LTC2908 データシートの表示（PDF） - Linear Technology

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LTC2908

Precision Six Input Supply Monitor

Linear Technology 

LTC2908

PIN FUNCTIONS (TS8 Package/DDB8 Package) LTC2908-C1

V1 (Pin 1/Pin 4): Voltage Input 1. V1 is the internal VCC.

The operating voltage on this pin shall not exceed 6V.

When in normal operation, this pin draws approximately

22μA. Bypass this pin to ground with a 0.1μF (or greater)

capacitor.

VADJ5 (Pin 2/Pin 3): Adjustable Voltage Input 5. See Table 1

for recommended ADJ resistors values.

RST (Pin 3/Pin 4): Reset Logic Output. Pulls low when

any voltage input is below the reset threshold and is held

low for 200ms after all voltage inputs are above threshold.

This pin has a weak pull-up to VCC and may be pulled above

VCC using an external pull-up.

GND (Pin 4/Pin 1): Device Ground.

VADJ4 (Pin 5/Pin 8): Adjustable Voltage Input 4.

See Table 1 for recommended ADJ resistors values.

VADJ3 (Pin 6/Pin 7): Adjustable Voltage Input 3.

See Table 1 for recommended ADJ resistors values.

VADJ2 (Pin 7/Pin 6): Adjustable Voltage Input 2.

See Table 1 for recommended ADJ resistors values.

VADJ1 (Pin 8/Pin 5): Adjustable Voltage Input 1.

See Table 1 for recommended ADJ resistors values.

Exposed Pad (Pin 9, DDB8 Only): Exposed pad may be

left open or connected to device ground.

BLOCK DIAGRAMS

V1

POWER

DETECT

VCC

V2

V3

V4

VADJ1

VADJ2

GND

–

C1

+

–

C2

+

–

C3

+

–

C4

+

–

C5

+

–

C6

+

BANDGAP

REFERENCE

8

LTC2908-A1/LTC2908-B1

VCC

6μA

RST

200ms

RESET PULSE

GENERATOR

2908 BD

2908fd

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