Single and Dual-Channel LDO With Current Sense and Adjustable Current-Limit
  • 4.5-V to 40-V Wide Input Voltage Range, 45-V Load Dump
  • Power Switch Mode When Tying FB to GND
  • 1.5-V to 20-V Adjustable Output Voltage
  • Up to 300-mA Output Current per Channel
  • Adjustable Current-Limit With External Resistor
  • High Accuracy Current-Sense to Detect Antenna Open Condition at Low Current Without Further Calibration
  • High Power-Supply Rejection Ratio: Typical 73 dB at 100 Hz
  • Integrated Reverse-Polarity Protection, Down to –40 V and No Need for External Diode
  • 500-mV Max Dropout Voltage at 100-mA Load
  • Stable With Output Capacitor in 2.2-µF to 100-µF Range (ESR 1 mΩ to 5 Ω)
  • Integrated Protection and Diagnostics
    • Thermal Shutdown
    • Undervoltage Lockout (UVLO)
    • Short-Circuit Protection
    • Reverse Battery Polarity Protection
    • Reverse-Current Protection
    • Output Short-to-Battery Protection
    • Output Inductive Load Clamp
    • Multiplexing Current Sense Between Channels and Devices
    • Ability to Distinguish All Faults With Current Sense
  • 16-Pin HTSSOP PowerPAD™ Package

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Thermal calculator

Estimate the LDO IC temperature at your design conditions:
Part number
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.


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) TI functional safety category Approx. price (US$) Rating PSRR @ 100 KHz (dB) Accuracy (%) Dropout voltage (Vdo) (Typ) (mV) Iq (Typ) (mA) Package size: mm2:W x L (PKG)
TPS7B7701-Q1 Order now Adjustable Output     0.3     40     4     20     1.5     HTSSOP | 16     Adjustable Current Limit
Current Sense
Power Good
Reverse Current Protection
Reverse Voltage Protection    
1     -40 to 125     40     Functional safety-capable     0.88 | 1ku     Automotive     60     2     350     0.6     16HTSSOP: 32 mm2: 6.4 x 5 (HTSSOP | 16)    
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     Functional safety-capable     0.35 | 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    
Reverse Current Protection
Reverse Voltage Protection    
1     -40 to 125     45     Functional safety-capable     0.75 | 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)    
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