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5

ATW28XXS Series

Notes to Specifications

ATW2812S

1

Parameter guaranteed by line and load regulation tests.

2

Bandwidth guaranteed by design. Tested for 20kHz to 2.0MHz.

3

Capacitive load may be any value from 0 to the maximum limit without compromising dc performance.

A capacitive load in excess of the maximum limit will not disturb loop stability but may interfere with the

operation of the load fault detection circuitry, appearing as a short circuit during turn-on.

4

Parameter shall be tested as part of design characterization and after design or process changes.

Thereafter, parameters shall be guaranteed to the limits specified in Table II.

5

An overload is that condition with a load in excess of the rated load but less than that necessary to trigger the short circuit

protection and is the condition of maximum power dissipation.

6

Load step transition time between 2.0

µs and 10µs.

7

Recovery time is measured from the initiation of the transient to where V

8

Input step transition time between 2.0

µs and 10µs.

9

Turn-on delay time measurement is for either a step application of power at the input or the removal of

ground signal from the inhibit pin (pin 2) while power is applied to the input.

Test

Symbol

Conditions

-55°C

unless otherwise specified

Group A

Subgroups

Device

Types

Limits

Unit

Min

Max

Recovery time step

transient load changes

6, 7

1250mA to/from 2500mA

4

All

100

µs

5,6

200

0mA to 1250mA

4

All

5.0

ms

5,6

10

Output response to

Input step 18V to/ from

4,5,6

All

-1000

+1000

mVpk

Transient step

40V dc,

Line changes

4, 8

Recovery time

Input step 18V to/ from

4,5,6

All

500

µs

Transient step

40V dc

Line changes

4, 7, 8

Turn on overshoot

4,5,6

All

600

mVpk

Turn on delay

9

4,5,6

All

12

ms

Load fault recovery

4, 9

4,5,6

All

12

ms