MCP1825/MCP1825S
500 mA, Low Voltage, Low Quiescent Current LDO Regulator
Features Description
500 mA Output Current Capability The MCP1825/MCP1825S is a 500 mA Low Dropout
(LDO) linear regulator that provides high current and
Input Operating Voltage Range: 2.1V to 6.0V
low output voltages. The MCP1825 comes in a fixed or
Adjustable Output Voltage Range: 0.8V to 5.0V
adjustable output voltage version, with an output
(MCP1825 only)
voltage range of 0.8V to 5.0V. The 500 mA output
Standard Fixed Output Voltages:
current capability, combined with the low output voltage
- 0.8V, 1.2V, 1.8V, 2.5V, 3.0V, 3.3V, 5.0V
capability, make the MCP1825 a good choice for new
Other Fixed Output Voltage Options Available
sub-1.8V output voltage LDO applications that have
Upon Request high current demands. The MCP1825S is a 3-pin fixed
Low Dropout Voltage: 210 mV Typical at 500 mA voltage version.
Typical Output Voltage Tolerance: 0.5%
The MCP1825/MCP1825S is stable using ceramic
output capacitors that inherently provide lower output
Stable with 1.0 F Ceramic Output Capacitor
noise and reduce the size and cost of the entire
Fast response to Load Transients
regulator solution. Only 1 F of output capacitance is
Low Supply Current: 120 A (typical)
needed to stabilize the LDO.
Low Shutdown Supply Current: 0.1 A (typical)
Using CMOS construction, the quiescent current
(MCP1825 only)
consumed by the MCP1825/MCP1825S is typically
Fixed Delay on Power Good Output
less than 120 A over the entire input voltage range,
(MCP1825 only)
making it attractive for portable computing applications
Short Circuit Current Limiting and
that demand high output current. The MCP1825
Overtemperature Protection
versions have a Shutdown (SHDN) pin. When shut
TO-263-5 (DDPAK-5), TO-220-5, SOT-223-5
down, the quiescent current is reduced to less than
Package Options (MCP1825).
0.1 A.
TO-263-3 (DDPAK-3), TO-220-3, SOT-223-3
On the MCP1825 fixed output versions, the scaled-
Package Options (MCP1825S).
down output voltage is internally monitored and a
power good (PWRGD) output is provided when the
Applications
output is within 92% of regulation (typical). The
PWRGD delay is internally fixed at 110 s (typical).
High-Speed Driver Chipset Power
The overtemperature and short circuit current-limiting
Networking Backplane Cards
provide additional protection for the LDO during system
Notebook Computers
fault conditions.
Network Interface Cards
Palmtop Computers
2.5V to 1.XV Regulators
2008 Microchip Technology Inc. DS22056B-page 1MCP1825/MCP1825S
Package Types
MCP1825 MCP1825S
DDPAK-5 TO-220-5 DDPAK-3 TO-220-3
Fixed/Adjustable
123
12 3
12 3 4 5
12 3 4 5
SOT-223-5 SOT-223-3
6 4
12 4 1 2 3
3 5
Pin
Pin Fixed Adjustable
1V
SHDN
1 SHDN IN
2 GND (TAB)
2V V
IN IN
3V
OUT
3 GND (TAB) GND (TAB)
4 GND (TAB)
V
4V
OUT OUT
5 PWRGD ADJ
6 GND (TAB) GND (TAB)
DS22056B-page 2 2008 Microchip Technology Inc.