LTC1699 datasheet(3/20 Pages) LINER

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LTC1699 Series

ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. 2.7V ≤ VCC ≤ 5.5V (Notes 3, 4) unless otherwise stated.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

ISK1

SDA, PGOOD, CPU_ON, IO_ON,

≤ VPIN ≤ 2.7V

519

CLK_ON Sink Current at VCC = 2.7V

ISK2

SDA, PGOOD, CPU_ON, IO_ON,

≤ VPIN ≤ 5.5V

150

CLK_ON Sink Current at VCC = 5.5V

ILKG

PGOOD, CPU_ON, IO_ON,

≤ VPIN ≤ 5.5V

±2

µA

CLK_ON Leakage Current

IPU

VRON Pull-Up Current

VPIN = 0

–1

– 2.5

– 7

µA

Timing (Note 5)

fSMB

SMBus Operating Frequency

100

KHz

tBUF

Bus Free Time Between Stop/Start

4.7

µs

tHD:STA

Hold Time After (Repeated) Start

4.0

µs

tSU:STA

Repeated Start Setup Time

4.7

µs

tSU:STO

Stop Condition Setup Time

4.0

µs

tHD:DAT

Data Hold Time

300

tSU:DAT

Data Setup Time

250

tLOW

Clock Low Period

4.7

µs

tHIGH

Clock High Period

4.0

µs

SCL, SDA Fall Time

0.9VCC to 0.65V

300

SCL, SDA Rise Time

0.65V to 2.25V

1000

tSSH

SEL to SENSE High (Note 6)

Toggle SEL to Switch from Min VOUT to Max VOUT,

500

VFB = 0.8V

tSSL

SEL to SENSE Low (Note 6)

Toggle SEL to Switch from Max VOUT to Min VOUT,

500

VFB = 0.8V

tSPL

SEL Toggling to PGOOD Low

Toggle SEL to Select New Code

160

500

CL = 100pF, 10kΩ Pull-Up, S2 in Figure 1

tPH

Stop Bit to CPU_ON, IO_ON

CL = 100pF, 10kΩ Pull-Up, S2 in Figure 1

µs

or CLK_ON High (Note 7)

tPL

Stop Bit to CPU_ON, IO_ON

CL = 0.1µF, 10kΩ Pull-Up, S1 in Figure 1

µs

or CLK_ON Low (Note 7)

tPPL

Stop Bit to PGOOD Low (Note 6)

CL = 100pF, 10kΩ Pull-Up, S2 in Figure 1

250

tVH

VRON High to CPU_ON, IO_ON

CL = 100pF, 10kΩ Pull-Up, S2 in Figure 1

µs

or CLK_ON High

tVL

VRON Low to CPU_ON, IO_ON,

CL = 0.1µF, 10kΩ Pull-Up, S1 in Figure 1

µs

CLK_ON Low

tVPL

VRON Low to PGOOD Low

CL = 100pF, 10kΩ Pull-Up, S2 in Figure 1

130

500

tPGL

PGOOD Low Duration

CL = 100pF, 10kΩ Pull-Up, S2 in Figure 1

µs

Note1: Absolute Maximum Ratings are those values beyond which the life

of a device may be impaired.

Note 2: The LTC1699-80E, LTC1699-81E and LTC1699-82E are

guaranteed to meet performance specifications from 0

°C to 70°C.

Specifications over the – 40

°C to 85°C operating temperature range are

assured by design, characterization and correlation with statistical process

controls.

Note 3: All currents into device pins are positive; all currents out of device

pins are negative. All voltages are referenced to device ground unless

otherwise specified.

Note 4: All typical numbers are given for VCC = 5V and TA = 25°C.

Note 5: These parameters are guaranteed by design and are not tested in

production. SMBus timing is referenced to VIL and VIH levels.

Note 6: Dominated by the switching regulator. The delay due to the

LTC1699-80, LTC1699-81 or LTC1699-82 is typically 500ns.

Note 7: Measured from the rising edge of SDA during Data High

acknowledgement.

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