November 2000

3

MIC4043

MIC4043

Micrel

Electrical Characteristics

T

Parameter

Condition

Min

Typ

Max

Units

Reference Voltage, Note 4

1.245

V

Reference Voltage Tolerance

±1%

%

Supply Current

I

35

65

µA

70

µA

Transconductance

1mA < I

3.5

150

S

∆I

2

S

Output Transistor

I

160

250

mV

Saturation Voltage

400

mV

Output Leakage

V

0.5

µA

1

µA

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. Human body model, 1.5k in series with 100pF. Machine model, 200pF.

Note 4.

Reference voltage is not referenced to ground. The reference is between pins IN and FB.

Test Circuits

IN

R

A

1k

R1

R2

33k

C1*

50

Ω

R3

GND FB

SNK

OUT

RETURN

MIC4043

Floating

Bench

Supply

R

R

OUTPUT

R

A

A

A

* Compensation element

Do Not Ground!

Analyzer

V

T

U

O

1

R2

R

V

8

.

1k

2

7k

3

3

V

5

.

2k

3

3k

3

3

V

3

.

3k

0

2k

3

3

3

R

k

0

2

k

0

4

k

0

15

1

C

0.001

µF

0.001

µF

0.001

µF

Test Circuit 1. Compensation (Bode Plot) Circuit

IN

1k

R1

R2

33k

R3

C1

GND FB

SNK

OUT

RETURN

MIC4043

Supply

* Compensation components

Test Circuit 2. Transient Response Circuit