Features

• Wide VIN Range: 4.7V to 17V

• Maximum Continuous Output Current: 5A

• I2C Control Interface

• Programmable Output Voltage from 0.8V to 5.5V

• Integrated High / Low-Side FETs (65mΩ / 35mΩ)

• Advanced Adaptive On-Time Control

• Fast Transient Response

• ±0.5 Feedback Voltage Reference

• Zero Shutdown Supply Current

• 50μA Non-Switching Operating Quiescent Current

• 80μA No Load Operating Quiescent Current

• High Efficiency in Light Load and Heavy Load.

• Programmable Switching Frequency with 500kHz,

1MHz, 1.5MHz, and 2MHz options

• Internal Soft-Start

• Programmable Forced CCM, Automatic CCM/PFM

• Built-in Cycle-by-Cycle Current Limit, Short Circuit

Protection, Input UVLO, Output Under-Voltage

Protection, Output Over-Voltage Protection, and

Thermal Shutdown Protection

• Small 20-bump WLCSP (1.7mm x 2.0mm)

Applications

• CPU, GPU, AP, DSP, FPGA, VIO, VSYS

• HDD, LPDDR3, LPDDR4 Memory Power

• Tablets, Netbooks, Ultra-Books, Mobile Internet

Devices, IoT, and Server.

• DSC, Drones, Gaming Consoles, TV Set Box

Description

The KTB8371 is 5A, 17V synchronous buck regulators

with integrated high-side and low-side power FETs. The

device operates over a wide input voltage range to

support a variety of applications with input voltage from

regulated 5V and12V power rails and multicell batteries.

KTB8371 employs Kinetic’s proprietary advanced

adaptive on-time (AOT) control for fast transient

response and high output voltage accuracy. This control

technique eliminates external loop compensation

network and allows the use of ceramic output capacitors

without ripple-generating circuitry. These features

enable very small total solution size and make the

KTB8371 easy to use.

The device features an internal soft-start function to limit

inrush current during start-up. The output voltage can

be adjusted via I2C with 3μs/step ramp-up/down rate.

The device has comprehensive built-in protection

features including input voltage UVLO, high-side cycleby-

cycle peak current limit, low-side valley current limit,

reverse current protection, short-circuit protection,

output over-voltage protection, and thermal shutdown.

KTB8371 are available in RoHS and Green compliant

20-bump 1.7mm x 2.0mm x 0.6mm wafer-level chipscale

package (WLCSP20).