LT8614 datasheet(3/24 Pages) AD

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LTC3315A

Rev. A

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ELECTRICAL CHARACTERISTICS

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VIN Undervoltage Lockout

VIN Undervoltage Lockout Hysteresis

VIN Rising

2.05

2.15

150

2.25

VIN Quiescent Current in Shutdown

1.2

µA

VIN Quiescent Current with One Buck Enabled

Burst Mode, Buck in Regulation, Sleeping

All Modes, Not Sleeping (Note 4)

1.5

2.3

µA

VIN Quiescent Current with Both Bucks Enabled

Burst Mode, Bucks in Regulation, Sleeping

All Modes, Not Sleeping (Note 4)

2.8

110

4.2

µA

Enable Threshold

Enable Threshold Hysteresis

VEN Rising

375

400

425

EN Pin Leakage

VEN = 5.5V

±20

Voltage Regulation, Buck 1 and Buck 2

Regulated Feedback Voltage (VFB)

495

500

505

Feedback Voltage Line Regulation

2.25V ≤ VIN ≤ 5.5V

0.015

0.05

%/V

Feedback Pin Input Current

VFB = 500mV

±20

PMOS Current Limit (ILIM)

Current out of SW, VOUT/VIN ≤ 0.2

2.9

3.2

3.5

NMOS Current Limit (IVALLEY)

Current out of SW

2.4

2.7

3.0

NMOS Reverse Current Limit

Current into SW, Forced Continuous

0.5

1.5

PMOS ON-Resistance

mΩ

NMOS ON-Resistance

mΩ

SW Leakage Current

Shutdown, VIN = 5.5V

±200

Minimum On Time

VIN = 5.5V

Maximum Duty Cycle

100

Overtemperature Shutdown (OT)

Overtemperature Shutdown Hysteresis

Temperature Rising (Note 5)

165

°C

Power Good/Soft-Start

PGOOD Rising Threshold

PGOOD Hysteresis

As a Percentage of the Regulated VOUT

0.6

1.1

1.6

Overvoltage Rising Threshold

Overvoltage Hysteresis

As a Percentage of the Regulated VOUT

107

110

2.2

114

3.5

PGOOD Delay

120

µs

PGOOD Leakage Current

VPGOOD = 5.5V

PGOOD Pull-Down Resistance

VPGOOD = 0.1V

Soft-Start Time

(Note 6)

0.25

Oscillator and MODE/SYNC

Internal Oscillator Frequency (fSW)

1.85

2.15

MHz

Synchronization Frequency Range

MHz

Minimum SYNC High or Low Pulse Width

SYNC Level High on MODE/SYNC

SYNC Level Low on MODE/SYNC

1.2

0.4

MODE/SYNC No Clock Detect Time

µs

MODE/SYNC Pin Threshold

For Programming Pulse Skipping Mode

For Programming Burst Mode

VIN – 0.1

0.1

The l denotes the specifications which apply over the full operating

junction temperature range, otherwise specifications are at TA = 25°C (Notes 2, 3). VIN = 3.3V unless otherwise specified.

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 LTC3315A is tested under pulsed load conditions such

that TJ ≈ TA. The LTC3315AE 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,

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