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TI LM5121MHX/NOPB product image
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TI LM5121MHX/NOPBRoHS

Manufacturer
TI
MPN
LM5121MHX/NOPB
LCSC Part #
C1848483
Packaging
HTSSOP-20-EP
Customer #
Key Attributes
Wide-input synchronous boost controller with disconnect switch control
Datasheetpdf iconTI LM5121MHX/NOPB

Products Specifications

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TypeDescription
CategoryIntegrated Circuits (ICs)/Power Management (PMIC)/DC DC Switching Controllers
ManufacturerTI
PackagingHTSSOP-20-EP
Synchronous RectifierYes
Operating Temperature-40℃~+125℃@(TJ)
FeaturesAdjustable current limiting;Cycle-by-cycle current limiting;Hiccup current limiting;Adjustable soft-start;Load disconnect;Frequency synchronization;Light load efficient mode;Overcurrent Protection
Output Current-
Number of Channels1
TopologyBoost
Frequency - Switching1MHz
Operating Voltage4.5V~65V
Output Voltage-
FunctionBoost
Quiescent Current9uA
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Additional Information

TypeDetails
Minimum1
Multiple1
Standard Packaging2500
Sales UnitPiece

Introduction

AI Translation

The LM5121 is a synchronous boost controller designed for high-efficiency, high-power boost regulator applications. The control method is based on peak current mode control, which provides inherent line feedforward, cycle-by-cycle current limiting, and simplified loop compensation. Switching frequency is programmable up to 1MHz. Higher efficiency is achieved by combining two robust N-channel MOSFET gate drivers with adaptive dead-time control. A user-selectable diode emulation mode enables discontinuous mode operation, improving efficiency under light load conditions. The LM5121 features a disconnect switch control that fully isolates the output from the input during output short-circuit conditions or shutdown. During the startup sequence, the disconnect switch control limits inrush current. An internal charge pump allows the high-side synchronous switch to operate at 100% duty cycle (bypass operation). Additional features include: thermal shutdown, frequency synchronization, discontinuous mode current limiting, and adjustable line undervoltage lockout.

Features

AI Translation
  • AEC-Q100 Grade 1 (TA = -40°C to 125°C)
  • Maximum input voltage: 65V
  • Minimum input voltage: 3.0V (4.5V at startup)
  • Output voltage up to 100V
  • Pass-through (VOUT = VIN) operation
  • 1.2V reference voltage with ±1.0% accuracy
  • Free-running/synchronous operation frequency up to 1MHz
  • Peak current mode control
  • Robust 3A integrated gate driver
  • Adaptive dead-time control
  • Optional diode emulation mode
  • Programmable cycle-by-cycle current limit
  • Programmable line UVLO
  • Programmable soft-start
  • Thermal shutdown protection
  • Low shutdown quiescent current: 9μA
  • Programmable slope compensation
  • Programmable skip-cycle mode for reduced standby power
  • External VCC bias supply option
  • Load disconnect in shutdown (true shutdown) mode
  • Inrush current limiting
  • Discontinuous mode short-circuit/overload protection
  • Circuit breaker function
  • Input transient suppression capability
  • Battery reverse protection with thermally enhanced 20-pin HTSSOP package

Applications

AI Translation
  • 12V, 24V, and 48V power supply systems
  • Automotive start-stop
  • High-current boost power supplies
  • Battery-powered systems
In-Stock: 2,548
2,548 In stock, ships now
Add to BOM List
QtyUnit PriceTotal Amount
1+$ 3.5528$ 3.55
10+$ 3.0144$ 30.14
30+$ 2.6934$ 80.80
100+$ 2.3691$ 236.91
500+$ 2.2199$ 1109.95
1,000+$ 2.1534$ 2153.40
Standard Packaging2500/Full Reel
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