LTC1773EMS データシートの表示（PDF） - Linear Technology

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LTC1773EMS

Synchronous Step-Down DC/DC Controller

Linear Technology 

LTC1773

TYPICAL APPLICATIONS

750kHz CLK

47pF

30k

220pF

LTC1773

1

10

ITH

SW

2 RUN/SS SENSE– 9

100pF

0.1µF 3

SYNC/FCB

4

VFB

5

GND

8

VIN

7

TG

6

BG

169k

1%

80.6k

1%

100pF

0.1µF

RSENSE

0.05Ω

Si6803DQ

2.7V ≤ VIN ≤ 4.2V

VOUT

L1

3µH

2.5V

1A

+ CIN

47µF

6.3V

4.7µF

6.3V

+ COUT

47µF

6.3V

CIN, COUT: SANYO POSCAP 6TPA47M

L1: SUMIDA CDRH5D28 3R0

RSENSE: IRC LR1206-01-R050-J

Figure 11. 750kHz Single Lithium-Ion to 2.5V/1A Regulator

1773 TA06

1µF

47pF

220pF

30k

0.1µF

100pF

80.6k

1%

LTC1773

1

10

ITH

SW

2 RUN/SS SENSE– 9

3

SYNC/FCB

4

VFB

5

GND

8

VIN

7

TG

6

BG

100k

0.1µF

1%

100pF

8

LT1762-2.5 1

IN

OUT

2

SENSE

5

SHDN

3

BYP

GND

VOUT3

2.5V

150mA

0.01µF

10µF

VOUT1

1.8V

6A

VOUT2

3.3V

1A

3.3V ≤ VIN ≤ 6V

RSENSE

0.01Ω

MBRM120T3

+ CSEC

47µF

6.3V

Si7540DP

T1

2.44µH

1:1

D2*

MBRS340T3

249k

1%

80.6k

1%

+

COUT

680µF

4V

×2

+ CIN

150µF

6.3V

CIN: PANASONIC SPECIAL POLYMER

COUT: KEMET T510687K004AS

T1: BH ELECTRONICS 510-1007

RSENSE: IRC LR2512-01-R010-J

CSEC: TAIYO YUDEN LMK432F476ZM

*NOTE: D2 NOT NECESSARY.

IF REMOVED, EFFICIENCY DROPS BY 1%

Figure 12. Triple Output 1.8V/6A, 2.5V/150mA,and 3.3V/1A Application

1773 TA07

1773fb

17

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