TC1265 datasheet(2/16 Pages) MICROCHIP

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TC1265

DS21376C-page 2

 2004 Microchip Technology Inc.

1.0

ELECTRICAL

CHARACTERISTICS

Absolute Maximum Ratings †

Input Voltage .........................................................6.5V

Output Voltage.................. (VSS – 0.3V) to (VIN + 0.3V)

Power Dissipation................Internally Limited (Note 7)

Maximum Voltage on Any Pin ........VIN +0.3V to -0.3V

Operating Temperature Range...... -40°C < TJ < 125°C

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

operation 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 indicated, VIN = VR + 1.5V, (Note 1), IL = 100 µA, CL = 3.3 µF,

SHDN > VIH, TA = +25°C. Boldface type specifications apply for junction temperatures of -40°C to +125°C.

Parameters

Sym

Min

Typ

Max

Units

Conditions

Input Operating Voltage

VIN

2.7

—

6.0

Note 2

Maximum Output Current

IOUTMAX

800

——

Output Voltage

VOUT

VR – 2.5% VR ± 0.5% VR + 2.5%

VVR ≥ 2.5V

VR – 2%

VR ± 0.5%

VR + 3%

VR = 1.8V

VOUT Temperature Coefficient

∆V

OUT/∆T

—

ppm/°C

Note 3

Line Regulation

∆V

OUT/∆VIN

—

0.007

0.35

%(VR + 1V) ≤ VIN ≤ 6V

Load Regulation (Note 4)

∆V

OUT/VOUT

-0.01

0.002

+0.01

%/mA

IL = 0.1 mA to IOUTMAX

Dropout Voltage (Note 5)

VIN–VOUT

—20

VR ≥ 2.5V, IL = 100 µA

—50

160

IL = 100 mA

—

150

480

IL = 300 mA

—

260

800

IL = 500 mA

—

450

1300

IL = 800 mA

—

700

1000

VR = 1.8V, IL = 500 mA

—

890

1400

IL = 800 mA

Supply Current

IDD

—80

130

µA

SHDN = VIH, IL = 0

Shutdown Supply Current

ISHDN

—0.05

µA

SHDN = 0V

Power Supply Rejection Ratio

PSRR

—

≤ 1kHz

Output Short Circuit Current

IOUTSC

—

1200

1400

VOUT = 0V

Thermal Regulation

∆V

OUT/∆PD

—0.04

—

V/W

Note 6

Output Noise

—

260

—

nV/

√Hz I

L = IOUTMAX, F = 10 kHZ

Note

1: VR is the regulator output voltage setting.

2: The minimum VIN has to justify the conditions: VIN ≥ VR + VDROPOUT and VIN ≥ 2.7V for IL = 0.1 mA to IOUTMAX.

4: Regulation is measured at a constant junction temperature using low duty cycle pulse testing. Load regulation is tested

over a load range from 0.1 mA to the maximum specified output current. Changes in output voltage due to heating effects

are covered by the thermal regulation specification.

5: Dropout voltage is defined as the input-to-output differential at which the output voltage drops 2% below its nominal value

measured at a 1.5V differential.

6: Thermal regulation is defined as the change in output voltage at a time T after a change in power dissipation is applied,

excluding load or line regulation effects. Specifications are for a current pulse equal to ILMAX at VIN = 6V for T = 10 ms.

7: The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable junction temper-

ature and the thermal resistance from junction-to-air (i.e., TA, TJ, θJA). Exceeding the maximum allowable power dissipa-

tion causes the device to initiate thermal shutdown. Please see Section 5.0 “Thermal Considerations” for more details.

8: Hysteresis voltage is referenced to VR.

TCV

OUT

OUTMAX

OUTMIN

–

() 10

–

OUT

∆

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