Pin Descriptions

Pin Configuration

TSOPJW-12

TDFN34-16

(Top View)

(Top View)

Pin #

TSOPJW-12

TDFN34-16

Symbol

Function

1

15, 16

VP

Input power pin; connected to the source of the P-channel MOSFET.

Connect to the input capacitor(s).

2

14

EN/SET

IC active high enable pin. Alternately, input pin for S

lizing FB2 reference.

3

13

SEL

Logic high selects FB1 high output reference; logic low selects FB2 low

output reference. Pull low for S

4

12

VIN

Input voltage for the converter. Connect this pin directly to the VP pin.

5

11

N/C

No connection.

6, 7

9, 10

SW

Boost converter switching node. Connect the power inductor between

this pin and LIN pin.

8

6, 7, 8

PGND

Power ground for the boost converter; connected to the source of the

N-channel MOSFET. Connect to the input and output capacitor return.

9

5

GND

Ground pin.

10

4

FB2

Feedback pin for low output voltage set point. Pin set to 0.6V when

SEL is low and disabled when SEL is high. Voltage is set from 0.6V to

1.2V with S

11

3

FB1

Feedback pin for high output voltage set point. Pin set to 1.2V when

SEL is high and disabled when SEL is low. Disabled with S

control.

12

1, 2

LIN

Switched power input. Connected to the power inductor.

N/A

EP

Exposed paddle (bottom). Tied to SW pins. May be connected to SW

pins or left floating.

FB1

FB2

GND

LIN

LIN

3

PGND

PGND

PGND

EN/SET

SEL

VIN

VP

VP

N/C

SW

SW

4

5

1

2

6

7

8

14

13

12

16

15

11

10

9

1

2

3

4

5

6

12

11

10

9

8

7

VP

EN/SET

SEL

VIN

N/C

SW

LIN

FB1

FB2

GND

PGND

SW

AAT1230/1230-1

18V 100mA Step-Up Converter

2

1230.2007.06.1.6