Features

• Single Input, Dual Output Low On- Resistance

Switch

 VBUS to OUT: typ. 23mΩ

 VBUS to SYS: typ. 30mΩ (Reverse Blocking)

• Wide Input Voltage Range: 2.7V – 13.5V

 VBUS Abs Max: 28V

• Surge and ESD Protected Input

 Surge Protection

■ IEC61000-4-5: > ±100V

 ESD Protection

■ IEC61000-4-2 (Level 4) VBUS

• Contact: ±8kV

• Air Gap: ±15kV

■ HBM: 2kV All Pins

• Integrated Over-voltage Protection (OVP)

 VBUS to OUT: 13.9V ±400mV

 VBUS to SYS: 5.25V ±250mV

• Maximum Continuous Current

 VBUS to OUT: 3.5A

 VBUS to SYS: 6A

• Dual Enable Control with Independent

Shutdown Control

 Active LOW VBUS to OUT

 Active HIGH VBUS to SYS

 Active HIGH Shutdown

• VBUS detection LDO

• VBUS to SYS FLAG

• Over Temperature Protection

• Pb-free 28-Bump, WLCSP 2.96mm x 1.67mm

• -40°C to 85°C Operating Temperature Range

Brief Description

The KTS1678B features two low resistance power

switches configured as single input, dual output, changeover

switch. The input to both switches is protected against

VBUS surge voltages of up to ±100V, and is also protected

against over-voltage, with preset trip points on both the

VBUS to OUT and VBUS to SYS paths, providing

protection to downstream components from abnormal input

conditions.

The main switch (VBUS to OUT) features a unidirectional

active-LOW enabled 3.5A rated MOSFET, with an OVP trip

point of 13.9V ±400mV. The secondary switch (VBUS to

SYS) is an active-HIGH enabled, reverse-blocking 6.0A

rated MOSFET, with an OVP trip point of 5.25V ±250mV.

The input to both switches is rated up to a maximum of

28V.

When VBUS is greater than 2.7V, the POK LDO provides

an “always ON” power source, regardless of the OVLO,

̅E̅̅N̅̅1̅ and EN2 state, to power downstream components

permitting operation without an installed battery.

The KTS1678B also features an active-HIGH SHUTDOWN

pin to conserve power, plus over-temperature thermal

protection.

The KTS1678B is packaged in advanced, fully “green”

compliant, 2.96mm x 1.67mm, Wafer-Level Chip-Scale

Package (WLCSP).

Applications

• Smartphones and Tablets

• Mobile Internet Devices

• Wearables

• Portable Devices