MIC5253 Micrel
Electrical Characteristics
(5)
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 otherwise noted.
Symbol Parameter Conditions Min Typical Max Units
V
O
Output Voltage Accuracy I
OUT
= 100µA –1.5 1.5 %
–33%
∆V
LNR
Line Regulation V
IN
= V
OUT
+ 1V to 6V 0.035 0.05 %/V
∆V
LDR
Load Regulation I
OUT
= 0.1mA to 100mA, Note 6 1.5 2.5 %
V
IN
– V
OUT
Dropout Voltage
(7)
I
OUT
= 50mA 80 150 mV
I
OUT
= 100mA 165 300 mV
I
Q
Quiescent Current V
EN
≤ 0.4V (shutdown) 0.2 1 µA
I
GND
Ground Pin Current
(8)
I
OUT
= 0mA 75 100 µA
I
OUT
= 100mA 90 150 µA
PSRR Ripple Rejection f = 100Hz, C
OUT
= 1.0µF, C
BYP
= 0.1µF66dB
f = 1kHz, V
IN
= V
OUT
+1, C
BYP
= 0.1µF70dB
f = 10kHz, V
IN
= V
OUT
+1, C
BYP
= 0.1µF65dB
t
ON
Turn-On Time 30 150 µs
I
LIM
Current Limit V
OUT
= 0V 150 250 450 mA
e
n
Output Voltage Noise C
OUT
= 1.0µF, C
BYP
= 0.01µF, 30
µV(rms)
f = 10Hz to 100kHz
Enable Input
V
IL
Enable Input Logic-Low Voltage V
IN
= 2.7V to 5.5V, regulator shutdown 0.4 V
V
IH
Enable Input Logic-High Voltage V
IN
= 2.7V to 5.5V, regulator enabled 1.6 V
I
EN
Enable Input Current V
IL
≤ 0.4V, regulator shutdown 0.01 µA
V
IH
≥ 1.6V, regulator enabled 0.01 µA
Thermal Protection
Thermal Shutdown Temperature 150 °C
Thermal Shutdown Hysteresis 10 °C
Notes:
1. Exceeding the absolute maximum ratings may damage the device.
2. The device is not guaranteed to function outside its operating ratings.
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 MIC5253-x.xBC5 (all versions) is
400°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 100mA. 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 differential.
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.
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 ............................... –65°C to +150°C
Lead Temperature (soldering, 5 sec.) ....................... 260°C
ESD Rating
(4)
................................................................................
2kV
Operating Ratings
(2)
Input Voltage (V
IN
) ...................................... +2.7V to +5.5V
Enable Input Voltage (V
EN
) .................................. 0V to V
IN
Junction Temperature (T
J
) .......................–40°C to +125°C
Thermal Resistance
SC-70-5 (θ
JA
) ....................................................400°C/W
M9999-112305
November 2005 3
