TPS2145, TPS2147

TPS2155, TPS2157

SLVS333 − AUGUST 2001

9

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Terminal Functions

TERMINAL

NO.

I/O

DESCRIPTION

NAME

PWP-14

DGQ-10

I/O

DESCRIPTION

NAME

TPS2145

TPS2155

TPS2147

TPS2157

EN1

14

10

I

Logic level enable to transfer power to OUT1

EN1

14

10

I

Logic level enable to transfer power to OUT1

EN2

13

9

I

Logic level enable to transfer power to OUT2

EN2

13

9

I

Logic level enable to transfer power to OUT2

GND

8

8

6

6

Ground

LDO_ADJ

7

7

I

User feedback for adjustable regulator

LDO_EN

10

10

I

Logic level LDO enable. Active high.

LDO_OUT

4

4

4

4

O

LDO output

NC

6, 9

6, 9

No connection

OC1

12

12

8

8

O

Overcurrent status flag for OUT1. Open-drain output.

OC2

11

11

7

7

O

Overcurrent status flag for OUT2. Open-drain output.

OUT1

1

1

1

1

O

Switch 1 output

OUT2

5

5

5

5

O

Switch 2 output

SWIN2

3

3

3

3

I

Input for switch 2

VIN/SWIN1

2

2

2

2

I

Input for LDO and switch 1; device supply voltage

detailed description

VIN/SWIN1

The VIN/SWIN1 serves as the input to the internal LDO and as the input to one N-channel MOSFET. The fixed

or adjustable LDO has a dropout voltage of 0.35 V and is rated for 200 mA of continuous current. The power

switch is an N-channel MOSFET with a maximum on-state resistance of 580 m

Ω. Configured as a high-side

switch, the power switch prevents current flow from OUT to IN and IN to OUT when disabled. The power switch

is rated at 200 mA, continuous current. VIN/SWIN1 must be connected to a voltage source for device operation.

SWIN2

SWIN2 is the input to the other N-channel MOSFET, which also has a maximum on-state resistance of 580 m

Ω.

Configured as a high-side switch, the power switch prevents current flow from OUT to IN and IN to OUT when

disabled. The power switch is rated at 200 mA, continuous current.

OUTx

OUT1 and OUT2 are the outputs from the internal power-distribution switches.

LDO_OUT

LDO_OUT is the output of the internal 200-mA LDO. The fixed version of the LDO has an output of 3.3 V. The

adjustable version has an output voltage range of 1 V to 3.3 V.

LDO_ADJ

This input only applies to the adjustable LDO version of this device (TPS2145/55). LDO_ADJ is used to adjust

the output voltage anywhere between 1 V and 3.3 V.

LDO_EN

The active high input, LDO_EN, only applies to the adjustable LDO version of this device (TPS2145/55).

LDO_EN is used to enable the internal LDO and is compatible with TTL and CMOS logic.