MIC2940A-12WU Micrel Inc, MIC2940A-12WU Datasheet - Page 4
![IC REG LDO 1.25A 12V TO-263](/photos/7/59/75999/576-to-263-5_sml.jpg)
MIC2940A-12WU
Manufacturer Part Number
MIC2940A-12WU
Description
IC REG LDO 1.25A 12V TO-263
Manufacturer
Micrel Inc
Datasheet
1.MIC2941AWU_TR.pdf
(11 pages)
Specifications of MIC2940A-12WU
Regulator Topology
Positive Fixed
Voltage - Output
12V
Voltage - Input
Up to 26V
Voltage - Dropout (typical)
0.4V @ 1.25A
Number Of Regulators
1
Current - Output
1.25A
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
TO-263-3, D²Pak (3 leads + Tab), TO-263AA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Current - Limit (min)
-
Other names
576-2237
MIC2940A-12WU
MIC2940A-12WU
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MIC2940A-12WU
Manufacturer:
MICREL
Quantity:
6 700
Electrical Characteristics (MIC2941A Only)
Notes:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10. When used in dual supply systems where the regulator load is returned to a negative supply, the output voltage must be diode clamped to ground.
11. Maximum positive supply voltage of 60 V must be of limited duration (< 100 ms) and duty cycle (≤ 1%). The maximum continuous supply voltage is
Micrel, Inc.
Parameter
Reference Voltage
Adjust Pin Bias Current
Reference Voltage Temperature Coefficient
Adjust Pin Bias Current Temperature
Coefficient
Shutdown Input
Input Logic Voltage
Shutdown Pin Input Current
Regulator Output Current in Shutdown
July 2007
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 rated operating conditions. The maximum allowable power dissipation is a function of the maximum junction temperature,
T
temperature is calculated using: P
temperature, and the regulator will go into thermal shutdown.
Output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range.
Regulation is measured at constant junction temperature using low duty cycle pulse testing. Changes in output voltage due to heating effects are
covered by the thermal regulation specification.
Dropout Voltage is defined as the input to output differential at which the output voltage drops 100 mV below its nominal value measured at 1V
differential. At low values of programmed output voltage, the minimum input supply voltage of 4.3V over temperature must be taken into account.
Ground pin current is the regulator quiescent current. The total current drawn from the source is the sum of the load current plus the ground pin
current.
The MIC2940A features fold-back current limiting. The short circuit (V
voltage.
Thermal regulation is defined as the change in output voltage at a time T after a change in power dissipation is applied, excluding load or line
regulation effects. Specifications are for a 200mA load pulse at V
V
Circuit of Figure 3 with R1 ≥ 150k Ω. V
26V.
J(MAX)
REF
≤ V
, the junction-to-ambient thermal resistance, θ
OUT
≤ (V
IN
– 1 V), 4.3V ≤ V
(MAX)
IN
26V, 5mA < I
= (T
SHUTDOWN
J(MAX)
≥ 2 V and V
– T
L
Condition
(Note 8)
Low (ON)
High (OFF)
V
V
(Note 10)
≤1.25A, T
A
JA
SHUTDOWN
SHUTDOWN
) / θ
, and the ambient temperature, T
JA
. Exceeding the maximum allowable power dissipation will result in excessive die
IN
J
≤ 26 V,V
≤T
= 2.4V
= 26V
J(MAX)
IN
= 20V (a 4W pulse) for T = 10ms.
.
OUT
OUT
= 0V) current limit is less than the maximum current with normal output
= 0.
4
A
. The maximum allowable power dissipation at any ambient
1.223
1.210
1.204
Min
2.0
1.235
Typ
450
0.1
1.3
0.7
20
20
30
3
MIC2940A/2941A
1.247
1.260
1.266
Max
100
600
750
40
60
50
30
60
M9999-071307
ppm/°C
nA/°C
Units
nA
nA
µA
µA
µA
µA
µA
µA
V
V
V
V
V
V