Details, datasheet, quote on part number: S-8354H33MC-JWS-T2
PartS-8354H33MC-JWS-T2
CategoryPower Management and Supplies => IC Voltage Regulators => IC Switching Voltage Regulators => 7613741
Title0.3 A SWITCHING REGULATOR, 287.5 kHz SWITCHING FREQ-MAX, PDSO5
Description
CompanySeiko Instruments
DatasheetDownload S-8354H33MC-JWS-T2 datasheet
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Specifications 
Configuration / FunctionBoost
Package TypeSOT23, Other, SOT-23, 5 PIN
Life Cycle StageACTIVE
IOUT0.3000 amps
VIN3.3 volts
fsw288 kHz
Operating Temperature-40 to 85 C (-40 to 185 F)

 

Features, Applications

STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR

The S-8353/8354 Series is a CMOS step-up switching regulator which mainly consists of a reference voltage source, an oscillation circuit, a power MOS FET, an error amplifier, a phase compensation circuit, a PWM control circuit (S-8353 Series) and a PWM / PFM switching control circuit (S-8354 Series). The S-8353/8354 Series can configure the step-up switching regulator with an external coil, capacitor, and diode. In addition to the above features, the small package and low current consumption make the S-8353/8354 Series ideal for portable equipment applications requiring high efficiency. The S-8353 Series realizes low ripple, high efficiency, and excellent transient characteristics due to its PWM control circuit whose duty ratio can be varied linearly from to 83% (from to 78% for 250 kHz models), an excellently designed error amplifier, and phase compensation circuits. The S-8354 Series features a PWM / PFM switching controller that can switch the operation to a PFM controller with a duty ratio is 15% under a light load to prevent a decline in the efficiency due to the IC operating current.

Features

Low voltage operation: Startup 0.9 V min. (IOUT = 1 mA) guaranteed Low current consumption : During operation V, 50 kHz, typ.) During shutdown: 0.5 A (max.) Duty ratio : Built-in PWM / PFM switching control circuit (S-8354 Series) % (30 kHz and 50 kHz models) % (250 kHz models) External parts : Coil, capacitor, and diode Output voltage : Selectable 0.1 V steps between 1.5 and 6.5 V (for VDD / VOUT separate types) Selectable 0.1 V steps between 2.0 and 6.5 V (for other than VDD / VOUT separate types) Output voltage accuracy : 2.4% Oscillation frequency : 30 kHz, 50 kHz, and 250 kHz selectable Soft start function ms (50 kHz, typ.)

Applications

Power supplies for portable equipment such as digital cameras, electronic notebooks, and PDAs Power supplies for audio equipment such as portable / MD players Constant voltage power supplies for cameras, VCRs, and communication devices Power supplies for microcomputers

Package Name SOT-23-5 SOT-89-3 Package MP005-A UP003-A Drawing Code Tape MP005-A UP003-A Reel MP005-A UP003-A

STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.1.4_00 S-8353/8354 Series Block Diagrams

CONT Oscillation circuit PWMcontrol circuit or PWM / PFM swiching control circuit Soft start built-in reference power supply IC internal power supply + - VOUT

CONT Oscillation circuit PWMcontrol circuit or PWM / PFM swiching control circuit Soft start built-in reference power supply VOUT IC internal power supply + -

ON / OFF Figure (3) D and J Types (VDD / VOUT Separate Type)

CONT Oscillation circuit VDD IC internal power supply + PWMcontrol circuit - or PWM / PFM swiching control circuit Soft start built-in reference power supply Phase compensation circuit VSS VOUT

STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.1.4_00 S-8353/8354 Series Product Name Structure

The control system, product types, output voltage, and packages for the S-8353/8354 Series can be selected at the user's request. Please refer to the "3. Product Name" for the definition of the product name and "4. Product Name List" for the full product names. 1. Function List (1) PWM Control Products Table 1 Product Name S-8353HxxUA S-8353JxxMC Switching Frequency kHz Shutdown Function Yes - VDD / VOUT Separate Type Yes - Yes Package SOT-89-3 SOT-23-5 Application Applications requiring shutdown function Applications not requiring shutdown function Applications not requiring shutdown function For pager Applications requiring variable output voltage with an external resistor Applications requiring a shutdown function and a thin coil Applications not requiring a shutdown function and requiring a thin coil Applications not requiring a shutdown function and requiring a thin coil Applications requiring variable output voltage with an external resistor and a thin coil

(2) PWM / PFM Switching Control Products Table 2 Product Name S-8354HxxUA S-8354JxxMC Switching Frequency kHz Shutdown Function Yes - VDD / VOUT Separate Type Yes - Yes Package SOT-89-3 SOT-23-5 Application Applications requiring shutdown function Applications not requiring shutdown function Applications not requiring shutdown function For pager Applications requiring variable output voltage with an external resistor Applications requiring a shutdown function and a thin coil Applications not requiring a shutdown function and requiring a thin coil Applications not requiring a shutdown function and requiring a thin coil Applications requiring variable output voltage with an external resistor and a thin coil


 

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