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ADI LT8643SIV#PBFRoHS

Manufacturer
ADI
MPN
LT8643SIV#PBF
LCSC Part #
C674136
Packaging
LQFN-24-EP(4x4)
Customer #
Key Attributes
42V, 6A Synchronous Step-Down Silent Switcher 2 with 2.5uA Quiescent Current
Datasheetpdf iconADI LT8643SIV#PBF
In-Stock: 38
38 In stock, ships now
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QtyUnit PriceTotal Amount
1+$ 13.6765$ 13.68
10+$ 11.8732$ 118.73
30+$ 10.7742$ 323.23
100+$ 9.8514$ 985.14
Standard Packaging540/Full Tray
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Products Specifications

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TypeDescription
CategoryIntegrated Circuits (ICs)/Power Management (PMIC)/Voltage Regulators - DC DC Switching Regulators
ManufacturerADI
PackagingLQFN-24-EP(4x4)
Operating Temperature-40℃~+125℃@(TJ)
Frequency - Switching3MHz
FunctionStep-down type
Number of Outputs1
FeaturesEMI optimization (spread spectrum);External compensation;Light load efficient mode;Frequency synchronization;Output voltage tracking
Output TypeAdjustable
TopologyBuck
Operating Voltage3.4V~42V
Switch tube (built-in/external)Built-in
Output Current6A
Output Voltage-
Quiescent Current2.5uA
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Additional Information

TypeDetails
Minimum1
Multiple1
Standard Packaging540
Sales UnitPiece

Introduction

AI Translation

The LT8640S/LT8643S synchronous step-down regulator features second generation Silent Switcher architecture designed to minimize EMI/EMC emissions while delivering high efficiency at high switching frequencies. This includes the integration of bypass capacitors to optimize all the fast current loops inside and make it easy to achieve advertised EMI performance by reducing layout sensitivity. This performance makes the LT8640S/LT8643S ideal for noise- sensitive applications and environments. The fast, clean, low overshoot switching edges enable high efficiency operation even at high switching frequencies, leading to a small overall solution size. Peak current mode control with a 30ns minimum on-time allows high step-down ratios even at high switching frequencies. The LT8643S has external compensation via the V₀ pin to enable current sharing and fast transient response at high switching frequencies. A CLKOUT pin enables synchronizing other regulators to the LT8640S/LT8643S. Burst Mode operation enables ultralow standby current consumption, forced continuous mode can control frequency harmonics across the entire output load range, or spread spectrum operation can further reduce EMI/ EMC emissions. Soft-start and tracking functionality is accessed via the TR/SS pin, and an accurate input voltage UVLO threshold can be set using the EN/UV pin.

Features

AI Translation
  • Silent Switcher Architecture Ultralow EMI/EMC Emissions on Any PCB Eliminates PCB Layout Sensitivity Internal Bypass Capacitors Reduce Radiated EMI Optional Spread Spectrum Modulation
  • High Efficiency at High Frequency Up to 96% Efficiency at 1MHz, 12VIN to 5VOUT Up to 95% Efficiency at 2MHz, 12VIN to 5VOUT
  • Wide Input Voltage Range: 3.4V to 42V
  • 6A Maximum Continuous, 7A Peak Output
  • Ultralow Quiescent Current Burst Mode Operation in 2.5µA Regulating 12VIN to 3.3VOUT (LT8640S) Output Ripple < 10mVP-P
  • External Compensation: Fast Transient Response and Current Sharing (LT8643S)
  • Fast Minimum Switch On-Time: 30ns
  • Low Dropout Under All Conditions: 100mV at 1A
  • Forced Continuous Mode
  • Adjustable and Synchronizable: 200kHz to 3MHz
  • Output Soft-Start and Tracking
  • Small 24-Lead 4mm × 4mm LQFN Package

Applications

AI Translation
  • Automotive and Industrial Supplies
  • General Purpose Step-Down