Inicio Gestión de la energía AC/DC & DC/DC converters (integrated FET)
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AC/DC & DC/DC converters (integrated FET)

LM3242

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Convertidor CC-CC reductor ajustable en miniatura de 6 MHz y 750mA con derivación

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LM3242

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Detalles del producto

Iout (max) (A) 1 Vin (min) (V) 2.7 Vin (max) (V) 5.5 Topology Buck Type Converter Switching frequency (min) (kHz) 5700 Switching frequency (max) (kHz) 6300 Features Fixed Output Control mode Voltage mode Vout (min) (V) 0.4 Vout (max) (V) 3.6 Rating Catalog Operating temperature range (°C) -30 to 90 Iq (typ) (A) 0.00006
Iout (max) (A) 1 Vin (min) (V) 2.7 Vin (max) (V) 5.5 Topology Buck Type Converter Switching frequency (min) (kHz) 5700 Switching frequency (max) (kHz) 6300 Features Fixed Output Control mode Voltage mode Vout (min) (V) 0.4 Vout (max) (V) 3.6 Rating Catalog Operating temperature range (°C) -30 to 90 Iq (typ) (A) 0.00006
DSBGA (YFQ) 9 1.96000000000000028000000000000001 mm² 1.4000000000000001 x 1.4000000000000001
  • 2.7-V to 5.5-V Input Voltage Operating From
    Single Li-Ion Cell
  • 6-MHz (typical) PWM Switching Frequency
  • 0.4-V to 3.6-V Adjustable Output Voltage
  • 750-mA Maximum Load Capability
    (up to 1 A in Bypass)
  • High Efficiency (95% typical at 3.9 VIN,
    3.3 VOUT at 500 mA)
  • Automatic ECO/PWM/BP Mode Change
  • Current Overload Protection
  • Thermal Overload Protection
  • Soft-Start Function
  • Small Chip Inductor in 0805 (2012) case size
  • 2.7-V to 5.5-V Input Voltage Operating From
    Single Li-Ion Cell
  • 6-MHz (typical) PWM Switching Frequency
  • 0.4-V to 3.6-V Adjustable Output Voltage
  • 750-mA Maximum Load Capability
    (up to 1 A in Bypass)
  • High Efficiency (95% typical at 3.9 VIN,
    3.3 VOUT at 500 mA)
  • Automatic ECO/PWM/BP Mode Change
  • Current Overload Protection
  • Thermal Overload Protection
  • Soft-Start Function
  • Small Chip Inductor in 0805 (2012) case size

The LM3242 is a DC-DC converter optimized for powering RF power amplifiers (PAs) from a single lithium-ion cell; however, it may be used in many other applications. It steps down an input voltage from 2.7 V to 5.5 V to an adjustable output voltage from 0.4 V to 3.6 V. Output voltage is set using a VCON analog input for controlling power levels and efficiency of the RF PA.

The LM3242 offers five modes of operation. In PWM mode the device operates at a fixed frequency of 6 MHz (typical) which minimizes RF interference when driving medium-to-heavy loads. At light load, the device enters into ECO mode automatically and operates with reduced switching frequency. In ECO mode, the quiescent current is reduced and extends the battery life. Shutdown mode turns the device off and reduces battery consumption to 0.1 µA (typical). In low-battery condition Bypass mode reduces the voltage dropout to less than 50 mV (typical). The part also features a Sleep mode.

The LM3242 is available in a 9-bump lead-free DSBGA package. A high switching frequency (6 MHz) allows use of only three tiny surface-mount components: one inductor and two ceramic capacitors.

The LM3242 is a DC-DC converter optimized for powering RF power amplifiers (PAs) from a single lithium-ion cell; however, it may be used in many other applications. It steps down an input voltage from 2.7 V to 5.5 V to an adjustable output voltage from 0.4 V to 3.6 V. Output voltage is set using a VCON analog input for controlling power levels and efficiency of the RF PA.

The LM3242 offers five modes of operation. In PWM mode the device operates at a fixed frequency of 6 MHz (typical) which minimizes RF interference when driving medium-to-heavy loads. At light load, the device enters into ECO mode automatically and operates with reduced switching frequency. In ECO mode, the quiescent current is reduced and extends the battery life. Shutdown mode turns the device off and reduces battery consumption to 0.1 µA (typical). In low-battery condition Bypass mode reduces the voltage dropout to less than 50 mV (typical). The part also features a Sleep mode.

The LM3242 is available in a 9-bump lead-free DSBGA package. A high switching frequency (6 MHz) allows use of only three tiny surface-mount components: one inductor and two ceramic capacitors.
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Documentación técnica

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Tipo Título Fecha
* Data sheet LM3242 6-MHz, 750-mA Miniature Adjustable Step-Down DC-DC Converter With Auto Bypass for RF Power Amplifiers datasheet (Rev. E) PDF | HTML 27 ago 2015
Selection guide Power Management Guide 2018 (Rev. R) 25 jun 2018
EVM User's guide LM3242 DSBGA Evaluation Board (Rev. AY) 30 abr 2013
Product overview LM3242 Dynamic Output Voltage DC/DC Converter for 3G/4G RF Power Amplifiers 30 ene 2012

Diseño y desarrollo

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Placa de evaluación

LM3242TM-EV — EVM de CC-CC reductor ajustable en miniatura de 6 MHz y 750 mA LM3242

The LM3242 is a DC-DC converter optimized for powering multi-mode 3G/4G RF power amplifiers (PAs) from a single Lithium-Ion cell. The LM3242 steps down an input voltage from 2.7V to 5.5V to a dynamically adjustable output voltage of 0.4V to 3.6V. The output voltage is set through a VCON analog (...)

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DSBGA (YFQ) 9 Ver opciones
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