Texas Instruments LM3241
The LM3241 is a DC-DC converter optimized for powering RF power amplifiers (PAs) from a single Lithium-Ion cell. The device can also be used in many other applications. The device steps down an input voltage from 2.7 V to 5.5 V to an adjustable output voltage from 0.6 V to 3.4 V.| Part No. | LM3241 |
|---|---|
| Datasheet | LM3241 Download |
| Manufacturer |  Texas Instruments |
| Description | Step-Down DC-DC Converter |
| Buy | Stock & Price |
FEATURES
●1 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 2
APPLICATIONS
● Battery-Powered 3G and 4G Power Amplifiers● Hand-Held Radios
● RF PC Cards
● Battery-Powered RF Devices 3
DESCRIPTION
The output voltage is set using a VCON analog input for controlling power levels and efficiency of the RF PA. The LM3241 offers three 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 conditions, the device enters into Eco-mode automatically and operates with reduced switching frequency.
