A4402 ALLEGRO [Allegro MicroSystems], A4402 Datasheet - Page 5

• Manufacturer Part Number: A4402
• Description: Constant On-Time Buck Converter with Integrated Linear Regulator
• Manufacturer: ALLEGRO [Allegro MicroSystems]

A4402
1
2
For input and output current specifications, negative current is defined as coming out of (sourcing) the specified pin.
Performance in the range –40°C to 85°C guaranteed by design and characterization.
ELECTRICAL CHARACTERISTICS
Protection Circuitry
NPOR Output Voltage
NPOR Leakage Current
NPOR Reset
Thermal Shutdown Threshold
Thermal Shutdown Hysteresis
Timing Circuitry
TSET Current, Watchdog Mode
TSET Valley Voltage, Watchdog
Mode
TSET Reset Voltage, Watchdog
Mode
WDI Frequency
WDI Duty Cycle
WDI Logic Input
WDI Logic Input Current
WDI Input Hysteresis
TSET Current, Soft Start Mode
POR Current
Characteristics
V
NPORRESET
T
Symbol
I
V
V
I
TSETWDI
V
V
DC
JTSDHYS
TSETSS
I
T
V
WDIHYS
NPOR
RESET
I
f
WDI(0)
I
NPOR
POR
JTSD
WDI
WDI
TRIP
WDI
1,2
(continued) valid at T
I
V
20 kΩ pullup connected to VOUT2, V
T
NPOR = high
V
NPOR = low
NPOR
NPOR
J
WDI
rising
= 0 to 5 V
= 1 mA
= 5 V
Test Conditions
Constant On-Time Buck Converter
J
= 25°C, V
with Integrated Linear Regulator
IN
= 13.5 V (unless otherwise noted)
IN
<
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
V
Min.
0.55
3.92
–20
IN2
10
14
–
–
–
–
–
7
–
–
–
–
×
< 1.0
Typ.
0.48
5.60
170
300
1.2
15
10
20
–
–
–
–
–
–
Max.
7.28
400
100
0.7
14
90
20
26
1
–
–
–
–
–
–
Units
kHz
mV
mV
μA
ºC
ºC
μA
μA
μA
μA
%
V
V
V
V
5