MAX4473ESA datasheet(3/9 Pages) MAXIM

3 / 9 page

Low-Cost, Low-Voltage, PA Power Control

Amplifier for GSM Applications

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ELECTRICAL CHARACTERISTICS (continued)

(VCC = 2.7V to 6.5V, SHDN > 2.4V, MAX4473 test circuit, RG1 = RG2 = 1kΩ ±1%, RG3 = 2.5kΩ ±1%, RSENSE = 100Ω ±1%,

RL = 10kΩ, CL = 300pF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = 6.0V, VPC = 1.0V, TA = +25°C.) (Note 1)

Note 1: Limits over temperature are guaranteed by design.

Note 2: No output phase-reversal for input common-mode voltage range from GND to VCC. Common-mode range limited by voltage

drop across Q1 and RG3.

Note 3: Guaranteed by design.

Note 4: Error dependent on tolerance of RG1, RG2, and RG3. Specified with 0.1% tolerance resistors.

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

RL = 10

Ω to VCC / 2

0.15

VCC -

0.15

Output Voltage Swing

RL = 500

Ω to VCC / 2

0.5

VCC -

0.5

Output Current Limit

VOUT = VCC / 2

Gain-Bandwidth Product

RL = 10

Ω, CL = 300pF, fo = 10kHz

MHz

Phase Margin

RL = 10

Ω, CL = 300pF

degrees

Slew Rate

Measured from 30% to 70% of VOUT,

RL = 10

Ω, CL = 300pF

1.8

V/µs

Capacitive-Load Stability

No sustained oscillations (Note 3)

300

Enable/Disable Time

From 50% of SHDN edge to VOUT = 1V, VPC = 2V

0.9

1.5

µs

GAIN CONTROL BUFFER AND V-TO-I CONVERTER

PC Input Bias Current

GND < VPC < VCC - 0.15V

±0.04

±1

µA

SR3 Output Current Limit

VPC < 2.55V, SR1 = SR2 = VCC

0.750

VPC to VRG1 Ratio

Measure voltage across RG1,

0.3V < VPC < 2.55V (Note 4)

0.095

0.1

0.105

V/V

PC Input Bandwidth

Bandwidth from VPC to VRG1

MHz

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