Temperature (°C)

-50

-25

0

25

50

75

100

125

71

71.5

72

72.5

73

73.5

74

74.5

75

D004

Temperature (°C)

-40

-15

10

35

60

85

110 125

2

2.1

2.2

2.3

2.4

2.5

2.6

D013

19

REF3425-Q1, REF3430-Q1, REF3433-Q1, REF3440-Q1, REF3450-Q1

www.ti.com

SBAS901 – JULY 2018

Product Folder Links: REF3425-Q1 REF3430-Q1 REF3433-Q1 REF3440-Q1 REF3450-Q1

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Copyright © 2018, Texas Instruments Incorporated

10.2.1.2.4

Shutdown/Enable Feature

The REF34xx-Q1 references can be switched to a low power shut-down mode when a voltage of 0.5 V or lower

is input to the ENABLE pin. Likewise, the reference becomes operational for ENABLE voltages of 1.6 V or

higher. During shutdown, the supply current drops to less than 2 μA, useful in applications that are sensitive to

power consumption.

If using the shutdown feature, ensure that the ENABLE pin voltage does not fall between 0.5 V and 1.6 V

because this causes a large increase in the supply current of the device and may keep the reference from

starting up correctly. If not using the shutdown feature, however, the ENABLE pin can simply be tied to the IN

pin, and the reference remains operational continuously.

10.2.1.3 Application Curves

Figure 29. Quiescent Current vs Temperature

Figure 30. Quiescent Current Shutdown Mode