A4402 ALLEGRO [Allegro MicroSystems], A4402 Datasheet - Page 2

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

A4402
Selection Guide
Absolute Maximum Ratings
Thermal Characteristics
Package Thermal Resistance
*Additional thermal information available on the Allegro website.
VIN1 Pin
VIN2 Pin
LX Pin
ISEN Pin
ENB Pin
VO2 Pin
WDI Pin
TON Pin
FB1 and FB2 Pins
NPOR
Ambient Operating Temperature
Junction Temperature
Storage Temperature Range
A4402ELPTR-T
NPOR
TSET
GND
VIN2
Part Number
TON
VO2
WDI
FB2
Characteristic
Pin-out Diagram
Characteristic
1
2
3
4
5
6
7
8
PAD
16
15
14
13
12
11
10
9
ENB
VIN1
GND
LX
BOOT
ISEN
POR
FB1
4000 pieces per 13-in. reel
Symbol
Symbol
Packing
V
T
R
V
V
V
V
V
V
V
V
V
NPOR
j(max)
T
θJA
ISEN
T
ENB
TON
WDI
FBx
IN1
IN2
stg
LX
O2
A
Terminal List Table
Number
On 4-layer PCB based on JEDEC standard
Range E
10
12
13
14
15
16
11
1
2
3
4
5
6
7
8
9
–
NPOR
BOOT
Name
TSET
ISEN
GND
VIN2
POR
GND
VIN1
TON
VO2
ENB
PAD
FB2
WDI
FB1
LX
16-pin TSSOP with exposed thermal pad
Constant On-Time Buck Converter
On time setting terminal
Ground
Feedback for V
Input voltage 2
Regulator 2 output
Watchdog input
Soft start and watchdog timing capacitor terminal
Fault output
Feedback for V
POR delay
Current sense, limit setting for switching regulator, connect to GND
through series resistor
Boot node for LX
Switching regulator output
Ground
Input voltage 1
Enable input
Exposed thermal pad
with Integrated Linear Regulator
Notes
Test Conditions*
Package
LIN
SW
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
Function
–0.3 to 6.5
–40 to 150
–0.3 to 50
–40 to 85
–0.3 to 7
–0.5 to 1
–0.3 to 7
–0.3 to 7
–0.3 to 6
–0.3 to 7
–0.3 to 7
–1 to 50
Rating
150
Units
°C
°C
°C
V
V
V
V
V
V
V
V
V
V
Value Units
34
ºC/W
2