August 2004

3

MIC4826

MIC4826

Micrel

Electrical Characteristics

V

Symbol

Parameter

Condition

Min

Typ

Max

Units

R

DS(ON)

On-resistance of switching transistor

I

3.8

7.0

Ω

V

CS

Output voltage regulation

V

75

80

85

V

73

87

V

V

Output peak-to-peak voltage

V

150

160

170

V

146

174

V

V

EN-L

Input low voltage (turn off)

V

0.5

V

V

EN-H

Input high voltage (turn on)

V

V

V

I

SD

Shutdown current, Note 4

R

0.01

0.1

µA

V

0.5

µA

I

VDD

Input supply current

R

21

75

µA

V

I

CS

Boosted supply current

R

200

400

µA

V

I

IN

Input current including inductor

V

28

mA

current

(See Test Circuit)

f

EL

V

285

360

435

Hz

f

SW

Switching transistor frequency

53

66

79

kHz

D

Switching transistor duty cycle

90

%

Note 1.

Exceeding the absolute maximum rating may damage the device.

Note 2.

The device is not guaranteed to function outside its operating rating.

Note 3.

Devices are ESD sensitive. Handling precautions recommended.

Note 4.

Shutdown current is defined as the sum of current going into pin 1, 5, and 6 when the device is disabled.

Test Circuit

442k

2M

0.01

µF/100V

D1

1N4148

L1

220

µH

15

6

8

7

2

3

4

SW

CS

VA

VB

VDD

RSW

REL

GND

MIC4826

10

µF

10nF

100

Ω

Supply Voltage (V

Output Voltage (V

Frequency Control Voltage (V

Power Dissipation @ T

Storage Temperature (T

ESD Rating .............................................................. Note 3

Supply Voltage (V

Lamp Drive Frequency (f

Switching Transistor Frequency (f

Ambient Temperature (T

Package Thermal Resistance

8-pin MSOP

(θ