MIC24052 Datasheet, PDF (4/34 Pages) Micrel Semiconductor – 12V, 6A High-Efficiency Buck Regulator

MIC24052
TABLE 1-1: ELECTRICAL CHARACTERISTICS
Electrical Characteristics: 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. (Note 1).
Parameters
Sym. Min. Typ. Max. Units
Conditions
Power Supply Input
Input Voltage Range
Quiescent Supply Current
Shutdown Supply Current
V_DD Supply Voltage
V_DD Output Voltage
V_DD UVLO Threshold
V_DD UVLO Hysteresis
Dropout Voltage (V_IN – V_DD)
DC/DC Controller
Output Voltage Adjust Range
Reference
Feedback Reference Voltage
Load Regulation
Line Regulation
FB Bias Current
Enable Control
EN Logic Level High
EN Logic Level Low
EN Bias Current
Oscillator
Switching Frequency (Note 2)
Maximum Duty Cycle (Note 3)
Minimum Duty Cycle
Minimum Off-Time
V_IN, PV_IN 4.5
—
19
V
—
—
—
450 750
µA
V_FB = 1.5V (non-switching)
—
—
5
10
µA
V_EN = 0V
—
4.8
5
5.4
V
V_IN = 7V to 19V, I_DD = 40 mA
—
3.7
4.2
4.5
V
V_DD Rising
—
—
400
—
mV
—
—
—
380 600 mV
I_DD = 25 mA
V_OUT
0.8
—
5.5
V
—
0.792 0.8 0.808
—
V
0°C ≤ T_J ≤ 85°C (±1.0%)
0.788 0.8 0.812
–40°C ≤ T_J ≤ 125°C (±1.5%)
—
—
0.25
—
%
I_OUT = 1A to 6A (Continuous
Mode)
—
—
0.25
—
%
—
—
50
500
nA
V_IN = 4.5V to 19V
V_FB = 0.8V
—
1.8
—
—
V
—
—
—
0.6
V
—
—
6
30
µA
—
—
V_EN = 12V
—
450 600 750 kHz
—
—
82
—
%
—
—
0
—
%
—
—
300
—
ns
V_OUT = 2.5V
V_FB = 0V
V_FB = 1.0V
—
Soft-Start
Soft-Start Time
—
—
3
—
ms
—
Short-Circuit Protection
Peak Inductor Current-Limit
Threshold
—
7.5
11
17
A
V_FB = 0.8V, T_J = 25°C
Peak Inductor Current-Limit
Threshold
—
6.6
11
17
A
V_FB = 0.8V, T_J = 125°C
Short-Circuit Current
—
—
8
—
A
V_FB = 0V
Note 1: Specification for packaged product only.
2: Measured in test mode.
3: The maximum duty-cycle is limited by the fixed mandatory off-time (t_OFF) of typically 300 ns.
DS20005659A-page 4
 2016 Microchip Technology Inc.