7

LTC1574

LTC1574-3.3/LTC1574-5

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-

tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.

APPLICATIO S I FOR ATIO

on no-load supply current. Schottky diodes such as

MBR0530, BAS85 and BAT84 work well. Another more

serious effect of the protection diode leakage is that at no

load with nothing to provide a sink for this leakage

current, the output voltage can potentially float above the

maximum allowable tolerance. To prevent this from

and ground with a value low enough to sink the maximum

possible leakage current.

Low Noise, High Efficiency 3.3V Regulator

TYPICAL APPLICATIO S

5

100pF

2, 4, 13, 15

6

12

11

7

10

3, 14

50

0.1

µF

6.8nF

22

µF*

25V

× 2

1574 TA03

3.3V

450mA

56k

33k

4V TO 12.5V

GND

LTC1574

SHDN

SW

* AVX TPSD226K025

** AVX TPSD107K010

100

µF**

10V

× 2

+

+

Dimension in inches (millimeters) unless otherwise noted.

PACKAGE DESCRIPTIO

S Package

16-Lead Plastic Small Outline (Narrow 0.150)

(LTC DWG # 05-08-1610)

0.016 – 0.050

(0.406 – 1.270)

0.010 – 0.020

(0.254 – 0.508)

× 45°

0

° – 8° TYP

0.008 – 0.010

(0.203 – 0.254)

S16 1098

1

2

3

4

5

6

7

8

0.150 – 0.157**

(3.810 – 3.988)

16

15

14

13

0.386 – 0.394*

(9.804 – 10.008)

0.228 – 0.244

(5.791 – 6.197)

12

11

10

9

DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH

SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE

DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD

FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE

*

**

0.053 – 0.069

(1.346 – 1.752)

0.014 – 0.019

(0.355 – 0.483)

TYP

0.004 – 0.010

(0.101 – 0.254)

0.050

(1.270)

BSC