October 2003

3

M0334-102203

MIC4682

Micrel

Supply Voltage (V

Shutdown Voltage (V

Steady-State Output Switch Voltage (V

Feedback Voltage (V

Current Limit Set Voltage (V

Ambient Storage Temperature (T

ESD Rating, Note 5 ...................................................... 2kV

Electrical Characteristics

V

Symbol

Parameter

Condition

Min

Typ

Max

Units

V

IN

Supply Voltage Range

Note 4

434

V

I

IN

Quiescent Current

V

7

12

mA

I

IN

Standby Quiescent Current

V

35

100

µA

V

1

µA

V

FB

Feedback Voltage

(

±1%)

1.217

1.230

1.243

V

(

±2%)

1.205

1.255

V

8V

≤ V

1.193

1.230

1.267

V

1.180

1.280

V

I

LIM

Current Limit Accuracy, Note 7

See Test Circuit, V

0.90

1

1.10

A

f

SW

Oscillator Frequency

180

200

220

kHz

D

MAX

Maximum Duty Cycle

V

93

95

%

V

SW

Switch Saturation Voltage

I

1.4

1.8

V

I

SW

Switch Leakage Current

V

2

100

µA

V

2

10

mA

V

SHDN

Shutdown Input Logic Level

Regulator Off

2

1.4

V

Regulator On

1.25

0.8

V

I

SHDN

Shutdown Input Current

V

–10

–0.5

1

µA

V

–10

–1.5

1

µA

T

J

Thermal Shutdown

160

°C

Note 1. Exceeding the absolute maximum rating may damage the device.

Note 2. This device is not guaranteed to operate beyond its specified operating rating.

Note 3. Absolute maximum rating is intended for voltage transients only; prolonged DC operation is not recommended.

Note 4. V

Note 5. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k

Ω in series with 100pF.

Note 6. Measured on 1.5” square of 1oz. copper FR4 printed circuit board connected to the device ground leads.

Note 7. Short circuit protection is guaranteed to V

Supply Voltage (V

Junction Temperature Range (T

Package Thermal Impedance

θ

θ