Details, datasheet, quote on part number: S-8351AxxMC
PartS-8351AxxMC
CategoryPower Management => Regulators => Switching Regulators
DescriptionControl Method = PFM ;; Operation Start Voltage = 0.9 V ;; Output Voltage = 2.0-6.5V (A, B, C) 1.5-6V (D) ;; Output Accuracy = ±2.4% ;; Switching Frequency = 100 KHZ ;; Current Consumption Operating = 23.2 µA (3.3V) ;; Current Consumption Shutdown = 0.5 µA Max. ;; Efficiency Typ. = 85% ;; Package = SOT-23-5 SOT-23-3 SOT-89-3
CompanySeiko Instruments
DatasheetDownload S-8351AxxMC datasheet
  

 

Features, Applications

SMALL PACKAGE PFM CONTROL STEP-UP SWITCHING REGULATOR

The S-8351/8352 Series is a CMOS PFM-control step-up switching regulator that mainly consists of a reference voltage source, an oscillator, and a comparator. The PFM controller allows the duty ratio to be automatically switched according to the load (light load: 50%, high output current: 75%), enabling products with a low ripple over a wide range, high efficiency, and high output current (product types A, B, and D). Products with a fixed duty ratio of 75% are also available (product type C). With the S-8351 Series, a step-up switching regulator can be configured by using an external coil, capacitor, and diode. The built-in MOS FET is turned off by a protection circuit when the voltage at the CONT pin exceeds the limit to prevent it from being damaged. This feature, along with the mini package and low current consumption, makes the S-8351 Series ideal for applications such as the power supply unit of portable equipment. The S-8352 Series, which features an external transistor, is suitable for applications requiring a high output current.

Features

Startup 0.9 V min. (IOUT = 1 mA) guaranteed During maximum operation: 23.2 A (VOUT 3.3 V, typ.) During shutdown: 0.5 A (max.) Duty ratio: 50/75%, built-in auto-switching-type PFM controller (product types D) 75%, built-in fixed-type PFM controller (product type C) External parts: Coil, capacitor, diode Output voltage: Settable to between 6.5 V (product types 6.5 V (product type 0.1 V steps, accuracy of 2.4% Shutdown function (product type A) VDD/VOUT separate type (product type D) External transistor type available (S-8352 Series) Low voltage operation: Low input current:

SOT-23-3 (package drawing code: MP003-A) SOT-23-5 (package drawing code: MP005-A) SOT-89-3 (package drawing code: UP003-A)

Applications

Power supply for portable equipment such as digital cameras, electronic notebooks, and PDAs Power supply for audio equipment such as portable CD/MD players Constant voltage power supply for cameras, video equipment, and communications equipment Power supply for microcomputers

Control System Switching Product Name (Duty Ratio Frequency (kHz) S-8352CxxUA S-8352DxxMC PFM (50/75) PFM (50/75) PFM (75) PFM (75) PFM (50/75) PFM (50/75) PFM (50/75) PFM (75) PFM (75) PFM Shutdown Function Yes VDD/VOUT Separate Type Yes Power MOS FET Built-in External Package SOT-89-3 SOT-23-5

Application requiring shutdown function Application not requiring shutdown function Application not requiring shutdown function Application not requiring shutdown function Application in which output voltage is adjusted by external resistance Application requiring shutdown function Application not requiring shutdown function Application not requiring shutdown function Application not requiring shutdown function Application in which output voltage is adjusted by external resistance

2. Product Name XX - XXX T2 IC direction in tape specification Product name Package name MA; SOT-23-3 (without shutdown function) MC; SOT-23-5 (with shutdown function or VDD /VOUT separate type) UA; SOT-89-3 (without shutdown function) Output voltage 10 (15 for output voltage value 1.5) Product type A ; With shutdown function B ; Automatic duty ratio switching type C ; Duty ratio fixed type D ; VDD /VOUT separate type Series name 1; Built-in power MOS FET 2; External power MOS FET

3. Product Name List Output Voltage S-8351AxxMC Series

Please consult our sales staff if you require a product with an output voltage other than those specified


 

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