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  Microchip Technology Semiconductor Electronic Components Datasheet  

MCP1826S Datasheet

Low Quiescent Current LDO Regulator

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MCP1826S pdf
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MCP1826/MCP1826S
1000 mA, Low Voltage, Low Quiescent Current
LDO Regulator
Features
• 1000 mA Output Current Capability
• Input Operating Voltage Range: 2.3V to 6.0V
• Adjustable Output Voltage Range: 0.8V to 5.0V
(MCP1826 only)
• Standard Fixed Output Voltages:
- 0.8V, 1.2V, 1.8V, 2.5V, 3.0V, 3.3V, 5.0V
• Other Fixed Output Voltage Options Available
Upon Request
• Low Dropout Voltage: 250 mV Typical at 1000 mA
• Typical Output Voltage Tolerance: 0.5%
• Stable with 1.0 µF Ceramic Output Capacitor
• Fast response to Load Transients
• Low Supply Current: 120 µA (typ)
• Low Shutdown Supply Current: 0.1 µA (typ)
(MCP1826 only)
• Fixed Delay on Power Good Output
(MCP1826 only)
• Short Circuit Current Limiting and
Overtemperature Protection
• TO-263-5 (DDPAK-5), TO-220-5, SOT-223-5
Package Options (MCP1826).
• TO-263-3 (DDPAK-3), TO-220-3, SOT-223-3
Package Options (MCP1826S).
Applications
• High-Speed Driver Chipset Power
• Networking Backplane Cards
• Notebook Computers
• Network Interface Cards
• Palmtop Computers
• 2.5V to 1.XV Regulators
Description
The MCP1826/MCP1826S is a 1000 mA Low Dropout
(LDO) linear regulator that provides high current and
low output voltages. The MCP1826 comes in a fixed or
adjustable output voltage version, with an output
voltage range of 0.8V to 5.0V. The 1000 mA output cur-
rent capability, combined with the low output voltage
capability, make the MCP1826 a good choice for new
sub-1.8V output voltage LDO applications that have
high current demands. The MCP1826S is a 3-pin fixed
voltage version.
The MCP1826/MCP1826S is stable using ceramic
output capacitors that inherently provide lower output
noise and reduce the size and cost of the entire
regulator solution. Only 1 µF of output capacitance is
needed to stabilize the LDO.
Using CMOS construction, the quiescent current
consumed by the MCP1826/MCP1826S is typically
less than 120 µA over the entire input voltage range,
making it attractive for portable computing applications
that demand high output current. The MCP1826
versions have a Shutdown (SHDN) pin. When shut
down, the quiescent current is reduced to less than
0.1 µA.
On the MCP1826 fixed output versions the scaled-
down output voltage is internally monitored and a
power good (PWRGD) output is provided when the
output is within 92% of regulation (typical). The
PWRGD delay is internally fixed at 200 µs (typical).
The overtemperature and short circuit current-limiting
provide additional protection for the LDO during system
fault conditions.
© 2007 Microchip Technology Inc.
DS22057A-page 1



  Microchip Technology Semiconductor Electronic Components Datasheet  

MCP1826S Datasheet

Low Quiescent Current LDO Regulator

No Preview Available !

MCP1826S pdf
MCP1826/MCP1826S
Package Types
MCP1826
DDPAK-5
TO-220-5
Fixed/Adjustable
12345
12345
SOT-223-5
6
12 345
Pin Fixed Adjustable
1 SHDN
SHDN
2 VIN
VIN
3
GND (TAB)
GND (TAB)
4 VOUT
5 PWRGD
VOUT
ADJ
6
GND (TAB)
GND (TAB)
www.DataSheet4U.com
MCP1826S
DDPAK-3
TO-220-3
123
123
SOT-223-3
4
1 23
Pin
1 VIN
2 GND (TAB)
3 VOUT
4 GND (TAB)
DS22057A-page 2
© 2007 Microchip Technology Inc.



  Microchip Technology Semiconductor Electronic Components Datasheet  

MCP1826S Datasheet

Low Quiescent Current LDO Regulator

No Preview Available !

MCP1826S pdf
Typical Application
On
Off
VIN = 2.3V to 2.8V
C1
4.7 µF
MCP1826/MCP1826S
www.DataSheet4U.com
MCP1826 Fixed Output Voltage
SHDN
VIN
1
R1
100 kΩ
GND
VOUT
PWRGD
VOUT = 1.8V @ 1000 mA
C2
1 µF
MCP1826 Adjustable Output Voltage
On
Off
VIN = 2.3V to 2.8V
C1
4.7 µF
SHDN
VIN
1
VADJ
R1
40 kΩ
VOUT
GND
R2
20 kΩ
VOUT = 1.2V @ 1000 mA
C2
1 µF
© 2007 Microchip Technology Inc.
DS22057A-page 3




Part Number MCP1826S
Description Low Quiescent Current LDO Regulator
Maker Microchip Technology
Total Page 30 Pages
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