Micrel, Inc.
MIC2940A/2941A
Input Supply Voltage ...................................... –20V to +60V
Operating Input Supply Voltage .......................... 2V
†
to 26V
Adjust Input Voltage (Notes
9 and 10)
......... –1.5V to +26V
Shutdown Input Voltage ................................ –0.3V to +30V
Error Comparator Output Voltage ................. –0.3V to +30V
Absolute Maximum Ratings
If Military/Aerospace specified devices are required,
contact your local Micrel representative/distributor for
availability and specifications
Power Dissipation
(Note 1)
.......................Internally Limited
Lead Temperature (soldering, 5 sec.)........................ 260°C
Storage Temperature ................................–65°C to +150°C
Operating Junction Temperature ..............–40°C to +125°C
TO-220 (θ
JC
) ........................................................2°C/W
TO-263 (θ
JC
) ........................................................2°C/W
†
Across the full operating temperature, the minimum input voltage range
for full output current is 4.3V to 26V. Output will remain in-regulation at
lower output voltages and low current loads down to an input of 2V at
25°C.
Electrical Characteristics
Limits in standard typeface are for T
J
= 25°C and limits in
boldface
apply over the full operating temperature range.
Unless otherwise specified, V
IN
= V
OUT
+ 1V, I
L
= 1000mA, C
L
= 10µF. The MIC2941A is programmed to output 5V and
has V
SHUTDOWN
0.6V.
Symbol
V
O
Parameter
Output Voltage Accuracy
5 mA
≤
I
L
≤
1A
∆V
O
∆T
∆V
O
V
O
V
IN
– V
O
Output Voltage Temperature
Coefficient
Line Regulation
Load Regulation
Dropout Voltage (Note 4)
(Note 2)
I
O
= 10mA, (V
OUT
+ 1V)
≤
V
IN
≤
26V
I
L
= 5mA to 1.25A
I
L
= 5mA to 1A (Note
3)
I
L
= 5mA
I
L
= 250mA
I
L
= 1000mA
I
L
= 1250mA
I
GND
Ground Pin Current (Note
5)
I
L
= 5mA
I
L
= 250mA
I
L
= 1000mA
I
L
= 1250mA
I
GNDDO
I
LIMIT
∆V
O
∆P
D
e
n
Ground Pin Current at Dropout
(Note
5)
Current Limit
Thermal Regulation
Output Noise Voltage
(10Hz to 100kHz)
I
L
= 100mA
V
IN
= 0.5V less than designed V
OUT
(V
OUT
3.3)
I
L
= 5mA
V
OUT
= 0V (Note
6)
(Note
7)
C
L
= 10µF
C
L
= 33µF
Condition
Min
–1
–2
–2.5
20
0.06
0.04
60
200
350
400
240
3
22
35
330
1.6
0.05
400
260
Typ
Max
1
2
2.5
100
0.50
0.16
0.20
150
180
250
320
450
600
600
500
4.5
6
35
45
70
600
3.5
0.2
Units
%
%
%
ppm/°C
%
%
%
mV
mV
mV
mV
mV
mV
mV
µA
mA
mA
mA
mA
mA
µA
A
%/W
µV
RMS
µV
RMS
July 2007
3
M9999-071307
MICREL [ MICREL SEMICONDUCTOR ]
