Features: · High efficiency sleep mode
· 40 µA typical Iq in sleep mode
· 10 µA typical Iq in shutdown mode
· 3.0V minimum input voltage
· 4.0V to 38V continuous input range
· 1.5% reference accuracy
· Cycle-by-cycle current limit
· Adjustable Frequency (150 kHz to 500 kHz)
· Synchronizable to an external clock
· Power Good Flag
· Forced PWM function
· Adjustable Soft-start
· TSSOP-16 exposed pad package
· Thermal Shut DownApplication· Automotive Telematics
· Navigation systems
· In-Dash Instrumentation
· Battery Powered Applications
· Stand-by power for home gateways/set-top boxesPinout
Specifications
| Output Current |
1500 mA |
| Input Min Voltage |
3 Volt |
| Input Max Voltage |
38 Volt |
| Output Min |
1.25 Volt |
| Output Max |
35 Volt |
| Frequency Min |
150 kHz |
| Frequency Max |
500 kHz |
| Efficiency (peak) |
93 % |
| On/Off Pin |
Yes |
| Error Flag |
Yes |
| SoftStart |
Yes |
| Sync Pin |
Yes |
| Inverting |
No |
| Flyback |
No |
| RegType |
Switching Regulator |
| Temperature Min |
-40 deg C |
| Temperature Max |
125 deg C |
| Adjustable Output |
Yes |
| Adj Switch Frequency |
Yes |
| PWM Mode |
Current |
| Topology |
Buck |
| Special Features |
High efficiency sleep mode, 1.5% output voltage accuracy, Quiescent current 40uA |
| Step-Down |
Yes |
| Multiple Output Capability |
No |
| Output Power |
Undefined Watt |
| Output Voltage |
Undefined Volt |
| Output Range |
1.25V to 35V |
| Switching Frequency |
Undefined kHz |
| Feedback Voltage |
1.23 Volt |
| Regulator Family |
Undefined |
| AEC Q-100 Automotive Grade |
Undefined |
| Automotive Selection Guide |
Yes |
| PowerWise |
Yes |
| Synchronous Rectification |
No |
| View Using Catalog |
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications.
Voltages from the indicated pins to GND:
VIN -0.3V to 40V
SW (Note 7) -0.5V to 40V
VDD -0.3V to 7V
VBIAS -0.3V to 10V
FB -0.3V to 6V
BOOT SW -0.3V to SW+7V
PGOOD-0.3V to 7V
FREQ -0.3V to 7V
SYNC -0.3V to 7V
EN -0.3V to 40V
FPWM -0.3V to 7V
SS -0.3V to 7V
Storage Temperature -65to +150
Power Dissipation (Note 2) 2.6 W
Recommended Lead
Temperature
Vapor Phase (70s) 215
Infrared (15s) 220
ESD Susceptibility (Note 3)
Machine Model 200V
Human Body Model 2KV
Charged Device Model 1kV
Operating Ratings (Note 1)
Operating Junction Temp. −40 to 125
Supply Voltage (Note 4) 3.0V to 38V
DescriptionThe LM26001 is a switching regulator designed for the high efficiency requirements of applications with stand-by modes. The device features a low-current sleep mode to maintain efficiency under light-load conditions and current-mode control for accurate regulation over a wide input voltage range. Quiescent current is reduced to 10 µA typically in shutdown mode and less than 40 µA in sleep mode. Forced PWM mode is also available to disable sleep mode.
The LM26001 can deliver up to 1.5A of continuous load current with a fixed current limit, through the internal N-channel switch. The part has a wide input voltage range of 4.0V to 38V and can operate with input voltages as low as 3V during line transients.
Operating frequency is adjustable from 150 kHz to 500 kHz with a single resistor and can be synchronized to an external clock.
Other features include Power good, adjustable soft-start, enable pin, input under-voltage protection, and an internal bootstrap diode for reduced component count.
Reliability Metrics
| Part Number |
Process |
EFR Reject |
EFR Sample Size |
PPM |
LTA Rejects |
LTA Device Hours |
FITS |
MTTF (Hours) |
| LM26001MXA |
ABCD150 |
0 |
31520 |
0 |
0 |
3739000 |
1 |
1060951459 |
| LM26001MXAX |
ABCD150 |
0 |
31520 |
0 |
0 |
3739000 |
1 |
1060951459 |
| LM26001QMXA |
ABCD150 |
0 |
31520 |
0 |
0 |
3739000 |
1 |
1060951459 |
| LM26001QMXAX |
ABCD150 |
0 |
31520 |
0 |
0 |
3739000 |
1 |
1060951459 |
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 |
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| Counting the Micro Amps |
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View |
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If you have trouble printing or viewing PDF file(s), see Printing Problems.
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Application Notes
| Title |
Size in Kbytes |
Date |
|
| AN-1454: Application Note 1454 LM26001 Evaluation Board |
794 Kbytes |
1-Sep-06 |
Download |
If you have trouble printing or viewing PDF file(s), see Printing Problems.
|
More Application Notes
| Title |
Size in Kbytes |
Date |
|
| AN-1884: Application Note 1884 LM26003 Evaluation Board |
507 Kbytes |
28-Aug-08 |
Download |
If you have trouble printing or viewing PDF file(s), see Printing Problems.
|
LM26001 Data Sheet
