MIC4043_11 Datasheet, PDF (3/12 Pages) MIC GROUP RECTIFIERS – Low-Voltage Secondary-Side Shunt Regulator Final Information

MIC4043
Micrel
Electrical Characteristics
T_A = 25°C, bold values indicate –40°C ≤ T_A ≤ +85°C; unless noted
Parameter
Condition
Reference Voltage, Note 4
Reference Voltage Tolerance
Supply Current
Transconductance
∆I_SINK/∆V_IN
Output Transistor
Saturation Voltage
Output Leakage
I_SNK = 0mA
1mA < I_SNK < 15mA
I_SNK = 15mA
V_SNK = 5V, output transistor off
Min Typ Max Units
1.245
V
±1
%
±2
%
35
65
µA
70
µA
3.5 150
S
2
S
160 250 mV
400 mV
0.5
µA
1
µA
Note 1.
Note 2.
Note 3.
Note 4.
Exceeding the absolute maximum rating may damage the device.
The device is not guaranteed to function outside its operating rating.
Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF. Machine model, 200pF.
Reference voltage is not referenced to ground. The reference is between pins IN and FB.
Test Circuits
Floating
Bench
Supply
OUT
RETURN
Do Not Ground!
V_OUT
R1
1.8V
72k
2.5V
33k
3.3V
20k
1k
R
R2
33k
33k
33k
MIC4043
R1
IN SNK
A
GND FB
R2
33k
C1*
R
R3
50Ω
A
* Compensation element
R3
20k
40k
150k
C1
0.001µF
0.001µF
0.001µF
Analyzer
R
R
OUTPUT
A
A
Test Circuit 1. Compensation (Bode Plot) Circuit
Supply
MIC4043
R1
1k
OUT
IN SNK
RETURN
GND FB
R2
33k
R3
C1
* Compensation components
Test Circuit 2. Transient Response Circuit
November 2000
3
MIC4043