AIC1577 Ver la hoja de datos (PDF) - Analog Intergrations

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AIC1577

External NMOS Step-Down PWM Controller

Analog Intergrations 

AIC1577

ABSOLUTE MAXIMUM RATINGS

Supply Voltage (VIN)

Drive Supply Voltage (BOOST)

Switch Voltage (SW)

Differential Boost Voltage (BOOST to SW )

ITH/RUN,VFB Voltages

Peak Drive Output Current < 10µS (DRI )

Operating Temperature Range

Junction Temperatrue

Storage Temperature Range

Lead Temperature (Soldering. 10 sec)

Thernal Resistance (θJA) (Assume No Ambient Airflow, No Heatsink)

DIP8

SOP8

MSOP8

25V

32V

25V

8V

7V

2A

-40°C ~ 85°C

125°C

-65°C ~ 150°C

260°C

100°C/W

160°C/W

180°C/W

Absolute Maximum Ratings are those values beyond which the life of a device may be

Impaired.

TEST CIRCUIT

Refer to Typical Application Circuit.

ELECTRICAL CHARACTERISTICS (TA=25°C, VIN=15V, unless otherwise noted.) (note1)

PARAMETER

TEST CONDITIONS

Input Voltage

Input Supply Current

Normal Mode (Note 2)

Shutdown Mode, VITH/RUN=0V

Feedback Voltage

∆Output Overvoltage Lockout VFB connect to Vout, ∆VOVL=VOVL-VFB

Reference Voltage Line

Regulation

VIN= 4.5V to 20 V

Output Voltage Load Regula-

tion

ITH Sinking 5µA

ITH Sourcing 5µA

Run Threshold

Maximum Current Sense

Threshold

VFB=0.72V

Oscillator Frequency

MIN.

4.5

0.788

20

0.6

125

450

TYP.

720

16

0.8

55

0.002

0.7

-0.4

0.8

150

500

MAX. UNIT

24

V

900 µA

20

µA

0.812 V

90 mV

0.015 %/V

1.1

%

-0.8

0.9

V

175 mV

550 KHz

3

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