(ACTIVE) Single Output LDO, 400mA, Adj.(1.2 to 5.5V), Cap free, Low Noise, Reverse Current Protection


Functional diagram


The TPS736xx family of low-dropout (LDO) linear voltage regulators uses a new topology: an NMOS pass element in a voltage-follower configuration. This topology is stable using output capacitors with low ESR, and even allows operation without a capacitor. It also provides high reverse blockage (low reverse current) and ground pin current that is nearly constant over all values of output current.

The TPS736xx uses an advanced BiCMOS process to yield high precision while delivering very low dropout voltages and low ground pin current. Current consumption, when not enabled, is under 1 µA and ideal for portable applications. The extremely low output noise (30 µVRMS with 0.1-µF CNR) is ideal for powering VCOs. These devices are protected by thermal shutdown and foldback current limit.


  • Stable with No Output Capacitor or Any Value
    or Type of Capacitor
  • Input Voltage Range of 1.7 V to 5.5 V
  • Ultra-Low Dropout Voltage: 75 mV typ
  • Excellent Load Transient Response–with or
    without Optional Output Capacitor
  • New NMOS Topology Delivers Low Reverse Leakage
  • Low Noise: 30 µVRMS typ
    (10 Hz to 100 kHz)
  • 0.5% Initial Accuracy
  • 1% Overall Accuracy Over Line, Load, and
  • Less Than 1 µA max IQ in Shutdown
  • Thermal Shutdown and Specified Min/Max Current
    Limit Protection
  • Available in Multiple Output Voltage Versions
    • Fixed Outputs of 1.20 V to 5.0 V
    • Adjustable Output from 1.20 V to 5.5 V
    • Custom Outputs Available
    • Portable/Battery-Powered Equipment
    • Post-Regulation for Switching Supplies
    • Noise-Sensitive Circuitry such as VCOs
    • Point of Load Regulation for DSPs, FPGAs,
      ASICs, and Microprocessors

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Iout (Max) (A) 0.4    
Output Options Adjustable Output^Fixed Output    
Vin (Min) (V) 1.7    
Vin (Max) (V) 5.5    
Fixed Output Options (V) 1.25^1.5^1.6^1.8^1.9^2.5^3^3.2^3.3^4.3    
Vout (Min) (V) 1.2    
Vout (Max) (V) 5.4    
Iq (Typ) (mA) 0.4    
Vdo (Typ) (mV) 75    
Accuracy (%) 1    
Noise (uVrms) 30    
PSRR @ 100KHz (dB) 32    
Output Capacitor Type Cap Free^Ceramic    
Additional Features Enable^Fast Transient Response^Foldback Overcurrent Protection^Reverse Current Protection^Soft Start^Thermal Shutdown    
Rating Catalog    
Operating Temperature Range (C) -40 to 125    
Pin/Package 5SOT-23^6SOT-223^8SON    
Approx. Price (US$) 0.75 | 1ku    

Companion Products

Technical Documents

Datasheet (1)

Application notes (10)

User guides (3)

Solution guides (1)

Design files (3)

Radiation & Reliability reports (3)

More literature (1)

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