 2015 Microchip Technology Inc.

DS20005424B-page 3

UCS2112

1.0

ELECTRICAL

CHARACTERISTICS

Absolute Maximum Ratings †

Port Power Switch Current ..................................................................................................................... Internally limited

Current on any Other Pin ..................................................................................................................................... ±10 mA

Package Power Dissipation ........................................................................................................................ See Table 1-1

Operating Ambient Temperature Range.................................................................................................-40°C to +105°C

Storage Temperature Range ..................................................................................................................-55°C to +150°C

† 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 in the

operation listings of this specification is not implied. Exposure to maximum rating conditions for extended periods may

affect device reliability.

TABLE 1-1:

POWER DISSIPATION SUMMARY

Board

Package



JC



JA

De-Rating Factor

Above +25°C

Power Rating

Power Rating

Power Rating

High K

(Note)

20-pin QFN

4x4 mm

6 °C/W

41 °C/W

24.4 mW/°C

2193 mW

1095 mW

729 mW

Low K

(Note)

20-pin QFN

4x4 mm

6 °C/W

60 °C/W

16.67 mW/°C

1498 mW

748 mW

498 mW

Note:

A High K board uses a thermal via design with the thermal landing soldered to the PCB ground plane with

0.3 mm (12 mil) diameter vias in a 3x3 matrix (9 total) at 0.5 mm (20 mil) pitch. The board is multi-layer with

1-ounce internal power and ground planes and 2-ounce copper traces on top and bottom. A Low K board

is a two layer board without thermal via design with 2-ounce copper traces on the top and bottom.

TABLE 1-2:

ELECTRICAL SPECIFICATIONS

Electrical Characteristics:

Characteristic

Symbol

Min.

Typ.

Max.

Unit

Conditions

Power and Interrupts - DC

Supply Voltage

4.5

5

5.5

V

Supply Current in Active

—

850

—

µA

Supply Current in Sleep

—

6

20

µA

Supply Current in Detect

—

200

—

µA

Average current

No portable device attached

(Note 1)

Power-on Reset

—4

—

V

—

500

—

mV

Note

1:

This parameter is characterized, not 100% tested.

2:

This parameter is ensured by design and not 100% tested.

3:

The current measurement full scale range maximum value is 3.4A. However, the UCS2112 cannot report values above

4:

This parameter is characterized, not 100% production tested.