LTC3302

3

Rev. 0

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ELECTRICAL CHARACTERISTICS

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Input Supply

Operating Supply Voltage (VIN)

l

2.25

5.5

V

VIN Undervoltage Lockout

VIN Undervoltage Lockout Hysteresis

VIN Rising

l

2.0

2.1

150

2.2

V

mV

VIN Quiescent Current in Shutdown

VEN = 0.1V

1

2

µA

VIN Quiescent Current (Note 3)

Burst Mode Operation, Sleeping

All Modes, Not Sleeping

80

1.2

120

2

µA

mA

Enable Threshold

Enable Threshold Hysteresis

VEN Rising

l

0.375

0.4

50

0.425

V

mV

EN Pin Leakage

VEN = 0.5V

−20

20

nA

Voltage Regulation

Regulated FB or Output Voltage (FB or VOUT)

% of Selected FB or VOUT,

0.5V ≤ FB or VOUT ≤ 3.65V

l

99

100

101

%

Feedback Voltage Line Regulation

VIN = MAX (2.25V, VOUT + 150mV) to 5.5V

0.015

0.05

%/V

Minimum On Time (tON,MIN)

VIN = 5.5V

l

27

50

ns

Maximum Duty Cycle

l

100

%

Top Switch ON-Resistance

85

mΩ

Bottom Switch ON-Resistance

30

mΩ

Top Switch Current Limit (IPEAKMAX)

VOUT/VIN ≤ 0.2

2.9

3.2

3.5

A

Bottom Switch Current Limit (IVALLEYMAX)

2.7

A

Bottom Switch Reverse Current Limit (IREVMAX)

Forced Continuous Mode

–2.0

–1.0

–0.5

A

SW Leakage Current

VEN = 0.1V

–100

100

nA

Power Good and Soft-Start

PGOOD Rising Threshold

PGOOD Hysteresis

As a Percentage of the Regulated VOUT

l

l

97

0.7

98

1.2

99

1.7

%

%

Overvoltage Rising Threshold

Overvoltage Hysteresis

As a Percentage of the Regulated VOUT

l

l

107

1

110

2.2

114

3.5

%

%

PGOOD Delay

120

µs

PGOOD Pull-Down Resistance

VPGOOD = 0.1V

10

20

Ω

PGOOD Leakage Current

VPGOOD = 5.5V

20

nA

Soft-Start Duration

l

0.25

1

3

ms

Default Oscillator Frequency

LTC3302A

l

1.85

2

2.15

MHz

LTC3302C

l

5.55

6

6.45

MHz

Oscillator and MODE/SYNC

Frequency Synchronization Range

Percentage of Nominal Frequency Range

l

−20

20

%

Minimum SYNC High or Low Pulse Width

l

40

ns

SYNC Pulse Voltage Levels

Level High

Level Low

l

l

1.2

0.4

V

V

MODE/SYNC No Clock Detect Time

Percentage of Nominal Period

50

%

MODE/SYNC Pin Threshold

For Programming Forced Continuous Mode

For Programming Pulse-Skipping Mode

For Programming Burst Mode Operation

l

l

l

1.0

VIN – 0.1

Float

0.1

VIN – 1.0

V

V

V

The l denotes the specifications which apply over the specified operating

junction temperature range (Note 2), otherwise specifications are at TA = 25°C; VIN = 4V, VEN = VIN, MODE/SYNC = Float, unless

otherwise noted.