Datasheet
RoHS Compliance Information
| Size in Kbytes | Date |
 |
| LM27341/LM27342/LM27341Q/LM27342Q 2 MHz 1.5A/2A Wide Input Range Step-Down DC-DC Regulator with Frequency Synchronization |
749
Kbytes |
22-Oct-09 |
Download |
Package Availability, Models, Samples & Pricing
General Description
The LM27341 and LM27342 regulators are monolithic, high frequency, PWM step-down DC-DC converters in 10-pin LLP and 10-pin
eMSOP packages. They contain all the active functions to provide local DC-DC conversion with fast transient response and accurate
regulation in the smallest possible PCB area.
With a minimum of external components the LM27341 and LM27342 are easy to use. The ability to drive 1.5A or 2A loads respectively,
with an internal 150 mΩ NMOS switch results in the best power density available. The world-class control circuitry allows
for on-times as low as 65 ns, thus supporting exceptionally high frequency conversion. Switching frequency is internally set
to 2 MHz and synchronizable from 1 to 2.35 MHz, which allows the use of extremely small surface mount inductors and chip
capacitors. Even though the operating frequency is very high, efficiencies up to 90% are easy to achieve. External shutdown
is included featuring an ultra-low shutdown current of 70 nA. The LM27341and LM27342 utilize peak current-mode control and
internal compensation to provide high-performance regulation over a wide range of operating conditions. Additional features
include internal soft-start circuitry to reduce inrush current, pulse-by-pulse current limit, thermal shutdown, and output
over-voltage protection.
Application Notes
| Title | Size in Kbytes |
Date |
|
| AN-1929: Application Note 1929 LM27342 Demonstration Board |
507
Kbytes |
20-Nov-08 |
Download |
| AN-1973: Application Note 1973 Benefits and Challenges of High-Frequency Regulators |
348
Kbytes |
25-Jun-09 |
Download |
| AN-1197: Application Note 1197 Selecting Inductors for Buck Converters |
371
Kbytes |
1-May-04 |
Download |
AN-1197 (Japanese): Application Note 1197 Selecting Inductors for Buck Converters
 |
304 Kbytes |
|
 |
AN-1197 (Chinese): Application Note 1197 Selecting Inductors for Buck Converters
|
515 Kbytes |
|
 |
| AN-1187: Application Note 1187 Leadless Leadframe Package (LLP) |
2065
Kbytes |
11-Oct-07 |
Download |
AN-1187 (Japanese): Application Note 1187 Leadless Leadframe Package (LLP)
|
1878 Kbytes |
|
|
AN-1187 (Chinese): Application Note 1187 Leadless Leadframe Package (LLP)
|
5580 Kbytes |
|
|
| AN-1520: Application Note 1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages |
2176
Kbytes |
7-Sep-06 |
Download |
AN-1520 (Chinese): Application Note 1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages
|
849 Kbytes |
|
|
| AN-1229: Application Note 1229 SIMPLE SWITCHER PCB Layout Guidelines |
229
Kbytes |
1-May-04 |
Download |
AN-1229 (Japanese): Application Note 1229 SIMPLE SWITCHER PCB Layout Guidelines
|
304 Kbytes |
|
|
AN-1229 (Chinese): Application Note 1229 SIMPLE SWITCHER PCB Layout Guidelines
|
668 Kbytes |
|
|
More Application Notes
| Title | Size in Kbytes |
Date |
|
| AN-1822: Application Note 1822 LMH6733 High Definition Video Transmission Over CAT5 |
691
Kbytes |
14-Jan-09 |
Download |
[Information as of 8-Nov-2009]
|
