Absolute Maximum Ratings (Note 1, Note

2)

If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales Office/

Distributors for availability and specifications.

VINLDO12, VIN1, AVDD, VIN2,

VINLDO1, VINLDO2, ENSW1,

FB1, FB2, ENSW2, ENLDO1,

ENLDO2, SYNC, FBL1, FBL2

−0.3V to +6V

GND to GND SLUG

±0.3V

Power Dissipation (P

(T

(Note 5)

1.17W

Junction Temperature (T

150°C

Storage Temperature Range

−65°C to +150°C

Maximum Lead Temperature (Soldering)

260°C

ESD Ratings

Human Body Model (Note

4)

2 kV

Operating Ratings: Bucks (Note 1, Note

2, Note 7)

V

IN

2.8V to 5.5V

V

EN

0 to (V

Junction Temperature (T

–40°C to +125°C

Ambient Temperature (T

(Note 6)

−40°C to +85°C

Junction-to-Ambient Thermal

Resistance (

θ

34.1°C/W

General Electrical Characteristics (Note 1, Note 2, Note 7, Note 13, Note 16)

Unless otherwise noted, V

boldface type apply over the entire junction temperature range for operation, −40°C to +125°C.

Symbol

Parameter

Conditions

Min

Typ

Max

Units

I

Q

VINLDO12 Shutdown Current

V

0.5

µA

V

POR

Power-On Reset Threshold

V

1.9

V

T

SD

Thermal Shutdown Threshold

(Note 13)

160

°C

T

SDH

Themal Shutdown Hysteresis

(Note 13)

20

°C

UVLO

Under Voltage Lock Out

Rising

2.9

V

Failing

2.7

V

Low Drop Out Regulators, LDO1 and LDO2

Unless otherwise noted, V

T

(Note 2, Note 7, Note 8, Note 9)

Symbol

Parameter

Conditions

Min

Typ

Max

Units

V

IN

Operational Voltage Range

VINLDO1 and VINLDO2 PMOS

pins (Note 15)

1.74

5.5

V

V

FB

FB Voltage Accuracy

−3

3

%

ΔV

OUT

Line Regulation

V

(Note 12) Load Current = 1 mA

0.15

%/V

Load Regulation

V

Load Current = 1 mA to I

MAX

0.011

%/mA

I

SC

Short Circuit Current Limit

LDO1-2, V

500

mA

V

Dropout Voltage

Load Current = 50 mA

(Note 10)

25

200

mV

PSRR

Power Supply Ripple Rejection

F = 10 kHz, Load Current = I

MAX

45

dB

θn

Supply Output Noise

10 Hz < F < 100 kHz

150

µVrms

I

Q

Quiescent Current “On”

I

40

150

µA

Quiescent Current “On”

I

60

200

µA

Quiescent Current “Off”

EN is de-asserted

0.03

1

µA

T

ON

Turn On Time

Start up from shut-down

300

µsec

5

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