MCP1726 datasheet(6/30 Pages) MICROCHIP

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MCP1726

DS21936B-page 6

TEMPERATURE SPECIFICATIONS

AC Performance

Output Delay From SHDN

TOR

100

µs

SHDN = GND to VIN

VOUT = GND to 95% VR

Output Noise

—2.0

—

µV/

√Hz IOUT = 200 mA, f = 1 kHz,

COUT = 1 µF (X7R

Ceramic), VOUT = 2.5V

Power Supply Ripple Rejection

Ratio

PSRR

—

f = 100 Hz, COUT = 10 µF,

IOUT = 100 mA,

VINAC = 30 mV pk-pk,

CIN = 0 µF

Thermal Shutdown Temperature

TSD

—150

—

°C

IOUT = 100 µA, VOUT =

1.8V, VIN = 2.8V

Thermal Shutdown Hysteresis

ΔTSD

—

°C

IOUT = 100 µA, VOUT =

1.8V, VIN = 2.8V

Electrical Specifications: Unless otherwise indicated, all limits apply for VIN = 2.3V to 6.0V.

Parameters

Sym

Min

Typ

Max

Units

Conditions

Temperature Ranges

Operating Junction Temperature Range

-40

—

+125

°C

Steady State

Maximum Junction Temperature

—

+150

°C

Transient

Storage Temperature Range

-65

—

+150

°C

Thermal Package Resistances

Thermal Resistance, 8LD 3 x 3 DFN

θJA

—

°C/W

4-Layer JC51-7

Standard Board with

vias

Thermal Resistance, 8LD SOIC

θJA

—

150

—

°C/W

4-Layer JC51-7

Standard Board

DC CHARACTERISTICS (Continued)

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

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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