MIC2145BMM datasheet(3/15 Pages) MICREL

3 / 15 page

May 2003

MIC2145

Micrel

Electrical Characteristics (Note 6)

DD = 10V, VOUT = 10V, IOUT = 100mA; TJ =25°C, unless otherwise noted, bold values indicate –40°C ≤ TJ ≤ 125°C.

Parameter

Condition

Min

Typ

Max

Units

Supply Voltage

2.4

Shutdown Current

EN = 0.3V, V

DD = 10V, VFB=1.35V

0.5

µA

Quiescent Current

EN = V

DD, VDD = 10V, VFB = 1.35V

200

300

µA

Feedback Voltage Reference

(

±2%)

1.058

1.08

1.102

(

±3%)

1.048

1.112

Comparator Hysteresis

Feedback Input Current

FB=1.35V

Peak Current Limit

SET=200Ω, VDD = 3.6V, Note 4

0.8

SET=1kΩ, VDD = 10V, Note 4

0.9

Current Limit Comparator

500

Propagation Delay

Switch On-Resistance

SW = 150mA, VDD = 3.0V

500

750

Ω

SW = 1.2A, VDD = 10V

250

400

Ω

Maximum Off Time

1000

Enable Input Voltage

Logic Low (turn-off)

1.1

0.7

Logic High (turn-on)

1.5

1.1

Enable Input Current

EN = 0V

–1

0.01

µA

EN = 2V

–1

0.01

µA

Soft Start Current

EN = 2V, VDD=3.0V

–8

–12

–16

µA

Note 1.

Exceeding the absolute maximum rating may damage the device.

Note 2.

The device is not guaranteed to function outside its operating rating.

Note 3.

Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5K

Ω in series with 100pF.

Note 4.

The current is measured in a DC mode. Actual peak switching current will be higher due to internal propagation delay of the circuit.

Note 5.

EN ≤ VDD.

Note 6.

Specification for packaged product only.

Absolute Maximum Ratings (Note 1)

Supply Voltage (V

DD) .................................................... 18V

Switch Voltage (V

SW) .................................................... 18V

Feedback Voltage (V

FB) ................................................ 18V

Switch Current (I

SW) ........................................................ 2A

Enable Voltage(V

EN), Note 5 ........................................ 18V

RSET Voltage (V

RSET) .................................................... 6V

ESD Rating, Note 3 ...................................................... 2kV

Ambient Storage Temperature(T

S) .......... –65°C to +150°C

Operating Ratings (Note 2)

Supply Voltage (V

DD) ....................................... 2.4V to 16V

Switch Voltage (V

SW) .................................................... 16V

Ambient Temperature (T

A) ......................... –40°C to +85°C

Junction Temperature (T

J) ....................... –40°C to +125°C

Package Thermal Resistance MSOP

JA (MSOP-8) .................................................... 206°C/W

JA (3mm×3mm MLF-10) .................................... 60°C/W

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