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參數(shù)資料
| 型號： | LT1500 |
| 廠商： | Linear Technology Corporation |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| 中文描述： | 抗輻射高效，5安培開關(guān)穩(wěn)壓器 |
| 文件頁數(shù)： | 1/16頁 |
| 文件大小： | 190K |
| 代理商： | LT1500 |
1
LT1500/LT1501
Adaptive-Frequency
C urrent Mode Switching Regulators
FEATURES
DESCRIPTIO
N
U
The LT
1500 is an adaptive-frequency current mode step-
up switching regulator with an internal power switch that
is rated up to 700mA. In contrast to pulse skipping
switching regulators, the LT1500 uses a current mode
topology that provides lower noise operation and im-
proved efficiency. Only at very light loads is Burst Mode
TM
activated to give high efficiency and micropower opera-
tion. High switching frequency (up to 500kHz) allows very
small inductors to be used, along with ceramic capacitors
if desired.
The LT1500 operates with input voltages from 1.8V to 15V
and has only 200
μ
A operating current dropping to 8
μ
A in
shutdown. A low-battery comparator is included which
stays alive in shutdown. A second output feedback pin
with negative polarity allows negative output voltages to
be regulated when the switcher is connected up as a Cuk
or a flyback converter.
Two package types are available. The LT1500 comes in a
14-pin SO package, with two options available for fixed
output (3.3V or 5V) or adjustable operation. A reduced
feature part, the LT1501, comes in the smaller 8-pin SO
package with internal frequency compensation. It is also
available in adjustable and fixed output voltage versions.
I
Low Noise Adaptive-Frequency Current Mode
Operation Avoids Low Frequency Noise at
Most Load Currents
I
Can Be Externally Synchronized (LT1500)
I
Micropower Quiescent Current: 200
μ
A
I
Shutdown Current: 8
μ
A Typ
I
Internal Loop Compensation
I
Low-Battery Comparator Active in Shutdown
I
Minimum Input Voltage: 1.8V Typ
I
Additional Negative Voltage Feedback Pin (LT1500)
I
Up to 500kHz Switching Frequency
I
Uses Low Profile, Low Cost Surface Mount Inductors
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode is a trademark of Linear Technology Corporation.
I
Portable Instrumentation
I
Battery Operated Systems
I
PDA’s
I
Standby Power
APPLICATIO
S
U
TYPICAL APPLICATIO
N
U
2-Cell to 5V Converter
SHDN
V
IN
LBO
LBI
SW
I
SENSE
GND
OUT
LT1501-5
+
1nF
301k
1%
301k
1%
LOW-BATTERY FLAG
(USE EXTERNAL PULL-UP)
33
μ
F*
6V
+
220
μ
F**
10V
TANT
2 EACH
NiCd OR
ALKALINE
CELLS
22
μ
H
5V, 200mA
LT1500/01 TA01
AVX, TPSC107M006R0150
AVX, TPSD107M010 R0100
SUMIDA CD73-220, CD54-220
OR CD43-220. SELECT ACCORDING
TO MAXIMUM LOAD CURRENT
*
**
D1
MBR0520L
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LT1500CS | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| LT1500IS | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| LT1501 | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| LT1501CS8 | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| LT1501CS8-3.3 | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT1500CS | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Adaptive-Frequency Current Mode Switching Regulators |
| LT1500CS-3 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Adaptive-Frequency Current Mode Switching Regulators |
| LT1500CS-3/5 | 制造商:Linear Technology 功能描述:3/5V 2 Cell L/Noise Step-Up Conv |
| LT1500CS-5 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Adaptive-Frequency Current Mode Switching Regulators |
| LT1500IS | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Adaptive-Frequency Current Mode Switching Regulators |
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