IP431A Series

Prelim. 2/95

BLOCK DIAGRAM

DESCRIPTION

The IP431A circuit is a monolithic three terminal

programmable shunt regulator diode. The voltage

reference operates as a low temperature coefficient zener

using two external resistors. The device has a wide

operating current range of 1 mA to 100mA and a typical

dynamic impedance of 0.2

Ω. Active output circuitry

provides a very sharp turn-on characteristic making these

devices excellent replacements for zener diodes in many

applications. Being a shunt regulator it can be used as

either a positive or negative voltage reference.

CATHODE

ANODE

REF

Cathode To Anode Voltage

Cathode Current Range

1.0 to 100mA

RECOMMENDED OPERATING CONDITIONS

* This test is not applicable to surface mount (D Package) devices.

IP431AM

Parameter

Test Conditions

Min.

Typ.

Max.

Units

R1 = 10k

Ω

R2 =

∞

R1 = 10k

Ω

R2 =

∞

f

≤ 1kHz

∆I

∆V

∆V

∆V

REF

∆V

REF

∆V

KA

∆I

REF

Reference Input Voltage

(Figure 1)

Reference Input Voltage Over

(Figure 1)

Ratio of Reference Voltage Change to

Change in Cathode to Anode Voltage

(Figure 2)

Reference Input Current

(Figure 2)

Reference Input Current Deviation Over

Temperature Range

(Figure 2)

Minimum Cathode Current

For Regulation

(Figure 1)

Off–State Cathode Current

(Figure 3)

(Figure 1)

V

mV

mV/V

µA

µA

mA

nA

Ω

2.47

2.495

2.52

2.426

2.564

15

44

14

7

13

0.5

1

3

1000

0.2

0.5

-1.5

-2.7

-0.7

-2