MIC24051 Datasheet, PDF (4/34 Pages) Micrel Semiconductor – 12V, 6A High-Efficiency Buck Regulator

MIC24051
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 (V_IN, PV_IN)
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
(V_OUT)
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
Soft-Start
Soft-Start Time
—
4.5
—
19
V
—
—
—
730 1500 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
—
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
V
–40°C ≤ T_J ≤ +125°C (±1.5%)
—
—
0.25
—
%
I_OUT = 0A 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
—
—
—
3
—
ms
—
Short-Circuit Protection
Peak Inductor Current-Limit
Threshold
Short-Circuit Current
7.5
11
17
—
A
6.6
11
17
—
—
8
—
A
V_FB = 0.8V, T_J = 25°C
V_FB = 0.8V, T_J = 125°C
V_FB = 0V
Internal FETs
Note 1:
2:
3:
Specification for packaged product only.
Measured in test mode.
The maximum duty-cycle is limited by the fixed mandatory off-time (t_OFF) of typically 300 ns.
DS20005658A-page 4
 2016 Microchip Technology Inc.