MIC261201 Datasheet, PDF (5/30 Pages) Micrel Semiconductor – 28V, 12A Hyper Speed Control™ Synchronous DC/DC Buck Regulator

Micrel, Inc.
MIC261201
Electrical Characteristics⁽⁵⁾ (Continued)
PV_IN = V_IN = V_EN = 12V, V_BST – V_SW = 5V; T_A = 25°C, unless noted. Bold values indicate –40°C ≤ T_J ≤ +125°C.
Parameter
Condition
Min.
Typ.
Soft-Start
Soft-Start time
5
Max.
Units
ms
Short-Circuit Protection
Current-Limit Threshold
Current-Limit Threshold
Short-Circuit Current
Internal FETs
V_FB = 0.8V, T_J = 25°C
V_FB = 0.8V, T_J = 125°C
V_FB = 0V
18.75
26
33
A
17.36
26
33
A
6
A
Top-MOSFET R_{DS (ON)}
Bottom-MOSFET R_{DS (ON)}
SW Leakage Current
V_IN Leakage Current
Power Good (PG)
I_SW = 3A
I_SW = 3A
V_EN = 0V
V_EN = 0V
13
mΩ
5.3
mΩ
60
µA
25
µA
PG Threshold Voltage
PG Hysteresis
PG Delay Time
PG Low Voltage
Thermal Protection
Sweep V_FB from Low to High
Sweep V_FB from High to Low
Sweep V_FB from Low to High
Sweep V_FB < 0.9 × V_NOM, I_PG = 1mA
85
92
95
%V_OUT
5.5
%V_OUT
100
µs
70
200
mV
Over-Temperature Shutdown
Over-Temperature Shutdown
Hysteresis
T_J Rising
160
°C
15
°C
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. PD_(MAX) = (T_J(MAX) – T_A)/ θ_JA, where θ_JA depends upon the printed circuit layout. A 5 square inch 4 layer, 0.62”, FR-4 PCB with 2oz finish copper weight
per layer is used for the θ_JA.
5. Specification for packaged product only.
6. Measured in test mode.
7. The maximum duty-cycle is limited by the fixed mandatory off-time t_OFF of typically 300ns.
July 2011
5
M9999-071311-A