MIC38300 Datasheet, PDF (4/10 Pages) Micrel Semiconductor – 3A SuperLNR™ Low Noise High Efficiency Regulator

Micrel, Inc.
Absolute Maximum Ratings⁽¹⁾
Supply Voltage (V_IN) .........................................................6V
Output Switch Voltage (V_SW) ...........................................6V
Output Switch Current (I_SW) .............................................8A
LDO Output Voltage (V_OUT) .............................................6V
Logic Input Voltage (V_EN, V_LQ)..........................VIN to –0.3V
Power Dissipation .................................. Internally Limited⁽³⁾
Storage Temperature (T_S)...................–65°C ≤ T_J ≤ +150°C
ESD Rating⁽⁴⁾ ................................................................. 2kV
MIC38300
Operating Ratings⁽²⁾
Supply voltage (V_IN) ...................................... 3.0V to 5.5V
Junction Temperature Range ........ –40°C ≤ T_J ≤ +125°C
Enable Input Voltage (V_EN) ................................. 0V to V_IN
Package Thermal Resistance
4mm × 6mm MLF-28 (θ_JA) .............................40°C/W
Electrical Characteristics⁽⁵⁾
T_A = 25°C with V_IN = V_EN = 5V; V_EN = V_IN; I_OUT = 10mA, V_OUT = 1.8V. Bold values indicate –40°C ≤ T_J ≤ +125°C, unless noted.
Parameter
Conditions
Min Typ Max Units
Supply Voltage Range
3.0
5.5
V
Under-Voltage Lockout Threshold
Turn-on
2.75
V
UVLO Hysteresis
100
mV
LDO Quiescent Current
Turn-on Time
Shutdown Current
Feedback Voltage
I_OUT = 0A,
V_OUT to 5% of regulation, I I_LOAD = 3A
V_EN = 0V
±1%
±2.5%
1
mA
200 350 µs
35 50 µA
0.99 1 1.01 V
0.975 1 1.025 V
Feedback Current
1
µA
V_IN – V_O; Dropout Voltage
Current Limit
Output Voltage Load Regulation
Output Voltage Line Regulation
Output Ripple
I_LOAD = 3.0A
V_FB = 0.9×V_NOM
V_OUT = 1.8V, 10mA to 3A
V_OUT = 1.8V, V_IN from 3.0V to 5.5V
I_LOAD = 2A, C_OUTLDO = 20µF, C_OUTSW = 20µF
LPF=25kΩ
1.2
V
4.5 6
A
0.3 1
%
0.35 0.5 %/V
5
mV
Over-Temperature Shutdown
150
°C
Over-Temperature Shutdown
Hysteresis
20
°C
Enable Input
Enable Input Threshold
Regulator enable
0.90 1
1.1
V
Enable Hysteresis
20 120 200 mV
Enable Input Current
0.01
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. 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, 1.5k in series with 100pF.
5. Specification for packaged product only.
July 2007
4
M9999-070607
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