LM3203TL datasheet(1/15 Pages) NSC

Teilenummer	LM3203TL

Bauteilbeschribung	Step-Down DC-DC Converter with Bypass Mode for CDMA / WCDMA RF Power Amplifiers

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Hersteller	NSC [National Semiconductor (TI)]

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LM3203

Step-Down DC-DC Converter with Bypass Mode for

CDMA / WCDMA RF Power Amplifiers

General 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 V

CON analog input and external resistor dividers for

optimizing efficiency of the RF PA at various power levels.

The LM3203 offers 3 modes for mobile phones and similar

RF PA applications. Fixed-frequency PWM mode minimizes

RF interference. Bypass mode turns on an internal bypass

switch to power the PA directly from the battery. Shutdown

mode turns the device off and reduces battery consumption

to 0.1µA (typ.).

The LM3203 is available in a 10-pin lead free micro SMD

package. A high switching frequency (2MHz) allows use of

tiny surface-mount components.

Features

n

2MHz (typ.) PWM Switching Frequency

n

Operates from a single Li-Ion cell (2.7V to 5.5V)

n

Adjustable Output Voltage (0.8V to 3.6V)

n

500mA Maximum load capability (PWM and Bypass

mode)

n

PWM / Forced Bypass Mode

n

Low R

DSON Bypass FET: 85m

Ω (typ.)

n

High Efficiency (96% typ. at 3.6V

IN, 3.2VOUT at 150mA)

n

Fast Turn-on time when Enabled (50µs typ.), 3GPP

Compliant

n

10-pin micro SMD Package

n

Current Overload Protection

n

Thermal Overload Protection

Applications

n

Cellular Phones

n

Hand-Held Radios

n

RF PC Cards

n

Battery Powered RF Devices

Typical Application

20141601

July 2005

DS201416

www.national.com

Ähnliche Beschreibung - LM3203TL

Hersteller	Teilenummer	Datenblatt	Bauteilbeschribung
Texas Instruments	LM3203	3Mb / 23P	[Old version datasheet] Step-Down DC-DC Converter with Bypass Mode for CDMA / WCDMA RF Power Amplifiers
Texas Instruments	LM3203	3Mb / 22P	[Old version datasheet] LM3203 Step-Down DC-DC Converter with Bypass Mode for CDMA / WCDMA RF Power Amplifiers
National Semiconductor ...	LM3200	882Kb / 15P	Miniature, Adjustable, Step-Down DC-DC Converter with Bypass Mode for RF Power Amplifiers
Texas Instruments	LM3204	959Kb / 25P	[Old version datasheet] Miniature, Adjustable, Step-Down DC-DC Converter with Bypass Mode for RF Power Amplifiers
Texas Instruments	LM3212	942Kb / 25P	[Old version datasheet] LM3212 Step-Down DC-DC Converter with Analog Bypass Mode for RF Power Amplifiers
National Semiconductor ...	LM3200	885Kb / 15P	Miniature, Adjustable, Step-Down DC-DC Converter with Bypass Mode for RF Power Amplifiers
National Semiconductor ...	LM3204	878Kb / 16P	Miniature, Adjustable, Step-Down DC-DC Converter with Bypass Mode for RF Power Amplifiers
Texas Instruments	LM3204	903Kb / 24P	[Old version datasheet] LM3204 Miniature, Adjustable, Step-Down DC-DC Converter with Bypass Mode for RF Power Amplifiers
Texas Instruments	LM3200	937Kb / 24P	[Old version datasheet] LM3200 Miniature, Adjustable, Step-Down DC-DC Converter with Bypass Mode for RF Power Amplifiers
National Semiconductor ...	LM2706	451Kb / 15P	Miniature, Variable, Step-Down DC-DC Converter with Bypass for RF Power Amplifiers

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