UA723 150-mA, 40-V, adjustable linear voltage regulator |

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150-mA, 40-V, adjustable linear voltage regulator

150-mA, 40-V, adjustable linear voltage regulator - UA723

Recommended alternative parts

  • TPS7A49  -  TPS7A49 is a newer higher performance 30V, 150mA LDO


The uA723 is a precision integrated-circuit voltage regulator, featuring high ripple rejection, excellent input and load regulation, excellent temperature stability, and low standby current. The circuit consists of a temperature-compensated reference-voltage amplifier, an error amplifier, a 150-mA output transistor, and an adjustable-output current limiter.

The uA723 is designed for use in positive or negative power supplies as a series, shunt, switching, or floating regulator. For output currents exceeding 150 mA, additional pass elements can be connected as shown in Figures 4 and 5.

The uA723C is characterized for operation from 0°C to 70°C.


  • 150-mA Load Current Without External Power Transistor
  • Adjustable Current-Limiting Capability
  • Input Voltages up to 40 V
  • Output Adjustable From 2 V to 37 V
  • Direct Replacement for Fairchild uA723C


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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) Noise (uVrms) Approx. price (US$) Rating Accuracy (%) Dropout voltage (Vdo) (Typ) (mV) Iq (Typ) (mA) Package size: mm2:W x L (PKG)
UA723 Order now Adjustable output     0.15     40     9.5     37     2     PDIP | 14
SOIC | 14
SO | 14    
    1     0 to 70     86     20     0.22 | 1ku     Catalog     4.9     3000     2.3     14PDIP: 181 mm2: 9.4 x 19.3 (PDIP | 14)
14SO: 80 mm2: 7.8 x 10.2 (SO | 14)
14SOIC: 52 mm2: 6 x 8.65 (SOIC | 14)