MIC2176-1YMM datasheet(4/31 Pages) MICREL

4 / 31 page

Micrel, Inc.

MIC2176

November 2010

M9999-111710-A

Absolute Maximum Ratings

(1, 2)

VHSD to PGND................................................ −0.3V to +76V

VDD to PGND ................................................... −0.3V to +6V

VSW to PGND......................................−0.3V to (VHSD +0.3V)

VBST to VSW ........................................................ −0.3V to 6V

VBST to PGND .................................................. −0.3V to 82V

VEN to PGND ......................................−0.3V to (VDD + 0.3V)

VFB to PGND.......................................−0.3V to (VDD + 0.3V)

PGND to GND..............................................

−0.3V to +0.3V

Junction Temperature .............................................. +150°C

Storage Temperature (TS).........................−65°C to +150°C

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

Operating Ratings

(3)

Supply Voltage (VHSD) ....................................... 4.5V to 75V

Bias Voltage (VDD)............................................ 4.5V to 5.5V

Enable Input (VEN)................................................. 0V to VDD

Junction Temperature (TJ) ........................ −40°C to +125°C

Junction Thermal Resistance

MSOP (

θJA) ..................................................130.5°C/W

Continuous Power Dissipation

(derate 5.6mW/°C above 70°C)

(TA = 70°C) ........................................................421mW

ESD (Human Body Mode) .......................................... 1.5kV

Electrical Characteristics

(4)

VIN = VHSD = 48V, VDD = 5V; VBST – VSW = 5V; TA = 25°C, unless noted. Bold values indicate −40°C ≤ TJ ≤ +125°C.

Parameter

Condition

Min.

Typ.

Max.

Units

Power Supply Input

HSD Voltage Range (VHSD)

(5)

4.5

VDD Bias Voltage

Operating Bias Voltage (VDD)

4.5

5.5

Undervoltage Lockout Trip Level

VDD Rising

3.2

3.85

4.45

UVLO Hysteresis

370

Quiescent Supply Current

VFB = 1.5V

1.4

Shutdown Supply Current

SW = unconnected, VEN = 0V

0.7

Reference

0°C ≤ TJ ≤ 85°C (±1.0%)

0.792

0.8

0.808

Feedback Reference Voltage

-40°C ≤ TJ ≤ 125°C (±1.5%)

0.788

0.8

0.812

FB Bias Current

VFB = 0.8V

500

Enable Control

EN Logic Level High

4.5V < VDD < 5.5V

1.2

0.85

EN Logic Level Low

4.5V < VDD < 5.5V

0.78

0.4

EN Bias Current

VEN = 0V

100

µA

Oscillator

MIC2176-1

100

125

MIC2176-2

150

200

250

Switching Frequency

(6)

MIC2176-3

225

300

375

kHz

MIC2176-1, VFB = 0V, HSD=4V, VO = 3.3V

MIC2176-2, VFB = 0V, HSD=4V, VO = 3.3V

Maximum Duty Cycle

(7)

MIC2176-3, VFB = 0V, HSD=4V, VO = 3.3V

Minimum Duty Cycle

VFB > 0.8V

Minimum Off-Time

360

Minimum On-Time

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