MIC261203 Datasheet, PDF (5/31 Pages) Micrel Semiconductor – 28V, 12A Hyper Light Load™ Synchronous DC/DC Buck Regulator

Micrel, Inc.
MIC261203
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
Short-Circuit Protection
Current-Limit Threshold
V_FB = 0.8V, T_J = 25°C
18.75
26
Current-Limit Threshold
V_FB = 0.8V, T_J = 125°C
17.36
26
Short-Circuit Current
V_FB = 0V
6
Internal FETs
6
Top-MOSFET R_{DS (ON)}
I_SW = 3A
13
Bottom-MOSFET R_{DS (ON)}
I_SW = 3A
5.3
SW Leakage Current
V_EN = 0V
V_IN Leakage Current
Power Good
V_EN = 0V
PG Threshold Voltage
Sweep V_FB from Low to High
85
92
PG Hysteresis
Sweep V_FB from High to Low
5.5
PG Delay Time
Sweep V_FB from Low to High
100
PG Low Voltage
Sweep V_FB < 0.9 × V_NOM, I_PG = 1mA
70
Thermal Protection
Over-Temperature Shutdown
T_J Rising
160
Over-Temperature Shutdown
15
Hysteresis
Max. Units
ms
33
A
33
A
A
mΩ
mΩ
60
µA
25
µA
95
%V_OUT
%V_OUT
µs
200
mV
°C
°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