LT3470A

3

3470afa

ELECTRICAL CHARACTERISTICS

The

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Minimum Input Voltage

●

4V

●

0.1

10

40

0.5

18

55

μA

μA

μA

Quiescent Current from Bias

●

0.1

30

0.1

0.5

60

1.5

μA

μA

μA

FB Comparator Trip Voltage

●

1.228

1.250

1.265

V

FB Pin Bias Current (Note 3)

●

35

35

80

150

nA

nA

FB Voltage Line Regulation

0.0006

0.02

%/V

Minimum Switch Off-Time (Note 5)

500

ns

Maximum Duty Cycle

●

90

95

%

Switch Leakage Current

0.7

1.5

μA

150

mV

0.9

1.2

V

Switch Top Current Limit

320

440

560

mA

Switch Bottom Current Limit

280

mA

Catch Schottky Drop

600

mV

Catch Schottky Reverse Leakage

0.2

2

μA

Boost Schottky Drop

690

775

mV

Boost Schottky Reverse Leakage

0.2

2

μA

Minimum Boost Voltage (Note 4)

●

1.7

2.2

V

BOOST Pin Current

2.3

5

mA

Bias Pin Preload

50

mA

SHDN Pin Current

1

5

μA

SHDN Input Voltage High

2V

SHDN Input Voltage Low

0.2

V

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 LT3470AE is guaranteed to meet performance specifications

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

temperature range are assured by design, characterization and correlation

with statistical process controls. The LT3470AI specifications are

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

Note 3: Bias current flows out of the FB pin.

Note 4: This is the minimum voltage across the boost capacitor needed to

guarantee full saturation of the switch.

Note 5: This parameter is assured by design and correlation with statistical

process controls.