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LM3204 Scheda tecnica(PDF) 1 Page - Texas Instruments |
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LM3204 Scheda tecnica(HTML) 1 Page - Texas Instruments |
1 / 24 page BYP FB EN VDD PVIN VCON SW VIN 2.7V to 5.5V VOUT 0.8V to 3.6V C1 10 PF C2 4.7 PF SGND PGND L1 2.2 PH LM3204 VCON 0.267V to 1.20V VOUT = 3 x VCON BYPOUT C4 0.1 PF LM3204 www.ti.com SNVS351C – JUNE 2005 – REVISED APRIL 2013 LM3204 Miniature, Adjustable, Step-Down DC-DC Converter with Bypass Mode for RF Power Amplifiers Check for Samples: LM3204 1 FEATURES DESCRIPTION The LM3204 is a DC-DC converter optimized for 2 • 2MHz (typ.) PWM Switching Frequency powering RF power amplifiers (PAs) from a single • Operates from a Single Li-Ion Cell (2.7V to Lithium-Ion cell. It steps down an input voltage of 5.5V) 2.7V to 5.5V to an adjustable output voltage of 0.8V • Adjustable Output Voltage (0.8V to 3.6V) to 3.6V. The output voltage is set using an analog input ( VCON) for optimizing efficiency of the RF PA at • Fast Turn On Time When Enabled (50µs Typ.), various power levels. 3GPP Compliant The LM3204 offers superior features and • 300mA Maximum Load Capability (PWM Mode) performance for mobile phones and similar RF PA • 500mA Maximum Load Capability (Bypass applications. Fixed-frequency PWM mode minimizes Mode) RF interference. Bypass mode turns on an internal • PWM, Forced and Automatic Bypass Mode bypass switch to power the PA directly from the battery. LM3204 has both forced and automatic • High Efficiency (96% Typ. at 3.6VIN, 3.2VOUT at bypass modes. Shutdown mode turns the device off 120mA) and reduces battery consumption to 0.1µA (typ.). • 10-pin DSBGA Package The LM3204 is available in a 10-pin lead free DSBGA • Current Overload Protection package. A high switching frequency (2MHz) allows • Thermal Overload Protection use of tiny surface-mount components. Only three small external surface-mount components, an APPLICATIONS inductor and two ceramic capacitors are required. • Cellular Phones • Hand-Held Radios • RF PC Cards • Battery Powered RF Devices TYPICAL APPLICATION 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2 All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2005–2013, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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