MIC5255
Micrel
Absolute Maximum Ratings
(1)
Supply Input Voltage (V
IN
) .................................. 0V to +7V
Enable Input Voltage (V
EN
) ................................. 0V to +7V
Power Dissipation (P
D
) ........................ Internally Limited
(3)
Junction Temperature (T
J
) ....................... –40°C to +125°C
Storage Temperature (T
S
) ....................... –65°C to +150°C
Lead Temperature (soldering, 5 sec.) ....................... 260°C
ESD
(4) ..............................................................................................
2kV
Electrical Characteristics
(5)
Symbol
V
O
∆V
LNR
∆V
LDR
V
IN
– V
OUT
Parameter
Output Voltage Accuracy
Line Regulation
Load Regulation
Dropout Voltage
(7)
Conditions
I
OUT
= 100µA
Operating Ratings
(2)
Input Voltage (V
IN
) ......................................... +2.7V to +6V
Enable Input Voltage (V
EN
) .................................. 0V to V
IN
Junction Temperature (T
J
) ....................... –40°C to +125°C
Thermal Resistance
SOT-23
(θ
JA
) .....................................................235°C/W
2×2 MLF™
(θ
JA
) ..................................................90°C/W
V
IN
= V
OUT
+ 1V, V
EN
= V
IN;
I
OUT
= 100µA; T
J
= 25°C,
bold
values indicate –40°C
≤
T
J
≤
+125°C; unless noted.
Min
–1
–2
0.02
1.5
0.1
90
135
0.2
90
117
60
60
50
160
425
30
Typical
Max
1
2
0.05
2.5
5
150
200
250
1
150
Units
%
%
%/V
%
mV
mV
mV
mV
µA
µA
µA
dB
dB
dB
mA
µV(rms)
V
IN
= V
OUT
+ 1V to 6V
I
OUT
= 0.1mA to 150mA
(6)
I
OUT
= 100µA
I
OUT
= 100mA
I
OUT
= 150mA
I
Q
I
GND
PSRR
Quiescent Current
Ground Pin Current
(8)
V
EN
≤
0.4V (shutdown)
I
OUT
= 0mA
I
OUT
= 150mA
f = 10Hz, C
OUT
= 1.0µF, C
BYP
= 0.01µF
f = 100Hz, V
IN
= V
OUT
+1
f = 10kHz, V
IN
= V
OUT
+1
Ripple Rejection
I
LIM
e
n
Enable Input
V
IL
V
IH
I
EN
Current Limit
Output Voltage Noise
V
OUT
= 0V
C
OUT
= 1.0µF, C
BYP
= 0.01µF,
f = 10Hz to 100kHz
Enable Input Logic-Low Voltage
Enable Input Logic-High Voltage
Enable Input Current
V
IN
= 2.7V to 5.5V, regulator shutdown
V
IN
= 2.7V to 5.5V, regulator enabled
V
IL
≤
0.4V, regulator shutdown
V
IH
≥
1.6V, regulator enabled
1.6
0.01
0.01
500
0.4
V
V
µA
µA
Ω
°C
°C
Shutdown Resistance Discharge
Thermal Protection
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
150
10
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. The maximum allowable power dissipation of any T
A
(ambient temperature) is P
D
(max) = (T
J
(max)–T
A
)/θ
JA
. Exceeding the maximum allowable
power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown. The
θ
JA
of the MIC5255-x.xBM5 (all
versions) is 235°C/W on a PC board. See
“Thermal Considerations”
section for further details.
4. Devices are ESD sensitive. Handling precautions recommended.
5. Specification for packaged product only.
6. Regulation is measured at constant junction temperature using low duty cycle pulse testing. Parts are tested for load regulation in the load range
from 0.1mA to 150mA. Changes in output voltage due to heating effects are covered by the thermal regulation specification.
7. Dropout Voltage is defined as the input-to-output differential at which the output voltage drops 2% below its nominal value measured at 1V differen-
tial. For outputs below 2.7V, dropout voltage is the input-to-output voltage differential with the minimum input voltage 2.7V. Minimum input operating
voltage is 2.7V.
8. Ground pin current is the regulator quiescent current. The total current drawn from the supply is the sum of the load current plus the ground pin current.
August, 2004
4
M0385-080204
MICREL [ MICREL SEMICONDUCTOR ]
