P1986 Unisonic Technologies, P1986 Datasheet

P1986

Manufacturer Part Number

P1986

Description

Pwm Control 3a Step-down Converter

Manufacturer

Unisonic Technologies

Datasheet

1.P1986.pdf (6 pages)

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P1986

PWM CONTROL 3A

STEP-DOWN CONVERTER

regulator with PWM control which includes a reference voltage

source, oscillation circuit, error amplifier, internal PMOS and etc.

efficiency, and perfect transient characteristics. The duty ratio

varies linearly from 0% to 100% in the PWM control. The error

amplifier circuit and soft-start circuit included in this device can

prevent overshoot at startup. Internally, the build-in compensation

block can reduce external component count. An enable function,

an over current protect (OCP) function and short circuit protect

(SCP) are also build inside, and when OCP happens, the

operation frequency will be reduced.

when it works as an ideal power supply in SOP-8L package.

There is an internal P-channel power MOS, a coil, capacitors

inside and a diode connected externally that makes these ICs

step-down switching regulators.

* Input voltage varies from 3.6V to 20V

* Output voltage varies from 0.8V to V

* Duty ratio varies from 0% to 100% PWM control

* With 330kHz typical oscillation frequency

* Thermal shutdown and SCP function and soft-start, current limit,

* Low ESR output capacitor(Multi-layer chip capacitor) application

* Built-in switch P-channel power MOS

* Halogen Free

www.unisonic.com.tw

enable function

The UTC P1986 consists of 3A step-down switching

The UTC P1986 can provide low-ripple power, high

In application, the UTC P1986 is suitable for portable devices

DESCRIPTION

FEATURES

ORDERING INFORMATION

Ordering Number

P1986G-S08-R

UNISONIC TECHNOLOGIES CO., LTD

Package

SOP-8

LINEAR INTEGRATED CIRCUIT

Tape Reel

Packing

QW-R103-046.B

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P1986 Summary of contents

Page 1

... OCP happens, the operation frequency will be reduced. In application, the UTC P1986 is suitable for portable devices when it works as an ideal power supply in SOP-8L package. There is an internal P-channel power MOS, a coil, capacitors inside and a diode connected externally that makes these ICs step-down switching regulators ...

Page 2

... P1986 PIN CONFIGURATION PIN DESCRIPTION PIN NO. PIN NAME 1 FB Feedback pin Power-off pin normal operation (Step-down) L: Step-down operation stopped (All circuits deactivated) 3 COMP Compensation pin power supply pin Switch pin. Connect external inductor/diode here Switch pin. Connect external inductor/diode here. ...

Page 3

... P1986 BLOCK DIAGRAM EN Reference Voltage REF UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw LINEAR INTEGRATED CIRCUIT COMP Current Limit Lateh PWM SS OSC V CC Driver QW-R103-046.B ...

Page 4

... P1986 ABSOLUTE MAXIMUM RATING PARAMETER V Pin Voltage CC Feedback Pin Voltage ON/OFF Pin Voltage Switch Pin Voltage Operating Supply Voltage Power Dissipation Storage Temperature Operating Temperature Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. ...

Page 5

... P1986 TYPICAL APPLICATION CIRCUIT MLCC VCC ON/OFF R4 100K C2 C3 22µF 0.1µF C6 0.1µF option V (V) C1 (nF UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw LINEAR INTEGRATED CIRCUIT 22µ COMP B340 (μF) C7 (nF ...

Page 6

... P1986 TYPICAL CHARACTERISTICS 200 0 -200 V =19V, V =5V, I =3A CC OUT OUT Time (2μs/div) Efficiency vs. Load Current 100 =12V =19V 0.5 1.0 1.5 0 Load Current, I UTC assumes no responsibility for equipment failures that result from using products at values that ...

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