DEVICE INFORMATION

PIN ASSIGNMENTS

TPS61054, TPS61055

TERMINAL FUNCTIONS

TERMINAL

I/O

DESCRIPTION

NO.

NO.

NAME

(QFN)

(CSP)

AVIN

5

D3

I

This is the input voltage pin of the device. Connect directly to the input bypass capacitor.

VOUT

9

A2

O

Boost converter output.

LED

6

D2

I

LED return input. This feedback pin regulates the LED current through the internal sense

resistor by regulating the voltage across it. The regulation operates with typically 250 mV

dropout voltage. Connect to the cathode of the LED.

FLASH_SYNC

10

A1

I

Flash strobe pulse synchronization input.

FLASH_SYNC = LOW (GND): The device is operating and regulating the LED current to

the torch current level (TC).

FLASH_SYNC = HIGH (VIN): The device is operating and regulating the LED current to the

flash current level (FC).

MODE0

2

B3

I

Mode selection inputs. These pins must not be left floating and must be terminated.

MODE1

1

A3

I

MODE0 = 0, MODE1 = 0: Device in shutdown mode

MODE0 = 1, MODE1 = 0: Device in torch only mode

MODE0 = 0, MODE1 = 1: Device in torch and flash mode

MODE0 = 1, MODE1 = 1: Device in constant voltage regulation mode

Tx-TOFF

3

C3

I

RF PA synchronization input.

Tx-TOFF = LOW : The device is operating normally.

Tx-TOFF = HIGH : The device is forced into torch mode.

SW

8

B1, B2

I/O

Inductor connection. Drain of the internal power MOSFET. Connect to the switched side of

the inductor. SW is high impedance during shutdown.

PGND

7

C1, C2

Power ground. Connect to AGND underneath IC.

AGND

4

D1

Analog ground.

PowerPAD™

N/A

Internally connected to PGND.

4

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Product Folder Link(s) :TPS61054, TPS61055