SNS

FB

PG

50mV

1

2

3

4

EN

SS

1.6V

800mV

12

11

10

9

Thermal Pad

OUT

SNS

FB

PG

50mV

IN

EN

SS

NC

1.6V

1

2

3

4

5

15

14

13

12

11

Thermal Pad

TPS7A7100

SBVS189C – MARCH 2012 – REVISED MAY 2012

www.ti.com

PIN CONFIGURATIONS

RGT PACKAGE

RGW PACKAGE

3-mm × 3-mm QFN-16

5-mm × 5-mm QFN-20

(TOP VIEW)

(TOP VIEW)

PIN DESCRIPTIONS

NAME

RGW

RGT

DESCRIPTION

50mV,

100mV,

Output voltage setting pins. These pins should be connected to ground or left floating. Connecting these

200mV,

5, 6, 7,

4, 5, 6,

pins to ground increases the output voltage by the value of the pin name; multiple pins can be

400mV,

9, 10, 11

8, 9, 10 simultaneously connected to GND to select the desired output voltage. Leave these pins floating (open)

800mV,

when not in use. See the USER-CONFIGURABLE OUTPUT VOLTAGE section for more details.

1.6V

Enable pin. Driving this pin to logic high enables the device; driving the pin to logic low disables the device.

EN

14

12

See the ENABLE AND SHUTDOWN THE DEVICE section for more details.

Output voltage feedback pin. Connected to the error amplifier. See the USER-CONFIGURABLE OUTPUT

FB

3

2

VOLTAGE and TRADITIONAL ADJUSTABLE CONFIGURATION sections for more details.

GND

8, 18

7

Ground pin.

15, 16,

Unregulated supply voltage pin. It is recommended to connect an input capacitor to this pin. See INPUT

IN

13, 14

17

CAPACITOR REQUIREMENTS for more details.

Not internally connected. The NC pin is not connected to any electrical node. It is strongly recommended to

NC

12

—

connect this pin and the thermal pad to a large-area ground plane. See the Power Dissipation section for

more details.

Regulated output pin. A 4.7-

μF or larger capacitance is required for stability. See OUTPUT CAPACITOR

OUT

1, 19, 20

15, 16

REQUIREMENTS for more details.

Active-high power good pin. An open-drain output that indicates when the output voltage reaches 90% of

PG

4

3

the target. See POWER GOOD for more details.

Output voltage sense input pin. See the USER-CONFIGURABLE OUTPUT VOLTAGE and TRADITIONAL

SNS

2

1

ADJUSTABLE CONFIGURATION sections for more details.

Soft-start pin. Leaving this pin open provides soft-start of the default setting.

Connecting an external capacitor between this pin and the ground enables the soft-start function by

SS

13

11

forming an RC-delay circuit in combination with the integrated resistance on the silicon. See the SOFT-

START section for more details.

It is strongly recommended to connect the thermal pad to a large-area ground plane. If available, connect

Thermal Pad

an electrically-floating, dedicated thermal plane to the thermal pad as well.

6

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