LM26480SQ-BFSLASHNOPB datasheet(7/37 Pages) TI1

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LM26480

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SNVS543I – JANUARY 2008 – REVISED MAY 2013

General Electrical Characteristics

(1) (2) (3) (4) (5)

Unless otherwise noted, VIN = 3.6V. Typical values and limits appearing in normal type apply for TJ = 25°C. Limits appearing

in boldface type apply over the entire junction temperature range for operation,

−40°C to +125°C.

Symbol

Parameter

Conditions

Min

Typ

Max

Units

VINLDO12 Shutdown Current

VIN = 3.6V

0.5

µA

VPOR

Power-On Reset Threshold

VDD Falling Edge

(5)

1.9

TSD

Thermal Shutdown Threshold

(4)

160

°C

TSDH

Themal Shutdown Hysteresis

(4)

°C

Rising

2.9

UVLO

Under Voltage Lock Out

Failing

2.7

(1)

Absolute Maximum Ratings indicate limits beyond which damage to the component may occur. Operating Ratings are conditions under

which operation of the device is speficied. Operating Ratings do not imply ensure performance limits. For performance limits and

associated test conditions, see the Electrical Characteristics.

(2)

All voltages are with respect to the potential at the GND pin.

(3)

Min and Max limits are specified by design, test, or statistical analysis. Typical numbers represent the most likely norm.

(4)

Specified by design. Not production tested.

(5)

VPOR is voltage at which the EPROM resets. This is different from the UVLO on VINLDO12, which is the voltage at which the

regulators shut off; and is also different from the nPOR function, which signals if the regulators are in a specified range.

Low Drop Out Regulators, LDO1 and LDO2

Unless otherwise noted, VIN = 3.6V, CIN = 1.0 µF, COUT = 0.47 µF. Typical values and limits appearing in normal type apply for

TJ = 25°C. Limits appearing in boldface type apply over the entire junction temperature range for operation, −40°C to

+125°C.

(1) (2) (3) (4)

Symbol

Parameter

Conditions

Min

Typ

Max

Units

VIN

Operational Voltage Range

VINLDO1 and VINLDO2 PMOS

1.74

5.5

pins (5)

VFB

FB Voltage Accuracy

−3

Line Regulation

VIN = (VOUT + 0.3V) to 5.0V

0.15

%/V

(6) Load Current = 1 mA

ΔVOUT

Load Regulation

VIN = 3.6V,

0.011

%/mA

Load Current = 1 mA to IMAX

ISC

Short Circuit Current Limit

LDO1-2, VOUT = 0V

500

VIN – VOUT

Dropout Voltage

Load Current = 50 mA

200

(7)

PSRR

Power Supply Ripple Rejection

F = 10 kHz, Load Current = IMAX

θn

Supply Output Noise

10 Hz < F < 100 kHz

150

µVrms

Quiescent Current “On”

IOUT = 0 mA

150

µA

Quiescent Current “On”

IOUT = 300 mA

200

µA

Quiescent Current “Off”

EN is de-asserted

0.03

µA

TON

Turn On Time

Start up from shut-down

300

µsec

Capacitance for stability 0°C

≤ TJ

0.33

0.47

µF

≤ 125°C

COUT

Output Capacitor

−40°C ≤ TJ ≤ 125°C

0.68

1.0

µF

ESR (Equivalent Series

500

Ω

Resistance)

(1)

All voltages are with respect to the potential at the GND pin.

(2)

Min and Max limits are specified by design, test, or statistical analysis. Typical numbers represent the most likely norm.

(3)

CIN, COUT: Low-ESR Surface-Mount Ceramic Capacitors (MLCCs) used in setting electrical characteristics.

(4)

The device maintains a stable, regulated output voltage without a load.

(5)

Pins 24, 19 can operate from VIN min of 1.74V to a VIN max of 5.5V. This rating is only for the series pass PMOS power FET. It allows

the system design to use a lower voltage rating if the input voltage comes from a buck output.

(6)

VIN minimum for line regulation values is 1.8V.

(7)

Dropout voltage is the voltage difference between the input and the output at which the output voltage drops to 100 mV below its

nominal value.

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