LT3154

3

Rev. 0

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ELECTRICAL CHARACTERISTICS

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VIN Operating Voltage

EN/UVLO > 1.24V

l

1.8

5.5

V

VOUT Operating Voltage

Adjustable Version with External Divider

l

1.8

5.5

V

Feedback Voltage

l

0.98

1.0

1.02

V

VIN/VOUT Currents

PWM Mode No‑Load Current – VIN

20

mA

Sleep Quiescent Current – VIN

SYNC/MODE = 0V, VOUT in Regulation, Non‑Switching

15

25

µA

Sleep Quiescent Current – VOUT

SYNC/MODE = 0V

1

2

µA

Shutdown Current – VIN

EN/UVLO = 0V, SS = 0V (Note 7)

0.5

2

µA

Current in UVLO – VIN

EN/UVLO = 1.05V

8

25

µA

EN/UVLO Operation

EN/UVLO Pin Rising Threshold

l

1.16

1.2

1.24

V

EN/UVLO Pin Falling Threshold

l

1.06

1.1

1.14

V

EN/UVLO Pin Input Leakage Current

EN/UVLO = 5V

1

50

nA

EN/UVLO Pin Shutdown Threshold

EN/UVLO Pin Voltage

l

0.2

0.75

1.05

V

Switch Operation

Average Inductor Current Limit

l

5.5

6.5

8.7

A

Peak Inductor Current Limit

8

9.5

11

A

IZERO Current

SYNC/MODE = 0V

–0.25

0

0.25

A

Reverse Inductor Current Limit

SYNC/MODE = 3.6V

–1.5

–1.2

–0.9

A

Lowside (B & C) MOSFET RDS(ON)

VIN = 3.6V, VOUT = 3.0V

18

mΩ

Highside (A & D) MOSFET RDS(ON)

VIN = VOUT = 3.6V

25

mΩ

Lowside MOSFETs Leakage Currents

VSW = 5.5V, EN/UVLO = 0

0.05

2

µA

Highside MOSFETs Leakage Current

VIN = VOUT = 5.5V, VSW1 = VSW2 = 0V, EN/UVLO = 0

0.1

10

µA

Oscillator Operation

Switching Frequency

RT to VIN or RT = 49.9kΩ

l

1.8

2.2

2.6

MHz

Switching Frequency Range

RT Programmable

l

0.4

4

MHz

Max Boost Duty Cycle (SW2 Low)

RT = VIN, FB or VOUT 5% Below Regulation Value

l

83

88

93

%

Min Duty Cycle (SW1 High)

RT = VIN, FB or VOUT 5% Above Regulation Value

l

0

%

SYNC/MODE Applied Clock Frequency

RT Chosen to Program a 25% Lower Frequency

l

0.5

4

MHz

SYNC/MODE High or Low Pulse Width

75

ns

SYNC/MODE Input High Logic Level

l

1.5

V

SYNC/MODE Input Low Logic Level

l

0.5

V

SYNC/MODE Input Leakage Current

SYNC/MODE = 5V

1

50

nA

Soft-Start

Soft‑Start Period (CSS Charge Time to 0.8V)

SS = VIN or CSS = 2.7nF

2.2

ms

External SS Regulation Voltage

Capacitor to GND Sets SS Time

1.0

V

Voltage GM Amp

Feedback Pin Input Current

FB = 1V

0

50

nA

VC Source/Sink Current

FB = 0.9V Source, FB = 1.1V Sink

±12

µA

Error Amplifier Transconductance

VC Current = ±4µA

110

µS

The l denotes the specifications which apply over the full operating junction

temperature range, otherwise specifications are at TA = 25°C (Note 2), PVIN = VIN = 3.6V, PVOUT = VOUT = 3.3V unless otherwise noted.