LTC3306

3

Rev. 0

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ELECTRICAL CHARACTERISTICS The

l

denotes the specifications which apply over the full operating

temperature range (Note 2), otherwise specifications are at TA = 25°C. VIN = 4V, VEN = VIN unless otherwise noted.

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Input Supply

Operating Supply Voltage (VIN)

l

2.25

5.5

V

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

40

1.2

60

2

µA

mA

Enable Threshold

Hysteresis

VEN Rising

l

0.375

0.400

50

0.425

V

mV

EN Pin Leakage

VEN = 0.5V

±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

0.02

0.1

%/V

Feedback Voltage Load Regulation

0.01

0.1

%/A

Minimum On-Time (tON,MIN)

VIN = 5.5V

l

22

42

ns

Maximum Duty Cycle

l

100

%

Top Switch ON-Resistance

Bottom Switch ON-Resistance

100

30

mΩ

mΩ

Top Switch Current Limit (IPEAKMAX)

2.5

2.75

3.0

A

Bottom Switch Current Limit (IVALLEYMAX)

2

2.3

2.6

A

Bottom Switch Reverse Current Limit (IREVMAX) LTC3306C

–1.35

–0.9

–0.4

A

SW Leakage Current

±100

nA

Power Good and Soft-Start

PGOOD Threshold (Rising)

Hysteresis

Percentage of Regulated VOUT

l

l

97

0.7

98

1.2

99

1.7

%

%

VOUT Overvoltage Threshold (Rising)

Hysteresis

Percentage of Regulated VOUT

l

l

107

1

110

2.2

114

3.5

%

%

PGOOD Delay

100

µs

PGOOD Pull-Down Resistance

VPGOOD = 0.1V

10

20

Ω

PGOOD Leakage

VPGOOD = 5.5V

20

nA

Soft-Start Duration

VOUT Rising from 0V to PGOOD Threshold

l

0.25

1

3

ms

Oscillator

Default Oscillator Frequency

LTC3306A, LTC3306C

1.9

2

2.1

MHz

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 LTC3306AA is tested under pulsed load conditions such

that TJ ≈ TA. The LTC3306CA is guaranteed to meet specifications from

0°C to 85°C junction temperature. Specifications over the –40°C to

125°C operating junction temperature range are assured by design,

characterization, and correlation with statistical process controls. The

LTC3306CA is guaranteed over the –40°C to 125°C operating junction

temperature range.

High junction temperatures degrade operating lifetimes; operating lifetime

is derated for junction temperatures above 125°C. Note that 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. The junction