15

16

Exposed

Thermal Pad*

1

2

SW

SW

3

4

FREQ

PG

13

14

6

5

7

8

12

11

10

9

PVIN

AVIN

SS

PVIN

TPS62090, TPS62091

TPS62092, TPS62093

SLVSAW2A – MARCH 2012 – REVISED MARCH 2012

www.ti.com

DEVICE INFORMATION

16 PIN 3x3mm QFN

TOP VIEW

NOTE: *The exposed Thermal Pad is connected to AGND.

PIN FUNCTIONS

PIN

I/O

DESCRIPTION

NAME

NO.

SW

1, 2

I

Switch pin of the power stage.

This pin selects the switching frequency of the device. FREQ=low sets the typical switching frequency to 2.8

FREQ

3

I

MHz. FREQ=high sets the typical switching frequency to 1.4 MHz. This pin has an active pull down resistor of

typically 400 k

Ω and can be left floating for 2.8 MHz operation.

Power good open drain output. This pin is high impedance if the output voltage is within regulation. This pin is

PG

4

O

pulled low if the output is below its nominal value. The pull up resistor can not be connected to any voltage

higher than the input voltage of the device.

Feedback pin of the device. For the fixed output voltage versions this pin needs to be connected to GND for

FB

5

improved thermal performance. If, desired then this pin can also be left floating since it is internally connected

with 400 k

Ω to GND for fixed output voltage versions.

AGND

6

Analog ground.

CP

7

Internal charge pump flying capacitor. Connect a 10 nF capacitor between CP and CN.

CN

8

Internal charge pump flying capacitor. Connect a 10 nF capacitor between CP and CN.

Soft-start control pin. A capacitor is connected to this pin and sets the softstart time. Leaving this pin floating

SS

9

I

sets the minimum start-up time.

AVIN

10

Bias supply input voltage pin.

PVIN

11,12

Power supply input voltage pin.

Device enable. To enable the device this pin needs to be pulled high. Pulling this pin low disables the device.

EN

13

This pin has an active pull down resistor of typically 400 k

Ω.

PGND

14,15

Power ground connection.

VOS

16

Output voltage sense pin. This pin needs to be connected to the output voltage.

Thermal Pad

The exposed thermal pad is connected to AGND.

4

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Product Folder Link(s): TPS62090 TPS62091 TPS62092 TPS62093