MIC4575-3.3BU datasheet(3/15 Pages) MICREL

3 / 15 page

Micrel, Inc.

MIC4575

July 2009

M9999-072909

Absolute Maximum Ratings

Supply Voltage (VIN)

(1) ..................................................+40V

Shutdown Voltage (VSHDN)............................. –0.3V to +36V

Output Switch (VSW) .......................................................–1V

Storage Temperature (Ts) ........................... –65°C to 150°C

ESD

(2)

Operating Ratings

Supply Voltage (VIN).....................................................+24V

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

Package Thermal Resistance

TO-220, TO-263 (

θJA) ........................................65°C/W

TO-220, TO-263 (

θJC) ..........................................2°C/W

Electrical Characteristics

(4)

VIN = 12V; ILOAD = 200mA; TJ = 25°C, bold values indicate –40°C< TJ < +85°C, unless noted.

Parameter

Condition

Min

Typ

Max

Units

MIC4575 [Adjustable]

Feedback Voltage

1.217

1.230

1.243

Feedback Voltage

8V ≤ VIN ≤ 24V, 0.2A ≤ ILOAD ≤ 1A

1.193

1.180

1.230

1.267

1.280

Efficiency

ILOAD = 1A, VOUT = 5V

Feedback Bias Current

100

500

MIC4575-3.3

Output Voltage

3.234

3.3

3.366

Output Voltage

6V ≤ VIN ≤ 24V, 0.2A ≤ ILOAD ≤ 1A

3.168

3.135

3.3

3.432

3.465

Efficiency

ILOAD = 1A

MIC4575-5.0

Output Voltage

4.900

5.0

5.100

Output Voltage

8V ≤ VIN ≤ 24V, 0.2A ≤ ILOAD ≤ 1A

4.800

4.750

5.0

5.200

5.250

Efficiency

ILOAD = 1A

MIC4575 / -3.3 / -5.0

Oscillator Frequency

180

200

220

kHz

Saturation Voltage

IOUT = 1A

1.3

1.5

Maximum Duty Cycle (On)

FB connected to 0V

Current Limit

Peak Current, tON ≤ 3µs

1.7

1.3

2.2

3.0

3.2

Output Leakage Current

VIN = 24V, FB connected to 0V

Output = 0V

Output = –1V

7.5

Quiescent Current

Standby Quiescent Current

SHDN = 5V (regulator off)

200

µA

SHDN Input Logic Level

VOUT = 0V (regulator off)

2.2

2.4

1.4

VOUT = 3.3 or 5V (regulator on)

1.2

1.0

0.8

SHDN Input Current

SHDN = 5V (regulator off)

SHDN = 0V (regulator on)

–10

0.01

µA

Notes:

1. The MIC4575 is not guaranteed to survive a short circuit to ground for input voltage above 24V.

2. Devices are ESD sensitive. Handling precautions recommended.

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