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LM3241TLE/NOPB

6MHz, 750mA Miniature, Adjustable, Step-Down DC-DC Converter for RF Power Amplifiers

Packaging

Package | PIN: YZR | 6
Temp: I (-40 to 85)
Carrier: Cut Tape
Qty Price
1-9 $1.00
10-24 $0.89
25-99 $0.83
100-249 $0.71
250-499 $0.65
500-749 $0.53
750-999 $0.42
1000+ $0.38

Features

  • 6-MHz (typ.) PWM Switching Frequency
  • Operates from a Single Li-Ion Cell (2.7 V to 5.5 V)
  • Adjustable Output Voltage (0.6 V to 3.4 V)
  • 750-mA Maximum Load Capability
  • High Efficiency (95% typ. at 3.9 VIN, 3.3 VOUT at 500 mA)
  • Automatic Eco-mode™ and PWM Mode Change
  • 6-Bump DSBGA Package
  • Current Overload Protection
  • Thermal Overload Protection
  • Soft Start Function
  • CIN and COUT are 0402 (1005) Case Size and 6.3 V of Rated-Voltage Ceramic Capacitor
  • Small Chip Inductor in 0805 (2012) Case Size

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Texas Instruments  LM3241TLE/NOPB

The LM3241 is a DC-DC converter optimized for powering RF power amplifiers (PAs) from asingle Lithium-Ion cell. The device can also be used in many other applications. The device stepsdown an input voltage from 2.7 V to 5.5 V to an adjustable output voltage from 0.6 V to 3.4 V. Theoutput voltage is set using a VCON analog input for controlling power levels and efficiency of theRF PA.

The LM3241 offers three modes of operation. In PWM mode the device operates at a fixedfrequency of 6 MHz (typical) which minimizes RF interference when driving medium-to-heavy loads. Atlight-load conditions, the device enters into Eco-mode automatically and operates with reducedswitching 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).

The LM3241 is available in a 6-bump lead-free DSBGA package. A high-switching frequency(6 MHz) allows use of tiny surface-mount components. Only three small external surface-mountcomponents, an inductor and two ceramic capacitors are required.