Micrel, Inc.
MIC2601/2
Absolute Maximum Ratings
(1)
Supply Voltage (V
IN
) .......................................................22V
Switch Voltage (V
SW
)....................................... –0.3V to 40V
Enable Voltage (V
EN
)......................................... –0.3V to V
IN
FB Voltage (V
FB
)...............................................................6V
Ambient Storage Temperature (T
s
) ...........–65°C to +150°C
Lead Temperature (soldering 10sec)......................... 260°C
ESD Rating..................................................................... 2kV
Operating Ratings
(2)
Supply Voltage (V
IN
).......................................... 4.5V to 20V
Enable Voltage (V
EN
)............................................ 0V to 20V
Junction Temperature (T
J
) ........................ –40°C to +125°C
Junction Thermal Resistance
2mm x 2mm MLF-8 (θ
JA
) ...................................90°C/W
2mm x 2mm MLF-8 (θ
JC
) ...................................45°C/W
Electrical Characteristics
(3)
T
A
= 25°C, V
IN
= V
EN
= 12V; unless otherwise noted.
Bold
values indicate –40°C
≤
T
J
≤
+125°C.
Symbol
V
IN
V
DD
V
ULVO
I
Q
I
SD
V
FB
I
FB
Parameter
Input Voltage Range
Internal Regulated Voltage
Under-voltage Lockout
Quiescent Current
Shutdown Current
Feedback Voltage
Feedback Input Current
Line Regulation
Load Regulation
SS
R
D
MAX
I
SW
V
SW
I
SW
V
EN
I
EN
f
SW
V
OVP
T
J
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. The device is not guaranteed to function outside its operating rating.
3. Specification for packaged product only.
4. Connect V
DD
pin to V
IN
pin when V
IN
≤
7V.
5. I
SD
= I
VIN
.
6. Guaranteed by design.
Condition
Note 4
For V
DD
V
FB
= 2V (not switching)
V
EN
= 0V,
Note 5
(±2%)
(±3%) (over temperature)
V
FB
= 1.25V
8V
≤
V
IN
≤
14V, V
OUT
= 18V
5mA
≤
I
OUT
≤
400mA, V
OUT
= 18V,
Note 6
MIC2601
MIC2602
Note 6
I
SW
= 1.2A
V
EN
= 0V, V
SW
= 18V
Turn ON
Turn OFF
V
EN
= 12V
Min
4.5
Typ
6.0
Max
20
Units
V
V
V
mA
µA
V
V
nA
%
%
kΩ
%
%
1.8
2.1
4.2
0.08
2.4
6
2
1.285
1.298
1.235
1.222
1.26
–550
0.04
0.1
15
1
Internal Soft Start Resistor
Maximum Duty Cycle
Switch Current Limit
Switch Saturation Voltage
Switch Leakage Current
Enable Threshold
Enable Pin Current
Oscillator Frequency (MIC2601)
Oscillator Frequency (MIC2602)
Output Over-voltage Protection
Over-temperature Threshold
Shutdown
15% Over programmed V
OUT
(rising)
Hysteresis
85
80
1.2
1.7
500
0.01
5
0.3
18.5
40
1.38
2.3
20
A
mV
µA
V
V
µA
MHz
MHz
%
°C
°C
1.5
1.02
1.7
10
1.12
1.92
15
150
10
September 2009
3
M9999-090909-A
MICREL [ MICREL SEMICONDUCTOR ]
