April 2005 3 M9999-042205
MIC2288 Micrel, Inc.
Absolute Maximum Ratings
(1)
Supply Voltage (V
IN
) ..................................................... 12V
Switch Voltage (V
SW
) ..................................... –0.3V to 34V
Enable Pin Voltage (V
EN
) ................................... –0.3 to V
IN
FB Voltage (V
FB
) ............................................................. 6V
Switch Current (I
SW
) ....................................................... 2A
Storage Temperature (T
S
) ....................... –65°C to +150°C
ESD Rating
(3)
................................................................ 2kV
Operating Ratings
(2)
Supply Voltage (V
IN
) ........................................ 2.5V to 10V
Junction Temperature Range (T
J
) ........... –40°C to +125°C
Package Thermal Impedance
2mm × 2mm MLF™-8 (θ
JA
) ................................. 93°C/W
Thin SOT-23-5 (θ
JA
) ..........................................256°C/W
Electrical Characteristics
(4)
T
A
= 25°C, V
IN
= V
EN
= 3.6V, V
OUT
= 10V, I
OUT
= 20mA, unless otherwise noted. Bold values indicate –40°C ≤ T
J
≤ ±125°C.
Symbol Parameter Condition Min Typ Max Units
V
IN
Supply Voltage Range 2.5 10 V
V
UVLO
Under Voltage Lockout 1.8 2.1 2.4 V
I
VIN
Quiescent Current V
FB
= 2V, (not switching) 2.8 5 mA
I
SD
Shutdown Current V
EN
= 0V
(5)
0.1 1 µA
V
FB
Feedback Voltage (±1%) 1.227 1.24 1.252 V
(±2%) (Over Temp) 1.215 1.265 V
I
FB
Feedback Input Current V
FB
= 1.24V –450 nA
Line Regulation 3V ≤ V
IN
≤ 5V 0.1 1 %
Load Regulation 5mA ≤ I
OUT
≤ 40mA 0.2 %
D
MAX
Maximum Duty Cycle 85 90 %
I
SW
Switch Current Limit 1.2 A
V
SW
Switch Saturation Voltage I
SW
= 1A 550 mV
I
SW
Switch Leakage Current V
EN
= 0V, V
SW
= 10V 0.01 5 µA
V
EN
Enable Threshold Turn on 1.5 V
Turn off 0.4 V
I
EN
Enable Pin Current V
EN
= 10V 20 40 µA
f
SW
Oscillator Frequency 1.05 1.2 1.35 MHz
V
OVP
Output Overvoltage Protection MIC2288 MLF™ package option only 30 32 34 V
T
J
Overtemperature 150 °C
Threshold Shutdown Hysteresis 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, 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.
2. This device is not guaranteed to operate beyond its specified operating rating.
3. IC devices are inherently ESD sensitive. Handling precautions required. Human body model rating: 1.5K in series with 100pF.
4. Specification for packaged product only.
5. I
SD
= I
VIN
.
