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參數資料
| 型號： | LT1308A |
| 廠商： | Linear Technology Corporation |
| 英文描述： | CAPACITOR 3900UF 35V ELECT TSUP |
| 中文描述： | 大電流，微功耗單細胞，600kHz的直流/直流轉換器 |
| 文件頁數： | 1/12頁 |
| 文件大?。?/td> | 185K |
| 代理商： | LT1308A |
1
LT1308A/LT1308B
FEATURES
DESCRIPTIO
N
U
APPLICATIO
S
U
TYPICAL APPLICATIO
N
U
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode is a trademark of Linear Technology Corporation.
Final Electrical Specifications
High C urrent, Micropower
Single C ell, 600kHz
DC /DC C onverters
August 1999
I
5V at 1A from a Single Li-Ion Cell
I
5V at 800mA in SEPIC Mode from Four NiCd Cells
I
Fixed Frequency Operation: 600kHz
I
Boost Converter Outputs up to 34V
I
Starts into Heavy Loads
I
Automatic Burst Mode
TM
Operation at
Light Load (LT1308A)
I
Continuous Switching at Light Loads (LT1308B)
I
Low V
CESAT
Switch: 300mV at 2A
I
Pin-for-Pin Upgrade Compatible with LT1308
I
Lower Quiescent Current in Shutdown: 1
μ
A (Max)
I
Improved Accuracy Low-Battery Detector
Reference: 200mV
±
2%
I
GSM/CDMA Phones
I
Digital Cameras
I
LCD Bias Supplies
I
Answer-Back Pagers
I
GPS Receivers
I
Battery Backup Supplies
I
Handheld Computers
The LT
1308A/LT1308B are micropower, fixed 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 saving
Burst Mode operation at light loads and consumes just
140
μ
A at no load. The LT1308B features continuous
switching at light loads and operates at a quiescent current
of 2.5mA. Both devices consume less than 1
μ
A in
shutdown.
Low-battery detector accuracy is significantly tighter than
the LT1308. The 200mV reference is specified 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 V
IN
as on the LT1308. An
internal V
C
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
14-lead TSSOP packages.
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
Figure 1. LT1308B Single Li-Ion Cell to 5V/1A DC/DC Converter
V
IN
LBI
SW
FB
LT1308B
L1
4.7
μ
H
D1
LBO
47k
R2
100k
R1*
309k
5V
1A
100pF
1308A/B F01
C1
47
μ
F
C2
220
μ
F
Li-Ion
CELL
V
C
GND
SHDN
SHUTDOWN
C1: AVX TAJC476M010
C2: AVX TPSD227M006
D1: IR 10BQ015
+
+
L1: MURATA LQH6N4R7
*R1: 169k FOR V
OUT
= 3.3V
887k FOR V
OUT
= 12V
Converter Efficiency
LOAD CURRENT (mA)
1
E
95
90
85
80
75
70
65
60
55
50
10
100
1000
1308A/B F01a
V
IN
= 4.2V
V
IN
= 1.5V
V
IN
= 2.5V
V
IN
= 3.6V
相關PDF資料 |
PDF描述 |
|---|---|
| LT1308ACF | High Current, Micropower Single Cell, 600kHz DC/DC Converters |
| LT1308ACS8 | High Current, Micropower Single Cell, 600kHz DC/DC Converters |
| LT1308B | High Current, Micropower Single Cell, 600kHz DC/DC Converters |
| LT1308BCF | High Current, Micropower Single Cell, 600kHz DC/DC Converters |
| LT1308BCS8 | High Current, Micropower Single Cell, 600kHz DC/DC Converters |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LT1308A_1 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:High Current, Micropower Single Cell, 600kHz DC/DC Converters |
| LT1308ACF | 功能描述:IC REG BOOST 5V 1A 14TSSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩壓器 - DC DC 開關穩壓器 系列:- 標準包裝:20 系列:SIMPLE SWITCHER® 類型:降壓（降壓） 輸出類型:固定 輸出數:1 輸出電壓:12V 輸入電壓:4 V ~ 60 V PWM 型:電壓模式 頻率 - 開關: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 供應商設備封裝: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 - 穩壓器 - DC DC 開關穩壓器 系列:- 標準包裝:20 系列:SIMPLE SWITCHER® 類型:降壓（降壓） 輸出類型:固定 輸出數:1 輸出電壓:12V 輸入電壓:4 V ~ 60 V PWM 型:電壓模式 頻率 - 開關: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 供應商設備封裝:16-DIP 其它名稱:*LM2575HVN-12LM2575HVN-12 |
| LT1308ACF#TR | 功能描述:IC REG BOOST 5V 1A 14TSSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩壓器 - DC DC 開關穩壓器 系列:- 標準包裝:20 系列:SIMPLE SWITCHER® 類型:降壓（降壓） 輸出類型:固定 輸出數:1 輸出電壓:12V 輸入電壓:4 V ~ 60 V PWM 型:電壓模式 頻率 - 開關: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 供應商設備封裝:16-DIP 其它名稱:*LM2575HVN-12LM2575HVN-12 |
| LT1308ACF#TRPBF | 功能描述:IC REG BOOST 5V 1A 14TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - DC DC 開關穩壓器 系列:- 標準包裝:20 系列:SIMPLE SWITCHER® 類型:降壓（降壓） 輸出類型:固定 輸出數:1 輸出電壓:12V 輸入電壓:4 V ~ 60 V PWM 型:電壓模式 頻率 - 開關: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 供應商設備封裝:16-DIP 其它名稱:*LM2575HVN-12LM2575HVN-12 |
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