MIC2297 datasheet(3/12 Pages) MICREL

3 / 12 page

Micrel, Inc.

MIC2297

May 2005

M9999-050305

(408) 955-1690

Absolute Maximum Rating

(1)

Supply voltage (VIN)........................................................12V

Switch voltage (VSW) ........................................ -0.3V to 50V

Enable pin voltage (VEN)....................................... -0.3 to VIN

FB Voltage (VFB)...............................................................6V

VBRT ..................................................................................6V

Switch Current (ISW) .........................................................3A

Ambient Storage Temperature (TS)............-65°C to +150°C

ESD Rating

(3)................................................................ 2KV

Operating Range

(2)

Supply Voltage (VIN).......................................... 2.5V to 10V

Maximum Output Voltage (VOUT)....................................40V

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

Package Thermal Impedance

θJA 2.5mm x2.5mm MLF™-10L lead .................65°C/W

Electrical Characteristics

TA=25

oC, VIN =VEN = 3.6V, VOUT = 30V, IOUT = 20mA, unless otherwise noted. Bold values indicate -40°C ≤ TJ ≤ 125°C.

Symbol

Parameter

Condition

Min

Typ

Max

Units

VIN

Supply Voltage Range

2.5

VUVLO

Under-Voltage Lockout

1.8

2.1

2.4

IVIN

Quiescent Current

VFB = 200mV (not switching)

mA

ISD

Shutdown Current

VEN = 0V

(4)

0.1

µA

(+/-5%)

190

200

VFB

Feedback Voltage

(+/±6.5%) (Over Temp)

187

213

IFB

Feedback Input Current

VFB = 200mV

-450

Line Regulation

2.5V

≤ VIN ≤ 4.5V

0.5

Load Regulation

5mA

≤ IOUT ≤ 20mA

0.5

DMAX

Maximum Duty Cycle

ISW

Switch Current Limit

VIN 2.5V

1.2

1.7

2.5

VSW

Switch Saturation Voltage

VIN = 2.5V, ISW = 0.5A

220

ISW

Switch Leakage Current

VEN = 0V, VIN = 10V

0.01

µA

VEN

Enable Threshold

TURN ON

TURN OFF

1.5

0.4

IEN

Enable Pin Current

VEN = 10V

µA

VREF

Brightness Control Accuracy

VBRT = 0V

VBRT = 1V

VBRT = 5V

VBRT = OPEN

0.185

0.95

0.19

0.2

1.0

0.2

0.015

0.215

1.05

0.21

fSW

Oscillator Frequency

525

600

675

KHz

VOVP

Over Voltage protection

MIC2297-42BML (nominal voltage)

MIC2297-15BML (nominal voltage)

150

°C

Over-Temperature Threshold

Shutdown

Hysteresis

°C

MIC2297 Datasheet(PDF) 3 Page - Micrel Semiconductor

MIC2297 Datasheet(HTML) 3 Page - Micrel Semiconductor

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12

Datasheet Download

Link URL