MIC28511 Datasheet, PDF (4/34 Pages) Microchip Technology – 60VIN, 3A Synchronous Buck Regulator

MIC28511
TABLE 1-1: ELECTRICAL CHARACTERISTICS
Electrical Characteristics: V_IN = 12V, T_A = 25°C, unless noted. Bold values indicate –40°C ≤ T_J ≤ +125°C.
(Note 1).
Parameters
Min.
Typ.
Max.
Units
Conditions
Power Supply Input
Input Voltage Range (PV_IN,
V_IN)
Quiescent Supply Current
Shutdown Supply Current
V_DD Supply
V_DD Output Voltage
V_DD UVLO Threshold
V_DD UVLO Hysteresis
Load Regulation at 40 mA
4.6
—
60
—
0.4
0.75
—
0.7
1.5
—
0.1
10
4.8
5.2
5.4
3.8
4.2
4.6
—
400
—
0.6
2
4.0
V—
mA V_FB = 1.5V (MIC28511-1)
V_FB = 1.5V (MIC28511-2)
µA SW unconnected, V_EN = 0V
V
V_IN = 7V to 60V, I_VDD = 10 mA
V
V_DD rising
mV —
%—
Reference
Feedback Reference Voltage
0.792
0.8
0.784
0.8
FB Bias Current
—
5
Enable Control
EN Logic Level High
EN Logic Level Low
EN Hysteresis
EN Bias Current
1.8
—
—
—
—
200
—
5
Oscillator
Switching Frequency
Maximum Duty Cycle
Minimum Duty Cycle
Minimum Off-Time
450
680
—
340
—
85
—
0
110
200
Internal MOSFET
High-Side NMOS
On-Resistance
Low-Side NMOS
On-Resistance
—
51
—
28
0.808
0.816
500
—
0.6
—
40
800
—
—
—
270
—
—
V
0°C ≤ T_J ≤ +85°C (±1.0%)
–40°C ≤ T_J ≤ +125°C (±2%)
nA V_FB = 0.8V
V
—
—
mV —
µA V_EN = 12V
kHz V_FREQ = V_IN
V_FREQ = 50% x V_IN
%—
V_FB > 0.8V
ns —
mΩ —
—
Short-Circuit Protection
Current-Limit Threshold
–30
–14
0
Short-Circuit Threshold
–27
–7
8
Current-Limit Source Current
50
70
90
Short-Circuit Source Current
25
36
43
Note 1: Specification for packaged product only.
mV V_FB = 0.79V
V_FB = 0V
µA V_FB = 0.79V
V_FB = 0V
DS20005520A-page 4
 2016 Microchip Technology Inc.