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 |
| LM34914EVAL | Ultra Small 1.25A Step-Down Switching Regulator with Intelligent Current Limit | Full production | N/A
|
| 1+ | $31.50 | 1 | - |
| 8 weeks | N/A |
| LM34914SD | LLP | 10 | NOPB | 1 | 260 | RoHS |
N/A |
Full production | N/A
| 
| 1K+ | $1.30 | reel
of
1000 | ZXYTT
34914 |
| 6 weeks | N/A |
| LM34914SDX | LLP | 10 | NOPB | 1 | 260 | RoHS |
N/A |
Full production | N/A
|
| 1K+ | $1.30 | reel
of
4500 | ZXYTT
34914 |
| 6 weeks | N/A |
General Description
The LM34914 Step-Down Switching Regulator features all the functions needed to implement a low cost, efficient, buck bias
regulator capable of supplying at least 1.25A to the load. To reduce excessive switch current due to the possibility of a
saturating inductor the valley current limit threshold changes with input and output voltages, and the on-time is reduced
when current limit is detected. This buck regulator contains a 44V N-Channel Buck Switch, and is available in the thermally
enhanced 3 mm x 3 mm LLP-10 package. The feedback regulation scheme requires no loop compensation, results in fast load transient
response, and simplifies circuit implementation. The operating frequency remains constant with line and load variations due
to the inverse relationship between the input voltage and the on-time. The valley current limit results in a smooth transition
from constant voltage to constant current mode when current limit is detected, reducing the frequency and output voltage,
without the use of foldback. Additional features include: VCC under-voltage lock-out, thermal shutdown, gate drive under-voltage
lock-out, and maximum duty cycle limit.
Reliability Metrics
| Part Number |
Process |
EFR Reject |
EFR Sample Size |
PPM |
LTA Rejects |
LTA Device Hours |
FITS |
MTTF (Hours) |
|
LM34914SD | ABCD150 | 0 | 34175 | 0 | 0 | 4234000 | 1 | 1201409060
|
|
LM34914SDX | ABCD150 | 0 | 34175 | 0 | 0 | 4234000 | 1 | 1201409060
|
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.
Design Tools
| Title | Size in Kbytes |
Date |
 |
|
|
| LM34914 Quick Start Calculator |
367 Kbytes |
30-Jul-2009 |
View |
|
|
Application Notes
| Title | Size in Kbytes |
Date |
|
| AN-1549: Application Note 1549 LM34914 Evaluation Board |
319
Kbytes |
17-Mar-07 |
Download |
More Application Notes
| Title | Size in Kbytes |
Date |
|
| AN-1349: Application Note 1349 LM34910 Evaluation Board |
562
Kbytes |
18-Nov-04 |
Download |
| AN-1650: Application Note 1650 LM34919 Evaluation Board |
338
Kbytes |
8-Jun-07 |
Download |
AN-1650 (Chinese): Application Note 1650 LM34919 Evaluation Board
|
366 Kbytes |
|
 |
| AN-1601: Application Note 1601 LM34917A Evaluation Board |
1142
Kbytes |
10-Apr-08 |
Download |
[Information as of 8-Nov-2009]
|
RoHS Compliance Information