LT3667EUDD View Datasheet(PDF) - Linear Technology

Part Name

Description

Manufacturer

LT3667EUDD

Iq= 50uA at 12Vin to 5V, 3.3V and 2.5V with No Load / 40V 400mA Step-Down Switching Regulator with Dual Fault Protected LDOs

Linear Technology 

LT3667

BLOCK DIAGRAM (QFN)

VOUT2

C4

R3

R4

R6

R5

15

IN2

13

FB2

ERROR

AMPLIFIER

14 OUT2

EN2/

ILIM2

16

LDO

DRIVER

80Ω

CURRENT LIMIT

AMPLIFIER

0.72V

+

–

+

0.88V

0.4V –

PG

18

+

1V –

LDO

DISABLE

8

FB3

ERROR

AMPLIFIER

–

+

LDO

DRIVER

0.72V

CURRENT LIMIT

AMPLIFIER

6

IN3

OUT3

7

EN3/

80Ω

ILIM3

17

0.4V

LDO

DISABLE

1V

VOUT3

C5

PG2

11

PG3

12

IN1

VIN1

20

C1

UVLO1

19

EN

3

0.8V

INTERNAL REF

1.2V

+–

1.08V

1.32V

PG1

9

ERROR

AMPLIFIER

+ VC

–

–

+

SLOPE COMP

OSCILLATOR

250kHz TO 2.2MHz

Burst Mode

DETECT

4M

GND

FB1

25 10

R2 R1

RT

SYNC

4

2

RT

BD

5

BOOST

DIODE

R

Q

S

B00ST

1

SW

24

DA

23

C2

L1

C3

D1

CATCH DIODE

CURRENT LIMIT

VOUT1

3667 BD QFN

14

For more information www.linear.com/LT3667

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