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PS5005

CHIPLINK
Part Number PS5005
Manufacturer CHIPLINK
Description Step-up DC/DC Converter
Published Sep 21, 2014
Detailed Description PS5005 High Efficiency, Low Voltage Step-up DC/DC Converter GENERAL DESCRIPTION The PS5005 is a compact, high efficiency...
Datasheet PDF File PS5005 PDF File

PS5005
PS5005

Overview
PS5005 High Efficiency, Low Voltage Step-up DC/DC Converter GENERAL DESCRIPTION The PS5005 is a compact, high efficiency, and low voltage step-up DC/DC converter with an Adaptive Current Mode PWM control loop.
It comprises of an error amplifier, a ramp generator, a PWM comparator, a switch pass element and the driver.
It provides stable and high efficient operation over a wide range of load currents without external compensation.
The below 1V start-up input voltage makes PS5005 suitable for single battery cell applications.
The built-in power transistor is able to provide up to 300mA output current while working under Li-Battery Supply.
Besides, it provides extra pin to drive external power devices (NMOS or NPN ) in case higher output current is needed.
The output voltage is set with two external resistors.
The 500KHz high switching rate reduces the size of external components.
Besides, the 14µA low quiescent current together with high efficiency maintains long battery lifetime.
FEATURES ● ● ● ● ● ● ● ● Low Quiescent (Switch-off) Supply Current: 14µA Low Start-up Input Voltage: typical 0.
8V High Supply Capability: Deliver 3.
3V 100mA with 1Alkaline Cell; 5V 300mA with 1 Li-Cell Zero Shutdown Mode Supply Current High efficiency: 90% Fixed switching frequency: 500KHz Options for internal or external power switches Package type: SOT-26, SOT-89-5 APPLICATIONS MP3, PDA, Electronic Dictionary, DSC, LCD, RF-Tag, Portable Devices, Wireless Devices, etc.
PIN ASSIGNMENT 1 PS5005 PIN DESCRIPTION ORDER INFORMATION BLOCK DIAGRAM 2 PS5005 ABSOLUTE MAXIMUM RATINGS ELECTRICAL CHARACTERISTICS 3 PS5005 TYPICAL APPLICATION CIRCUITS Note:Cc for better Stability Extending Output Current Note:Cc for better Stability 4 PS5005 Note:Cc for better Stability APPLICATION DESIGN GUIDELINES 1) Output Voltage Setting Referring to Typical Application Circuit 1, the output voltage of switching regulator (Vout) is set with following equation: Vout=(1+R1/R2)*Vfb 2) Feedback Loop Des...


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