Features

• Wide Input Voltage Range: 2.5V to 5.5V

• Output Voltage 5.4V

• IOUT up to 1.0 A at VOUT = 5.4 V, VIN ≥ 3.0 V

• 3MHz PWM Switching Frequency

• High Efficiency and Low Quiescent Current

 Over 95 Efficiency

 35μA Quiescent Current in Bypass Mode

 55μA Quiescent Current in PFM Operation

• ±2 DC Voltage Accuracy in PWM mode

• Undervoltage Lockout (UVLO)

• Short Circuit Protection

• Hiccup Current Limit

• Over Temperature Protection

• Output Capacitor Pre-Charge and Soft-Start

• Pb-free 9-Bump, WLCSP 1.38mm x 1.38mm

• RoHS and Green Compliant

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

Applications

• Smartphones and Tablets

• Mobile Internet Devices

• USB OTG

• Wearables

• NFC Applications

• Portable Devices

Brief Description

The KTC2110A features a high-efficiency, micropower

synchronous boost for Lithium-Ion/Polymer battery

applications.

The KTC2110A achieves high efficiency over a wide output

current range by operating in auto PWM/PFM control. The

control method is automatically selected according to the

output load conditions.

The KTC2110A also features Bypass Mode which allows

passing input power directly to output with over current

protection when EN pin is pulled LOW.

The constant on-time design does not require any external

compensation components, simplifying the design and also

provides ultra-fast transient response.

Inrush current-limiting feature is provided to reduce inrush

current, which minimizes the voltage droop on the battery

when the device is turned on.

The KTC2110A is packaged in advanced, RoHS and

Green compliant, 1.38mm x 1.38mm, 9-balls Wafer-Level

Chip-Scale Package (WLCSP).