MCP2021/2
1.6.2
3.3V REGULATOR
Note:
The regulator has an overload current
limiting of approximately 100 mA. If VREG
is lower than 2.5V, the VREG will turn off.
A metal option provides for a alternate 3.30 VDC ±3%
at up to 50 mA of load current over the entire operating
temperature range of -40°C to +125°C. All
specifications given above for the 5.0V operation apply
except for any difference noted here.
The same input tracking of 4.25V applies the 3.3V
regulator.
FIGURE 1-5:
VOLTAGE REGULATOR OUTPUT ON POWER-ON RESET
VBB
V
8
6
4
2
0
t
VREG
V
5.0
3.5
3
0
t
(1)
(2)
(3)
Note 1: Start-up, VBB < 5.75V, regulator off.
2: VBB > 5.75V, regulator on.
3: VBB ≤ 5.5V, regulator tracks VBB
4: VBB < 4.25V, regulator will turn off
© 2009 Microchip Technology Inc.
DS22018E-page 11
MICROCHIP [ MICROCHIP ]
