7.3 Recommended Operating Conditions

over operating free-air temperature range (unless otherwise noted)

Parameter

Pin

MIN

MAX

UNIT

Input Voltage Range

IN

2.7

5.7 (1)

V

Output Voltage Range

OUT

V

Enable Pin Voltage Range

EN/UVLO

5 (2)

V

dVdT Capacitor Voltage Rating

dVdt

V

PGTH Pin Voltage Range

PGTH

5 (3)

V

PG Pin Voltage Range

PG

5 (3)

V

ITIMER Pin Capacitor Voltage Rating

ITIMER

4

V

ILM Pin Resistance

ILM

750

6650

Ω

IN to OUT

4

A

Junction temperature

–40

125

°C

(1)

The input operating voltage should be limited to the selected Output Voltage Clamp threshold as listed in the Electrical Characteristics

section

(2)

For supply voltages below 5V, it is okay to pull up the EN pin to IN directly. For supply voltages greater than 5V or systems which can

be exposed to reverse polarity on input supply, it is recommended to use a pull-up resistor with a minimum value of 350 kΩ.

(3)

For systems which can be exposed to reverse polarity on input supply, if this pin is referred to input supply, it is recommended to use a

pull-up resistor with a minimum value of 350 kΩ to limit the current through the pin.

7.4 Thermal Information

THERMAL METRIC (1)

TPS2521xx

UNIT

RPW (QFN)

10 PINS

Junction-to-ambient thermal resistance

41.7 (2)

°C/W

74.5 (3)

°C/W

Junction-to-top characterization parameter

1

°C/W

Junction-to-board characterization parameter

20 (2)

°C/W

27.6 (3)

°C/W

(1)

For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application

report.

(2)

Based on simulations conducted with the device mounted on a custom 4-layer PCB (2s2p) with 8 thermal vias under device

(3)

Based on simulations conducted with the device mounted on a JEDEC 4-layer PCB (2s2p) with no thermal vias under device

TPS2521

SLVSFX8 – MARCH 2021

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