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LM3203 データシート(PDF) 1 Page - Texas Instruments |
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LM3203 データシート(HTML) 1 Page - Texas Instruments |
1 / 22 page LM3203 VIN 2.7V to 5.5V VOUT 0.8V to 3.6V L1 3.3 PH C1 10 PF C5 0.1 PF C2 4.7 PF VDD PVIN SW FB PGND SGND 10 pF 267k BYPOUT R1 R2 133k C3 BYP VCON EN VCON 0.267V to 1.20V LM3203 www.ti.com SNVS355D – MAY 2005 – REVISED APRIL 2013 LM3203 Step-Down DC-DC Converter with Bypass Mode for CDMA / WCDMA RF Power Amplifiers Check for Samples: LM3203 1 FEATURES DESCRIPTION The LM3203 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. However, they may be used in many 5.5V) other applications. It steps down an input voltage of • Adjustable Output Voltage (0.8V to 3.6V) 2.7V to 5.5V to an adjustable output voltage of 0.8V to 3.6V. The output voltage is set using a VCON • 500mA Maximum Load Capability (PWM and analog input and external resistor dividers for Bypass Mode) optimizing efficiency of the RF PA at various power • PWM / Forced Bypass Mode levels. • Low RDSON Bypass FET: 85mΩ (Typ.) The LM3203 offers 3 modes for mobile phones and • High Efficiency (96% typ. at 3.6VIN, 3.2VOUT at similar RF PA applications. Fixed-frequency PWM 150mA) mode minimizes RF interference. Bypass mode turns on an internal bypass switch to power the PA directly • Fast Turn-On Time When Enabled (50µs typ.), from the battery. Shutdown mode turns the device off 3GPP Compliant and reduces battery consumption to 0.1µA (typ.). • 10-Pin DSBGA Package The LM3203 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. APPLICATIONS • 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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