7

LTC1522

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.

General Layout Considerations

Due to the high switching frequency and high transient

currents produced by the LTC1522, careful board layout

is a must. A clean board layout using a ground plane and

1522 F04

LTC1522

18

27

36

45

SHDN

GND

+

S8 Package

8-Lead Plastic Small Outline (Narrow 0.150)

(LTC DWG # 05-08-1610)

short connections to all capacitors will improve perfor-

mance and ensure proper regulation under all conditions

(refer to Figure 4).

Figure 4. Suggested Component Placement for LTC1522

MS8 Package

8-Lead Plastic MSOP

(LTC DWG # 05-08-1660)

Dimensions in inches (millimeters) unless otherwise noted.

MSOP (MS8) 1197

* DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH,

PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE

** DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.

INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE

0.021

± 0.006

(0.53

± 0.015)

0

° – 6° TYP

SEATING

PLANE

0.007

(0.18)

0.040

± 0.006

(1.02

± 0.15)

0.012

(0.30)

REF

0.006

± 0.004

(0.15

± 0.102)

0.034

± 0.004

(0.86

± 0.102)

0.0256

(0.65)

TYP

12

3

4

0.192

± 0.004

(4.88

± 0.10)

8

7 6

5

0.118

± 0.004*

(3.00

± 0.102)

0.118

± 0.004**

(3.00

± 0.102)

1

2

3

4

0.150 – 0.157**

(3.810 – 3.988)

8

7

6

5

0.189 – 0.197*

(4.801 – 5.004)

0.228 – 0.244

(5.791 – 6.197)

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)

SO8 0996

0.053 – 0.069

(1.346 – 1.752)

0.014 – 0.019

(0.355 – 0.483)

0.004 – 0.010

(0.101 – 0.254)

0.050

(1.270)

TYP

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

*

**