LT1302-5 查看數據表（PDF） - Linear Technology

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LT1302-5

Micropower High Output Current Step-Up Adjustable and Fixed 5V DC/DC Converters

Linear Technology 

LT1302/LT1302-5

PI FU CTIO S

SW (Pin 7): Switch Pin. Connect inductor and diode here.

Keep layout short and direct.

PGND (Pin 8): Power Ground. Pins 8 and 1 should be

connected under the package. In the SO package, pins 1

and 8 are thermally connected to the die. One square inch

of PCB copper provides an adequate heat sink for the

device.

BLOCK DIAGRA SM

VIN

+

C1

C5

100pF

1.24V

REFERENCE

R1

FB

4

R2

SHDN

3

SHUTDOWN

L1

6

VIN

C2

0.1µF

36mV

+

–

VOS

15mV

CMP1

ENABLE

OFF

220kHz

OSCILLATOR

HYSTERETIC

COMPARATOR 2µA

VIN

Q5

–

A1

+

ERROR

AMPLIFIER

A2

R5

730Ω

A3

DRIVER

VIN

Q1 Q2

BIAS

300Ω 3.6k

D1

+

VOUT

C3

7

SW

R4

1.75Ω

Q3

Q4

160X

GND

1

2 VC

R3

22k

C4

0.01µF

5 IT

PGND

8

1302 F02

Figure 2. LT1302 Block Diagram

5

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