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MIC38C42/3/4/5

Micrel, Inc.

M9999-091107

September 2007

Electrical Characteristics

VDD = 15V, Note 4; RT = 11.0k; CT = 3.3nF; –40°C ≤ TA ≤ 85°C; unless noted

Parameter

Test Conditions

Min

Typ

Max

Units

Reference Section

Output Voltage

TA = 25°C, IO = 1mA

4.90

5.00

5.10

Line Regulation

12V ≤ VDD ≤ 18V, IO = 5µA, Note 6

Load Regulation

1 ≤ IO ≤ 20mA

Temp. Stability

Note 1

0.2

mV/°C

Total Output Variation

Line, Load, Temp.,

Note 1

4.82

5.18

Output Noise Voltage

10Hz ≤ f ≤ 10kHz, TA = 25°C, Note 1

µV

Long Term Stability

TA = 125°C, 1000 hrs., Note 1

Output Short Circuit

–30

–80

–180

Oscillator Section

Initial Accuracy

TA = 25°C, Note 5

kHz

Voltage Stability

12 ≤ VDD ≤ 18V, Note 6

0.2

1.0

Temp. Stability

TMIN ≤ TA ≤ TMAX, Note 1

0.04

%/°C

Clock Ramp

TA = 25°C, VRT/CT = 2V

7.7

8.4

9.0

Reset Current

TA = TMIN to TMAX

7.2

8.4

9.5

Amplitude

VRT/CT peak to peak

1.9

Vp-p

Error Amp Section

Input Voltage

VCOMP = 2.5V

2.42

2.50

2.58

Input Bias Current

VFB = 5.0V

–0.1

–2

µA

AVOL

2 ≤ VO ≤ 4V

Unity Gain Bandwidth

Note 1

0.7

1.0

MHz

PSRR

12 ≤ VDD ≤ 18V

Output Sink Current

VFB = 2.7V, VCOMP = 1.1V

Output Source Current

VFB = 2.3V, VCOMP = 5V

–0.5

–1

VOUT High

VFB = 2.3V, RL = 15k to ground

6.8

VOUT Low

VFB = 2.7V, RL = 15k to VREF

0.1

1.1

Absolute Maximum Ratings

Zener Current (VDD) ................................................... 30mA

Operation at ≥18V may require

special precautions (Note 6).

Supply Voltage (VDD), Note 6........................................20V

Switch Supply Voltage (VD)...........................................20V

Current Sense Voltage (VISNS).......................–0.3V to 5.5V

Feedback Voltage (VFB) .................................–0.3V to 5.5V

Output Current, 38C42/3/4/5 (IOUT) ............................. 0.5A

Storage Temperature (TA)......................... –65°C to +150°C

Operating Ratings

Junction Temperature (TJ)......................................... 150°C

Package Thermal Resistance

8-Pin Plastic DIP (θJA).......................................125°C/W

8-Pin MSOP (θJA)..............................................250°C/W

8-Pin SOIC (θJA)................................................170°C/W

14-Pin Plastic DIP (θJA) ......................................90°C/W

14-Pin SOIC (θJA)..............................................145°C/W

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