MIC2164_10 Datasheet, PDF (5/39 Pages) Micrel Semiconductor – Synchronous Buck Controllers Featuring Adaptive On-Time Control 28V Input, Constant Frequency

Micrel, Inc.
MIC2164/-2/-3/C
Electrical Characteristics⁽⁴⁾ (Continued)
V_BST − V_LX = 5V; T_A = +25°C, unless noted. Bold values indicate −40°C ≤ T_J ≤ +125°C.
Parameter
Condition
Min.
Typ. Max.
MIC2164/ MIC2164C
87
Maximum Duty Cycle ⁽⁹⁾
MIC2164-2
74
MIC2164-3
66
Minimum Duty Cycle
Measured at DH, V_FB = 1V
0
FET Drives
DH, DL Output Low Voltage
DH, DL Output High Voltage
DH On-Resistance, High State
I_SINK = 10mA
I_SOURCE = 10mA
0.1
V_IN − 0.1V
or
V_BST − 0.1V
2.1
3.3
DH On-Resistance, Low State
1.8
3.3
DL On-Resistance, High State
1.8
3.3
DL On-Resistance, Low State
1.2
2.3
LX Leakage Current
V_LX = 28V, V_IN = 5.5V,V_BST = 33.5V
50
HSD Leakage Current
V_LX = 28V, V_IN = 5.5V,V_BST = 33.5V
20
Thermal Protection
Over-Temperature Shutdown
155
Over-Temperature Shutdown
Hysteresis
10
Shutdown Control
EN Logic Level Low
EN Logic Level High
EN Pull-Up Current
3V < V_IN <5.5V
3V < V_IN <5.5V
0.4
0.8
0.9
1.2
50
Note:
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, 1.5k in series with 100pF.
4. Specification for packaged product only.
5. The application is fully functional at low IN (supply of the control section) if the external MOSFETs have enough low voltage V_TH.
6. The current will come only from the internal 100kΩ pull-up resistor sitting on the EN Input and tied to IN.
8. Measured in test mode.
9. Measured at DH. The maximum duty cycle is limited by the fixed mandatory off time T_OFF of typical 363ns.
Units
%
%
V
V
Ω
Ω
Ω
Ω
µA
µA
°C
°C
V
V
µA
September 2010
5
M9999-091310-D