Micrel, Inc.

MIC2811/2821

April 2008

4

M9999-042208-A

Absolute Maximum Ratings

(1)

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

(3)

Lead Temperature (Soldering, 10 sec.) ..................... 260°C

ESD Rating

Operating Ratings

(2)

Package Thermal Resistance

3mm x 3mm MLF-16 (

Electrical Characteristics

(5)

Parameter

Conditions

Min

Typ

Max

Units

UVLO Threshold

Rising input voltage during turn-on (DVIN & VIN Only)

2.45

2.55

2.65

V

UVLO Hysteresis

100

mV

Ground Pin Current

All 3 LDOs

800

55

40

120

1100

85

95

µA

µA

µA

µA

µA

Ground Pin Current in

Shutdown

All EN = 0V

0.2

5

µA

Over-temperature Shutdown

160

°C

Over-temperature Shutdown

Hysteresis

23

°C

Logic Low

0.2

V

Enable Input Voltage

Logic High

1.1

V

Enable Input Current

0.1

1

µA

Electrical Characteristics - DC/DC Converter

values indicate –40°C to + 125°C; unless noted.

Parameter

Conditions

Min

Typ

Max

Units

Output Voltage Accuracy

Fixed Output Voltages

-2

-3

+2

+3

%

%

Current Limit in PWM Mode

0.75

1.2

1.8

A

FB pin input current (ADJ only)

1

nA

Output Voltage Line Regulation

0.2

%/V

%/V

Output Voltage Load Regulation

0.2

1.5

%

Maximum Duty Cycle

100

%

Switch ON-Resistance

0.5

0.55

Ω

Ω

Oscillator Frequency

1.8

2

2.2

MHz

Turn-on Time

Turn-on Time (DC/DC)

83

350

µs