AAT1171 データシートの表示（PDF） - Analog Technology Inc

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AAT1171

600mA Voltage-Scaling Step-Down Converter for RF Power Amplifiers with Bypass Switch

Analog Technology Inc 

AAT1171

600mA Voltage-Scaling Step-Down Converter

for RF Power Amplifiers with Bypass Switch

Typical Characteristics

DAC to Bypass Transient Response

(LL Mode; VIN = 4.2V; RL = 10Ω; COUT = 4.7µF; L = 2.2µH)

VOUT

1V/div

0

VDAC

0.5V/div

0

4.2V

0.6V

1.3V

0.2V

Time (25µs/div)

VOUT

1V/div

0V

Enable

2V/div

0V

IIN

200mA/div

0A

Enable Soft Start

(VIN = 3.6V; VOUT = 1.8V; RL = 3.9Ω;

COUT = 4.7µF; L = 2.2µH)

1.8V

Time (20µs/div)

Load Transient Response

(VIN = 4.2V; VOUT = 3.3V; COUT = 4.7µF; L = 2.2µH)

VOUT

(AC coupled)

20mV/div

3.51V

3.26V

IOUT

200mA/div

525mA

250mA

Time (20µs/div)

Load Transient Response

(VIN = 3.6V; VOUT = 1.8V; COUT = 4.7µF; L = 2.2µH)

VOUT

(AC coupled)

20mV/div

1.914V

500mA

1.798V

IOUT

100mA/div

200mA

Time (20µs/div)

Line Transient Response

(VOUT = 1.5V; RL = 10Ω; COUT = 4.7µF; L = 2.2µH)

VIN

0.5V/div

3.6V

3.0V

VOUT

(AC coupled)

50mV/div

1.56V

1.44V

Time (50µs/div)

1171.2007.08.1.1

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