LTC3313

3

Rev. 0

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ELECTRICAL CHARACTERISTICS The

l

denotes the specifications which apply over the specified operating

temperature range, otherwise specifications are at TA = 25°C (Notes 2, 3). VIN = 3.3V, VEN = VIN, MODE/SYNC = 0V, unless otherwise noted.

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

VIN Quiescent Current in Shutdown

(Note 4)

VEN = 0.1V

1.3

1

2.0

2

mA

μA

EN Threshold

EN Hysteresis

VEN Rising

l

0.375

0.4

60

0.425

V

mV

EN Pin Leakage Current

VEN = 0.4V

±20

nA

Voltage Regulation

Regulated Feedback Voltage (VFB)

l

495

500

505

mV

Feedback Pin Input Current

VFB = 0.5V

±20

nA

Error Amp Transconductance

1

ms

Error Amp Source/Sink Current

±45

µA

Top Switch Current Limit

VOUT/VIN ≤ 0.2, Current Out of SW

l

18

21

24

A

Bottom Switch Current Limit (IVALLEY(MAX))

Current Out of SW

l

15

17

19

A

Top Switch ON-Resistance

8

mΩ

Bottom Switch ON-Resistance

3

mΩ

SW Leakage Current

VEN = 0.1V

±100

nA

VITH to IPEAK Current Gain

31

A/V

Minimum On-Time

l

35

60

ns

Maximum Duty Cycle

l

100

%

Power Good/Soft-Start/Temp Monitor

PGOOD Rising Threshold

PGOOD Hysteresis

As a Percentage of the Regulated VOUT

l

l

97

0.5

98

1

99

1.5

%

%

Overvoltage Rising Threshold

Overvoltage Hysteresis

As a Percentage of the Regulated VOUT

l

l

106

1

110

2.5

114.5

3.5

%

%

PGOOD Leakage Current

VPGOOD = 5.5V

20

nA

PGOOD Pull-Down Resistance

VPGOOD = 0.1V

12

20

Ω

PGOOD Delay

125

µs

PGOOD Input Threshold

PGOOD Input Hysteresis

Multiphase Mode, Rising

l

390

440

130

490

mV

mV

Soft-Start Charge Current

VSSTT = 0.5V

l

7

10

13

µA

Temp Monitor Slope

4

mV/°C

Oscillator and MODE/SYNC

Switching Frequency Range

RT-Programmed

l

0.5

5

MHz

Switching Frequency

RT = 274k

l

1.8

2

2.2

MHz

Synchronization Frequency Range

RT = VIN

l

0.5

2.25

MHz

Default Frequency

RT = VIN

l

1.8

2

2.2

MHz

SYNC Level High on MODE/SYNC

SYNC Level Low on MODE/SYNC

l

l

1.2

0.4

V

V

Minimum MODE/SYNC Pulse Width

40

ns

MODE/SYNC Input Resistance

200

kΩ