sistors and capacitors may be tied to the FEEDBACK pin a

TLH11057 – 14

FIGURE 6 Output Voltage has Negative Temperature

Coefficient (TC) if R2 has Negative TC

TLH11057 – 15

FIGURE 7 Output Voltage has Positive TC

if R1 has Negative TC

TLH11057 – 16

FIGURE 8 Diode in Series with R1 Causes Voltage

Across R1 and R2 to be Proportional to Absolute

Temperature (PTAT)

0 TC current source but a range of TCs may be synthe-

sized

TLH11057 – 17

FIGURE 9 Current Source is Programmed by R1

TLH11057 – 18

FIGURE 10 Proportional-to-Absolute-Temperature

Current Source

TLH11057 – 19

FIGURE 11 Negative-TC Current Source

Reference Hysteresis

The reference voltage depends slightly on the thermal his-

tory of the die Competitive micro-power products varyal-

ways check the data sheet for any given device Do not

assume that no specification means no hysteresis

9