 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
LMK212BJ226MG-T Datasheet(PDF) 1 Page - Advanced Monolithic Systems Ltd |
|
||||||||||||||||||||||||||||||
LMK212BJ226MG-T Datasheet(HTML) 1 Page - Advanced Monolithic Systems Ltd |
|
|
1 / 18 page  AMS4123 3A 20V Step-Down Converter + 1A LDO 3/5/2010 www.advanced-monolithic.com Phone (925) 443-0722 1 Fax (925) 443-0723 General Description The AMS4123 combines a 3A Step-Down converter with a 1A LDO in a single SO-8 exposed paddle package. Both the LDO and Step-Down converter are low ESR, ceramic capacitor output, stable. The Step-Down converter is internally compensated with internal soft-start to minimize the number of external components. An Enable pin provides built-in externally programmable power-up sequencing. The Step-Down converter enable threshold is 2.0V and the LDO enable threshold is 2.5V. It also has hiccup current limit and thermal protection. Thermal protection shuts down both the Step-Down converter and LDO when the die temperature exceeds 135°C. Both regulators are adjustable using a 0.6V reference for low output voltage settings. The LDO has options for fixed output voltages from 0.6V to 5V in 100mV steps. The LDO external input can be powered from the Step-Down converter output, for improved efficiency, or from any voltage source that is less than or equal to the device supply voltage (Vin). With a dropout voltage of less than 350mV at 1A, the AMS4123 LDO makes the perfect solution for a low noise 1.8V power source developed from 2.5V Step-Down converter output. The AMS4123 is a complete solution for LCD TV power requirements when combined with the AMS4122 (2A Dual Switching Regulator in SO-8). Features • Step-Down Converter + LDO in SO-8EP • Internally Compensated • Up to 95% Efficiency • Low ESR Ceramic Output Capacitor Stable • Soft Start • Under-Voltage Lockout • Dual Threshold Enable • 300 kHz Switching Frequency • Hiccup Current Limit • Over-Temperature Shutdown • Ultra-Low Dropout LDO 350mV @ 1A • Up to 3A Step-Down Output Current • Up to 1A LDO Output Current • Excellent Light Load Efficiency Applications • Audio Power Amplifiers • Portable (Notebook) Computers • Point of Regulation for High Performance Electronics • Consumer Electronics • DVD, Blue-ray DVD writers • LCD TVs and LCD monitors • Distributed Power Systems • Battery Chargers • Pre-Regulator for Linear Regulation Typical Application L1 10uH C5 220nF R2 10.0k R4 31.6k R3 10.0k D1 B340LB R1 20.0k C3 2.2uF C1 10uF C8 4.7nF C2 22uF C9 100uF R1 and R4 Voltage Options 3.3V 45.3k 2.5V 31.6k 5.0V 73.2k 1.8V 20.0k 2.5V at 2A 1.8V at 1A Enable Vin 4.5V to 20V LDOout 8 EN 4 Vin 3 BST 2 SW 1 FB LDO 6 LDOin 7 FB SW 5 U1 AMS4123 2.5V SW out |
Similar Part No. - LMK212BJ226MG-T |
|
Similar Description - LMK212BJ226MG-T |
|
|
|
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 |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
