LT3469

4

3469f

TYPICAL PERFOR A CE CHARACTERISTICS

Output Current

vs Differential Input Voltage

15

18

0

1.0

2.5

21

27

30

3469 G01

0.5

2.0

100

°C

25

°C

–50

°C

1.5

24

33

36

DIFFERENTIAL INPUT VOLTAGE (mV)

–50

0

10

20

30

30

3469 G02

–10

–20

–5

5

15

25

–15

–25

–30

–30

–10

10

–40

40

–20

0

20

50

100

°C

–50

°C

25

°C

15

100

150

35

3469 G14

50

0

20

25

30

250

200

–50

°C

25

°C

100

°C

PI FU CTIO S

least 5nF of capacitive load at the output in a gain of 10

configuration. Capacitive loads up to 300nF can be con-

nected to this pin. Piezo actuators below 5nF can be driven

if capacitance is placed in parallel to bring the total

capacitance to 5nF.

FB (Pin 2): Feedback Pin. Reference voltage is 1.23V.

Connect feedback resistor divider here.

GND (Pin 4): Ground Pin. Connect directly to local ground

plane.

SW (Pin 5): Switch Pin. Connect inductor here. Minimize

trace area at this pin to reduce EMI.

capacitance here.

BLOCK DIAGRA

–

+

SW

4

5

2

FB

1.23V

7

1

+IN

–IN

OUT

GND

3469 F01

Q1

A1

SWITCH

CONTROLLER

6

3

–

+

8

Figure 1. LT3469 Block Diagram