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TEXAS INSTRUMENTS  LM25117PMHE/NOPB  DC/DC Controller, Current Mode, 4.5V to 42V, 1 Output, Synchronous Buck, 750kHz, HTSSOP-20

TEXAS INSTRUMENTS LM25117PMHE/NOPB
Technical Data Sheet (10.16KB) EN See all Technical Docs

Image is for illustrative purposes only. Please refer to product description.

Product Overview

The LM25117PMHE/NOPB is a current-mode Synchronous Buck Controller with tracking. It is intended for step-down regulator applications from a high voltage or widely varying input supply. The control method is based upon current-mode control utilizing an emulated current ramp. current-mode control provides inherent line feed-forward, cycle-by-cycle current limiting and ease of loop compensation. The use of an emulated control ramp reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of very small duty cycles necessary in high input voltage applications. The operating frequency is programmable from 50 to 750kHz. The LM25117 drives external high-side and low-side NMOS power switches with adaptive dead-time control. User-selectable diode emulation mode enables discontinuous mode operation for improved efficiency at light load conditions. A high voltage bias regulator that allows external bias supply further improves efficiency.
  • Emulated peak current mode control
  • Adaptive dead-time output driver control
  • Optional diode emulation mode
  • Programmable output from 0.8V
  • 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
  • Green product and no Sb/Br
Device has limited built-in ESD protection, leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.

 

Product Information

Supply Voltage Min:
4.5V
Supply Voltage Max:
42V
No. of Outputs:
1 Output
Duty Cycle (%):
98%
Controller IC Case Style:
HTSSOP
No. of Pins:
20Pins
Switching Frequency:
750kHz
Topology:
Synchronous Buck (Step Down)
Operating Temperature Min:
-40°C
Operating Temperature Max:
125°C
Packaging:
Each
Product Range:
-
Automotive Qualification Standard:
-
MSL:
MSL 3 - 168 hours
SVHC:
No SVHC (15-Jun-2015)

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Applications

  • Power Management;
  • Industrial;
  • Automotive;
  • Communications & Networking

Legislation and Environmental

Moisture Sensitivity Level:
MSL 3 - 168 hours
Country of Origin:
United States

Country in which last significant manufacturing process was carried out

RoHS Compliant:
Yes
Tariff No:
85423990
Weight (kg):
.000299