LTC2930H 查看數據表（PDF） - Linear Technology

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LTC2930H

Configurable Six Supply Monitor with Adjustable Reset Timer, Manual Reset

Linear Technology 

LTC2930

TYPICAL PERFORMANCE CHARACTERISTICS

Reset Timeout Period vs CRT

10

TA = 25°C

1

100m

10m

1m

100μ

10μ

10p 100p

1n 10n

CRT (F)

100n 1μ

2930 G10

Voltage Output Low

vs Output Sink Current (RST)

500

V1 = 5V

V2 = 3V

400

125°C

85°C

300

25°C

200

–40°C

100

0

0

2

4

6

8

10

ISINK (mA)

2930 G12

ISINK vs Supply Voltage (RST)

15

TA = 25°C

12

VOL = 0.4V

9

VOL = 0.2V

6

3

0

0

1

2

3

4

5

V1 OR V2 (V)

2930 G11

RST Pull-Up Current vs V2

18

TA = 25°C

15

12

9

6

VRT33

VRT30

3 VRT25

0

2.0 2.5 3.0 3.5 4.0

V2 (V)

4.5 5.0

2930 G13

PIN FUNCTIONS

V5 (Pin 1): Adjustable Voltage Input 5. High impedance

comparator input with 0.5V typical threshold. See

Applications Information for details. Tie to V1 if unused.

V3 (Pin 2): Voltage Input 3. Select from 2.5V, 1.8V, 1.5V,

or ADJ. See Applications Information for details. Tie to

V1 if unused.

V1 (Pin 3): Voltage Input 1. Select from 5V or 3.3V. See

Applications Information for details. The greater of V1 or

V2 is also VCC for the device. Bypass this pin to ground

with a 0.1μF (or greater) capacitor.

CRT (Pin 4): Reset Timeout Capacitor. Attach an external

capacitor (CRT) to GND to set a reset timeout of 2ms/nF.

Leaving the pin open generates a minimum delay of

approximately 25μs. A 47nF capacitor generates a 94ms

reset delay time.

RST (Pin 5): Reset Output. Logic output with weak 6μA

pull-up to V2. Pulls low when any voltage input is below

the reset threshold and held low for the configured delay

time after all voltage inputs are above threshold. Use an

external pull-up to pull greater than V2. Leave open if

unused.

2930fa

5

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