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A8498 Fiches technique(PDF) 1 Page - Allegro MicroSystems

No de pièce A8498
Description  Wide Input Voltage 3.0 A Step Down Regulator
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Fabricant  ALLEGRO [Allegro MicroSystems]
Site Internet  http://www.allegromicro.com
Logo ALLEGRO - Allegro MicroSystems

A8498 Fiches technique(HTML) 1 Page - Allegro MicroSystems

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VIN
LX
BOOT
ENB
TSET
GND
VBIAS
FB
+42
V
220 μF
25 V
ESR
VOUT
COUT
3.3 V / 3 A
6.34 k
R1
L1
D1
R2
2 k
0.22 μF
0.01 μF
CBOOT
CIN2
CIN1
RTSET
63.4 k
68 μH
220 μF
50 V
A8498
Efficiency vs. Output Current
70.0
72.0
74.0
76.0
78.0
80.0
82.0
84.0
86.0
88.0
90.0
0
500
1000
1500
2000
2500
3000
IOUT (mA)
VOUT (V)
5
3.3
Circuit for 42 V step down to 3.3 V at 3 A. Efficiency data from circuit shown in left panel. Data is for reference only.
Approximate Scale 1:1
A8498
Description
The A8498 is a step down regulator that will handle a wide
input operating voltage range.
The A8498 is supplied in a low-profile 8-lead SOIC with
exposed pad (package LJ). Applications include:
▪ Applications with 8 to 50 V input voltage range needing
buck regulator for 3.0 A output current
▪ Consumer equipment power
▪ Uninterruptible power supplies (lead acid battery
charger)
▪ Automotive telematics: 9 to 16 V input, with higher
voltage protection
▪ 12 V lighter-powered applications (portable DVD, etc.)
▪ Point of Sale (POS) applications
▪ Industrial applications with 24 or 36 V bus
A8498-DS, Rev. 2
Features and Benefits
▪ 8 to 50 V input range
▪ Integrated DMOS switch
▪ Adjustable fixed off-time
▪ Highly efficient
▪ Adjustable 0.8 to 24 V output
Wide Input Voltage 3.0 A Step Down Regulator
Typical Application
Package: 8-Lead SOIC with exposed
thermal pad (suffix LJ)


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