Datasheet Texas Instruments LM3203TL/NOPB — 数据表

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 FEATURES DESCRIPTION The LM3203 is a DC-DC converter optimized for
powering RF power amplifiers (PAs) from a single
Lithium-Ion cell. However, they may be used in many
other applications. It steps down an input voltage of
2.7V to 5.5V to an adjustable output voltage of 0.8V
to 3.6V. The output voltage is set using a VCON
analog input and external resistor dividers for
optimizing efficiency of the RF PA at various power
levels. 1 2 2MHz (Typ.) PWM Switching Frequency
Operates from a Single Li-Ion Cell (2.7V to
5.5V)
Adjustable Output Voltage (0.8V to 3.6V)
500mA Maximum Load Capability (PWM and
Bypass Mode)
PWM / Forced Bypass Mode
Low RDSON Bypass FET: 85mΩ (Typ.)
High Efficiency (96% typ. at 3.6VIN, 3.2VOUT at
150mA)
Fast Turn-On Time When Enabled (50Вµs typ.),
3GPP Compliant …