SS6431GSTR datasheet(4/11 Pages) SSC

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SS6431G

ELECTRICAL CHARACTERISTICS

(Continued)

PARAMETER

TEST CONDITIONS

SYMBOL

MIN.

TYP.

MAX.

UNIT

Reference Input Current

R1 =10k

Ω, R2=

∞,

IIN =10mA (Fig. 2)

IREF

0.8

3.5

µA

Deviation of Reference Input

Current over Temperature

R1 =10k

Ω, R2=

∞,

IIN =10mA

TA =-40

°C ~ +85°C (Fig. 2)

αI

REF

0.3

1.2

µA

Minimum Cathode current

for Regulation

VZ=VREF (Fig. 1)

IZ(MIN)

0.25

0.5

Off-State Current

VZ=20V, VREF =0V (Fig. 3)

IZ(OFF)

0.1

1.0

µA

Dynamic Output Impedance

(Note 4)

VZ=VREF

F<1kHz (Fig. 1)

0.08

0.3

Ω

VMAX

VDEV = VMAX-VMIN

VMIN

TEMPERATURE

Note 3. Deviation of reference input voltage, V

DEV, is de-

fined as the maximum variation of the reference input

voltage over the full temperature range.

The average temperature coefficient of the reference in-

put voltage,

αV

REF is defined as:

(at

ppm

REF

DEV

REF

MIN

MAX

REF

−













−













∆

Where:

T2−T1=full temperature change.

αVREF can be positive or negative depending on

whether the slope is positive or negative.

Example: VDEV= 9.0mV, VREF= 2495mV,

T2−T1= 70

°C, slope is negative.

50ppm/

2495mV

9.0mV

REF

−









Note 4. The dynamic output impedance, Rz, is de-

fined as:

RZ =

∆

When the device is programmed with two external re-

sistors, R1 and R2, (see Fig. 2), the dynamic output

impedance of the overall circuit, is defined as:

[ ]

≅

∆

2/10/2005 Rev.2.10

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