The LM46002QPWPTQ1 regulator is an easy-to-use synchronous step-down DC/DC converter capable ofdriving up to 2 A of load current from an input voltage ranging from 3.5 V to 60 V. The LM46002provides exceptional efficiency, output accuracy and drop-out voltage in a very small solutionsize. An extended family is available in various load current options and 36-V maximum inputvoltage in pin-to-pin compatible packages, including LM46001, LM46000, LM43603, LM43602, LM43601and LM43600. Peak-current-mode control is employed to achieve simple control-loop compensation andcycle-by-cycle current limiting. Optional features such as programmable switching frequency,synchronization, power-good flag, precision enable, internal soft start, extendable soft start, andtracking provide a flexible and easy-to-use platform for a wide range of applications.Discontinuous conduction and automatic frequency reduction at light loads improve light loadefficiency. The family requires few external components. Pin arrangement allows simple, optimum PCBlayout. Protection features include thermal shutdown, VCC undervoltagelockout, cycle-by-cycle current limit, and output short-circuit protection. The LM46002QPWPTQ1 device isavailable in the 16-lead HTSSOP / PWP package (6.6 mm × 5.1 mm × 1.2 mm) with 0.65-mm lead pitch.
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Feature
- 27-μA Quiescent current in regulation
- High efficiency at light load (DCM and PFM)
- Meets EN55022/CISPR 22 EMI standards
- Integrated synchronous rectification
- Adjustable frequency range: 200 kHz to 2.2 MHz (500 kHz default)
- Frequency synchronization to external clock
- Internal compensation
- Stable with almost any combination of ceramic, polymer, tantalum, and aluminum capacitors
- Power-good flag
- Soft start into prebiased load
- Internal soft start: 4.1 ms
- Extendable soft-start time by external capacitor
- Output voltage tracking capability
- Precision enable to program system UVLO
- Output short-circuit protection with hiccup mode
- Overtemperature thermal shutdown protection
- Create a custom design using the LM46002 with the WEBENCH Power Designer
