LM5116MHX/NOPB Power Path Management IC Switching Controllers WIDE RANGE SYNCH BUCK CONTROLLER
microchip battery management
,power management integrated circuit
LM5116MHX/NOPB Power Path Management IC Switching Controllers WIDE RANGE SYNCH BUCK CONTROLLER
1 Features
- Emulated Peak Current Mode
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Wide Operating Range Up to 100 V
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Low IQ Shutdown (< 10 μA)
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Drives Standard or Logic Level MOSFETs
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Robust 3.5-A Peak Gate Drive
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Free-run or Synchronous Operation to 1 MHz
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Optional Diode Emulation Mode
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Programmable Output from 1.215 V to 80 V
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Precision 1.5% Voltage Reference
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Programmable Current Limit
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Programmable Soft-Start
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Programmable Line Undervoltage Lockout
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Automatic Switch to External Bias Supply
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HTSSOP-20 Exposed Pad
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Thermal Shutdown
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Create a Custom Design Using the LM5116 with the WEBENCH Power Designer
2 Applications
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Automotive Infotainment
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Industrial DC-DC Motor Drivers
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Automotive USB Adapters
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Telecom Servers
3 Description
The LM5116 is a synchronous buck controller 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 kHz to 1 MHz. The LM5116 drives external high-side and low-side NMOS power switches with adaptive dead-time control. A user-selectable diode emulation mode enables discontinuous mode operation, for improved efficiency at light load conditions. A low quiescent current shutdown disables the controller and consumes less than 10 μA of total input current.
Additional features include a high-voltage bias regulator, automatic switch-over to external bias for improved efficiency, thermal shutdown, frequency synchronization, cycle-by-cycle current limit, and adjustable line undervoltage lockout. The device is available in a power enhanced HTSSOP-20 package featuring an exposed die attach pad to aid thermal dissipation.
Device Information
|
PART NUMBER |
PACKAGE |
BODY SIZE (NOM) |
|
LM5116 |
HTSSOP (20) |
6.50 mm × 4.40 mm |
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