© 2000 SEMTECH CORP.

652 MITCHELL ROAD NEWBURY PARK CA 91320

500mA SmartLDO

Signal Sequencing

SC1545

PRELIMINARY - January 17, 2000

2

ABSOLUTE MAXIMUM RATINGS

Parameter

Symbol

Maximum

Units

12V Input Voltage Range

12VIN

-0.3 to +15

V

5V Input Voltage Range

5VSTBY

-0.3 to +7

V

P-channel MOSFET Gate Drive

PDR

-0.3 to 5VSTBY

V

N-channel MOSFET Gate Drive

NDR

-0.3 to 12VIN

V

Input Pins

-0.3 to +7

V

Operating Ambient Temperature Range

T

A

0 to +70

°C

Operating Junction Temperature Range

T

J

0 to +125

°C

Storage Temperature Range

T

STG

-65 to +150

°C

Lead Temperature (Soldering) 10 Sec

T

LEAD

300

°C

Thermal Impedance Junction to Case

θ

JC

47

°C/W

Thermal Impedance Junction to Ambient

(1)

θ

JA

65

°C/W

ESD Rating

ESD

2

kV

ELECTRICAL CHARACTERISTICS

Unless specified, 12VIN = 12V, 5VSTBY = 5V, C

Parameter

Symbol

Test Conditions

MIN

TYP

MAX

Units

12VIN

Supply Voltage

12VIN

11.28 12.00 12.72

V

Quiescent Current

I

Q12

800

1000

µA

1200

5VSTBY

Supply Voltage

5VSTBY

4.7

5.0

5.3

V

Quiescent Current

I

Q5

LDO ON

9.5

11

12

mA

LDO OFF

3.0

4.0

5.0

Undervoltage Lockout (5V)

UVLO Threshold

UVLO

5VSTBY rising

4.1

4.3

4.5

V

5VSTBY falling

3.9

4.1

4.3

V

Hysteresis

HYST

200

mV

Logic Reset Threshold

RST

1.5

2.0

2.5

V

Note:

(1) 2 inch square of 1/16” FR-4, double sided, 1 oz. minimum copper weight.