LTC2902-1IGN datasheet(3/16 Pages) LINER

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LTC2902

2902f

The q denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VCC = 5V, unless otherwise noted. (Note 3)

ELECTRICAL CHARACTERISTICS

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

a device may be impaired.

Note 2: All voltage values are with respect to GND.

Note 3: The greater of V1, V2 is the internal supply voltage (VCC).

Note 4: Under static no-fault conditions, V1 will necessarily supply quiescent

current. If at any time V2 is larger than V1, V2 must be capable of supplying

the quiescent current, programming (transient) current and reference load

current.

Note 5: The output pins RST and COMPX have internal pull-ups to V2 of

typically 6

µA. However, external pull-up resistors may be used when faster

rise times are required or for VOH voltages greater than V2.

Note 6: The push-pull RST output pin on the LTC2902-2 is

actively pulled up

to V2.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VRTAN

– ADJ Reset Threshold

V4 Input Threshold

–18

VCC

Minimum Internal Operating Voltage

RST, COMPX in Correct Logic State;

VCC Rising Prior to Program

VCCMINP

Minimum Required for Programming

VCC Rising

2.42

VCCMINC

Minimum Required for Comparators

VCC Falling

2.32

VREF

Reference Voltage

VCC ≥ 2.3V, IVREF = ±1mA, CREF ≤ 1000pF

T0 Low, T1 Low

1.192

1.210

1.228

T0 Low, T1 High

1.160

1.178

1.195

T0 High, T1 Low

1.128

1.146

1.163

T0 High, T1 High

1.096

1.113

1.130

VPG

Programming Voltage Range

VCC ≥ VCCMINP

0VREF

IVPG

VPG Input Current

VPG = VREF

±20

IV1

V1 Input Current

V1 = 5V, IVREF = 12µA, (Note 4)

µA

IV2

V2 Input Current

V2 = 3.3V

0.8

µA

IV3

V3 Input Current

V3 = 2.5V

0.52

1.2

µA

V3 = 0.55V (ADJ Mode)

–15

IV4

V4 Input Current

V4 = 1.8V

0.34

0.8

µA

V4 = 0.55V (ADJ Mode)

–15

V4 = –0.05V (–ADJ Mode)

–15

ICRT(UP)

CRT Pull-Up Current

VCRT = 0V

–1.4

–2

–2.6

µA

ICRT(DN)

CRT Pull-Down Current

VCRT = 1.3V

µA

tRST

Reset Time-Out Period

CRT = 1500pF

579

tUV

VX Undervoltage Detect to RST or COMPX

VX Less Than Reset Threshold VRTX

150

µs

by More Than 1%

VOL

Output Voltage Low RST, COMPX

ISINK = 2.5mA; V1 = 3V, V2 = 3V;

0.15

0.4

V3, V4 = 0V; VPG = 0V

ISINK = 100µA; V2 = 1V; V1, V3, V4 = 0V

0.05

0.3

ISINK = 100µA; V1 = 1V; V2, V3, V4 = 0V

0.05

0.3

VOH

Output Voltage High RST, COMPX (Note 5)

ISOURCE = 1µA

V2 – 1

VOH

Output Voltage High RST (LTC2902-2)

ISOURCE = 200µA

0.8 • V2

(Note 6)

Digital Inputs T0, T1, RDIS

VIL

T0, T1 Low Level Input Voltage

VCC = 3.3V to 5.5V

0.3VCC

VIH

T0, T1 High Level Input Voltage

VCC = 3.3V to 5.5V

0.7VCC

IINTOL

T0, T1 Input Current

T0 = 0V, T1 = VCC

±0.1

±1

µA

VIL

RDIS Input Threshold Low

VCC = 3.3V to 5.5V

0.4

VIH

RDIS Input Threshold High

VCC = 3.3V to 5.5V

1.6

IRDIS

RDIS Pull-Up Current

VRDIS = 0V

–10

µA

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