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参数资料
| 型号： | LT1317IS8#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST ADJ 0.5A 8SOIC |
| 标准包装： | 2,500 |
| 类型： | 升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.24 V ~ 30 V |
| 输入电压： | 1.5 V ~ 12 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 600kHz |
| 电流 - 输出： | 500mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 8-SOIC |
LT1317/LT1317B
Micropower, 600kHz PWM
DC/DC Converters
FEATURES
DESCRIPTIO N
s
s
s
s
s
s
s
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100 μ A Quiescent Current
Operates with V IN as Low as 1.5V
600kHz Fixed Frequency Operation
Starts into Full Load
Low-Battery Detector Active in Shutdown
Automatic Burst Mode Operation at
Light Load (LT1317)
Continuous Switching at Light Loads (LT1317B)
Low V CESAT Switch: 300mV at 500mA
Pin for Pin Compatible with the LT1307/LT1307B
The LT ? 1317/LT1317B are micropower, fixed frequency
step-up DC/DC converters that operate over a wide input
voltage range of 1.5V to 12V. The LT1317 features auto-
matic shifting to power saving Burst Mode TM operation at
light loads. High efficiency is maintained over a broad
300 μ A to 200mA load range. Peak switch current during
Burst Mode operation is kept below 250mA for most
operating conditions which results in low output ripple
voltage, even at high input voltages. The LT1317B does
not shift into Burst Mode operation at light loads, eliminat-
ing low frequency output ripple at the expense of light load
Cellular Telephones
Cordless Telephones
Pagers
GPS Receivers
Battery Backup
Portable Electronic Equipment
Glucose Meters
APPLICATIO N S
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efficiency.
The LT1317/LT1317B contain an internal low-battery de-
tector with a 200mV reference that stays alive when the
device goes into shutdown.
No-load quiescent current of the LT1317 is 100 μ A and
shuts down to 30 μ A. The internal NPN power switch
handles a 500mA current with a voltage drop of just
300mV.
s
Diagnostic Medical Instrumentation
The LT1317/LT1317B are available in MS8 and SO-8
packages.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode is a trademark of Linear Technology Corporation.
TYPICAL APPLICATIO N
L1
10 μ H
D1
90
2-Cell to 3.3V Converter Efficiency
+
C1
47 μ F
V IN
LBI
LT1317
SW
FB
R1
3.3V
200mA
80
2.2V IN
3V IN
1.65V IN
2
CELLS
SHUTDOWN
SHDN
V C
R C
33k
C C
3.3nF
LBO
GND
1M
1%
R2*
604k
1%
+
C2
47 μ F
70
60
50
D1: MBR0520
L1: SUMIDA CD43-100
1317 F01
40
* FOR 5V OUTPUT, R2 = 332k, 1%
Figure 1. 2-Cell to 3.3V Boost Converter
0.3
1
10 100
LOAD CURRENT (mA)
1000
1317 TA01
1
相关PDF资料 |
PDF描述 |
|---|---|
| LT1317IS8#TR | IC REG BOOST ADJ 0.5A 8SOIC |
| LT1316IS8#TRPBF | IC REG BST FLYBK ADJ 0.5A 8SOIC |
| LT1316IS8#TR | IC REG BST FLYBK ADJ 0.5A 8SOIC |
| LT1576CS8-5#PBF | IC REG BUCK 5V 1.5A 8SOIC |
| LT1576CS8-5 | IC REG BUCK 5V 1.5A 8SOIC |
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