LT1933HS6(RevD) View Datasheet(PDF) - Linear Technology

Part Name

Description

Manufacturer

LT1933HS6
(Rev.:RevD)

600mA, 500kHz Step-Down Switching Regulator in SOT-23 and DFN Packages

Linear Technology 

LT1933

ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, VBOOST = 17V, unless otherwise noted. (Note 2)

PARAMETER

CONDITIONS

MIN TYP

MAX

UNITS

Undervoltage Lockout

3.35

3.6

V

Feedback Voltage

l 1.225 1.245 1.265

V

FB Pin Bias Current

Quiescent Current

VFB = Measured VREF + 10mV (Note 4)

Not Switching

l

40

120

nA

1.6

2.5

mA

Quiescent Current in Shutdown

VSHDN = 0V

0.01

2

μA

Reference Line Regulation

Switching Frequency

Maximum Duty Cycle

VIN = 5V to 36V

VFB = 1.1V

VFB = 0V

0.01

%/V

400

500

600

kHz

55

kHz

l 88

94

%

Switch Current Limit

(Note 3)

0.75 1.05

A

Switch VCESAT

Switch Leakage Current

ISW = 400mA, S6 Package

ISW = 400mA, DCB6 Package

370

500

mV

370

mV

2

μA

Minimum Boost Voltage Above Switch

BOOST Pin Current

SHDN Input Voltage High

SHDN Input Voltage Low

SHDN Bias Current

ISW = 400mA

ISW = 400mA

VSHDN = 2.3V (Note 5)

VSHDN = 0V

1.9

2.3

V

18

25

mA

2.3

V

0.3

V

34

50

μA

0.01

0.1

μA

Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 2: The LT1933E is guaranteed to meet performance specifications

from 0°C to 70°C. Specifications over the –40°C to 85°C operating

temperature range are assured by design, characterization and correlation

with statistical process controls. The LT1933I specifications are

guaranteed over the –40°C to 125°C temperature range. The LT1933H

specifications are guaranteed over the –40°C to 150°C temperature range.

Note 3: Current limit guaranteed by design and/or correlation to static test.

Slope compensation reduces current limit at higher duty cycle.

Note 4: Current flows out of pin.

Note 5: Current flows into pin.

1933fd

3

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