Micrel, Inc. MIC37252
February 2006
3
M9999-021606
(408) 955-1690
Absolute Maximum Ratings
(1)
Supply Voltage (V
IN
)......................................................6.5V
Enable Input Voltage (V
EN
)............................................6.5V
Power Dissipation .....................................Internally Limited
Junction Temperature .........................–40°C ≤ T
J
≤ +125°C
Storage Temperature ..........................–65°C ≤ T
J
≤ +150°C
Lead Temperature (soldering, 5sec.)......................... 260°C
EDS
(3)
Operating Ratings
(2)
Supply voltage (V
IN
) ......................................... 3.0V to 6.0V
Enable Input Voltage (V
EN
).................................. 0V to 6.0V
Junction Temperature Range .............–40°C ≤ T
J
≤ +125°C
Maximum Power Dissipation
(4)
Package Thermal Resistance
S-Pak (θ
JC
) ..........................................................2°C/W
TO-263-5 (θ
JC
).....................................................2°C/W
Electrical Characteristics
(5)
T
A
= 25°C with V
IN
= V
OUT
+ 1V; V
EN
= V
IN
; I
L
= 10mA, bold values indicate –40°C< T
J
< +125°C, unless otherwise noted.
Parameter Condition Min Typ Max Units
I
L
= 10mA -2 +2 % Output Voltage Accuracy
10mA < I
OUT
< I
L(max)
, V
OUT
+ 1 ≤ V
IN
≤ 6V
-3 +3
%
Output Voltage Line Regulation V
IN
= V
OUT
+ 1.0V to 6.0V, I
L
= 10mA 0.02
0.5
%
Output Voltage Load Regulation I
L
= 10mA to 2.5A 0.2
1
%
I
L
= 1.5A 400
500
mV
V
IN
– V
OUT
; Dropout Voltage,
Note 6
I
L
= 2.5A 550
1000
mV
Ground Pin Current, Note 7
I
L
= 2.5A 40
60
mA
Ground Pin Current in Shutdown V
IL
≤ 0.5V, V
IN
= V
OUT
+ 1V 1.0
µA
Current Limit V
OUT
= 0; V
IN
= 3.3V 3
A
Start-up Time V
EN
= V
IN
, I
OUT
= 10mA, C
OUT
= 47µF 150
250
µs
Enable Input
Regulator enable
2.25
V Enable Input Threshold
Regulator shutdown
0.8
V
V
IL
≤ 0.8V (Regulator shutdown)
2
4
µA
µA
Enable Pin Input Current
V
IH
≥ 2.25V (Regulator enable) 1 10
30
µA
Reference Voltage
1.215
1.202
1.240
1.265
1.277
V
V
Adjust Pin Bias Current 40
80
120
nA
nA
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. Device is ESD sensitive. Handling precautions recommended.
4. P
D(max)
= T
J(max)
– T
A
) / θ
JA
, where θ
JA
, depends upon the printed circuit layout. See “Applications Information.”
5. Specification for packaged product only
6. V
DO
= V
IN
– V
OUT
when V
OUT
decreased to 98% of its nominal output voltage with V
IN
= V
OUT
+ 1V. For output voltages below 2V, dropout voltage
specification does not apply due to a minimum input operating voltage of 3V
7. I
GND
is the quiescent current. I
IN
= I
GND
+ I
OUT
.
