6.6 Power Ratings

VDD = 34V, TA = 125℃, TJ = 150℃, device soldered on the device evaluation board.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

PD

Maximum power dissipation

VDD = 34V, IQ = 140μA, no load at VOUT

4.76

mW

6.7 Safety-Related Certifications

UL

UL 1577 Component Recognition Program

Certified according to IEC 62368-1 CB

File number: E181974-20250328

Certificate number: UL-US-2562181-1

6.8 Safety Limiting Values

Safety limiting(1) intends to minimize potential damage to the isolation barrier upon failure of input or output circuitry.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

IS

Safety input, output, or supply current

RθJA = 99.5°C/W, VDD = 34V, TJ = 150°C, TA = 25°C

37

mA

PS

Safety input, output, or total power

RθJA = 99.5°C/W, TJ = 150°C, TA = 25°C

1.26

W

TS

Maximum safety temperature

150

℃

(1)

The maximum safety temperature, TS, has the same value as the maximum junction temperature, TJ, specified for the device. The

IS and PS parameters represent the safety current and safety power respectively. The maximum limits of IS and PS should not be

exceeded. These limits vary with the ambient temperature, TA.

The junction-to-air thermal resistance, RθJA, in the Thermal Information table is that of a device installed on a device evaluation board.

Use these equations to calculate the value for each parameter:

TJ = TA + RθJA × P, where P is the power dissipated in the device.

TJ(max) = TS = TA + RθJA × PS, where TJ(max) is the maximum allowed junction temperature.

PS = IS × VDDmax, where VDDmax is the maximum supply voltage.

ISOTMP35R

SNIS244A – SEPTEMBER 2025 – REVISED MAY 2026

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