PDF預(yù)覽

• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14
• 15
• 16
• 17
• 18
• 19
• 20
• 21
• 22
• 23
• 24

LT1777

Low Noise Step-Down

Switching Regulator

FEATURES

s

s

s

s

s

s

s

s

s

DESCRIPTIO

Programmable dI/dt Limit

Internally Limited dV/dt

High Input Voltage: 48V Max

700mA Peak Switch Rating

True Current Mode Control

100kHz Fixed Operating Frequency

Synchronizable to 250kHz

Low Supply Current in Shutdown: 30碌A(chǔ)

Low Thermal Resistance 16-Pin SO Package

The LT

廬

1777 is a Buck (step-down) regulator designed for

noise sensitive applications. It contains a dI/dt limiting

circuit programmed via a small external inductor in the

switching path. Internal circuitry also generates controlled

dV/dt ramp rates.

The monolithic die includes all oscillator, control and

protection circuitry. The part can accept operating input

voltages as high as 48V, and contains an output switch

rated at 700mA peak current. Current mode control offers

excellent dynamic input supply rejection and short-circuit

protection. The internal control circuitry is normally pow-

ered via the V

CC

pin, thereby minimizing power drawn

directly from the V

IN

supply (see Applications Informa-

tion). The fused-lead SO16 package and 100kHz switch-

ing frequency allow for minimal PC board area

requirements.

, LTC and LT are registered trademarks of Linear Technology Corporation.

APPLICATIO S

s

s

s

Automotive Cellular and GPS Receivers

Telecom Power Supplies

Industrial Instrument Power Supplies

TYPICAL APPLICATIO

Low Noise 5V Step-Down Supply

V

IN

24V

+

10

39碌F

63V

100pF

12

14

100pF 12k

SGND

2200pF

7

12.1k

1%

1777 TA01

3

V

IN

SHDN

V

CC

V

SW

V

D

FB

LT1777

SYNC

V

C

4

1碌H*

6

5

13

MBRS1100

220碌H

V

OUT

5V

400mA

100碌F

10V

36.5k

1%

V

SW

VOLTAGE

10V/DIV

+

V

SW

CURRENT

200mA/DIV

1777 TA02

*PROGRAMS dI/dT

U

V

SW

Switching Waveforms

500ns/DIV

U

U

1

next

LT1777IS相關(guān)型號PDF文件下載

• 型號
  版本
  描述
  廠商
  下載
• LT171
  英文版
  Seoul Semiconductor [Infrared LAMP LED]
  SEOUL
  LT171
• LT1700
  英文版
  No Rsense Synchronous Step-Up DC/DC Controller
  Linear
  LT1700
• LT170A
  英文版
  Linear Hall-Effect Sensor
  ETC
  LT170A
• LT1711
  英文版
  Single/Dual 4.5ns, 3V/5V, Rail-to-Rail Comparators
  LINER
  LT1711
• LT1711
  英文版
  UNDERSTANDING THE SUBJECT IS CUSTOMER SERVICE
  ETC
  LT1711
• LT1711
  英文版
  4.5ns, 3V/5V/?V, Rail-to-Rail Comparator
  Linear
  LT1711
• LT1712
  英文版
  Single/Dual 4.5ns, 3V/5V, Rail-to-Rail Comparators
  LINER
  LT1712
• LT1712
  英文版
  UNDERSTANDING THE SUBJECT IS CUSTOMER SERVICE
  ETC
  LT1712
• LT1712
  英文版
  Dual, 4.5ns, 3V/5V/?V, Rail-to-Rail Comparator
  Linear
  LT1712
• LT1713
  英文版
  4ns, 150MHz Dual Comparator with Independent Input/Output Su...
  LINER
  LT1713
• LT1713
  英文版
  UNDERSTANDING THE SUBJECT IS CUSTOMER SERVICE
  ETC
  LT1713
• LT1713
  英文版
  7ns, Low Power, 3V/5V/?V Rail-to-Rail Comparator
  Linear
  LT1713
• LT1714
  英文版
  UNDERSTANDING THE SUBJECT IS CUSTOMER SERVICE
  ETC
  LT1714
• LT1714
  英文版
  4ns, 150MHz Dual Comparator with Independent Input/Output Su...
  LINER
  LT1714
• LT1714
  英文版
  7ns, Low Power, 3V/5V Dual Rail-to-Rail Comparator
  Linear
  LT1714
• LT1714
  英文版
  7ns, Low Power, 3V/5V Dual Rail-to-Rail Comparator
  Linear
  LT1714
• LT1715
  英文版
  4ns, 150MHz Dual Comparator with Independent Input/Output Su...
  LINER
  LT1715
• LT1715
  英文版
  4ns, 150MHz Dual Comparator with Independent Input/Output Su...
  Linear
  LT1715
• LT1716
  英文版
  SOT-23, 44V, Over-The-Top, Micropower, Precision Rail-to-Rai...
  LINER
  LT1716
• LT1716
  英文版
  SOT-23, 44V, Over-the-Top, Micropower, Precision, Rail-to-Ra...
  Linear
  LT1716

您可能感興趣的PDF文件資料

• LT1746
• LT1764A
• LT1719IS6#TRMPBF
• LT1763 Series
• LT1763CDE
• LT1764-1.5
• LT1761
• LT1761_1
• LT1762EMS8
• LT1763-5
• LT1761ES5-5
• LT1762EMS8-3.3#PBF

熱門IC型號推薦

• LM358ADR
• LP3984IMF-1.8
• LTC1754ES6-5#TR
• LP3985IBLX-2.7
• LTC4300A-1IMS8
• LM2990SX-5.0
• LM1086CT-ADJ
• LMSZ5232BT1G
• LM833MX
• LTC1624CS8
• LM2576SX-3.3
• LM258DT