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參數(shù)資料
| 型號： | LT1307IS8#TR |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1.25 A SWITCHING REGULATOR, 750 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | 0.150 INCH, PLASTIC, SO-8 |
| 文件頁數(shù)： | 1/20頁 |
| 文件大小： | 369K |
| 代理商： | LT1307IS8#TR |
1
LT1307/LT1307B
1307fa
Single Cell Micropower
600kHz PWM DC/DC Converters
The LT
1307/LT1307B are micropower, fixed frequency
DC/DC converters that operate from an input voltage as
low as 1V. First in the industry to achieve true current
mode PWM performance from a single cell supply, the
LT1307 features automatic shifting to power saving Burst
Mode operation at light loads. High efficiency is main-
tained over a broad 100
A to 100mA load range. The
LT1307B does not shift into Burst Mode operation at light
loads, eliminating low frequency output ripple at the
expense of light load efficiency. The devices contain a low-
battery detector with a 200mV reference and shut down to
less than 5
A. No load quiescent current of the LT1307 is
50
A and the internal NPN power switch handles a 500mA
current with a voltage drop of just 295mV.
Unlike competitive devices, large electrolytic capacitors
are
not required with the LT1307/LT1307B in single cell
applications. The high frequency (600kHz) switching al-
lows the use of tiny surface mount multilayer ceramic
(MLC) capacitors along with small surface mount induc-
tors. The devices work with just 10
F of output capaci-
tance and require only 1
F of input bypassing.
The LT1307/LT1307B are available in 8-lead MSOP, PDIP
and SO packages.
s
Uses Small Ceramic Capacitors
s
50
A Quiescent Current (LT1307)
s
1mA Quiescent Current (LT1307B)
s
Operates with VIN as Low as 1V
s
600kHz Fixed Frequency Operation
s
Starts into Full Load
s
Low Shutdown Current: 3
A
s
Low-Battery Detector
s
3.3V at 75mA from a Single Cell
s
Automatic Burst Mode
Operation at
Light Load (LT1307)
s
Continuous Switching at Light Load (LT1307B)
s
Low VCESAT Switch: 295mV at 500mA
s
Pagers
s
Cordless Telephones
s
GPS Receivers
s
Battery Backup
s
Portable Electronic Equipment
s
Glucose Meters
s
Diagnostic Medical Instrumentation
Burst Mode is a registered trademark of Linear Technology Corporation.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Single Cell to 3.3V Converter Efficiency
LOAD CURRENT (mA)
0.1
70
EFFICIENCY
(%)
80
90
1
10
100
1307 TA01
60
50
VIN = 1.5V
VIN = 1V
VIN = 1.25V
VIN
SW
FB
LT1307
L1
10
H
D1
LBO
LBI
SHDN
SHUTDOWN
100k
R2
604k
1%
3.3V
75mA
R1
1.02M
1%
680pF
FOR 5V OUTPUT: R1 = 1M, R2 = 329k
C1: MURATA-ERIE GRM235Y5V105Z01
MARCON THCS50E1E105Z
TOKIN 1E105ZY5U-C103-F
C2: MURATA-ERIE GRM235Y5V106Z01
MARCON THCS50E1E105Z
TOKIN 1E106ZY5U-C304-F
1307 F01
C1
1
F
C2
10
F
1.5V
CELL
VC
GND
D1: MOTOROLA MBR0520L
L1: COILCRAFT D01608C-103
SUMIDA CD43-100
MURATA ERIE LQH3C100
Figure 1. Single Cell to 3.3V Boost Converter
FEATURES
DESCRIPTIO
U
APPLICATIO S
U
TYPICAL APPLICATIO
U
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| LT1308ACF | 功能描述:IC REG BOOST 5V 1A 14TSSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:20 系列:SIMPLE SWITCHER® 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:12V 輸入電壓:4 V ~ 60 V PWM 型:電壓模式 頻率 - 開關(guān):52kHz 電流 - 輸出:1A 同步整流器:無 工作溫度:-40°C ~ 125°C 安裝類型:通孔 封裝/外殼:16-DIP（0.300"，7.62mm） 包裝:管件 供應(yīng)商設(shè)備封裝:16-DIP 其它名稱:*LM2575HVN-12LM2575HVN-12 |
| LT1308ACF#PBF | 功能描述:IC REG BOOST 5V 1A 14TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:20 系列:SIMPLE SWITCHER® 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:12V 輸入電壓:4 V ~ 60 V PWM 型:電壓模式 頻率 - 開關(guān):52kHz 電流 - 輸出:1A 同步整流器:無 工作溫度:-40°C ~ 125°C 安裝類型:通孔 封裝/外殼:16-DIP（0.300"，7.62mm） 包裝:管件 供應(yīng)商設(shè)備封裝:16-DIP 其它名稱:*LM2575HVN-12LM2575HVN-12 |
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