LTC2906 データシートの表示（PDF） - Linear Technology

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LTC2906

Precision Dual Supply Monitors with One Pin-Selectable Threshold and One Adjustable Input

Linear Technology 

LTC2906/LTC2907

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

temperature range, otherwise specifications are at TA = 25°C. VCC = V1 = 2.5V, VADJ = 0.55V, S1 = TOL = 0V, unless otherwise noted.

(Notes 2, 3, 4)

SYMBOL

PARAMETER

CONDITIONS

MIN TYP MAX UNITS

ITMR(UP)

ITMR(DOWN)

tRST

tRST

tUV

TMR Pull-Up Current

(LTC2907)

TMR Pull-Down Current (LTC2907)

Reset Time-Out Period (LTC2906)

Reset Time-Out Period (LTC2907)

VX Undervoltage Detect to

RST or RST

VTMR = 0V

VTMR = 1.4V

CTMR = 22nF

VX Less Than Reset Threshold VRTX

by More than 1%

q –1.5 –2.1 –2.7

µA

q 1.5

2.1

2.7

µA

q 140

200

260

ms

q 140

200

260

ms

150

µs

VOL

Output Voltage Low RST, RST

I = 2.5mA

q

0.15

0.4

V

I = 100µA; V1 and/or VCC = 1V (RST Only) q

0.05

0.3

V

VOH

Output Voltage High RST, RST

I = –1µA

(Notes 2, 5)

q VMAX – 1

V

Three-State Inputs S1, TOL

VIL

Low Level Input Voltage

VIH

High Level Input Voltage

VZ

Pin Voltage when Left in Hi-Z State

I = –10µA

I = 0µA

I = 10µA

q

0.4

V

q 1.4

V

q 0.7

V

0.9

V

q

1.1

V

IVPG

Programming Input Current (Note 6)

q

±25

µA

Note 1: Absolute Maximum Ratings are those values beyond which the life

of a device may be impaired.

Note 2: The greater of V1, VCC is the internal supply voltage (VMAX).

Note 3: All currents into pins are positive; all voltages are referenced to

GND unless otherwise noted.

Note 4: For reset thresholds test conditions refer to the voltage threshold

programming table in the Applications Information section.

Note 5: The output pins RST and RST have an internal pull-up to VMAX of

typically –6µA. However, an external pull-up resistor may be used when

faster rise time is required or for VOH voltages greater than VMAX.

Note 6: The input current to the three-state input pins are the pull-up and

the pull-down current when the pins are either set to V1 or GND

respectively. In the open state, the maximum leakage current to V1 or GND

permissible is 10µA.

TYPICAL PERFOR A CE CHARACTERISTICS

Specifications are at TA = 25°C unless otherwise noted.

5V Threshold Voltage vs

Temperature

4.75

4.70

5%

4.65

4.60

4.55

7.5%

4.50

4.45

10%

4.40

4.35

–50 –25 0 25 50

TEMPERATURE (°C)

75 100

29067 G01

3.3V Threshold Voltage vs

Temperature

3.12

5%

3.07

3.02

7.5%

2.97

10%

2.92

2.87

–50 –25 0 25 50 75 100

TEMPERATURE (°C)

29067 G02

2.5V Threshold Voltage vs

Temperature

2.375

5%

2.325

2.275

7.5%

2.225

10%

2.175

–50 –25

0

25

50

TEMPERATURE (°C)

75 100

29067 G03

29067f

3

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