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LT1301

ABSOLUTE MAXIMUM RATINGS

PACKAGE/ORDER INFORMATION

VIN Voltage .............................................................. 10V

SW1 Voltage ............................................................ 20V

Sense Voltage .......................................................... 20V

Shutdown Voltage ................................................... 10V

Select Voltage .......................................................... 10V

ILIM Voltage ............................................................ 0.5V

Maximum Power Dissipation ............................. 500mW

Operating Temperature Range

LT1301C ................................................... 0

°C to 70°C

LT1301I .................................................. 40

°C to 85°C

Storage Temperature Range ................. – 65

°C to 150°C

Lead Temperature (Soldering, 10 sec).................. 300

°C

S8 PART MARKING

1301

1301I

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Quiescent Current

VSHDN = 0.5V, VSEL = 5V, VSENSE = 5.5V

120

200

µA

VSHDN = 1.8V

715

µA

VIN

Input Voltage Range

1.8

2.0

VOUT

Output Sense Voltage

VSEL = 5V

11.52

12.00

12.48

VSEL = 0V

4.75

5.00

5.25

Output Referred

VSEL = 5V (Note 1)

100

Comparator Hysteresis

VSEL = 0V (Note 1)

Oscillator Frequency

Current Limit not Asserted.

120

155

185

kHz

Oscillator TC

0.2

°C

Maximum Duty Cycle

tON

Switch On-Time

Current Limit not Asserted.

5.6

µs

Output Line Regulation

1.8V < VIN < 6V

0.06

0.15

%/V

VCESAT

Switch Saturation Voltage

ISW = 700mA

130

200

Switch Leakage Current

VSW = 5V, Switch Off

0.1

µA

Peak Switch Current

ILIM Floating (See Typical Application)

0.75

1.0

1.25

(Internal Trip Point)

ILIM Grounded

0.4

VSHDNH

Shutdown Pin High

1.8

VSHDNL

Shutdown Pin Low

0.5

VSELH

Select Pin High

1.5

VSELL

Select Pin Low

0.8

ISHDN

Shutdown Pin Bias Current

VSHDN = 5V

820

µA

VSHDN = 2V

µA

VSHDN = 0V

0.1

µA

ISEL

Select Pin Bias Current

0V < VSEL < 5V

µA

ELECTRICAL CHARACTERISTICS T

A = 25°C, VIN = 2V unless otherwise noted.

The q denotes specifications which apply over the 0

°C to 70°C

temperature range.

ORDER PART

NUMBER

Note 1: Hysteresis specified is DC. Output ripple may be higher if

output capacitance is insufficient or capacitor ESR is excessive.

See operation section.

LT1301CN8

LT1301CS8

LT1301IS8

TOP VIEW

GND

SEL

SHDN

SENSE

PGND

VIN

ILIM

N8 PACKAGE

8-LEAD PLASTIC DIP

S8 PACKAGE

8-LEAD PLASTIC SOIC

TJMAX = 100°C, θJA = 150°C/ W

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