MIC23451 datasheet(3/28 Pages) MICROCHIP

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DS20006662A-page 3

MIC23451

1.0

ELECTRICAL CHARACTERISTICS

Absolute Maximum Ratings †

Supply Voltage (PVIN, AVIN)......................................................................................................................... –0.3V to +6V

Sense (VSNS1, VSNS2, VSNS3)...................................................................................................................... –0.3V to +6V

Power Good (PG1, PG2, PG3) .................................................................................................................... –0.3V to +6V

Output Switch Voltage (VSW1, VSW2, VSW3) ................................................................................................ –0.3V to +6V

Enable Input Voltage (VEN1, VEN2, VEN3).......................................................................................................–0.3V to VIN

ESD Rating .............................................................................................................................................................Note 1

Operating Ratings ‡

Supply Voltage (VIN) ................................................................................................................................. +2.7V to +5.5V

Enable Input Voltage (VEN1, VEN2, VEN3)............................................................................................................0V to VIN

Output Voltage Range (VSNS1, VSNS2, VSNS3)............................................................................................. +1V to +3.3V

† 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.

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

Note 1: Devices are ESD sensitive; use proper handling precautions. Human body model, 1.5 kΩ in series with

100 pF.

ELECTRICAL CHARACTERISTICS

Electrical Characteristics: TA = +25°C; VIN = VEN1 = VEN2 = VEN3 = 3.6V; L1 = L2 = L3 = 1 µH; COUT1 = COUT2 =

COUT3 = 4.7 µF, unless otherwise specified. Bold values valid for –40°C ≤ TJ ≤ +125°C, unless noted. (Note 1)

Parameter

Symbol

Min.

Typ.

Max.

Units

Conditions

Supply Voltage Range

VIN

2.7

—

5.5

—

Undervoltage Lockout

Threshold

UVLOTH 2.45

2.55

2.65

Turn-On

Undervoltage Lockout

Hysteresis

UVLOHYS

—

Quiescent Current

—

120

µA

IOUT = 0 mA,

VSNS > 1.2 x VOUT(NOM)

Per Channel Shutdown Current

ISHDN

—

0.1

µA

VEN1, VEN2, VEN3 = 0V;

VIN = 5.5V

Output Voltage Accuracy

—

–2.5

—

+2.5

VIN = 3.6V if VOUT(NOM) < 2.5V,

ILOAD = 20 mA

–2.5

—

+2.5

VIN = 4.5V if VOUT(NOM) ≥ 2.5V,

ILOAD = 20 mA

Feedback Voltage

VFBx

0.604

0.62

0.635

—

Peak Current Limit

ILIM(PK)

2.2

4.1

—

SNS1, SNS2, SNS3 = 0.9 x

VOUT(NOM)

Foldback Current Limit

ILIM

—

2.3

—

Output Voltage Line Regulation

(VOUT1, VOUT2, VOUT3)

—

0.3

—

%/V

VIN = 3.6V to 5.5V if VOUT(NOM)1,2,3

< 2.5V, ILOAD = 20 mA

—

0.3

—

VIN = 4.5V to 5.5V if VOUT(NOM)1,2,3

≥ 2.5V, ILOAD = 20 mA

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