MCP1726 データシートの表示（PDF） - Microchip Technology
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MCP1726 Datasheet PDF : 30 Pages
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MCP1726
1.0 ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings †
VIN ....................................................................................6.5V
Maximum Voltage on Any Pin .. (GND – 0.3V) to (VDD + 0.3)V
Maximum Junction Temperature, TJ ........................... +150°C
Maximum Power Dissipation......... Internally-Limited (Note 6)
Storage temperature .....................................-65°C to +150°C
† 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.
DC CHARACTERISTICS
Electrical Specifications: Unless otherwise noted, VIN = (VR + 0.5V) or 2.3V, whichever is greater, IOUT = 1 mA,
CIN = COUT = 4.7 µF (X7R Ceramic), TA = +25°C. Boldface type applies for junction temperatures, TJ (Note 7) of -40°C to +125°C
Parameters
Sym
Min
Typ
Max
Units
Conditions
Input Operating Voltage
Input Quiescent Current
Input Quiescent Current for
SHDN Mode
VIN
Iq
ISHDN
2.3
6.0
V Note 1
—
140
220
µA IL = 0 mA, VIN = VR +0.5V,
VOUT = 0.8V to 5.0V
—
0.1
3
µA SHDN = GND
Maximum Output Current
Line Regulation
Load Regulation
Output Short Circuit Current
Adjust Pin Characteristics
IOUT
1
—
—
A
VIN = 2.3V to 6.0V (Note 1)
ΔVOUT/
—
0.05
0.3
%/V (VR + 0.5)V ≤ VIN ≤ 6V
(VOUT x ΔVIN)
ΔVOUT/VOUT
-1.5
±0.5
1.5
% IOUT = 1 mA to 1A,
VIN = (VR + 0.6)V (Note 4)
IOUT_SC
—
1.7
—
A
VIN = (VR + 0.5)V,
RLOAD < 0.1Ω, Peak Current
Adjust Pin Reference Voltage
Adjust Pin Leakage Current
Adjust Temperature Coefficient
Fixed-Output Characteristics
VADJ
IADJ
TCVOUT
0.402
-10
—
0.410
±0.01
40
0.418
+10
—
V
nA
ppm/°C
VIN = 2.3V to VIN = 6.0V,
IOUT = 1 mA
VIN = 6.0V, VADJ = 0V to 6V
Note 3
Voltage Regulation
Dropout Characteristics
VOUT
VR - 2.5% VR ±0.5% VR + 2.5%
V
Note 2
Dropout Voltage
VIN-VOUT
—
220
500
mV
IOUT = 1A, VIN(MIN) = 2.3V
(Note 5)
Note 1:
2:
3:
4:
5:
6:
7:
The minimum VIN must meet two conditions: VIN ≥ 2.3V and VIN ≥ (VR + 2.5%) + VDROPOUT.
VR is the nominal regulator output voltage for the fixed cases. VR = 1.2V, 1.8V, etc. VR is the desired set point output
voltage for the adjustable cases. VR = VADJ * ((R1/R2)+1). Figure 4-1.
TCVOUT = (VOUT-HIGH – VOUT-LOW) *106 / (VR * ΔTemperature). VOUT-HIGH is the highest voltage measured over the
temperature range. VOUT-LOW is the lowest voltage measured over the temperature range.
Load regulation is measured at a constant junction temperature using low duty-cycle pulse testing. Load regulation is
tested over a load range from 1 mA to the maximum specified output current.
Dropout voltage is defined as the input-to-output voltage differential at which the output voltage drops 2% below its
nominal value that was measured with an input voltage of VIN = VR + 0.5V.
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, θJA). Exceeding the maximum allowable power
dissipation will cause the device operating junction temperature to exceed the maximum 150°C rating. Sustained
junction temperatures above 125°C can impact device reliability.
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.
DS21936C-page 4
© 2007 Microchip Technology Inc.
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