8186 Datasheet, PDF (2/8 Pages) Allegro MicroSystems – LOW-DROPOUT, 3.3 V REGULATOR . HIGH EFFICIENCY

8186
LOW-DROPOUT,
3.3 V REGULATOR
IN ⁴
FUNCTIONAL BLOCK DIAGRAM
6 OUT
ENABLE ³
BIAS
1 GND
DRIVE
ERROR
AMP
BANDGAP
REF.
2 SUB
5 SUB
SUB
Dwg. FS-012-3
Terminal numbering is in accordance with EIA/JEDEC convention.
Where EIAJ conventions apply, the tab is not numbered, resulting in
terminal 6 being designated terminal 5.
For proper operation, terminals 1 and 2 must be externally con-
nected together.
MAXIMUM ALLOWABLE OUTPUT CURRENT with device mounted on 2.24" x 2.24"
(56.9 mm x 56.9 mm) solder-coated copper-clad board in still air.
T_A
25°C
Maximum Allowable Output Current in Milliamperes with V_I = 8 V, T_J = 150°C, Period ≤10 s*
dc (Duty Cycle)
100%
90%
80%
70%
60%
50%
40%
30%
100
115
125
145
150
150
150
150
20%
150
50°C
80
90
100
115
135
150
150
150
150
70°C
65
70
80
90
110
130
150
150
150
85°C
50
60
65
75
85
105
130
150
150
* I_O = (T_J - T_A)/([V_I - V_O] R_θJA • dc) = (150 - T_A)/(4.7 • 258 • dc)
Output current rating can be increased (to 150 mA maximum) by heat sinking or reducing the input voltage. Conditions that produce excessive
junction temperature will activate device thermal shutdown circuitry. These conditions can be tolerated but should be avoided.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]
Copyright © 1995 Allegro MicroSystems, Inc.