A8499
A8499 is High Voltage Step-Down Regulator manufactured by Allegro MicroSystems.
FEATURES
AND BENEFITS
- 8 to 50 V input range
- Integrated DMOS switch
- Adjustable fixed off-time
- Highly efficient
- Adjustable 1.2 to 24 V output
High Voltage Step-Down Regulator
DESCRIPTION
The A8499 is a step down regulator that will handle a wide input operating voltage range. The A8499 is supplied in a low-profile 8-lead SOIC with exposed pad (package LJ). Applications include:
- Printer power supplies
- Consumer equipment power supplies
PACKAGE: 8-Lead SOIC with exposed thermal pad (suffix LJ)
Not to scale
Typical Application
CBOOT 0.01 µF
BOOT
RTSET
121 kΩ
TSET GND
LX VBIAS
D1
+42 V
C3 100 µF
50 V
C3 0.22 µF
L1 47 µH
R1 17.8 kΩ
R2 10.2 kΩ
VOUT 3.3 V / 1.2 A
COUT 220 µF 10 V
Efficiency %
90.0 88.0 86.0 84.0 82.0 80.0 78.0 76.0 74.0 72.0 70.0
Efficiency vs. Output Current
VOUT (V) 3.3...
