Datasheet
Package Availability, Models, Samples & Pricing
| Part Number | Package | Factory Lead Time | Models | Samples &
Electronic
Orders | Budgetary Pricing | Std
Pack
Size | Package
Marking
Format |
| Type | Pins | Spec. | MSL
Rating | Peak
Reflow | RoHS
Report | CAD
Symbols | Weeks | Qty | Qty | $US each |
| LM2842XMK-ADJL | TSOT | 6 | NOPB | 1 | 260 | RoHS |
N/A |
Full production | N/A
| 
| 1K+ | $1.54 | reel
of
1000 | STVB
XTT |
| 6 weeks | N/A |
| LM2842YMK-ADJL | TSOT | 6 | NOPB | 1 | 260 | RoHS |
N/A |
Full production | N/A
|
| 1K+ | $1.60 | reel
of
1000 | STXB
XTT |
| 6 weeks | N/A |
| LM2842XMKX-ADJL | TSOT | 6 | NOPB | 1 | 260 | RoHS |
N/A |
Full production | N/A
|
| 1K+ | $1.54 | reel
of
3000 | STVB
XTT |
| 6 weeks | N/A |
| LM2842YMKX-ADJL | TSOT | 6 | NOPB | 1 | 260 | RoHS |
N/A |
Full production | N/A
|
| 1K+ | $1.60 | reel
of
3000 | STXB
XTT |
| 6 weeks | N/A |
| LM2842XMK-ADJEV | Evaluation Board for the LM2842 | Full production | N/A
|
| 1+ | $55.60 | 1 | - |
| 8 weeks | N/A |
| Obsolete Part | Alternate Part or
Supplier | Source | Last Time Buy Date |
LM2842XMK-ADJ
| NONE
| NONE
| 30 Nov 2009
|
LM2842XMKX-ADJ
| NONE
| NONE
| 30 Nov 2009
|
General Description
The LM2841 and LM2842 are PWM DC/DC buck (step-down) regulators. With a wide input range from 4.5V-42V, they are suitable
for a wide range of applications such as power conditioning from unregulated sources. They feature a low RDSON (0.9Ω typical) internal switch for maximum efficiency (85% typical). Operating frequency is fixed at 550 kHz (X version)
and 1.25 MHz (Y version) allowing the use of small external components while still being able to have low output voltage ripple.
Soft-start can be implemented using the shutdown pin with an external RC circuit allowing the user to tailor the soft-start
time to a specific application.
The LM2842 is optimized for up to 600 mA load currents while the LM2841 is optimized for up to 300 mA load current. Both have
a 0.765V nominal feedback voltage.
Additional features include: thermal shutdown, VIN under-voltage lockout, and gate drive under-voltage lockout. The LM2841 and LM2842 are available in a low profile TSOT-6L
package.
Reliability Metrics
| Part Number |
Process |
EFR Reject |
EFR Sample Size |
PPM |
LTA Rejects |
LTA Device Hours |
FITS |
MTTF (Hours) |
|
LM2842XMK-ADJL | ABCD5 | 0 | 5364 | 0 | 0 | 1626984 | 3 | 461661152
|
|
LM2842XMKX-ADJL | ABCD5 | 0 | 5364 | 0 | 0 | 1626984 | 3 | 461661152
|
|
LM2842YMK-ADJL | ABCD5 | 0 | 5364 | 0 | 0 | 1626984 | 3 | 461661152
|
|
LM2842YMKX-ADJL | ABCD5 | 0 | 5364 | 0 | 0 | 1626984 | 3 | 461661152
|
Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR.
The Long Term Failure Rates were calculated
at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress
temperature of 150°C to an application temperature of 55°C.
For more information on Reliability Metrics, please click here.
Reference Designs
Application Notes
| Title | Size in Kbytes |
Date |
 |
| AN-1908: Application Note 1908 LM2842 Evaluation Board |
427
Kbytes |
2-Sep-09 |
Download |
| AN-1982: Application Note 1982 Small, Wide Input Voltage Range LM2842 Keeps LEDs Cool |
63
Kbytes |
15-Jul-09 |
Download |
More Application Notes
| Title | Size in Kbytes |
Date |
|
| AN-1876: Application Note 1876 LM2841 Evaluation Board |
385
Kbytes |
2-Sep-09 |
Download |
[Information as of 7-Nov-2009]
|
RoHS Compliance Information