MIC2183 datasheet(4/12 Pages) MICREL

4 / 12 page

MIC2183

Micrel

MIC2183

December 10, 2001

Electrical Characteristics

INA = VINP = VCSH = 5V, VOUT = 3.3V, VEN/UVLO = 5V, VFREQ/2 = 0V, TJ = 25ºC, unless otherwise specified. Bold values indicate

–40ºC < T

J < +125ºC.

Parameter

Condition

Min

Typ

Max

Units

Regulation

Feedback Voltage Reference

(

±1%)

1.233

1.245

1.257

(

±2%)

1.22

1.27

Feedback Bias Current

Output Voltage Line Regulation

≤ V

IN ≤ 12V

0.04

% / V

Output Voltage Load Regulation

0mV < (V

CSH – VCSL) < 75mV

0.9

Output Voltage Total Regulation

≤ V

INA ≤ 12V, 0mV < (VCSH – VCSL) < 75mV (±3%)

1.208

1.282

Input & V

DD Supply

INA Input Current

0.7

INP Input Current, Note 4

(Excluding external MOSFET gate current)

1.0

Shutdown Quiescent Current

EN/UVLO = 0V; (IVINA + IVINP)

0.5

µA

Digital Supply Voltage (V

DD)IL = 0

2.82

3.0

3.18

Digital Supply load regulation

L = 0 to 1mA

0.03

Undervoltage Lockout

DD upper threshold (turn on threshold)

2.75

UVLO Hysteresis

100

Enable/UVLO

Enable Input Threshold

0.6

0.9

1.2

UVLO Threshold

(turn-on threshold)

1.4

1.5

1.6

UVLO Hysteresis

140

Enable Input Current

EN/UVLO = 5V

0.2

µA

Soft Start

Soft Start Current

µA

Current Limit

Current Limit Threshold Voltage

Voltage on CSH-CSL to trip current limit

100

Error Amplifier

Error Amplifier Gain

V/V

Current Amplifier

Current Amplifier Gain

3.0

V/V

Absolute Maximum Ratings (Note 1)

Supply Voltage (V

INA, VINP) ......................................... 15V

Digital Supply Voltage (V

DD) ........................................... 7V

Comp Pin Voltage (V

COMP) ............................ –0.3V to +3V

Feedback Pin Voltage (V

FB) .......................... –0.3V to +3V

Enable Pin Voltage (V

EN/UVLO) ..................... –0.3V to 15V

Current Sense Voltage (V

CSH–VCSL) ............... –0.3V to 1V

Sync Pin Voltage (V

SYNC) ................................ –0.3V to 7V

Freq/2 Pin Voltage (V

FREQ/2) ............................ -0.3V to 7V

Power Dissipation (P

16 lead SOIC ................................. 400mW @ T

A = 85°C

16 lead QSOP ....................................... 245mW @ 85

°C

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

°C to +150°C

ESD Rating, Note 3

Operating Ratings (Note 2)

Supply Voltage (V

INA, VINP) ........................ +2.9V to +14V

Ambient Operating Temperature ......... –40

°C ≤ T

A ≤ +85°C

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

°C ≤ T

J ≤ +125°C

Output Voltage Range ...................................... 1.3V to 12V

PackageThermal Resistance

JA 16-lead SOP ............................................... 100°C/W

JA 16-lead QSOP ............................................. 163°C/W

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