P9242-R Datasheet

© 2016 Integrated Device Technology, Inc

6

December 16, 2016

2. Pin Descriptions

Table 1.

Pin Descriptions

Pins

Name

Type

Function

1

EN

Input

Active-LOW enable pin. When connected to logic HIGH, the P9242-R enters the Shut

Down Mode, which has a typical current consumption of 25µA. When connected to

logic LOW, the device is in normal operation.

2, 6, 34, 41, EP GND

–

Ground connection.

3

PREG

Output

Regulated 5V output used for internal device biasing. Connect a 1µF capacitor from

this pin to ground. This pin must not be externally loaded.

4

VIN

Input

Input power supply. Connect a 10µF capacitor from this pin to ground.

5

SW_S

Output

Step-down regulator`s switch node. Connect one of the terminals of the 4.7µH

inductor to this pin.

7

LDO33

Output

Regulated 3.3V output used for internal device biasing. Connect a 1µF capacitor

from this pin to ground. This pin should not be externally loaded.

8

VIN_LDO

Input

Linear regulator input power supply. Connected this pin to the 5V output of the step-

down regulator.

9

LDO18

Output

Regulated 1.8V output used for internal device biasing. Connect a 1µF capacitor

from this pin to ground. This pin should not be externally loaded.

10

LED1

Input

Open-drain output. Connect an LED to this pin

11

LED2

Open-drain output. Connect an LED to this pin.

12

VDDIO

Input

Input power supply for internal biasing. This pin must be connected to LDO33.

13

D-

Input

Logic I/O for USB travel adaptor detection.

14

D+

Input

Logic I/O for USB travel adaptor detection.

15

SCL

Input

16

SDA

I/O

rail.

17

ILIM

Input

Programmable over-current limit pin. Connect the center tap of the resistor divider to

this pin to set the current-limit threshold. For more information, see section 7.1.

18

LED_PAT

Input

Programmable LED pattern selection. Connect the center tap of the resistor divider to

this pin. For more information on various LED blinking patterns, see section 7.8.

19

VCOIL

Input

Input for coil voltage sensing.

20

TS

Input

Remote temperature sensor for over-temperature shutdown. Connect to the NTC

thermistor network. If not used, connect to the LDO33 pin through the 10kΩ resistor.

21

BUZR

Output

Buzzer output. Connect a buzzer to this pin.

22

OVP_CTL

I/O

Logic HIGH during power transfer phase used to scale down the voltage to detect

over-voltage for VCOIL pin.

23

Q_DRV1

I/O

Control signal for Q factor measurement circuit.

24

Q_DRV2

I/O

Control signal for Q factor measurement circuit.