LTC3252 データシートの表示（PDF） - Linear Technology

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LTC3252

Dual, Low Noise, Inductorless Step-Down DC/DC Converter

Linear Technology 

LTC3252

PI FU CTIO S

C2– (Pin 8): Flying Capacitor 2 Negative Terminal (C2).

OUT2 (Pin 9): Regulated Output Voltage 2. OUT2 is

disconnected from VIN when in shutdown. Bypass OUT2

with a low ESR ceramic capacitor to GND (CO2). See

Output Capacitor Selection section for size requirements.

C2+ (Pin 10): Flying Capacitor 2 Positive Terminal (C2).

EN2 (Pin 11): Input Enable Pin 2. When EN2 is high, OUT2

is enabled. When EN2 is low OUT2 is shut down.

FB2 (Pin 12): Feedback Input Pin 2. An output divider

should be connected from OUT2 to FB2 to program the

output voltage.

W

W

SI PLIFIED BLOCK DIGRAM

OVERTEMPERATURE

VIN 3

EN1

EN2

2

11

SWITCH

CONTROL

–

BURST

DETECT

CIRCUIT

+

–

+

SPREAD SPECTRUM

OSCILLATOR

CHARGE

PUMP 1

4 C1+

5 OUT1

6 C1–

1 FB1

CHARGE

PUMP 2

10 C2+

9 OUT2

8 C2–

12 FB2

7

GND

3252 SBD

3252f

5

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