MIC2142 Datasheet, PDF (3/17 Pages) Micrel Semiconductor – Micropower Boost Converter

MIC2142
Absolute Maximum Ratings (Note 1)
Supply voltage (V_CC) ..................................................... 18V
Switch voltage (V_SW) .................................................... 24V
Enable pin voltage (V_EN) Note 3 ................................... 18V
Feedback Voltage (V_FB)
Adjustable version ....................................................... 8V
Ambient Storage Temperature (T_S) ......... –65°C to +150°C
Micrel
Operating Ratings (Note 2)
Supply Voltage (V_CC) ....................................... 2.2V to 16V
Enable pin voltage (V_EN) Note 3 ......................... 0V to 16V
Switch Voltage (V_SW) .................................................... 22V
Ambient Temperature (T_A) ......................... –40°C to +85°C
Junction Temperature Range (T_J) ........... –40°C to +125°C
Package Thermal Impedance
θ_JA SOT23-5 ..................................................... 220°C/W
Electrical Characteristics
V_CC =3.6V, V_OUT = 5V, I_OUT = 20mA, T_A=25°C; unless otherwise specified. Bold values indicate 25°C ≤ T_J ≤ 125°C.
Parameter
Condition
Min Typ
Max
Units
Input Voltage
2.2
16
V
Quiescent Current
Feedback Voltage (V_FB)
V_EN = ON , V_FB = 2.2V
V_EN = OFF (shutdown)
(±2%)
(±3%)
85
125
µA
0.1
2
µA
1.254 1.28 1.306 V
1.241
1.312 V
Comparator Hysteresis
18
mV
Feedback Input Bias Current
Note 4
30
nA
Enable Input Voltage
Enable Input Current
V_IH (turn on)
V_IL (turn off)
0.6V_CC 0.55V_CC
V
1.1
0.8
V
–1 0.01
1
µA
Load Regulation
Line Regulation
SW on Resistance
Switch Leakage Current
Oscillator Frequency
200µA ≤ I_OUT ≤ 20mA
2.2V ≤ V_CC ≤ 16V; I_OUT = 4mA
I_SW = 100mA, V_CC = 2.5V
I_SW = 100mA, V_CC = 12V
V_EN = OFF, V_SW = 12V
0.2
0.25
%V_OUT
%/V
5
Ω
2
Ω
0.05
1
µA
295 330 365 kHz
Duty Cycle
50
57
65
%
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not apply when
operating the device outside of its operating ratings. The maximum allowable power dissipation is a function of the maximum junction
temperature, T_J(Max), the junction-to-ambient thermal resistance, θ_JA, and the ambient temperature, T_A. The maximum allowable power
dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown. The θ_JA of the power SOT23-5 is 220°C/W
mounted on a PC board.
The device is not guaranteed to function outside its operating rating.
V_EN must be ≤ V_IN
The maximum suggested value of the programming resistor, whose series resistance is measured from feedback to ground, is 124kΩ. Use of
larger resistor values can cause errors in the output voltage due to the feedback input bias current.
Devices are ESD sensitive, handling precautions required.
December 2000
3
MIC2142