TPS7B70-Q1 Automotive 300-mA 40-V low-IQ LDO linear regulator with power good |


Automotive 300-mA 40-V low-IQ LDO linear regulator with power good


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The TPS7B70-Q1 is a 300-mA, low-dropout linear regulator (LDO) that operates from an automotive battery. The device has only 19 µA of quiescent current at light loads. Thus, the TPS7B70-Q1 is an excellent selection to supply power to always-on components, such as microcontrollers (MCUs) and controller area network (CAN) transceivers.

The input voltage range of the TPS7B70-Q1 extends thru 40 V. This voltage helps the device withstand transient conditions, such as load-dump. The device also has a power good (PG) pin to tell the system when the output voltage is in regulation. To achieve the necessary operation, you can adjust the PG threshold voltage and delay. The threshold voltage of the PG signal is adjusted through external resistors. Adjust the delay with an external capacitor.

This device operates in ambient temperatures from –40°C to +125°C, and with junction temperatures from –40°C to +150°C. This device also has a thermally conductive package that enables sustained operation despite significant dissipation across the device, a typical property of off-battery operation. These features, along with included current limit and thermal shutdown protection, make the TPS7B70-Q1 an excellent selection to supply power to automotive system components.


  • 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 2
    • Device CDM ESD Classification Level C4B
  • Device Junction Temperature Range:
    –40°C to +150°C
  • Maximum Output Current: 300 mA
  • 4-V to 40-V Wide VIN Input-Voltage Range With up to 45-V Transients
  • Fixed 3.3-V and 5-V Outputs
  • Maximum Dropout Voltage: 400 mV at 300 mA
  • Stable With Output Capacitor in Wide Range of Capacitance (4.7 µF to 500 µF) and ESR (0.001 Ω to 20 Ω)
  • Low Quiescent Current (I(Q))
    • < 4 µA When EN is Low (Shutdown Mode)
    • 19 µA Typical at Light Loads With VINT High
  • Fully Adjustable Power-Good Threshold and Power-Good Delay Timing
  • Low Input-Voltage Tracking to UVLO
  • Integrated Fault Protection
    • Overload Current-Limit Protection
    • Thermal Shutdown
  • 16-Pin HTSSOP PowerPAD™ Package
    • Thermal Resistance (RθJA): 39.7°C/W

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Part number Order Output options Iout (Max) (A) Vin (Max) (V) Vin (Min) (V) Vout (Max) (V) Vout (Min) (V) Fixed output options (V) Package Group Features Regulated outputs (#) Operating temperature range (C) Thermal resistance θJA (°C/W) Approx. price (US$) Rating Output capacitor type PSRR @ 100 KHz (dB) Accuracy (%) Vdo (Typ) (mV) Iq (Typ) (mA) Package size: mm2:W x L (PKG)
TPS7B70-Q1 Order now Fixed Output     0.3     40     4     5     3.3     5
HTSSOP | 16     Enable
Power Good    
1     -40 to 125     39.7     0.70 | 1ku     Automotive     Ceramic
40     2     300     0.019     16HTSSOP: 32 mm2: 6.4 x 5 (HTSSOP | 16)    
TPS7A66-Q1 Order now Adjustable Output
Fixed Output    
0.15     40     4     5.5     1.5     3.3
MSOP-PowerPAD | 8     Enable
Power Good    
1     -40 to 125     63     0.60 | 1ku     Automotive     Non-Ceramic     40     2     300     0.012     8MSOP-PowerPAD: 15 mm2: 4.9 x 3 (MSOP-PowerPAD | 8)