MCP16331 datasheet(3/40 Pages) MICROCHIP

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DS20005308B-page 3

MCP16331

1.0

ELECTRICAL

CHARACTERISTICS

Absolute Maximum Ratings †

VIN, SW ............................................................... -0.5V to 54V

BOOST – GND ................................................... -0.5V to 60V

BOOST – SW Voltage........................................ -0.5V to 6.0V

VFB Voltage ........................................................ -0.5V to 6.0V

EN Voltage ............................................. -0.5V to (VIN + 0.3V)

Output Short Circuit Current ................................. Continuous

Power Dissipation ....................................... Internally Limited

Storage Temperature ................................... -65oC to +150oC

Ambient Temperature with Power Applied ... -40oC to +125oC

Operating Junction Temperature.................. -40oC to +160oC

ESD Protection on All Pins:

HBM..................................................................... 4 kV

MM ......................................................................300V

† Notice:

Stresses above those listed under “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

the

operational

sections

this

specification is not intended. Exposure to maximum

rating conditions for extended periods may affect

device reliability.

DC CHARACTERISTICS

Electrical Characteristics:

Unless otherwise indicated, TA = +25°C, VIN = VEN = 12V, VBOOST - VSW = 3.3V, 

VOUT = 3.3V, IOUT = 100 mA, L = 15 µH, COUT = CIN = 2 X 10 µF X7R Ceramic Capacitors

Boldface

specifications apply over the TA range of -40°C to +125°C.

Parameters

Sym.

Min.

Typ.

Max.

Units

Conditions

Input Voltage

VIN

4.4

—

Note 1

Feedback Voltage

VFB

0.784

0.800

0.816

Output Voltage Adjust Range

VOUT

2.0

—

Note 1, Note 3

Feedback Voltage



Line Regulation

VFB/VFB)/VIN|

—

0.002

0.1

%/V

VIN = 5V to 50V

Feedback Voltage



Load Regulation

VFB/VFB|

—

0.13

0.35

IOUT= 50 mA to

500 mA

Feedback Input Bias Current

IFB

—

+/- 3

—

Undervoltage Lockout Start

UVLOSTRT

—

4.1

4.4

VIN Rising

Undervoltage Lockout Stop

UVLOSTOP

3.6

—

VIN Falling

Undervoltage Lockout



Hysteresis

UVLOHYS

—

0.5

—

Switching Frequency

fSW

425

500

550

kHz

Maximum Duty Cycle

DCMAX

—

VIN = 5V; VFB = 0.7V;

IOUT = 100 mA

Minimum Duty Cycle

DCMIN

—

Note 4

NMOS Switch On Resistance

RDS(ON)

—

0.6

—



VBOOST - VSW = 5V,

Note 3

NMOS Switch Current Limit

IN(MAX)

—

1.3

—

VBOOST - VSW = 5V,

Note 3

Quiescent Current

—

1.7

VIN = 12V; Note 2

Quiescent Current - Shutdown

—

A

VOUT = EN = 0V

Output Current

IOUT

500

—

Note 1; see Figure 2-9

EN Input Logic High

VIH

1.9

—

Note

The input voltage should be > output voltage + headroom voltage; higher load currents increase the input voltage

necessary for regulation. See characterization graphs for typical input to output operating voltage range.

VBOOST supply is derived from VOUT.

Determined by characterization, not production tested.

This is ensured by design.

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