Micrel, Inc. MIC5357
January 2011 4
M9999-011311
Absolute Maximum Ratings
(1)
Supply Voltage (V
IN
)........................................ −0.3V to +6V
Enable Input Voltage (V
EN1
, V
EN2
).....................−0.3V to V
IN
Power Dissipation ..................................Internally Limited
(3)
Lead Temperature (soldering, 3sec).......................... 260°C
Storage Temperature (T
S
).........................−65°C to +150°C
ESD Rating
(4)
................................................................. 2kV
Operating Ratings
(2)
Supply Voltage (V
IN
)..................................... +2.6V to +5.5V
Enable Input Voltage (V
EN1
, V
EN2
) .......................... 0V to V
IN
Junction Temperature ............................... –40°C to +125°C
Junction Thermal Resistance
8-Pin ePAD MSOP (θ
JA
) .................................64.4°C/W
Electrical Characteristics
(5)
V
IN
= V
EN1
= V
EN2
= V
OUT
+ 1.0V; higher of the two regulator outputs, I
OUTLDO1
= I
OUTLDO2
= 100µA; C
OUT1
= C
OUT2
= 2.2µF; C
BYP
= 0.1µF;
T
J
= 25°C, bold values indicate –40°C ≤ T
J
≤ +125°C, unless noted.
Parameter Conditions Min. Typ. Max. Units
Variation from nominal V
OUT
-2.0 +2.0
Output Voltage Accuracy
Variation from nominal V
OUT
; –40°C to +125°C
-3.0
+3.0
%
Line Regulation V
IN
= V
OUT
+ 1V to 5.5V; I
OUT
= 100µA 0.05
0.3
0.6
%/V
Load Regulation I
OUT1&2
=100µA to 500mA 0.7
2.5
%
Dropout Voltage
(6)
I
OUT1,2
= 100µA
I
OUT1,2
= 50mA
I
OUT1,2
= 500mA
0.1
12
130
50
300
mV
Ground Current
V
EN1
≥ 1.2V; V
EN2
≤ 0.2V; I
OUT
= 0mA to 500mA
V
EN1
≤ 0.2V; V
EN2
≥ 1.2V; I
OUT2
= 0mA to 500mA
V
EN1
= V
EN2
≥ 1.2V; I
OUT1
= 500mA, I
OUT2
= 500mA
95
95
160
175
175
240
µA
Ground Current in Shutdown V
EN1
= V
EN2
= 0V 0.01 2 µA
Ripple Rejection
f = 1kHz; C
OUT
= 2.2µF; C
BYP
= 0.1µF
f = 20kHz; C
OUT
= 2.2µF; C
BYP
= 0.1µF
70
45
dB
V
OUT1
= 0V
550
950
1300
Current Limit
V
OUT2
= 0V
550
950
1300
mA
Output Voltage Noise C
OUT
= 2.2µF; C
BYP
= 0.1µF; 10Hz to 100kHz
51
µV
RMS
Enable Inputs (EN1 / EN2)
Logic Low
0.2
Enable Input Voltage
Logic High
1.2
V
V
IL
≤ 0.2V 0.01
Enable Input Current
V
IH
≥ 1.2V 0.01
µA
Turn-on Time (See Timing Diagram)
Turn-on Time (LDO1 and 2) C
OUT
= 2.2µF; C
BYP
= 0.1µF 38
100
µs
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.
4. Devices are ESD sensitive. Handling precautions recommended. Human body model 1.5kΩ in series with 100pF.
5. Specification for packaged product only.
6. Dropout voltage is defined as the input-to-output differential at which the output voltage drops 2% below its nominal V
OUT
. For outputs below
2.6V, the dropout voltage is the input-to-output differential with the minimum input voltage 2.6V.
