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UP6161

Single 12V Input Supply Dual Regulator Synchronous Buck PWM and Linear Regulator Controller

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Preliminary

uP6161

Single 12V Input Supply Dual Regulator -

Synchronous-Buck-PWM and Linear-Regulator Controller

General Description

Features

The uP6161 integrates a high performance synchronous-

rectified buck controller and a linear-regulator controller.

This part works with a single +12V supply voltage and

delivers two high quality output voltages for both processing

unit and memory unit. An internal linear regulator provides

optimum 9V drive voltage for efficiency and thermal

management.

The buck controller features internal MOSFET drivers that

supports bootstrapped voltage for high efficiency power

conversion. The bootstrap diode is built-in to simplify the

circuit design and minimize external part count. It

incorporates simple, single feedback loop, voltage-control

with fast transient response.

The linear controller drives an external N-Channel MOSFET

with under voltage protection during both soft start and

normal operation.

Other features include adjustable operation frequency,

internal soft start, under voltage protection, adjustable over

current protection and shutdown function. With the above

function, this part provides customers a compact, well

protected and cost-effective solution. This part is available

in SOP-14 and QFN3x3 -16L packages.

Applications

† Power Supplies for Microprocessors or

Subsystem Power Supplies

† Cable Modems, Set Top Boxes, and DSL

Modems

† Industrial Power Supplies; General Purpose

Supplies

† 12V Input DC-DC Regulators

† Low-Voltage Distributed Power Supplies

† Operate with Single 12V Supply

† Self-Regulated 9V Drive Voltage

† Integrated Boot Diode

† Provide Two Regulated Voltages

† One Synchronous-Rectified Buck Controller

† One Linear Controller

† Both Controllers Drive N-Channel MOSFETs

† Smaller Converter Size

† Excellent Output Voltage Regulation

† 1.5% for Buck Controller

† 2% for Linear Controller

† Simple Single-Loop Control Design

† Voltage-Mode PWM Control

† Fast Transient Response

† High-Bandwidth Error Amplifier

† Lossless, Programmable Overcurrent Protection

† Uses Lower MOSFET R

DS(ON)

† Adjustable Frequency from 150kHz to 1MHz

† Internal Soft Start for Both Outputs

† Under Voltage Protection for Both Outputs

including Soft Start Cycle

† SOP-14 and QFN3x3-16 packages

† RoHS Compliant and 100% Lead Free

Ordering Information

Order Number Package Type

Remark

uP6161S14 SOP - 14

uP6161Q

QFN3x3 - 16

Note: uPI products are compatible with the current IPC/

JEDEC J-STD-020 and RoHS requirements. They are 100%

matte tin (Sn) plating and suitable for use in SnPb or Pb-

free soldering processes.

uPI Semiconductor Corp., http://www.upi-semi.com

1

Rev. P00, File Name: uP6161-DS-P0001

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