LM3204TLX/NOPB ,Miniature, Adjustable, Step-Down DC-DC Converter with Bypass Mode for RF Power Amplifiers 10-DSBGA -30 to 85ELECTRICAL CHARACTERISTICSLimits in standard typeface are for T = T = 25°C. Limits in boldface type ..
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LM3204TLX/NOPB
Miniature, Adjustable, Step-Down DC-DC Converter with Bypass Mode for RF Power Amplifiers
BYP FB
VDD
VCON
VIN
2.7V to 5.5V4.7 PF
SGNDPGND
LM3204BYPOUT
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
Checkfor Samples: LM3204
1FEATURES DESCRIPTIONThe LM3204isa DC-DC converter optimized for
2MHz (typ.) PWM Switching Frequency powering RF power amplifiers (PAs) froma single
• Operates froma Single Li-Ion Cell (2.7Vto Lithium-Ion cell.It steps down an input voltageof
5.5V) 2.7Vto 5.5Vto an adjustable output voltageof 0.8V
Adjustable Output Voltage (0.8Vto 3.6V) to 3.6V. The output voltageis set using an analog
input( VCON) for optimizing efficiencyof the RF PAat
• Fast Turn On Time When Enabled (50µs Typ.), various power levels.
3GPP CompliantThe 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, 3.2VOUTat bypass modes. Shutdown mode turns the device off
120mA) and reduces battery consumptionto 0.1µA (typ.).
• 10-pin DSBGA PackageThe LM3204is availableina 10-pin lead free DSBGA
• Current Overload Protection package.A high switching frequency (2MHz) allows
• Thermal Overload Protection useof 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
