Datasheet > RT8108F

RT8108F

更新时间： 2024-01-27 08:38:54

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立锜 - RICHTEK		/
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数据手册

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RT8108F 技术参数

Status：	Active	Vs (typ) (V)：	12
Vin (min) (V)：	3.3	Vin (max) (V)：	12
Vout (min) (V)：	0.6	Vout (max) (V)：	5
Preset Vout (V)：		Output Adj. Method：	Resistor
Accuracy (+/- %)：	1	Freq (typ) (kHz)：	500.0
Freq (min) (kHz)：		Freq (max) (kHz)：
Iq (typ) (mA)：	2.5	Features：	Built-in Bootstrap Switch;Force PWM;OCP;OVP;SCP;UVP;Voltage Mode Control
Package Type：	PSOP-8;SOP-8

RT8108F 数据手册

RT8108

5V to 12V Single Synchronous Buck PWM Controller

General Description

Features

^zSingle IC Supply Voltage ( 5V to 12V)

The RT8108 series are single-phase synchronous buck

PWM DC/DC controllers designed to drive two

N-MOSFETs. They provide a highly accurate,

programmable output voltage precisely regulated to low

voltage requirement with an internal 0.6V or 0.8V reference.

^zDrive Two N-MOSFETs

^zFixed Operating Frequency at 200kHz, 300kHz and

500kHz

^zVoltage Mode PWM Control with External

Feedback Loop Compensation

The RT8108 series use a single feedback loop voltage mode

PWM control for fast transient response. The high driving

capability makes it suitable for large output current

applications. An oscillator with fixed frequency 200kHz /

300kHz / 500kHz reduces the component size of the

external inductor and capacitor for saving PCB board area

and cost.

^zOver Current Protection by Sensing MOSFET R_DS(ON)

^zHardware Pin for On/Off Control

^zFull 0 to 90% Duty Cycle

^zFast Transient Response

^zRoHS Compliant and Halogen Free

Applications

z Mother Boards andDesktop Servers

The RT8108 series integrate complete protection functions

such as OCP, OVP and OTP UVP into SOP-8 and SOP-8

(Exposed Pad) surface mount packages.

z Graphic Cards

z Switching Power Supply

z GenericDC/DC Power Regulator

Ordering Information

RT8108

Pin Configurations

Package Type

S : SOP-8

(TOP VIEW)

SP : SOP-8 (Exposed Pad-Option 1)

BOOT

UGATE

PHASE

COMP/SD

Lead Plating System

G : Green (Halogen Free and Pb Free)

GND

LGATE/OCSET

VCC

Frequency / V_REFOptions

A : 300k / 0.6V

SOP-8

B : 300k / 0.8V

C : 200k / 0.6V

D : 200k / 0.8V

E : 500k / 0.6V

BOOT

UGATE

PHASE

COMP/SD

GND

F : 500k / 0.8V

GND

LGATE/OCSET

Note :

VCC

Richtek products are :

SOP-8 (Exposed Pad)

` RoHS compliant and compatible with the current require-

ments of IPC/JEDEC J-STD-020.

` Suitable for use in SnPb or Pb-free soldering processes.

DS8108-03 September 2011

www.richtek.com

12 3 4 5 6 7...15

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