AIC1880 Просмотр технического описания (PDF) - Analog Intergrations

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AIC1880

Low Noise, Step-Up PWM DC/DC Converter

Analog Intergrations 

AIC1880

ELECTRICAL CHARACTERISTICS

(TA=25°C, VIN= SHDN =3V, FREQ=GND, unless otherwise specified) (Note 1)

PARAMETER

TEST CONDITION

SYMBOL MIN TYP MAX

UNIT

Input Voltage Range

Under Voltage Lock Out

Quiescent Current

Shutdown Current

SOFT-START

VIN

2.6

5.5

V

UVLO 2.20 2.35 2.50

V

VFB=1.3V, not switching

IIN

0.18 0.35

mA

VFB=1V, switching

IIN

2

5

mA

SHDN =GND

IIN

0.1

1

µA

Soft-start current

SWITCHING REGULATOR OSCILLATOR

Frequency

Maximum Duty Cycle

Minimum Duty Cycle

ERROR AMPLIFIER

Feedback Voltage

FB Input Bias Current

FB Voltage Line Regulation

Transconductance

N-CHANNEL SWITCH

Current Limit

Internal Switch On-Resistance

Leakage Current

CONTROL INPUTS

FREQ=GND

FREQ=VIN

FREQ=GND

FREQ=VIN

FREQ=GND

FREQ=VIN

Level to produce VCOMP=1.24V

VFB=1.24V

Level to produce VCOMP=1.24V

2.6V < VIN < 5.5V

ΔI=5µA

ILX=1.2A

VLX=12V

ISS

FOSC

FOSC

DC

DC

DC

DC

VFB

IFB

GM

ILIM

RON

ILXOFF

1.5

4

7

540

1000

640

1220

85

740

1500

85

16

30

1.222 1.24 1.258

0

40

0.05 0.3

210

1.6

0.3 0.5

0.01 20

µA

kHz

kHz

%

%

%

%

V

nA

%/V

µmhos

A

Ω

µA

Input Low Voltage

Input High Voltage

Hysteresis

FREQ Pull-Down Current

SHDN Input Current

SHDN , FREQ

VIN=2.6V to 5.5V

SHDN , FREQ

VIN=2.6V to 5.5V

SHDN , FREQ

VIL

0.3VIN

V

VIH

0.7VIN

V

0.1 VIN

V

IFREQ

1.8

5

9

µA

I SHDN

0.1

1

µA

3

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