參數(shù)資料
型號: LT1614IMS8
英文描述: Analog IC
中文描述: 模擬IC
文件頁數(shù): 1/16頁
文件大?。?/td> 257K
代理商: LT1614IMS8
1
LT1614
Inverting 600kHz
Switching Regulator
The LT
1614 is a fixed frequency, inverting mode switch-
ing reglator that operates from an input voltage as low as
1V. Utilizing a low noise topology, the LT1614 can gener-
ate a negative output down to –24V from a 1V to 5V input.
Fixed frequency switching ensures a clean output free
from low frequency noise. The device contains a low-
battery detector with a 200mV reference and shuts down
to less than 10
μ
A. No load quiescent current of the LT1614
is 1mA and the internal NPN power switch handles a
500mA current with a voltage drop of just 295mV.
High frequency switching enables the use of small induc-
tors and capacitors. Ceramic capacitors can be used in
many applications, eliminating the need for bulky tanta-
lum types.
The LT1614 is available in 8-lead MSOP or SO packages.
, LTC and LT are registered trademarks of Linear Technology Corporation.
I
Better Regulation Than a Charge Pump
I
0.1
Effective Output Impedance
I
–5V at 200mA from a 5V Input
I
600kHz Fixed Frequency Operation
I
Operates with V
IN
as Low as 1V
I
1mA Quiescent Current
I
Low Shutdown Current: 10
μ
A
I
Low-Battery Detector
I
Low V
CESAT
Switch: 295mV at 500mA
I
MR Head Bias
I
LCD Bias
I
GaAs FET Bias
I
Positive-to-Negative Conversion
5V to –5V Converter Efficiency
Figure 1. 5V to –5V/200mA Converter
V
IN
SHDN
SW
LT1614
L1
22
μ
H
V
IN
5V
D1
NFB
69.8k
24.9k
100k
1nF
V
–5V
200mA
C2
33
μ
F
C1, C2: AVX TAJB336M010
C3: TAIYO YUDEN EMK316BJ105MF
D1: MBR0520
L1, L2: MURATA LQH3C220
1614 TA01
C1
33
μ
F
V
C
GND
L2
22
μ
H
C3
1
μ
F
+
+
LOAD CURRENT (mA)
3
10
30
E
60
70
80
90
100
300
1614 TA02
50
40
APPLICATIU
FEATURES
TYPICAL APPLICATIO
U
DESCRIPTIO
U
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