PDF預(yù)覽

• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14
• 15
• 16

LT1111

Micropower

DC/DC Converter

Adjustable and Fixed 5V, 12V

FEATURES

s

s

s

s

s

s

s

s

s

s

DESCRIPTIO

Operates at Supply Voltages from 2V to 30V

72kHz Oscillator

Works with Surface Mount Inductors

Only Three External Components Required

Step-Up or Step-Down Mode

Low-Battery Detector Comparator On-Chip

User Adjustable Current Limit

Internal 1A Power Switch

Fixed or Adjustable Output Voltage Versions

Space Saving 8-Pin MiniDIP or SO-8 Package

The LT1111 is a versatile micropower DC/DC converter.

The device requires only three external components to

deliver a fixed output of 5V or 12V. Supply voltage ranges

from 2V to 12V in step-up mode and to 30V in step-down

mode. The LT1111 functions equally well in step-up, step-

down, or inverting applications.

The LT1111 oscillator is set at 72kHz, optimizing the

device to work with off-the-shelf surface mount inductors.

The device can deliver 5V at 100mA from a 3V input in

step-up mode or 5V at 200mA from a 12V input in step-

down mode.

Switch current limit can be programmed with a single

resistor. An auxiliary open-collector gain block can be

configured as a low-battery detector, linear post regulator,

undervoltage lock-out circuit, or error amplifier.

For input sources of less than 2V use the LT1110.

APPLICATI

s

s

s

s

s

s

s

s

s

s

S

3V to 5V, 5V to 12V Converters

9V to 5V, 12V to 5V Converters

Remote Controls

Peripherals and Add-On Cards

Battery Backup Supplies

Uninterruptible Supplies

Laptop and Palmtop Computers

Cellular Telephones

Portable Instruments

Flash Memory VPP Generators

TYPICAL APPLICATI

Typical Load Regulation

6

5

OUTPUT VOLTAGE (V)

All Surface Mount 3V to 5V Step-Up Converter

SUMIDA

CD54-220M

MBRS120T3

22碌H

3V INPUT

5V

100mA

4

3

2

1

0

0

25

V

IN

= 2V 2.2 2.4

I

LIM

+

V

IN

SW1

10

碌

F*

+

LT1111CS8-5

SENSE

GND

SW2

33

碌

F

*OPTIONAL

LT1111 鈥?TA01

U

2.6

2.8 3V

50

75

100 125

150 175 200

LT1111 鈥?TA02

UO

UO

LOAD CURRENT (mA)

1

next

LT1111MJ8-5相關(guān)型號(hào)PDF文件下載

• 型號(hào)
  版本
  描述
  廠商
  下載
• LT111
  英文版
  Seoul Semiconductor [RED OVAL LAMP LED]
  SEOUL
  LT111
• LT118
  英文版
  Linear Technology [High Speed Operational Amplifier]
  LINER
  LT118
• LT1100
  英文版
  Linear Technology [Precision, Chopper-Stabilized Instrument...
  LINER
  LT1100
• LT1101
  英文版
  Precision, Micropower, Single Supply Instrumentation Amplifi...
  LINER
  LT1101
• LT1101
  英文版
  Precision, Micropower, Single Supply Instrumentation Amplifi...
  Linear
  LT1101
• LT1101
  英文版
  Precision, Micropower, Single Supply Instrumentation Amplifi...
  Linear
  LT1101
• LT1101
  英文版
  Precision, Micropower, Single Supply Instrumentation Amplifi...
  Linear
  LT1101
• LT1102
  英文版
  High Speed, Precision, JFET Input Instrumentation Amplifier(...
  LINER
  LT1102
• LT1102
  英文版
  High Speed, Precision JFET Input Instrumentation Amplifier (...
  Linear
  LT1102
• LT1102
  英文版
  High Speed, Precision, JFET Input Instrumentation Amplifier ...
  Linear
  LT1102
• LT1102
  英文版
  High Speed, Precision, JFET Input Instrumentation Amplifier&...
  Linear
  LT1102
• LT1103
  英文版
  Offline Switching Regulator
  LINER
  LT1103
• LT1103
  英文版
  Offline Switching Regulator
  Linear
  LT1103
• LT1103
  英文版
  Offline Switching Regulator
  Linear
  LT1103
• LT1103
  英文版
  Offline Switching Regulator
  Linear
  LT1103
• LT1105
  英文版
  Offline Switching Regulator
  LINER
  LT1105
• LT1105
  英文版
  Offline Switching Regulator
  Linear
  LT1105
• LT1105
  英文版
  Offline Switching Regulator
  Linear
  LT1105
• LT1105
  英文版
  Offline Switching Regulator
  Linear
  LT1105
• LT1106
  英文版
  Micropower Step-Up DC/DC Converter for PCMCIA Card Flash Mem...
  LINER
  LT1106

您可能感興趣的PDF文件資料

• LT1129
• LT1117
• LT1121
• LT1127CN
• LT1173
• LT1180A
• LT1108
• LT1121HV
• LT1124
• LT1124CN8#PBF
• LT1101
• LT1101SW#PBF

熱門(mén)IC型號(hào)推薦

• LP2996MX
• LP2980IM5-3.3
• LD1117DT50TR
• LM2941CS
• LTC4054LES5-4.2#TRPBF
• LT1016CS8
• LM2574N-5.0
• LM4040BIM3-4.1
• LM3914N-1
• LP2985-18DBVR
• LM360N
• LT1617ES5