MCP1726 datasheet(4/30 Pages) MICROCHIP

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MCP1726

DS21936B-page 4

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 Rat-

ings” 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. Expo-

sure 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

VIN

2.3

6.0

Note 1

Input Quiescent Current

—140

220

µA

IL = 0 mA, VIN = VR +0.5V,

VOUT = 0.8V to 5.0V

Input Quiescent Current for

SHDN Mode

ISHDN

—0.1

µA

SHDN = GND

Maximum Output Current

IOUT

——

VIN = 2.3V to 6.0V (Note 1)

Line Regulation

ΔVOUT/

(VOUT x ΔVIN)

—0.05

0.3

%/V

(VR + 0.5)V ≤ VIN ≤ 6V

Load Regulation

ΔVOUT/VOUT

-1.5

±0.5

1.5

%IOUT = 1 mA to 1A,

VIN = (VR + 0.6)V (Note 4)

Output Short Circuit Current

IOUT_SC

—1.7

—

VIN = (VR + 0.5)V,

RLOAD <0.1Ω, Peak Cur-

rent

Adjust Pin Characteristics

Adjust Pin Reference Voltage

VADJ

0.402

0.410

0.418

VVIN = 2.3V to VIN =6.0V,

IOUT = 1 mA

Adjust Pin Leakage Current

IADJ

-10

±0.01

+10

VIN = 6.0V,

VADJ =0V to 6V

Adjust Temperature Coefficient

TCVOUT

—40

—

ppm/°C Note 3

Note 1:

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) *10

6 / (V

R * 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 maxi-

mum allowable power dissipation will cause the device operating junction temperature to exceed the maxi-

mum 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.

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