Electronic Components Datasheet Search |
|
TK653XX Datasheet(PDF) 1 Page - TOKO, Inc |
|
TK653XX Datasheet(HTML) 1 Page - TOKO, Inc |
1 / 2 page January 1999 TOKO, Inc. Page 1 TK653xx ADVANCED INFORMATION VOUT VIN LBO LBI/SB SW CONTROL CIRCUIT BATTERY MONITOR REF LBO OFF PGND GND PVIN The TK653xx mid power step-down converter is designed for portable battery powered systems, capable of operating from single Li-ion battery cells or two NiCad battery cells. The TK653xx provides the power switch, synchronous rectifier, and the control circuit for a buck step-down converter. Only three external components are required to complete the step-down conversion. The TK653xx provides laser-trimmed output voltages ranging from 1.8 V to 3.3 V. The low resistance MOSFET switch and synchronous rectifier allow average currents up to 800 mA, while maintaining peak efficiencies up to 95%. A low-battery threshold and turn-off threshold can be individually programmed by the user, utilizing a single resistor divider connected to the Low Battery Input (LBI) pin. When the resistively-divided supply voltage on the LBI pin drops below approximately 1.25 V, the Low Battery Output (LBO) pin will become asserted. The dual-function LBI pin can alternatively be used as a Standby (SB) pin. Driving the SB pin low will disable the TK653xx and drop the quiescent current on the input supply to approximately 10 µA. Pulse Burst Modulation (PBM) is used to regulate the voltage at the V OUT pin of the IC. When the output voltage of the TK653xx drops below the regulation threshold, a current pulse is transferred from the input supply to the FEATURES s Very Low Quiescent Current (10 µA) s Extremely Low Operating Current (25 µA) s Internal Battery Monitor s Regulates Down to 1.8 V s Short Circuit Protection s Synchronous Rectification s Up To 95% Efficient BLOCK DIAGRAM TK653xxM LBO VIN SW GND LBI/SB VOUT PGND PVIN ORDERING INFORMATION TAPE/REEL CODE TL: Tape Left Tape/Reel Code TK653xxM VOLTAGE CODE Voltage Code ADVANCED INFORMATION APPLICATIONS s Battery Powered System s Cellular Telephones s Pagers s Personal Communications Equipment s Radio Controlled Systems s Toys output. The TK653xx utilizes a proprietary control scheme, where the average amplitude of the current pulse is varied depending upon the current loads. The proprietary architecture allows fast transient response and minimal ripple while maintaining ease-of-use and low component count. The TK653xx is available in SOP-8 and DIP-8 packages. DESCRIPTION HIGH CURRENT STEP-UP CONVERTER WITH BATTERY MONITOR |
Similar Part No. - TK653XX |
|
Similar Description - TK653XX |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |