參數(shù)資料
型號(hào)： LT1308BCF#TRPBF
廠商： LINEAR TECHNOLOGY CORP
元件分類(lèi)： 穩(wěn)壓器
英文描述： 4.5 A SWITCHING REGULATOR, 750 kHz SWITCHING FREQ-MAX, PDSO14
封裝： 4.40 MM, LEAD FREE, PLASTIC, TSSOP-14
文件頁(yè)數(shù)： 1/20頁(yè)
文件大?。?/td> 367K
代理商： LT1308BCF#TRPBF
LT1308A/LT1308B
1
1308abfb
TYPICAL APPLICATION
DESCRIPTION
High Current, Micropower
Single Cell, 600kHz
DC/DC Converters
The LT1308A/LT1308B are micropower, xed frequency
step-up DC/DC converters that operate over a 1V to 10V
input voltage range. They are improved versions of the
LT1308 and are recommended for use in new designs.
The LT1308A features automatic shifting to power sav-
ing Burst Mode operation at light loads and consumes
just 140μA at no load. The LT1308B features continuous
switching at light loads and operates at a quiescent cur-
rent of 2.5mA. Both devices consume less than 1μA in
shutdown.
Low-battery detector accuracy is signicantly tighter than
the LT1308. The 200mV reference is specied at ± 2%
at room and ±3% over temperature. The shutdown pin
enables the device when it is tied to a 1V or higher source
and does not need to be tied to VIN as on the LT1308. An
internal VC clamp results in improved transient response
and the switch voltage rating has been increased to 36V,
enabling higher output voltage applications.
The LT1308A/LT1308B are available in the 8-lead SO and
the 14-lead TSSOP packages.
Converter Efciency
FEATURES
APPLICATIONS
n 5V at 1A from a Single Li-Ion Cell
n 5V at 800mA in SEPIC Mode from Four NiCd Cells
n Fixed Frequency Operation: 600kHz
n Boost Converter Outputs up to 34V
n Starts into Heavy Loads
n Automatic Burst Mode Operation at
Light Load (LT1308A)
n Continuous Switching at Light Loads (LT1308B)
n Low VCESAT Switch: 300mV at 2A
n Pin-for-Pin Upgrade Compatible with LT1308
n Lower Quiescent Current in Shutdown: 1μA (Max)
n Improved Accuracy Low-Battery Detector
Reference: 200mV ± 2%
n Available in 8-Lead SO and 14-Lead TSSOP Packages
n GSM/CDMA Phones
n Digital Cameras
n LCD Bias Supplies
n Answer-Back Pagers
n GPS Receivers
n Battery Backup Supplies
n Handheld Computers
Figure 1. LT1308B Single Li-Ion Cell to 5V/1A DC/DC Converter
VIN
SW
FB
LT1308B
L1
4.7μH
D1
LBO
LBI
47k
R2
100k
R1*
309k
5V
1A
100pF
1308A/B F01a
C1
47μF
C2
220μF
Li-Ion
CELL
VC
GND
SHDN
SHUTDOWN
C1: AVX TAJC476M010
C2: AVX TPSD227M006
D1: IR 10BQ015
+
L1: MURATA LQH6C4R7
*R1: 887k FOR VOUT = 12V
LOAD CURRENT (mA)
1
EFFICIENCY
(%)
95
90
85
80
75
70
65
60
55
50
10
100
1000
1308A/B F01b
VIN = 4.2V
VIN = 1.5V
VIN = 2.5V
VIN = 3.6V
L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks
of Linear Technology Corporation. All other trademarks are the property of their respective
owners.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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LT1308BCS8#PBF 功能描述:IC REG BOOST 5V 1A 8SOIC RoHS:是 類(lèi)別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開(kāi)關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:250 系列:- 類(lèi)型:降壓（降壓） 輸出類(lèi)型:固定 輸出數(shù):1 輸出電壓:1.2V 輸入電壓:2.05 V ~ 6 V PWM 型:電壓模式 頻率 - 開(kāi)關(guān):2MHz 電流 - 輸出:500mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:6-UFDFN 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:6-SON（1.45x1） 產(chǎn)品目錄頁(yè)面:1032 (CN2011-ZH PDF) 其它名稱(chēng):296-25628-2
LT1308BCS8#PBF 制造商:Linear Technology 功能描述:Switching Regulator IC 制造商:Linear Technology 功能描述:IC, DC/DC CONVERTER, 8-SOIC
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