LTC1517-5 Просмотр технического описания (PDF) - Linear Technology

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LTC1517-5

Micropower, Regulated 5V Charge Pump in a 5-Pin SOT-23 Package

Linear Technology 

LTC1517-5

TYPICAL APPLICATIONS

Low Noise Boosted 5V Supply

0.1µF

VIN

3.3V TO 5V

5

4

C1–

C1+

LTC1517-5

VIN GND VOUT

1

2

3

1µF

470Ω

Q1, Q2: 2N3904

3.3µF

Q2

A 50mV/DIV

AC COUPLED

A

470Ω

1µF

VOUT

B

2mV/DIV

Q1 B VOUT = 5V

AC COUPLED

IOUT = 1mA (VIN ≥ 3.3V)

1µF

1µF IOUT = 10mA (VIN ≥ 3.6V)

1517 TA04a

VRIPPLE < 2mVP-P

VIN = 3.3V

IOUT = 1mA

50µs/DIV

1517-5 TA04b

VIN

2.7V TO 5V

Generating 5V and a Negative Supply

3.3µF

0.1µF

5

4

C1–

C1+

LTC1517-5

VIN GND VOUT

1

2

3

VOUT = 5V ± 4%

IOUT = 10mA (2.7V ≤ VIN ≤ 5V)

3.3µF

IOUT = 20mA (3V ≤ VIN ≤ 5V)

470Ω

8.2k

Q1

Q2

0.1µF

3.3k

**

– VOUT = – 1.4V TO – 3.5V

1517 TA05 – IOUT = 0mA to 5mA

3.3µF

*

*CENTRAL SEMICONDUCTOR CMPSH-35 DUAL SCHOTTKY

**OPTIONAL CIRCUITRY FOR MAINTAINING – VOUT WITH LOW

VOUT LOADS

Q1, Q2: 2N3904

6

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