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TI LM3243TMX/NOPB product image
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TI LM3243TMX/NOPB

Manufacturer
TI
MPN
LM3243TMX/NOPB
LCSC Part #
C2155947
Packaging
DSBGA-16
Customer #
Key Attributes
DSBGA-16 Power Management - Specialized RoHS
DatasheetTI LM3243TMX/NOPB
RoHS Compliance1 documents available
Every Order Guarantee
100% Authentic · 30-Day Return or Replacement

Products Specifications

All
TypeDescription
CategoryIntegrated Circuits (ICs)/Power Management (PMIC)/Power Management - Specialized
ManufacturerTI
PackagingDSBGA-16
FeaturesLight load efficient mode;Dynamic voltage scaling;Overcurrent Protection
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Introduction

AI Translation

The LM3243 is a DC-DC converter optimized for powering multi-mode 2G/3G/4G RF power amplifiers (PAs) from a single-cell lithium-ion battery. The LM3243 steps down an input voltage of 2.7V to 5.5V to a dynamically adjustable output voltage in the range of 0.4V to 3.6V. This output voltage is set via a VCON analog input that regulates the output voltage, ensuring efficient operation of the RF PA across all power levels. The LM3243 operates in constant-frequency PWM mode, generating minimal and predictable output voltage ripple. This enables optimal ECTEL power requirements for GMSK and EDGE spectral compliance while significantly reducing filtering requirements and excess margins. When operating in PFM mode, the LM3243 achieves the lowest DG09 current consumption, greatly improving system efficiency. The LM3243 features a unique Active Current Bypass (ACB) characteristic to significantly reduce inductor size without any degradation in output regulation across the full battery voltage and RF output power range prior to dropout. When needed, ACB provides a parallel current path, enabling a 2.5A load to be driven while limiting the maximum inductor current to 1.4A (typical). ACB also enables minimum dropout voltage operation. The LM3243 is available in a 2mm x 2mm chip-scale 16-solder bump DSBGA package.

Features

AI Translation
  • High-efficiency PFM and PWM modes with internal synchronous rectification
  • Analog bypass with low dropout resistance (45mΩ typical)
  • Dynamically adjustable output voltage in PFM and PWM modes, 0.4V to 3.6V (typical)
  • Maximum load current 2.5A in PWM mode
  • 2.7MHz (average) PWM switching frequency
  • Modulated switching frequency for Rx band compatibility
  • Single-cell Li-ion battery supply (2.7V to 5.5V) operation
  • Active Current Boost with analog bypass mode (ACB) reduces inductor requirements and size
  • Significantly reduced overall solution size through small-package inductors and capacitors with compact case sizes
  • 16-solder-bump DSBGA package
  • Current overload and thermal overload protection

Applications

AI Translation
  • Mobile phones
  • Handheld radios
  • RF PC cards
  • Battery-powered RF devices