MIC2102 datasheet(5/36 Pages) MICREL

5 / 36 page

Micrel, Inc.

MIC2101/02

November 13, 2013

Revision 2.0

Electrical Characteristics(4) (Continued)

VIN = 12V, VOUT = 1.2V; VBST –VSW = 5V; TA = 25°C, unless noted. Bold values indicate

Parameter

Condition

Min.

Typ.

Max.

Units

Oscillator

Switching Frequency

VFREQ = VIN

400

600

750

kHz

VFREQ = 50%VIN

300

Maximum Duty Cycle

Minimum Duty Cycle

VFB > 0.8V

Minimum Off-Time

140

200

260

Soft-Start

Soft-Start time

5ms

Short-Circuit Protection

Current-Limit Threshold

VFB = 0.79V

0mV

Short-Circuit Threshold

VFB = 0V

9mV

Current-Limit Source Current

VFB = 0.79V

100

μA

Short-Circuit Source Current

VFB = 0V

μA

FET Drivers

DH, DL Output Low Voltage

ISINK = 10mA

0.1

DH, DL Output High Voltage

ISOURCE = 10mA

VPVDD 0.1V

VBST 0.1V

DH On-Resistance, High State

2.1

3.3

DH On-Resistance, Low State

1.8

3.3

DL On-Resistance, High State

1.8

3.3

DL On-Resistance, Low State

1.2

2.3

SW, BST Leakage Current

μA

Power Good (PG)

PG Threshold Voltage

Sweep VFB from Low to High

%VOUT

PG Hysteresis

Sweep VFB from High to Low

%VOUT

PG Delay Time

Sweep VFB from Low to High

100

μs

PG Low Voltage

VFB < 90% x VNOM, IPG = 1mA

200

Thermal Protection

Over-Temperature Shutdown

TJ Rising

160

°C

Over-Temperature Shutdown Hysteresis

°C

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