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LM25117PSQ/NOPB ACTIVE

4.5-42V Wide Vin, Current Mode Synchronous Buck Controller with Tracking

Inventory: 37,341  
 

Quality information

RoHS Yes
REACH Yes
Lead finish / Ball material SN
MSL rating / Peak reflow Level-1-260C-UNLIM
Quality, reliability
& packaging information

Information included:

  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
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Packaging information

Package | Pins Package qty | Carrier: Operating temperature range (℃)
WQFN (RTW) | 24 1,000 | SMALL T&R
-40 to 125
Package | Pins WQFN (RTW) | 24
Package qty | Carrier: 1,000 | SMALL T&R
Operating temperature range (℃) -40 to 125
View TI packaging information

Features for the LM25117

  • LM25117-Q1 is Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1: -40°C to 125°C Ambient Operating TemperatureRange
  • Emulated Peak Current Mode Control
  • Wide Operating Range from 4.5 V to 42 V
  • Robust 3.3 A Peak Gate Drives
  • Adaptive Dead-time Output Driver Control
  • Free-run or Synchronizable Clock up to 750 kHz
  • Optional Diode Emulation Mode
  • Programmable Output from 0.8 V
  • Precision 1.5% Voltage Reference
  • Analog Current Monitor
  • Programmable Current Limit
  • Hiccup Mode Over Current Protection
  • Programmable Soft-start and Tracking
  • Programmable Line Undervoltage Lockout
  • Programmable Switch-over to External Bias Supply
  • Thermal Shutdown

All trademarks are the property of their respective owners.

Description for the LM25117

The LM25117 is a synchronous buck controller intended for step-down regulatorapplications from a high voltage or widely varying input supply. The control method is based uponcurrent mode control utilizing an emulated current ramp. Current mode control provides inherentline feed-forward, cycle-by-cycle current limiting and ease of loop compensation. The use of anemulated control ramp reduces noise sensitivity of the pulse-width modulation circuit, allowingreliable control of very small duty cycles necessary in high input voltage applications.

The operating frequency is programmable from 50 kHz to 750 kHz. The LM25117 drivesexternal high-side and low-side NMOS power switches with adaptive dead-time control. Auser-selectable diode emulation mode enables discontinuous mode operation for improved efficiencyat light load conditions. A high voltage bias regulator that allows external bias supply furtherimproves efficiency. The LM25117’s unique analog telemetry feature provides average output currentinformation. Additional features include thermal shutdown, frequency synchronization, hiccup modecurrent limit and adjustable line undervoltage lockout.

Pricing


Qty Price (USD)
1-99 3.022
100-249 2.648
250-999 1.857
1,000+ 1.496

Additional package qty | carrier options

Package qty | Carrier 250 | SMALL T&R
Inventory 19,358
Qty | Price (USD) 1ku | 1.727 1-99 3.489 100-249 3.057 250-999 2.143 1,000+ 1.727

Package qty | Carrier 4,500 | LARGE T&R
Inventory 9,980
Qty | Price (USD) 1ku | 1.496 1-99 3.022 100-249 2.648 250-999 1.857 1,000+ 1.496
Custom reel may be available