SMM152 datasheet(7/24 Pages) SUMMIT

7 / 24 page

SMM151/152

Summit Microelectronics, Inc

2131 3.0 1/20/2010

DC OPERATING CHARACTERISTICS (CONTINUED)

TA= 0°C to +70°C, VDD = 2.7V to 5.5V, VCS = 4.0V to 15V, unless otherwise noted. All voltages are relative to GND.

Note 6.

Symbol

Parameter

Notes

Min.

Typ.

Max

Unit

IAIT

Address Input Tristate

Maximum Leakage – High Z

-3.0

+3.0

μA

OV/UV

Monitor Voltage Range

COMP1 and COMP2 pins

VDD

VHYST

COMP1/2 DC Hysteresis

COMP1 and COMP2 pins,

VTH-VTL

(see Note 1)

RPull-Up

Input Pull-Up Resistors

See Pin Descriptions, Note 5

VREF=1.25V

1.24

1.25

1.26

VREF

Internal COMP1/2 Reference

VREF=0.5V

0.495

0.500

0.505

VM+ - VM- = 1.2V, Note 4

-1.0

±0.75

+1.0

MARGACC

Margin Accuracy

VM+ - VM- = 2.5V, Note 4

-1.0

±0.75

+1.0

VMADC

Voltage Monitor ADC

Measure Range

VM+ - VM-

VDD

RVM

VM+, VM- Input Resistance

Note 5

CMRRVM

Voltage Sense Common

Mode Rejection Ratio

VCM (VM+, VM-) = 0.5V – VDD, Note 5

Minimum CS+ - CS- voltage

CSADC

Current Monitor ADC

Measure Range

Maximum CS+ - CS- voltage

100

CSADC ≥ 50mV, Note 2

-2

CSACC

Current Sense Accuracy

CSADC < 50mV, Note 2

-1

VCM (CS+, CS-) = 5.0V, Note 5

100

CMRRCS

Current Sense Common

Mode Rejection Ratio

VCM (CS+, CS-) = 12V, Note 5

Note 1:

VHYST is measured with a 1.25V external voltage and is determined by subtracting Threshold Low from Threshold High, VTH-VTL while

monitoring the FAULT# pin state. Actual DC Hysteresis is derived from the equation: (VIN(COMP1/2)/VREF)(VHYST). For example, if VIN(COMP1/2)/=2.5V

and VREF=1.25V then Actual DC Hysteresis= (2.5V/1.25V)(0.003V)=6mV.

Note 2: Current sense accuracy depends on the current sense resistor tolerance. Kelvin sensing of the voltage drop across this resistor must be

used to guarantee accuracy. Accuracy at the low range of the current monitor ADC will be adversely impacted by offset errors.

Note 3: It is recommended that ADC reads occur with a frequency of not more than 250Hz.

Note 4: Voltage accuracy is only guaranteed for factory-programmed settings. Changing voltage from the value reflected in the customer specific

CSIR code may result in inaccuracies exceeding those specified above.

Note 5: Not 100% Production tested. Guaranteed by Design and/or Characterization.

Note 6: All electrical parameters are guaranteed to function over the stated VDD, VCS and temperature range. Electrical parameters not specified

as "guaranteed by design" are tested with a VDD voltage required of the specific application. For example, if the device is to be operated at 3.3V

and VCS supply of 12V, it is tested with a VDD supply of 3.3V, +-10% and a VCS supply of 12V, +-10%.

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