LM2702 datasheet(7/21 Pages) NSC

7 / 21 page

Electrical Characteristics (Continued)

Specifications in standard type face are for T

J = 25˚C and those with boldface type apply over the full Operating Tempera-

ture Range (T

J = −40˚C to +125˚C). Unless otherwise specified, VIN =2.2V and AVIN = 8V, RCOM =RGAMMA =50

Ω,C

COM =

GAMMA = 1nF.

Gamma Buffer

Symbol

Parameter

Conditions

Min

(Note 5)

Typ

(Note 6)

Max

(Note 5)

Units

Supply Voltage

412

Is+

Supply Current (Amplifier +

Buffer)

Vo=AV

IN/2, No Load

2.2

Output Short Circuit Current

Source

Sink

Electrical Characteristics

Specifications in standard type face are for T

J = 25˚C and those with boldface type apply over the full Operating Tempera-

ture Range (T

J = −40˚C to +125˚C). Unless otherwise specified, VIN =2.2V and AVIN = 8V, RCOM =RGAMMA =50

Ω,C

COM =

GAMMA = 1nF.

PMOS Switch Logic Control

Symbol

Parameter

Conditions

Min

(Note 5)

Typ

(Note 6)

Max

(Note 5)

Units

DELAY

Delay Current

5.1

5.7

6.1

µA

DSON

PMOS Switch ON Resistance

7.3

Ω

SWO

PMOS Switch Current

Switch ON

SWI

PMOS Switch Input Current

SWC = 0V, SWO Open, SWI

= 30V

µA

SWC = 1.7V, SWO Open,

SWI = 30V

118

SWC

Switch ON

1.5

1.1

Switch OFF

1.1

0.7

Note 1: The maximum allowable power dissipation is a function of the maximum junction temperature, TJ(MAX), the junction-to-ambient thermal resistance, θJA,

and the ambient temperature, TA. See the Electrical Characteristics table for the thermal resistance of various layouts. The maximum allowable power dissipation

at any ambient temperature is calculated using: PD (MAX) = (TJ(MAX) −TA)/θJA. Exceeding the maximum allowable power dissipation will cause excessive die

temperature, and the regulator will go into thermal shutdown.

Note 2: Absolute maximum ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions for which the device is intended to

be functional, but device parameter specifications may not be guaranteed. For guaranteed specifications and test conditions, see the Electrical Characteristics.

Note 3: The human body model is a 100 pF capacitor discharged through a 1.5k

Ω resistor into each pin. The machine model is a 200pF capacitor discharged

directly into each pin.

Note 4: Vcom pin is rated for 1.5kV Human Body Model and 150V Machine Model.

Note 5: All limits guaranteed at room temperature (standard typeface) and at temperature extremes (bold typeface). All room temperature limits are 100%

production tested or guaranteed through statistical analysis. All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality

Control (SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL).

Note 6: Typical numbers are at 25˚C and represent the most likely norm.

Note 7: Duty cycle affects current limit due to ramp generator. Current limit is at 0% duty cycle and will decrease with higher duty cycles. See Typical Performance

Characteristics for a graph of Power Switch Current Limit vs. VIN and Power Switch Current Limit vs. Temp.

Note 8: See the graph titled "RDSON vs. VIN" for a more accurate value of the power switch RDSON.

Note 9: Bias current flows into FB pin.

Note 10: Refer to the graphs titled "Input Offset Voltage vs. Common Mode Voltage".

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