MIC2171 datasheet(3/24 Pages) MICROCHIP

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DS20006355A-page 3

MIC2171

1.0

ELECTRICAL CHARACTERISTICS

Absolute Maximum Ratings †

Supply Voltage (VIN) ...................................................................................................................................................40V

Switch Voltage (VSW)..................................................................................................................................................65V

Feedback Voltage (VFB) (transient, 1 ms).................................................................................................................±15V

Storage Temperature (TS)......................................................................................................................–65°C to +150°C

Lead Temperature (soldering 10 sec.) .................................................................................................................... 300°C

Operating Ratings ‡

Operating Ambient Temperature Range (TA)...........................................................................................–40°C to +85°C

Thermal Resistance

TO-220-5 (JA) ......................................................................................................................................................45°C/W

TO-263-5 (JA) ......................................................................................................................................................45°C/W

† Notice: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device.

This is a stress rating only and functional operation of the device at those or any other conditions above those indicated

in the operational sections of this specification is not intended. Exposure to maximum rating conditions for extended

periods may affect device reliability. Specifications are for packaged product only.

‡ Notice: The device is not guaranteed to function outside its operating ratings.

ELECTRICAL CHARACTERISTICS

Electrical Characteristics: VIN = 5V; TA = 25°C, unless otherwise specified. Bold values indicate –40°C ≤ TA ≤

85°C. Note 1, Note 2

Parameter

Symbol

Min.

Typ.

Max.

Units Conditions

Reference

Feedback Voltage

VFB

1.220 1.240 1.264

VCOMP = 1.24V

1.214

—

1.274

Feedback Voltage Line

Regulation

∆VFB(LINE)

—

0.6

—

%/V

3V ≤ VIN ≤ 40V, VCOMP = 1.24V

Feedback Bias Current

IFB

—

310

750

VFB = 1.24V

—

1100

Error Amplifier

Transconductance

3.0

3.9

6.0

µA/mV ∆ICOMP = ±25 µA

2.4

—

7.0

Voltage Gain

400

800

2000

V/V

0.9V ≤ VCOMP ≤ 1.4V

Output Current

ICOMP

125

175

350

µA

VCOMP = 1.5V

100

—

400

Output Swing

VCOMP(MAX)

1.8

2.1

2.3

High Clamp, VFB = 1V

VCOMP(MIN)

0.25

0.35

0.52

Low Clamp, VFB = 1.5V

Compensation Pin Threshold

VCOMP_TH

0.8

0.9

1.08

Duty Cycle = 0

0.6

—

1.25

Output Switch

ON Resistance

RSW(ON)

—

0.37

0.5

ISW = 2A, VFB = 0.8V

—

0.55

Current Limit

ICLIM

2.5

3.6

5.0

Duty Cycle = 50%, TJ ≥ 25°C

2.5

4.0

5.5

Duty Cycle = 50%, TJ < 25°C

2.5

3.0

5.0

Duty Cycle = 80%, Note 3

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