AIM AT1613 Datasheet

AT1613

Buck Pulse-Width Modulator Controller

2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: [phone] WWW: http://www.aimtron.com.tw
Fax: [phone] Email: [e-mail]

Preview the document, detail datasheet contact to our service department.

Features

• Drives N-Channel MOSFETs

• Operates from +5V and +12V input

• Simple Single-Loop Control Design

-Voltage-Mode PWM Control

• Fast Transient Response

-High-Bandwidth Error Amplifier

-Full 0% to 100% Duty Ratio

• Excellent Output Voltage Regulation

- 1.22V Internal Reference

-± 1.5% Over Line Voltage and Temperature

• Over-Voltage and Over-Current Fault Monitors

-Does Not Require Extra Current Sensing
Element, Uses MOSFET’s r

DS(ON)

• Small Converter Size

-Constant Frequency Operation

-200kHz Free-Running Oscillator
Programmable from 50kHz to over 1MHz

• 14 Pin, SOIC Package

Applications

˙Power supply for PentiumTM, PentiumTM Pro,
PowerPC

TM

and AlphaTM Microprocessors

˙High-power 5V to 3.xV DC-DC regulators
˙Low-voltage distributed power supplies

General Description

The AT1613 provides complete control and
protection for a DC-DC converter optimized for
high-performance microprocessor applications. It is
designed to drive an N-channel MOSFET in a
standard buck topology. The AT1613 integrates all
of the control, output adjustment, monitoring and
protection functions into a single package.

The output voltage of the converter can be precisely
regulated to as low as 1.22V, with a maximum
tolerance of ± 1.5% over temperature and line

voltage variation.

The AT1613 provide simple, single feedback loop,
voltage-mode control with fast transient response. It
includes a 200kHz free-running triangle-wave
oscillator that is adjustable from below 50kHz to
over 1MHz. The error amplifier features a 12MHz
gain-bandwidth product and 6V/μs slew rate which

enables high converter bandwidth for fast transient
performance. The resulting PWM duty ratio ranges
from 0% to 100%.

The AT1613 protects against over-current
conditions by inhibiting PWM operation.The
AT1613 monitors the current by using the r

DS(on

)

of

the upper MOSFET which eliminates the need for a
current sensing resistor.

AT1613

Buck Pulse-Width Modulator Controller

2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: [phone] WWW: http://www.aimtron.com.tw
Fax: [phone] Email: [e-mail]

Preview the document, detail datasheet contact to our service department.

Block Diagram

Pin Configuration

AT1613 (14-Pin SOIC)