 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
LM46001 Datasheet(PDF) 3 Page - Texas Instruments |
|
||||||||||||||||||||||||||||||
LM46001 Datasheet(HTML) 3 Page - Texas Instruments |
|
|
3 / 52 page  SW VIN PGND CBOOT VCC BIAS SYNC RT PGOOD EN SS/TRK AGND FB SW PGND VIN PAD 1 16 2 3 4 5 6 8 7 9 15 14 13 12 11 10 LM46001 www.ti.com SNVSA46A – JUNE 2014 – REVISED JULY 2014 5 Pin Configuration and Functions 16-Pin HTSSOP (PWP) Top View Pin Functions PIN DESCRIPTION NAME NUMBER Switching output of the regulator. Internally connected to both power MOSFETs. Connect SW 1,2 to power inductor. Boot-strap capacitor connection for high-side driver. Connect a high quality 470 nF CBOOT 3 capacitor from CBOOT to SW. Internal bias supply output for bypassing. Connect bypass capacitor from this pin to VCC 4 AGND. Do not connect external load to this pin. Never short this pin to ground during operation. Optional internal LDO supply input. To improve efficiency, it is recommended to tie to VOUT when 3.3 V ≤ VOUT ≤ 28 V, or tie to an external 3.3 V or 5 V rail if available. When BIAS 5 used, place a bypass capacitor (1 to 10 µF) from this pin to ground. Tie to ground if not used (VOUT < 3.3 V). Do not float. Clock input to synchronize switching action to an external clock. Use proper high speed SYNC 6 termination to prevent ringing. Connect to ground if not used. Do not float. Connect a resistor RT from this pin to AGND to program switching frequency. Leave RT 7 floating for 500 kHz default switching frequency. Open drain output for power-good flag. Use a 10 k Ω to 100 kΩ pull-up resistor to logic rail PGOOD 8 or other DC voltage no higher than 12 V. Feedback sense input pin. Connect to the midpoint of feedback divider to set VOUT. Do FB 9 not short this pin to ground during operation. Analog ground pin. Ground reference for internal references and logic. Connect to system AGND 10 ground. Soft-start control pin. Leave floating for internal soft-start. Connect to a capacitor to SS/TRK 11 extend soft start time. Connect to external voltage ramp for tracking. Enable input to the LM46001: High = ON and LOW = OFF. Connect to VIN, or to VIN EN 12 through resistor divider, or to an external voltage or logic source. Do not float. Supply input pins to internal LDO and high side power FET. Connect to power supply and VIN 13,14 bypass capacitors CIN. Path from VIN pin to high frequency bypass CIN and PGND must be as short as possible. Power ground pins, connected internally to the low side power FET. Connect to system PGND 15,16 ground, PAD, AGND, ground pins of CIN and COUT. Path to CIN must be as short as possible. Low impedance connection to AGND. Connect to PGND on PCB. Major heat dissipation PAD 17 path of the die. Must be used for heat sinking to ground plane on PCB. Copyright © 2014, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Links: LM46001 |
Similar Part No. - LM46001_15 |
|
Similar Description - LM46001_15 |
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.NET |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | 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
