a4403geu-t Allegro MicroSystems, Inc., a4403geu-t Datasheet - Page 4

• Manufacturer Part Number: a4403geu-t
• Description: Valley Current Mode Control Buck Converter
• Manufacturer: Allegro MicroSystems, Inc.

A4403
ELECTRICAL CHARACTERISTICS
1
2
include the feedback voltage tolerance.
Specifications over the junction temperature range of –40°C to 125°C are assured by design and characterization.
Average value of V
General
V
Feedback Voltage
Feedback Input Bias Current
Output Voltage Tolerance
On-Time Tolerance
Minimum On-Time Period
Minimum Off-Time Period
Buck Switch On-Resistance
Current Limit Threshold
Soft Start Current Source
Input
DIS Input Voltage Threshold
DIS Open-Circuit Voltage
DIS Input Current
Protection
FB Overvoltage Shutdown
VIN Undervoltage Shutdown Threshold
VIN Undervoltage Shutdown Hysteresis
Overtemperature Shutdown Threshold
Overtemperature Shutdown Hysteresis
IN
Quiescent Current
Characteristic
OUT
relative to target voltage. Note that the tolerance effects of the feedback resistors are not taken into account. This figure does
2
V
T
Symbol
1
I
T
T
R
V
∆V
JTSD(hys)
V
INUV(hys)
I
VINOFF
V
T
∆T
VINON
I
on(min)
off(min)
V
V
DS(on)
DISOC
valid at T
I
BIAS
FBOV
I
JTSD
I
INUV
LIM
SS
DIS
IN
FB
OUT
ON
DIS = high, VIN = 46 V
DIS = low, VIN = 46 V, I
T
I
Based on selected value
T
T
Valley current in external sense resistors = 50 mΩ
Device enabled
Device disabled
DIS = 0 V
Voltage rising
Temperature rising
Recovery = T
LOAD
J
J
J
J
= 25°C
= 25°C, I
= 125°C, I
= 25°C, V
Valley Current Mode Control Buck Converter
= 1 mA to 3 A
LOAD
LOAD
JTSD
IN
= 3 A
= 9 to 46 V, unless otherwise noted
= 3 A
– T
Conditions
JTSD(hys)
LOAD
= 1 mA
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
0.792
–400
Min.
–2.5
–15
–10
3.0
6.4
0.7
–
–
–
–
–
–
5
–
2
–
–
–
–100
Typ.
0.88
350
550
165
4.3
0.8
3.6
50
10
15
–
–
–
–
–
–
–
–
–
0.808
Max.
100
100
350
5.5
2.5
4.2
7.5
1.1
15
60
15
–1
–
–
1
7
–
–
–
Units
mΩ
mΩ
mA
μA
nA
μA
μA
ns
ns
°C
°C
%
%
V
A
V
V
V
V
V
4