Micrel

MIC2159

October 2006

3

M9999-101206

Absolute Maximum Rating

(1)

Junction Temperature Range..............–40

Ambient Storage Temp .............................–65

°C to +150°C

Operating Ratings

(2)

Supply Voltage.............................................. +3V to +14.5V

Package Thermal Resistance

Electrical Characteristics

Tj = 25ºC, bold values indicate -40ºC<Tj<+125ºC; Vin = 5V; unless otherwise specified

Parameter

Condition

Min

Typ

Max

Units

Regulation

Feedback Voltage

Reference

(+/- 1%)

0.792

0.8

0.808

V

Feedback Voltage

Reference

(+/- 2% over temp)

0.784

0.8

0.816

V

Feedback Bias Current

150

350

nA

Output Voltage Line

Regulation

0.03

% / V

Output Voltage Load

Regulation

0.5

%

Output Voltage Total

Regulation

3V

≤ VIN ≤ 14.5V; 1A ≤ IOUT ≤ 10A

(VOUT = 2.5V) Note 3

0.6

1.5

%

Oscillator Section

Oscillator Frequency

350

400

450

kHz

Maximum Duty Cycle

92

%

Minimum On-Time

Note 3

30

60

ns

Input and VDD Supply

PWM mode supply

current

(output switching but excluding external MOSFET gate

current.)

1.6

3

mA

Shutdown Quiescent

Current (MSOP-10)

50

150

µA

Threshold (MSOP-10)

0.1

0.25

0.35

V

Blanking Period (MSOP-

10)

1

4

8

ms

Digital Supply Voltage

4.7

5

5.3

V

Error Amplifier

DC Gain

70

dB

Transconductance

1.4

mS

Soft Start

Soft Start Current

After time out of internal timer

-13

9

-4

µA

Current Sense

Current Sense Over

Current Trip Point

135

200

275

µA