MIC47300 Datasheet, PDF (3/11 Pages) Micrel Semiconductor – 3A, Low Voltage, Adjustable LDO Regulator with Dual Input Supply

Micrel, Inc.
MIC47300
Absolute Maximum Ratings⁽¹⁾
Supply Voltage (V_IN) .........................................................8V
Bias Supply Voltage (V_BIAS)..............................................8V
Power Dissipation .....................................Internally Limited
ESD Rating⁽³⁾.................................................................. 2kV
Operating Ratings⁽²⁾
Supply Voltage (V_IN)......................................... 1.4V to 6.5V
Bias Supply Voltage (V_BIAS)................................. 3V to 6.5V
Junction Temperature (T_J) ..................–40°C ≤ T_J ≤ +125°C
Maximum Power Dissipation..................................... Note 4
Package Thermal Resistance
TO-252 (θ_JC) ........................................................3°C/W
TO-252 (θ_JA).......................................................56°C/W
Electrical Characteristics⁽⁵⁾
V_IN = V_OUT + 1V, V_BIAS = V_OUT + 2.1V, I_OUT = 10mA; T_A = 25°C, bold values indicate –40°C≤ T_J ≤ +125°C, unless noted.
Symbol Parameter
Condition
Min Typ Max Units
V_LNREG Line Regulation
V_IN = V_OUT +1V to 6.5V
–0.1 0.01 +0.1
%/V
V_LDREG Load Regulation
I_OUT = 10mA to A
0.2
0.5
%
V_DO
Dropout Voltage (V_IN -V_OUT)
I_OUT = 1.5A
I_OUT = 3A
105
200
mV
230
400
mV
V_DO(BIAS) Dropout Voltage (V_BIAS - V_OUT)
Note 6
I_OUT = 3A
1.24
2.1
V
I_GND
Ground Pin Current, Note 7
I_OUT = 10mA
I_OUT = 3A
25
mA
25
50
mA
I_BIAS
Current thru V_BIAS
I_OUT = 10mA
I_OUT = 3A
20
35
mA
50
150
mA
I_LIM
Current Limit
V_OUT = 0V
6.5
10
A
T_SD
Thermal Shutdown
Thermal Shutdown Hysteresis
168
°C
10
°C
Reference (Adjust Pin)
V_ADJ
Reference Voltage
0.891 0.9 0.909
V
0.882
0.918
V
I_ADJ
Adjust Pin Current
V_ADJ = 1.2V
0.01
1
μA
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5kΩ in series with 100pF.
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. For V_OUT ≤1V, V_BIAS dropout specification does not apply due to a minimum 3V V_BIAS input.
7. I_GND = I_BIAS + (I_IN – I_OUT). At high loads, input current on V_IN will be less than the output current, due to drive current being supplied by V_BIAS.
October 2009
3
M9999-102309-A