LT8334

3

Rev. 0

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l

denotes the specifications which apply over the full operating

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Oscillator

l

l

l

265

0.9

1.85

300

1

2

327

1.08

2.15

kHz

MHz

MHz

SSFM Maximum Frequency Deviation

14

20

28

%

Minimum On-Time

70

60

90

85

ns

ns

Minimum Off-Time

l

50

75

ns

SYNC/Mode, Mode Thresholds (Note 5)

High (Rising)

Low (Falling)

l

l

0.14

1.3

0.2

1.7

V

V

SYNC/Mode, Clock Thresholds (Note 5)

Rising

Falling

l

l

0.4

1.3

0.8

1.7

V

V

0.95

1

1.25

kHz/kHz

SYNC Pin Current

SYNC = 2V

SYNC = 0V, Current Out of Pin

10

10

25

25

µA

µA

Switch

Maximum Switch Current Limit Threshold

l

5

6.25

7.75

A

Switch Overcurrent Threshold

Discharges SS Pin

9.4

A

70

mΩ

Switch Leakage Current

0.1

1

µA

EN/UVLO Logic

EN/UVLO Pin Threshold (Rising)

Start Switching

l

1.576

1.68

1.90

V

EN/UVLO Pin Threshold (Falling)

Stop Switching

l

1.545

1.6

1.645

V

EN/UVLO Pin Current

l

–75

75

nA

Soft-Start

Soft-Start Charge Current

SS = 0.5V

2

µA

Soft-Start Pull-Down Resistance

Fault Condition, SS = 0.1V

220

Ω

Error Amplifier

Error Amplifier Transconductance

FBX = 1.6V

FBX = –0.8V

75

60

µA/V

µA/V

Error Amplifier Voltage Gain

FBX = 1.6V

FBX = –0.8V

185

145

V/V

V/V

Error Amplifier Max Source Current

7

µA

Error Amplifier Max Sink Current

7

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.

loading is allowed on this pin.

Note 3: The LT8334R is specified over the –40°C to 150°C operating

junction range. High junction temperatures degrade operating

lifetimes. Note the maximum ambient temperature consistent with

these specifications is determined by specific operating conditions in

conjunction with board layout, the rated package thermal impedance and

other environmental factors.

Note 4: The IC includes overtemperature protection that is intended to protect

the device during overload conditions. Junction temperature will exceed 150°C

when overtemperature protection is active. Continuous operation above the

specified maximum operating junction temperature will reduce lifetime.

Note 5: For SYNC/MODE inputs required to select modes of operation see

the Pin Functions and Applications Information sections.

Note 6: The IC is tested in a Boost converter configuration with the output

voltage programmed for 24V.