RS8407-AMG [PTC]

1.5MHz, 2A, Synchronous Step-Down DC/DC Converter;


型号：	RS8407-AMG
厂家：	PRINCETON TECHNOLOGY CORP
描述：	1.5MHz, 2A, Synchronous Step-Down DC/DC Converter
文件：	总4页 (文件大小：332K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

RS8407

1.5MHz, 2A, Synchronous Step-Down

DC/DC Converter

DESCRIPTION

FEATURES

The RS8407 is a high efficiency monolithic synchronous

buck regulator using a constant frequency, current mode

architecture. The device is available in an adjustable

version. Supply current with no load is 45uA and drops to

<1uA in shutdown. The 2.7V to 5.5V input voltage range

makes the RS8407 ideally suited for single Li-Ion, two to

four AA battery-powered applications. 100% duty cycle

provides low dropout operation, extending battery life in

portable systems. In power saving mode, 45uA quiescent

current is very suitable for DSP/MCU in standby

operation; and in PWM mode, low output ripple voltage is

good enough for noise sensitive applications. The two

modes can be automatically switched according to the

load current.



High Efficiency: Up to 95%

1.5MHz Constant Switching Frequency

Integrated Main switch and synchronous rectifier.

No Schottky Diode Required



Shutdown Current: <1μA

2.7V to 5.5V Input Voltage Range

Output Voltage as Low as 0.6V

100% Duty Cycle in Dropout

Quiescent Current : 45μA (TYP.)

Slope Compensated Current Mode Control for

Excellent Line and Load Transient Response

Short Circuit Protection



<1uA Shutdown Current

APPLICATIONS

Switching frequency is internally set at 1.5MHz, allowing

the use of small surface mount inductors and capacitors.

The internal synchronous switch increases efficiency and

eliminates the need for an external Schottky diode. Low

output voltages are easily supported with the 0.6V

feedback reference voltage. The RS8407 is available in a

small SOT-23-5 package and SOT-23-6 package.

 Smart Phones

 Set Top Box

 Personal Information Appliances

 Wireless and DSL Modems

 MP3 Players

 Portable Instruments

BLOCK DIAGRAM

Tel: 886-66296288‧Fax: 886-29174598‧ http://www.princeton.com.tw‧2F, No. 233-1, Baociao Rd., Sindian Dist., New Taipei City 23145, Taiwan

RS8407

APPLICATION CIRCUIT

ORDER INFORMATION

Device

Device Code

X is nominal output voltage designator :

A : ADJ

Y is package designator :

N: SOT-23-5

M: SOT-23-6

RS8407-X Y Z

Z is Lead Free designator :

P: Commercial Standard, Lead (Pb) Free and Phosphorous (P) Free Package

G: Green (Halogen Free with Commercial Standard)

V1.3

June 2014

RS8407

PIN ASSIGNMENTS

SOT-23-5

SOT-23-6

PIN DESCRIPTION

PIN No.

SOT-23-5 SOT-23-6

Pin Name

Description

Regulator Enable control input. Drive LX above 1.25V to turn on the part. Drive LX

below 0.55V to turn it off. In shutdown, all functions are disabled drawing <1μA

supply current. Do not leave LX floating.

GND

Ground.

Power Switch Output. It is the Switch node connection to Inductor. This pin

connects to the drains of the internal P-CH and N-CH MOSFET switches.

Supply Input Pin. Must be closely decoupled to GND, Pin 2, with a 2.2μF or

greater ceramic capacitor.

VIN

No connect.

Feedback Input Pin. Connect FB to the center point of the external resistor divider.

The feedback threshold voltage is 0.6V.

V1.3

June 2014

RS8407

IMPORTANT NOTICE

Princeton Technology Corporation (PTC) reserves the right to make corrections, modifications, enhancements,

improvements, and other changes to its products and to discontinue any product without notice at any time.

PTC cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a PTC product. No

circuit patent licenses are implied.

Princeton Technology Corp.

2F, 233-1, Baociao Road,

Sindian Dist., New Taipei City 23145, Taiwan

Tel: 886-2-66296288

Fax: 886-2-29174598

http://www.princeton.com.tw

V1.3

June 2014

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