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MIC2253_11 Datasheet, PDF (3/13 Pages) Micrel Semiconductor – 3.5A 1MHz High Efficiency Boost Regulator with OVP and Softstart
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Micrel, Inc.
MIC2253
Absolute Maximum Ratings(1)
Supply Voltage (VIN) .......................................................12V
Switch Voltage (VSW)....................................... –0.3V to 34V
Enable Voltage (VEN)....................................... –0.3V to 12V
FB Voltage (VFB)...............................................................6V
Switch Current (ISW) ..................................Internally Limited
Ambient Storage Temperature (Ts) ...........–65°C to +150°C
ESD Rating(3).................................................................. 2kV
Operating Ratings(2)
Supply Voltage (VIN).......................................... 2.5V to 10V
Enable Voltage (VEN).............................................. 0V to VIN
Junction Temperature (TJ) ........................ –40°C to +125°C
Package Thermal Impedance
3mm x 3mm MLF-12 (θJA) .................................60°C/W
Electrical Characteristics(4)
TA = 25°C; VIN = VEN = 3.6V; unless otherwise noted. Bold values indicate –40°C≤ TJ ≤ +125°C.
Symbol Parameter
Condition
Min Typ
VIN
VUVLO
VOVP
IVIN
ISD
Supply Voltage Range
Under-Voltage Lockout
Over-Voltage Protection
Quiescent Current
Shutdown Current
VFB >1.245V, Not Switching
VEN = 0V(5)
2.5
1.8
2.1
5.25 5.6
15
0.1
VFB
Feedback Voltage
1.208 1.245
Max
10
2.4
6.3
23
1
1.283
Units
V
V
V
mA
µA
V
IFB
Feedback Input Current
VFB = 1.245V
-450
nA
Line Regulation
3.0V ≤ VIN ≤ 4.5V
0.5
%
DMIN
Minimum Duty Cycle
10
%
DMAX
Maximum Duty Cycle
90
%
ISW
Switch Current Limit
VSW
Switch Saturation Voltage
ISW
Switch Leakage Current
VEN
Enable Threshold
VIN = 3.6V
VIN = 3.6V, ISW = 3.5A
VEN = 0V, VSW = 10V
TURN ON
TURN OFF
3.5 4.75
8
A
350
500
mV
0.01
10
µA
1.5
V
0.4
IEN
Enable Pin Current
fSW
Oscillator Frequency
ISS
Soft start
VEN = 10V
VSS = 0V
TJ
Over-Temperature Threshold
Shutdown
Hysteresis
20
40
µA
0.8
1
1.2
MHz
30
µA
150
°C
10
°C
Notes:
1. 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, TJ(Max), the
junction-to-ambient thermal resistance, θ JA, and the ambient temperature, TA. The maximum allowable power dissipation will result in excessive die
temperature, and the regulator will go into thermal shutdown.
2. The device is not guaranteed to function outside its operating rating.
3. Devices are ESD sensitive. Handling precautions recommended. Human Body Model, 1.5kΩ in series with 100pF.
4. Specification for packaged product only.
5. ISD = IVIN
April 2011
3
M9999-042011-C
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