MIC2571_02 datasheet(3/12 Pages) MICREL

Part #	MIC2571

Description	Single-Cell Switching Regulator

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Manufacturer	MICREL [Micrel Semiconductor]

Direct Link	http://www.micrel.com

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3 / 12 page

1997

3

MIC2571

Micrel

Electrical Characteristics

VIN = 1.5V; TA = 25°C, bold indicates –40°C ≤ TA ≤ 85°C; unless noted

Parameter

Condition

Min

Typ

Max

Units

Input Voltage

Startup guaranteed, ISW = 100mA

15

V

0.9

V

2.7

3.14

4.75

3.0

3.47

5.25

208

232

Quiescent Current

Output switch off

120

µA

Fixed Feedback Voltage

MIC2571-1; V2.85V pin = VOUT, ISW = 100mA

2.85

V

MIC2571-1; V3.3V pin = VOUT, ISW = 100mA

3.30

V

MIC2571-1; V5V pin = VOUT, ISW = 100mA

5.00

V

Reference Voltage

MIC2571-2, [adj. voltage versions], ISW = 100mA, Note 1

220

mV

Comparator Hysteresis

MIC2571-2, [adj. voltage versions]

6

mV

Output Hysteresis

MIC2571-1; V2.85V pin = VOUT, ISW = 100mA

65

mV

MIC2571-1; V3.3V pin = VOUT, ISW = 100mA

75

mV

MIC2571-1; V5V pin = VOUT, ISW = 100mA

120

mV

Feedback Current

MIC2571-1; V2.85V pin = VOUT

4.5

µA

MIC2571-1; V3.3V pin = VOUT

4.5

µA

MIC2571-1; V5V pin = VOUT

4.5

µA

MIC2571-2, [adj. voltage versions]; VFB = 0V

25

nA

Reference Line Regulation

1.0V ≤ VIN ≤ 12V

0.35

%/V

Switch Saturation Voltage

VIN = 1.0V, ISW = 200mA

200

mV

VIN = 1.2V, ISW = 600mA

400

mV

VIN = 1.5V, ISW = 800mA

500

mV

Switch Leakage Current

Output switch off, VSW = 36V

1

µA

Oscillator Frequency

MIC2571-1, -2; ISW = 100mA

20

kHz

Maximum Output Voltage

36

V

Sync Threshold Voltage

0.7

V

Switch On Time

35

µs

Currrent Limit

1.1

A

Duty Cycle

VFB < VREF, ISW = 100mA

67

%

General Note: Devices are ESD protected; however, handling precautions are recommended.

Note 1: Measured using comparator trip point.

Absolute Maximum Ratings

Supply Voltage (VIN) .....................................................18V

Switch Voltage (VSW) ....................................................36V

Switch Current (ISW) .......................................................1A

Sync Voltage (VSYNC) .................................... –0.3V to 15V

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

MSOP Power Dissipation (PD) ................................250mW

Operating Ratings

Supply Voltage (VIN) .................................... +0.9V to +15V

Ambient Operating Temperature (TA) ........ –40°C to +85°C

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

MSOP Thermal Resistance (θJA) ..........................240°C/W

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