MIC2176 Datasheet, PDF (5/31 Pages) Micrel Semiconductor – Wide Input Voltage, Synchronous Buck

Micrel, Inc.
MIC2176
Electrical Characteristics⁽⁴⁾ (Continued)
V_IN = V_HSD = 48V, V_DD = 5V; V_BST – V_SW = 5V; T_A = 25°C, unless noted. Bold values indicate −40°C ≤ T_J ≤ +125°C.
Parameter
Condition
Min.
Typ.
Max.
Soft Start
Soft-Start time
6
Short Circuit Protection
Current-Limit Threshold
Short-Circuit Threshold
FET Drivers
V_FB = 0.8V
V_FB = 0V
103
130
162
19
48
77
DH, DL Output Low Voltage
DH, DL Output High Voltage
DH On-Resistance, High State
I_SINK = 10mA
I_SOURCE = 10mA
0.1
V_DD - 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
SW Leakage Current
V_SW = 48V, V_DD = 5V, V_BST = 53V
55
HSD Leakage Current
V_SW = 48V, V_DD = 5V, V_BST = 53V
55
Thermal Protection
Over-Temperature Shutdown
T_J Rising
160
Over-Temperature Shutdown Hysteresis
25
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5kΩ in series with 100pF.
3. The device is not guaranteed to function outside operating range.
4. Specification for packaged product only.
5. The application is fully functional at low V_DD (supply of the control section) if the external MOSFETs have enough low voltage V_TH.
6. Measured in test mode.
7. The maximum duty-cycle is limited by the fixed mandatory off-time t_OFF of typically 360ns.
Units
ms
mV
mV
V
V
Ω
Ω
Ω
Ω
µA
µA
°C
°C
November 2010
5
M9999-111710-A