© 2011 Microchip Technology Inc.

DS22285A-page 3

MCP16321/2

1.0

ELECTRICAL

CHARACTERISTICS

Absolute Maximum Ratings†

SW ...................................................................... -1V to 26.4V

Continuous Total Power Dissipation .......................................

...................................................See Thermal Characteristics

Storage Temperature ....................................-65°C to +150°C

Operating Junction Temperature...................-40°C to +125°C

ESD Protection On All Pins:

HBM ......................................................................... 3 kV

MM ..........................................................................200V

† 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.

DC CHARACTERISTICS

Electrical Characteristics:

Parameters

Sym

Min

Typ

Max

Units

Conditions

Input Voltage

6.0

—

24

V

Quiescent Current

(Switching)

—5.2

—

mA

Quiescent Current

(Non-Switching)

—

2.3

—

mA

Closed Loop in

Overvoltage

Quiescent Current -

Shutdown

—5

10

µA

EN = 0

Undervoltage Lockout Start

5.5

5.75

6.0

Undervoltage Lockout

Hysteresis

—

0.65

—

V

Non-Switching

Output Characteristics

Maximum Output Current

MCP16321

1

——

A

Maximum Output Current

MCP16322

2

——

A

Output Voltage Adjust Range

0.9

—

5.0

V

Output Voltage Tolerance

in PWM Mode

Output Voltage Tolerance

in PFM Mode

Feedback Voltage

0.886

0.9

0.914

V

Feedback Reference

Tolerance

-1.5

—

1.5

%

PFM Mode Feedback

Comparator Threshold

—

V

Feedback Input Bias

Current

—100

—

nA

Note 1:

Regulator SW pin is forced off for 240 ns every 8 cycles to ensure the BOOST cap is replenished.