MIC2124 Datasheet, PDF (4/24 Pages) Micrel Semiconductor – Constant Frequency, Synchronous Current Mode Buck Controller

Micrel, Inc.
MIC2124
Parameter
Conditions
Min
Typ Max Units
FET Drivers
DH, DL Output Low Voltage
DH, DL Output High Voltage
DH On-Resistance, High State
ISINK = 10mA
ISOURCE = 10mA, measured the difference
between VBST-VDH, VIN-VDL
0.1
V
0.1
V
2
3
Ω
DH On-Resistance, Low State
1.5
3
Ω
DL On-Resistance, High State
2
3
Ω
DL On-Resistance, Low State
1
2
Ω
LX, BST, HSD Leakage Current
Thermal Protection
TA = 25°C
30
µA
Over-temperature Shutdown
160
°C
Over-temperature Shutdown
Hysteresis
5
°C
Shutdown Control
EN/COMP Logic Level High
3V < VIN <5.5V
0.5
0.4
V
EN/COMP Logic Level Low
3V < VIN <5.5V
0.4
0.25
V
EN/COMP Hysteresis
EN/COMP Pull-up Current
3V < VIN <5.5V
VEN/COMP = 0V
26
mV
47
100
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 TA is PD(max) = (TJ(max)-TA) / θJA. 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.
6. The application is fully functional at low IN (supply of the control section) if the external MOSFETs have enough low voltage VTH.
June 2010
4
M9999-060810-D