 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
RT9941 Datasheet(PDF) 1 Page - Richtek Technology Corporation |
|
|
|||||||||||||||||||||||||||||
RT9941 Datasheet(HTML) 1 Page - Richtek Technology Corporation |
|
|
1 / 33 page  RT9941 1 DS9941-01 April 2011 www.richtek.com Ordering Information Note : Richtek products are : RoHS compliant and compatible with the current require- ments of IPC/JEDEC J-STD-020. Suitable for use in SnPb or Pb-free soldering processes. Power Management ICs for Handheld Device Applications GPS and PDA HandheldDevices General Description The RT9941 is a complete power management IC (PMIC) for handheld device platform. This PMIC contains a fully integrated linear charger for a single cell Lithium Ion battery, five LDO linear regulators and two high efficiency buck converters, a comparator, a reset and an I2C serial interface to program one buck and one regulator output voltages as well as power on timing control for complete flexibility. The linear charger integrates LDO, MOSFET pass element and thermal-regulation circuitry. The proprietary thermal- regulation circuitry limits the die temperature when fast charging or while exposed to high ambient temperatures, allowing maximum charging current without damaging the IC. The two step-down converters are optimized for small size inductor and high efficiency applications. They utilize a proprietary hysteretic PWM control scheme that switches with nearly fixed frequency and is adjustable, allowing the customer to trade some efficiency for smaller external component as desired. The LDO linear regulators provide high power supply rejection rate and have only 45 μVRMS of output noises for 100Hz to 10kHz frequency range to power noise sensitive RF sections. The RT9941 is available in WQFN-40L 5x5 package. Features Charger Adapter & Battery Two Input with Auto Power Dynamic Path. PWR_IN LDO support continuous 1.5A, peak 2A current 4.5V to 5.5V Operation Voltage Range with Max. Input 18V from PWR_IN Pin Switch Well for LDO and Charger Power MOSFET Set Charge Current by ISETA Pin Charge Status Indicator Interrupt for PWR_IN Plug In/Out Time Out and Charger Done. Battery Temperature Monitoring Hysteretic Buck Buck 1 for DDR Memory, Adjustable Voltage and 600mA Output Current Buck 2 for PDN with 25mV/step I2C Adjustable 800mA Output Current Max. Efficiency Up to 90% LDO LDO1 : 3.3V/500mA for I/O, Default ON LDO2 : 1.2V/80mA for PLL, Default ON LDO3 : 1.2V/80mA for Pre-Core. I2C Adiustable, Sync. with Buck2, Default ON LDO4 : 2.5V/50mA for AVDD of USB, ADC, TSC, Default ON LDO5 : 3.3V/50mA for AVDD of USB, Default ON Minimize the External Component Counts Other System Reset Low Voltage Detector I2C Compatible Interface Power ON Timing Control RoHS Compliant and Halogen Free Package Type QW : WQFN-40L 5x5 (W-Type) Lead Plating System G : Green (Halogen Free and Pb Free) RT9941 |
Similar Part No. - RT9941 |
|
Similar Description - RT9941 |
|
|
Link URL |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link to Datasheet | 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 |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
