4 Family Devices

PART NUMBER

CURRENT (A)

OUTPUT VOLTAGE (V)

MODE

TPSM861253

0 to 1

3.3

FCCM

TPSM863252

0 to 3

0.6 to 10

ECO

TPSM863253

0 to 3

3.3

FCCM

TPSM863257

0 to 3

0.6 to 6

FCCM

5 Pin Configuration and Functions

VIN

SW

PGND

VOUT

EN

VOS

1

2

3

4

5

6

7

PG

Figure 5-1. TPSM861253 RDX Package, 7-Pin QFN-FCMOD (Top View)

Table 5-1. Pin Functions

Pin

Type(1)

Description

Name

NO.

VIN

1

P

Input voltage supply pin. Connect the input decoupling capacitors between VIN and GND.

SW

2

NC

Switch pin of the power stage. Do not connect, leave floating.

VOUT

3

P

Output connection. Connect recommended output capacitance from VOUT to PGND.

PGND

4

G

Power ground connection

PG

5

A

Power-good open drain output. PG pin can be floating.

EN

6

A

Enable pin of buck converter. Drive EN high to turn on the converter; drive EN low to turn off

the converter. Internal pulldown to GND by a resistance.

VOS

7

A

Converter feedback input for TPSM861253. Connect to output voltage directly.

(1)

A = Analog, P = Power, G = Ground

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TPSM861253

SLUSFD2A – SEPTEMBER 2023 – REVISED JANUARY 2024

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Product Folder Links: TPSM861253