MCP1726
1A, Low-Voltage, Low Quiescent Current LDO Regulator
Features: Description:
1A Output Current Capability The MCP1726 is a 1A Low Dropout (LDO) linear
regulator that provides high current and low output
Input Operating Voltage Range: 2.3V to 6.0V
voltages in a very small package. The MCP1726
Adjustable Output Voltage Range: 0.8V to 5.0V
comes in fixed or adjustable output voltage versions,
Standard Fixed Output Voltages:
with an output voltage range of 0.8V to 5.0V. The 1A
- 0.8V, 1.2V, 1.8V, 2.5V, 3.0V, 3.3V, 5.0V
output current capability and low output voltage
Low Dropout Voltage: 220 mV typical at 1A
capability make the MCP1726 a good choice for new
Typical Output Voltage Tolerance: 0.5% sub-1.8V output voltage LDO applications that have
high current demands.
Stable with 1.0 F Ceramic Output Capacitor
The MCP1726 is stable using ceramic output
Fast Response to Load Transients
capacitors that inherently provide lower output noise
Low Supply Current: 140 A (typical)
and reduce the size and cost of the entire regulator
Low Shutdown Supply Current: 0.1 A (typical)
solution. Only 1 F of output capacitance is needed to
Adjustable Delay on Power Good Output
stabilize the LDO.
Short-Circuit Current Limiting and
Using CMOS construction, the quiescent current
Overtemperature Protection
consumed by the MCP1726 is typically less than
3x3 DFN-8 and SOIC-8 Package Options
140 A over the entire input voltage range, making it
attractive for portable computing applications that
Applications:
demand high output current. When the MCP1726 is
shut down, the quiescent current is reduced to less
High-Speed Driver Chipset Power
than 0.1 A.
Networking Backplane Cards
The scaled-down output voltage is internally monitored
Notebook Computers
and a Power Good (PWRGD) output is provided when
Network Interface Cards
the output is within 92% of regulation (typical). An
Palmtop Computers
pin to
external capacitor can be used on the C
DELAY
2.5V to 1.XV Regulators adjust the delay from 1 ms to 300 ms.
The overtemperature and short-circuit current limiting
provide additional protection for the LDO during system
fault conditions.
Package Types
MCP1726-ADJ MCP1726-xx MCP1726-ADJ MCP1726-xx
SOIC SOIC 3x3 DFN 3x3 DFN
1 8 V V V V
1 8 V V 1 8 1 8
V V IN OUT IN OUT
IN OUT
IN OUT
2 7
2 7 V V V ADJ V V
V ADJ 2 EP 7 2 EP 7
IN OUT IN IN OUT
IN
9 9
3 6
3 6 SHDN C
SHDN C SHDN 3 6 C SHDN 3 6 C
DELAY
DELAY DELAY DELAY
GND 4 5 PWRGD
GND 4 5 PWRGD
GND 4 5 PWRGD GND 4 5 PWRGD
2005-2014 Microchip Technology Inc. DS20001936D-page 1MCP1726
Typical Application
MCP1726 Fixed Output Voltage
V =1.8V @ 1A
OUT
V = 2.3V to 2.8V
IN
1 V 8
V
OUT
IN
2 V V 7
IN OUT
C
C
1
2
4.7 F 1F
3 SHDN C 6
DELAY
R
1
45GND PWRGD
100 k
C
3
On
1000 pF
Off
PWRGD
MCP1726 Adjustable Output Voltage
V =1.2V @ 1A
V = 2.3V to 2.8V OUT
IN
V
1 V 8
IN OUT
R
1
2 V ADJ 7
40 k
IN
C
C
1
2
4.7 F 1F
SHDN C
3 6
DELAY
R
3
45GND PWRGD
100 k
On
R
2
C
3
20 k
Off
1000 pF
PWRGD
DS20001936D-page 2 2005-2014 Microchip Technology Inc.