MIC4680 datasheet(4/24 Pages) MICROCHIP

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MIC4680

DS20006623A-page 4



2021 Microchip Technology Inc. and its subsidiaries

Test Circuit

FIGURE 1-1:

Current Limit Test Circuit.

Quiescent Current

—

VFB = 4.0V

MIC4680-5.0

Output Voltage

VOUT

4.950

5.0

5.05

±1%

4.85

—

5.15

±3%

4.800

5.0

5.200

8V ≤ VIN ≤ 34V, 0.1A ≤ ILOAD ≤ 1A

4.750

—

5.250

Maximum Duty Cycle

DCMAX

—

VFB = 4.0V

Output Leakage Current

IOZ

—

500

µA

VIN = 34V, VSHDN = 5V, VSW = 0V

—

VIN = 34V, VSHDN = 5V, VSW = –1V

Quiescent Current

—

VFB = 6.0V

MIC4680-3.3 and MIC4680-5.0

Frequency Fold Back

—

100

kHz

—

Oscillator Frequency

fOSC

180

200

220

kHz

—

Saturation Voltage

VSAT

—

1.4

1.8

IOUT = 1A

Short-Circuit Current Limit

ISC

1.3

1.8

2.5

VFB = 0V, see Figure 1-1

Standby Quiescent Current

ISTBY

—

1.5

—

µA

VSHDN = VIN

—

100

µA

VSHDN = 5V (regulator off)

Shutdown Input Logic Level

VSHDN

1.6

—

Regulator off

—

1.0

0.8

Regulator on

Shutdown Input Current

ISHDN

–10

–0.5

µA

VSHDN = 5V (regulator off)

–10

–1.5

VSHDN = 0V (regulator on)

Thermal Shutdown

TSHDN

—

160

—

°C

—

ELECTRICAL CHARACTERISTICS (CONTINUED)

Electrical Characteristics: VIN = 12V; ILOAD = 500 mA; TJ = +25°C, bold values valid for –40°C to +125°C, unless

noted. (Note 1)

Parameter

Symbol

Min.

Typ.

Max.

Units

Conditions

Note 1: Test at TA = +85°C, ensured by design, and characterized to TJ = +125°C.

68μH

GND

SHDN

Device Under Test

+12V

SHUTDOWN

ENABLE

SOIC-8

5–8

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