MIC24053 Datasheet, PDF (5/30 Pages) Micrel Semiconductor – 12V, 9A High-Efficiency Buck Regulator

Micrel, Inc.
MIC24053
Electrical Characteristics⁽⁵⁾ (Continued)
PVIN = VIN = VEN = 12V, VBST – VSW = 5V; TA = 25°C, unless noted. Bold values indicate -40°C ≤ TJ ≤ +125°C.
Parameter
Condition
Min.
Typ.
Soft-Start
Soft-Start Time
3
Max.
Units
ms
Short-Circuit Protection
Peak Inductor Current-Limit Threshold VFB = 0.8V, TJ = 25°C
12.5
14
20
A
Short-Circuit Current
Internal FETs
VFB = 0.8V, TJ = 125°C
VFB = 0V
11.25
14
20
A
8
A
Top-MOSFET RDS (ON)
Bottom-MOSFET RDS (ON)
SW Leakage Current
VIN Leakage Current
Power Good (PG)
ISW = 3A
ISW = 3A
VEN = 0V
VEN = 0V
27
mΩ
10.5
mΩ
60
µA
25
µA
PG Threshold Voltage
PG Hysteresis
PG Delay Time
PG Low Voltage
Thermal Protection
Sweep VFB from Low to High
Sweep VFB from High to Low
Sweep VFB from Low to High
Sweep VFB < 0.9 × VNOM, IPG = 1mA
85
92
95
%VOUT
5.5
%VOUT
100
µs
70
200
mV
Overtemperature Shutdown
TJ Rising
160
°C
Overtemperature Shutdown
Hysteresis
15
°C
Notes:
1. Exceeding the absolute maximum rating can damage the device.
2. Devices are ESD sensitive. Handling precautions are recommended. Human body model, 1.5kΩ in series with 100pF.
3. The device is not guaranteed to function outside its operating range.
4. PD(MAX) = (TJ(MAX) – TA)/θJA, where θJA depends on the printed circuit layout. A 5in², 4-layer, 0.62”, FR-4 PCB with 2oz finish copper weight per layer is
used for the θJA.
5. Specification for packaged product only.
6. Measured in test mode.
7. The maximum duty-cycle is limited by the fixed mandatory off-time (tOFF) of typically 300ns.
November 2012
5
M9999-110712-A