MCP1790 Microchip Technology Inc., MCP1790 Datasheet - Page 16

• Manufacturer Part Number: MCP1790
• Description: 70 Ma, High Voltage Regulator
• Manufacturer: Microchip Technology Inc.

MCP1790/MCP1791
4.8
The MCP1790/MCP1791 devices are tested and
ensured to supply a minimum of 70 mA of output
current.
The MCP1790/MCP1791 also incorporate an output
current limit foldback. When the regulator is in an
overcurrent condition, V
ing load. When V
the output current will start to fold back. The output
current will fold back to less than 100 mA (typical) when
V
FIGURE 4-3:
DS22075A-page 16
OUT
is near 0 volts.
0.001
0.01
Output Current and Current
Limiting
0.1
10
1
0.1
OUT
Instable
falls below 30% (typical) of V
ESR Curves For Load Capacitor Selection.
OUT
will decrease with increas-
1
Stable
with Tantalum or
Electrolytic cap.
ESR Curves
Load Capacitor [uF]
only
R
,
10
The 5.0V regulator has an overload current limiting of
approximately 120 mA. If V
will start to fold back and decrease along with V
until I
The 3.3V regulator has an overload current limiting of
approximately 130 mA. If V
will start to fold back and decrease along with V
until I
Instable
Instable
OUT
OUT
is less than 105 mA and V
is less than 99 mA and V
Stable
Electrolytic and
Ceramic cap.
Tantalum,
with
100
© 2008 Microchip Technology Inc.
REG
REG
is lower than 3.5V, I
is lower than 2.5V, I
REG
REG
is near 0 volts.
is near 0 volts.
1000
OUT
REG
OUT
REG