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PDF MCP1703A Data sheet ( Hoja de datos )
| Número de pieza | MCP1703A | |
| Descripción | Low Quiescent Current LDO Regulator | |
| Fabricantes | Microchip | |
| Logotipo |  |
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MCP1703A
250 mA, 16V, Low Quiescent Current LDO Regulator
Features:
• Reduced Ground Current During Dropout
• Faster Startup Time
• 2.0 µA Typical Quiescent Current
• Input Operating Voltage Range: 2.7V to16.0V
• 250 mA Output Current for Output Voltages ≥ 2.5V
• 200 mA Output Current for Output Voltages < 2.5V
• Low Dropout Voltage, 625 mV Typical @ 250 mA
for VR = 2.8V
• 0.4% Typical Output Voltage Tolerance
• Standard Output Voltage Options:
- 1.2V, 1.5V, 1.8V, 2.5V, 2.8V, 3.0V, 3.3V, 4.0V,
5.0V
• Output Voltage Range: 1.2V to 5.5V in 0.1V
Increments (50 mV increments available upon
request)
• A/D Friendly Voltage Options: 2.05V, 3.07V, 4.1V
• Stable with 1.0 µF to 22 µF Ceramic Output
Capacitance
• Short-Circuit Protection
• Overtemperature Protection
Applications:
• Battery-Powered Devices
• Battery-Powered Alarm Circuits
• Smoke Detectors
• CO2 Detectors
• Pagers and Cellular Phones
• Smart Battery Packs
• Low Quiescent Current Voltage Reference
• PDAs
• Digital Cameras
• Microcontroller Power
• Solar-Powered Instruments
• Consumer Products
Related Literature:
• AN765, “Using Microchip’s Micropower LDOs”,
DS00765, Microchip Technology Inc., 2007
• AN766, “Pin-Compatible CMOS Upgrades to
Bipolar LDOs”, DS00766,
Microchip Technology Inc., 2003
• AN792, “A Method to Determine How Much
Power a SOT23 Can Dissipate in an Application”,
DS00792, Microchip Technology Inc., 2001
Description:
The MCP1703A is an improved version of the
MCP1703 low dropout (LDO) voltage regulator that can
deliver up to 250 mA of current while consuming only
2.0 µA of quiescent current (typical). The input
operating range is specified from 2.7V to 16.0V, making
it an ideal choice for two to six primary cell battery-
powered applications, 9V alkaline and one or two-cell
Li-Ion-powered applications.
The MCP1703A is capable of delivering 250 mA with
only 625 mV (typical) of input to output voltage
differential (VOUT = 2.8V). The output voltage tolerance
of the MCP1703A is typically ±0.4% at +25°C and ±3%
maximum over the operating junction temperature
range of -40°C to +125°C. Line regulation is ±0.1%
typical at +25°C.
Output voltages available for the MCP1703A range
from 1.2V to 5.5V. The LDO output is stable when using
only 1 µF of output capacitance. Ceramic, tantalum or
aluminum electrolytic capacitors can all be used for
input and output. Overcurrent limit and overtemperature
shutdown provide a robust solution for any application.
Package options include the SOT-223-3, SOT-23A,
2x3 DFN-8 and SOT-89-3.
Package Types
2x3 DFN*
VOUT 1
8 VIN
NC 2 EP 7 NC
NC 3 9 6 NC
GND 4
5 NC
SOT-89
VIN
SOT-23A
VIN
3
12
GND VOUT
SOT-223
123
GND VIN VOUT
1 23
VIN GND VOUT
* Includes Exposed Thermal Pad (EP); see Table 3-1.
2012-2013 Microchip Technology Inc.
DS20005122B-page 1
1 page  
MCP1703A
2.0 TYPICAL PERFORMANCE CURVES
Note:
The graphs and tables provided following this note are a statistical summary based on a limited number of
samples and are provided for informational purposes only. The performance characteristics listed herein
are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified
operating range (e.g., outside specified power supply range) and therefore outside the warranted range.
Note: Unless otherwise indicated: COUT = 1 µF Ceramic (X7R), CIN = 1 µF Ceramic (X7R), IL = 1 mA, TA = +25°C,
VIN = VOUT(MAX) + VDROPOUT(MAX) or 2.7V, whichever is greater.
Note: Junction Temperature (TJ) is approximated by soaking the device under test to an ambient temperature equal to
the desired junction temperature. The test time is small enough such that the rise in Junction temperature over the
Ambient temperature is not significant.
5.00
4.00
VOUT = 1.2V
IOUT = 0 µA
3.00
2.00
-45°C
+130°C
0°C
+90°C +25°C
1.00
0.00
2
4
FIGURE 2-1:
Voltage.
6 8 10 12 14 16
Input Voltage (V)
Quiescent Current vs. Input
60
50
40
30
20
10
0
0
40
FIGURE 2-4:
Current.
VOUT = 1.2V
VIN = 2.7V
80 120 160
Load Current (mA)
200
Ground Current vs. Load
6.00
5.00
4.00
3.00
+90°C
+130°C
VOUT = 2.5V
IOUT = 0 µA
2.00
1.00
- 45°C
+90°C
0°C
0.00
2 4 6 8 10 12 14 16
Input Voltage (V)
FIGURE 2-2:
Voltage.
Quiescent Current vs. Input
60
50
40
30
20
10
0
0
VOUT = 2.5V
VIN = 3.5V
VOUT = 5.0V
VIN = 6.0V
50 100 150
Load Current (mA)
200
250
FIGURE 2-5:
Current.
Ground Current vs. Load
7
VOUT = 5.0V
6 IOUT = 0 µA
5
- 45°C
+25°C
4 +130°C
3 0°C
+90°C
2
1
6 8 10 12 14 16
Input Voltage (V)
FIGURE 2-3:
Voltage.
Quiescent Current vs. Input
3.0
IOUT = 0 mA
2.5
2.0
1.5
VOUT = 1.2V
1.0 VIN = 2.7V
VOUT = 2.5V
VIN = 3.5V
VOUT = 5.0V
VIN = 6.0V
0.5
0.0
-45
-20 5 30 55 80 105
Junction Temperature (°C)
130
FIGURE 2-6:
Quiescent Current vs.
Junction Temperature.
2012-2013 Microchip Technology Inc.
DS20005122B-page 5
5 Page 
MCP1703A
3.0 PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1:
2x3 DFN
4
1
8
2, 3, 5, 6, 7
9
MCP1703A PIN FUNCTION TABLE
SOT-223
2,Tab
3
1
—
—
SOT-23A
1
2
3
—
—
SOT-89
1
3
2,Tab
—
—
Name
GND
VOUT
VIN
NC
EP
Function
Ground Terminal
Regulated Voltage Output
Unregulated Supply Voltage
No Connection
Exposed Thermal Pad (EP); must be
connected to VSS
3.1 Ground Terminal (GND)
Regulator ground. Tie GND to the negative side of the
output and the negative side of the input capacitor.
There is no high current and only the LDO bias current
(2.0 µA typical) flows out of this pin. The LDO output
regulation is referenced to this pin. Minimize voltage
drops between this pin and the negative side of the
load.
3.2 Regulated Output Voltage (VOUT)
Connect VOUT to the positive side of the load and the
positive terminal of the output capacitor. The positive
side of the output capacitor should be physically
located close to the LDO VOUT pin as is practical. The
current flowing out of this pin is equal to the DC load
current.
3.3 Unregulated Input Voltage (VIN)
Connect VIN to the input unregulated source voltage.
Like all low dropout linear regulators, low source
impedance is necessary for stable operation of the
LDO. The amount of capacitance required to ensure
low source impedance depends on the proximity of the
input source capacitors or battery type. For most
applications, 1 µF of capacitance ensures stable
operation of the LDO circuit. The input capacitance
requirement can be lowered for applications that have
load currents below 100 mA. The type of capacitor
used can be ceramic, tantalum or aluminum
electrolytic. The low ESR characteristics of the ceramic
yields better noise and PSRR performance at
high-frequency.
3.4 Exposed Thermal Pad (EP)
An internal electrical connection between the Exposed
Thermal Pad (EP) and the VSS pin. They must be
connected to the same potential on the Printed Circuit
Board (PCB).
2012-2013 Microchip Technology Inc.
DS20005122B-page 11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet MCP1703A.PDF ] | |
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