MIC24045 Datasheet, PDF (4/46 Pages) Microchip Technology – I2C Programmable, 4.5V-19V Input, 5A Step-Down Converter

MIC24045
ELECTRICAL CHARACTERISTICS (Note 1)
Electrical Specifications: unless otherwise specified, V_IN = V_INLDO = 12V; C_VDDA = 2.2 µF, C_VDDP = 2.2 µF, T_A = +25°C.
Boldface values indicate -40°C  T_J  +125°C.
Parameter
Symbol
Min.
Typ.
Max. Units
Test Conditions
V_IN Supply
Input Range
Disable Current
Disable Current
Operating Current
Operating Current
V_IN
4.5
I_VINQ
—
I_VINLDOQ
—
I_VINOp
—
I_VINLDOOp
—
V_DDA 5V Supply
Operating Voltage
Dropout Operation
V_DDA Undervoltage Lockout
V_DDA UVLO Rising
V_DDA UVLO Falling
V_DDA UVLO Hysteresis
EN Control
EN Rising Threshold
EN Falling Threshold
EN Hysteresis
EN Pull-Down Current
Switching Frequency
Programmable Frequency 0
Programmable Frequency 1
Programmable Frequency 2
Programmable Frequency 3
Programmable Frequency 4
Programmable Frequency 5
Programmable Frequency 6
Programmable Frequency 7
Overcurrent Protection
HS Current Limit 0
HS Current Limit 1
HS Current Limit 2
HS Current Limit 3
High Side FET Current-Limit
Leading Edge-Blanking Time
V_DDA
UVLO_R
UVLO_F
UVLO_H
EN_R
EN_F
EN_H
EN_I
f_s0
f_s1
f_s2
f_s3
f_s4
f_s5
f_s6
f_s7
I_{LIM_HS0}
I_{LIM_HS1}
I_{LIM_HS2}
I_{LIM_HS3}
LEB
4.8
3.6
3.1
2.87
—
1.14
—
—
1
270
350
450
510
590
680
850
1050
4.0
5.4
7.6
8.2
—
—
0.2
0.6
0.3
4.5
5.1
4.2
3.5
3.2
300
1.21
1.07
135
2
310
400
500
570
660
780
970
1200
4.7
6.2
8.6
9.4
108
19
2
1
0.5
7
5.4
—
3.9
3.45
—
V
µA EN = 0V
mA EN = 0V
mA EN > 1.28V, ILIM<1:0> = 00,
OUTSNS = 1.15 x V_OUT(NOM),
no switching, T_A = T_J = +25°C
mA EN > 1.28V,
OUTSNS = 1.15 x V_OUT(NOM),
no switching, T_A = T_J = +25°C
V I_VDDA = 0 mA to 10 mA
V V_INLDO = 4.5V, I_VDDA = 10 mA
V V_DDA Rising, EN > 1.28V
V V_DDA Falling, EN > 1.28V
mV
1.28
—
—
3
350
450
550
630
740
880
1100
1350
V Initiates power-stage operation
V Stops power-stage operation
mV
µA T_A = T_J = +25°C
kHz
kHz
kHz
kHz
kHz
kHz
kHz
kHz
6.5
A
7.6
A
10.6
A
12.0
A
—
ns
LS Current Limit 0
I_{LIM_LS0}
2.0
3.25
5.0
A
LS Current Limit 1
I_{LIM_LS1}
3.0
4.3
6.0
A
LS Current Limit 2
I_{LIM_LS2}
4.0
5.6
7.5
A
Note 1: Specification for packaged product only.
DS20005568A-page 4
 2016 Microchip Technology Inc.