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PDF MCP1755 Data sheet ( Hoja de datos )
| Número de pieza | MCP1755 | |
| Descripción | High Performance LDO | |
| Fabricantes | Microchip | |
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MCP1755/1755S
300 mA, 16V, High-Performance LDO
Features:
• High PSRR: >70 dB @ 1 kHz, typical
• 68.0 µA Typical Quiescent Current
• Input Operating Voltage Range: 3.6V to 16.0V
• 300 mA Output Current for all Output Voltages
• Low Dropout Voltage, 300 mV typical @ 300 mA
• Standard Output Voltage Options (1.8V, 2.5V,
2.8V, 3.0V, 3.3V, 4.0V, 5.0V)
• Output Voltage Range 1.8V to 5.5V in 0.1V
Increments (tighter increments are also possible
per design)
• Output Voltage Tolerances of ±2.0% over entire
Temperature Range
• Stable with Minimum 1.0 µF Output Capacitance
• Power Good Output
• Shutdown Input
• True Current Foldback Protection
• Short-Circuit Protection
• Overtemperature Protection
Applications:
• Battery-powered Devices
• Battery-powered Alarm Circuits
• Smoke Detectors
• CO2 Detectors
• Pagers and Cellular Phones
• Smart Battery Packs
• Portable Digital Assistant (PDA)
• Digital Cameras
• Microcontroller Power
• Consumer Products
• Battery-powered Data Loggers
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 SOT-23 Can Dissipate in an Application”
(DS00792), Microchip Technology Inc., 2001
Description:
The MCP1755/1755S is a family of CMOS low-dropout
(LDO) voltage regulators that can deliver up to 300 mA
of current while consuming only 68.0 µA of quiescent
current (typical). The input operating range is specified
from 3.6V to 16.0V, making it an ideal choice for four to
six primary cell battery-powered applications, 12V
mobile applications and one to three cell Li-Ion-
powered applications.
The MCP1755/1755S is capable of delivering 300 mA
with only 300 mV (typical) of input-to-output voltage
differential. The output voltage tolerance of the
MCP1755 is typically +0.85% at +25°C and ±2.0%
maximum over the operating junction temperature
range of -40°C to +125°C. Line regulation is ±0.01%
typical at +25°C.
Output voltages available for the MCP1755/1755S
range from 1.8V to 5.5V. The LDO output is stable when
using only 1 µF of output capacitance. Ceramic,
tantalum or aluminum electrolytic capacitors may all be
used for input and output. Overcurrent limit and
overtemperature shutdown provide a robust solution for
any application.
The MCP1755/1755S family has a true current foldback
feature. When the load impedance decreases beyond
the MCP1755/1755S load rating, the output current and
voltage will gracefully foldback towards 30 mA at about
0V output. When the load impedance increases and
returns to the rated load, the MCP1755/1755S will
follow the same foldback curve as the device comes out
of current foldback.
Package options for the MCP1755 include the
SOT-23-5, SOT-223-5 and 8-lead 2 x 3 DFN.
Package options for the MCP1755S device include the
SOT-223-3 and 8-lead 2 x 3 DFN.
2012 Microchip Technology Inc.
DS25160A-page 1
1 page  
MCP1755/1755S
1.0 ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings †
Input Voltage, VIN .........................................................+17.6V
VIN, PWRGD, SHDN................. (GND – 0.3V) to (VIN + 0.3V)
VOUT................................................. (GND – 0.3V) to (+5.5V)
Internal Power Dissipation ............ Internally-Limited (Note 6)
Output Short Circuit Current ................................. Continuous
Storage temperature .....................................-55°C to +150°C
Maximum Junction Temperature ....................+165°C(Note 7)
Operating Junction Temperature...................-40°C to +150°C
ESD protection on all pins kV HBM and 400V MM
† Notice: Stresses above those listed under “Maximum
Ratings” may cause permanent damage to the device.
This is a stress rating only and functional operation of
the device at those or any other conditions above those
indicated in the operational listings of this specification
is not implied. Exposure to maximum rating conditions
for extended periods may affect device reliability.
AC/DC CHARACTERISTICS
Electrical Specifications: Unless otherwise specified, all limits are established for VIN = VR + 1V, Note 1,
ILOAD = 1 mA, COUT = 1 µF (X7R), CIN = 1 µF (X7R), TA = +25°C, tr(VIN) = 0.5 V/µs, SHDN = VIN,
PWRGD = 10K to VOUT. Boldface type applies for junction temperatures, TJ (Note 7) of -40°C to +125°C.
Parameters
Sym.
Min.
Typ. Max. Units
Conditions
Input/Output Characteristics
Input Operating Voltage
Output Voltage Operating
Range
VIN
VOUT-RANGE
3.6
1.8
— 16.0 V
— 5.5 V
Input Quiescent Current
Iq
— 68 100 µA IL = 0 mA
Input Quiescent Current
ISHDN
—
0.1
4 µA SHDN = GND
for SHDN mode
Ground Current
Maximum Output Current
Output Soft Current Limit
IGND
IOUT_mA
SCL
—
300
—
300 400 µA ILOAD = 300 mA
— — mA
450 — mA VOUT 0.1V,
VIN = VIN(MIN),
Current measured 10 ms after
the load is applied
Output Pulse Current Limit
PCL
— 350 — mA Pulse Duration < 100 ms,
Duty Cycle < 50%,
VOUT 0.1V, Note 6
Output Short Circuit
Foldback Current
IOUT_SC
—
30 — mA VIN = VIN(MIN),
VOUT = GND
Output Voltage Overshoot
VOVER
—
0.5 — %VOUT VIN = 0 to 16V,
on Start-up
ILOAD = 300 mA
Note 1:
2:
3:
4:
The minimum VIN must meet two conditions: VIN 3.6V and VIN VR + VDROPOUT(MAX).
VR is the nominal regulator output voltage when the input voltage VIN = VRated + VDROPOUT(MAX) or VIN = 3.6V (whichever is
greater); IOUT = 1 mA.
TCVOUT = (VOUT-HIGH – VOUT-LOW) x 106/(VR x Temperature), VOUT-HIGH = highest voltage measured over the temperature
range. VOUT-LOW = lowest voltage measured over the temperature range.
Load regulation is measured at a constant junction temperature using low duty-cycle pulse testing. Changes in output
voltage due to heating effects are determined using thermal regulation specification TCVOUT.
5: Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below the output voltage
value that was measured with an applied input voltage of VIN = VR + 1V or VIN = 3.6V (whichever is greater).
6: The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable junction
temperature and the thermal resistance from junction to air (i.e., TA, TJ, JA). Exceeding the maximum allowable power
dissipation will cause the device operating junction temperature to exceed the maximum +150°C rating. Sustained junction
temperatures above +150°C can impact the device reliability.
7: The junction temperature is approximated by soaking the device under test at an ambient temperature equal to the desired
junction temperature. The test time is small enough such that the rise in the junction temperature over the ambient
temperature is not significant.
8: See Section 4.6 “Shutdown Input (SHDN)” and Figure 2-34.
2012 Microchip Technology Inc.
DS25160A-page 5
5 Page 
MCP1755/1755S
Note 1: Unless otherwise indicated VR = 3.3V, COUT = 1 µF Ceramic (X7R), CIN = 1 µF Ceramic (X7R), IL = 1 mA,
TA = +25°C, VIN = VR + 1V or VIN = 3.6V (whichever is greater), SHDN = VIN, package = SOT-223
0.50
0.45
VOUT = 5.0V
0.40
0.35
0.30
+25°C
0.25
0.20
0.15
+130°C
+90°C
0.10
0.05
0.00
-45°C
0°C
0 50 100 150 200 250
Load Current (mA)
300
FIGURE 2-13:
Current.
Dropout Voltage vs. Load
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
2
-40 C
+125 C
+25 C
46
VOUT = 3.3V
Hard Short Circuit
ROUT < 0.1:
8 10 12 14 16
FIGURE 2-16:
Input Voltage.
Input Voltage (V)
Short Circuit Current vs.
VIN 4.3V
5.3V
VOUT (AC coupled, 20 mV/Div)
VOUT=3.3V
VIN=4.3V to 5.3V
IOUT=10 mA
Time=10 µs/Div
FIGURE 2-14:
Dynamic Line Response.
0.7
VOUT = 3.3V
0.6
Soft Short Circuit
0.5 ROUT = 5.5:
0.4
0.3 +125°C +25°C -40°C
0.2
0.1
0
24
FIGURE 2-17:
Input Voltage.
6 8 10 12 14 16
Input Voltage (V)
Short Circuit Current vs.
VIN 4.3V
5.3V
VOUT (AC coupled, 20 mv/Div)
VOUT=3.3V
VIN=4.3V to 5.3V
IOUT=100 mA
Time=10 µs/Div
FIGURE 2-15:
Dynamic Line Response.
0.40
0.35
VIN = 16V
0.30
0.25
VIN = 12V
VIN = 10V
0.20
0.15
0.10
VIN = 6V
VIN = 4.3V
VIN = 3.6V
0.05
0.00
-0.05
VOUT = 1.8V
IOUT = 1 mA to 300 mA
-40 -25 -10 5 20 35 50 65 80 95 110 125
Temperature (ºC)
FIGURE 2-18:
Temperature.
Load Regulation vs.
2012 Microchip Technology Inc.
DS25160A-page 11
11 Page | ||
| Páginas | Total 40 Páginas | |
| PDF Descargar | [ Datasheet MCP1755.PDF ] | |
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