FUSB307BVMPX datasheet(6/57 Pages) ONSEMI

6 / 57 page

FUSB307B

www.onsemi.com

Dead Battery Power−up

During a dead battery condition in a mobile application,

the FUSB307B will be powered by VBUS and provide an

LDO output to power a

μController or TCPM to establish a

USB−PD contract.

The FUSB307B will enable the Sink Path when attached

to a source with any advertised current.

Systems with more than one Type−C port, the TCPM can

enable or disable the appropriate sink paths.

Once VDD is greater than VDDGOOD, the internal LDO is

bypassed and the device switches from VBUS to VDD

power.

Figure 5 demonstrates a dead battery power up sequence

for FUSB307B.

Figure 5. FUSB307B Dead Battery Operation

VDD

VBUS

FUSB307B

PWR MGMT

3.3V

LDO

LDO Bypass

SNK

Charger IC

TCPM

VDD

VIN

VBUS

FUSB307B

PWR MGMT

3.3 V

LDO

LDO Bypass

SNK

VDD

3.3 V Buck

Converter

VSYS

V3P3A

TYPE−C Port 1

TYPE−C Port 2

FPF2895

2− FUSB307B

Provides Power

to EC during

Dead Battery

5− Power to

system is

enabled

1− FUSB307B

Powers from

VBUS

and attaches as

SNK

3− Enable Sink

Path

4− TCPM

establishes PD

Contract with

SRC

Battery

30 m

VOUT

VIN

VOUT

VIN

30 m

6− FUSB307B

switches to

VDD Power and

bypasses LDO

Programmable GPIOx

The FUSB307B has two programmable GPIOs. These

can be programmed to be Inputs, CMOS Outputs or Open

Drain Outputs. To configure them, the TCPM writes to

GPIO1_CFG and GPIO2_CFG. If the GPIO is configured as

an input, its logic value can be read in GPIO_STAT and

ALERT_VD registers.

Standard Outputs

The FUSB307B implements Orientation and supports

Debug Accessory detection output as indicated in

STD_OUT_CAP register.

To configure the Orientation, Mux selection, and Debug

Accessory, the TCPM writes to STD_OUT_CFG.

FUSB307BVMPX Datasheet(PDF) 6 Page - ON Semiconductor

FUSB307BVMPX Datasheet(HTML) 6 Page - ON Semiconductor

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57

Datasheet Download

Link URL