LM3242 - 6MHz, 750mA Miniature, Adjustable, Step-Down DC-DC

LM3242是TI德州仪器公司的一款转换器（集成开关）产品，LM3242是6MHz, 750mA Miniature, Adjustable, Step-Down DC-DC，本站介绍了LM3242的封装应用图解、特点和优点、功能等，并给出了与LM3242相关的TI元器件型号供参考。

LM3242 - 6MHz, 750mA Miniature, Adjustable, Step-Down DC-DC - 转换器（集成开关） - DC/DC开关稳压器 - 德州仪器

产品特性

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

产品应用

Battery-Powered 3G/4G RF PAs
Battery-Powered RF Devices
Hand-Held Radios
RF PC Cards

产品说明

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.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE (MAX)
LM3242	DSBGA (9)	1.51 mm × 1.385 mm

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