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LT1614IMS8 Datasheet

  • LT1614IMS8

  • Analog IC

  • 16頁

  • ETC

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LT1614
Inverting 600kHz
Switching Regulator
FEATURES
s
s
s
s
s
s
s
s
s
DESCRIPTIO
Better Regulation Than a Charge Pump
0.1
鈩?/div>
Effective Output Impedance
鈥?5V at 200mA from a 5V Input
600kHz Fixed Frequency Operation
Operates with V
IN
as Low as 1V
1mA Quiescent Current
Low Shutdown Current: 10碌A(chǔ)
Low-Battery Detector
Low V
CESAT
Switch: 295mV at 500mA
The LT
廬
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 鈥?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碌A(chǔ). 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.
APPLICATIO S
s
s
s
s
MR Head Bias
LCD Bias
GaAs FET Bias
Positive-to-Negative Conversion
TYPICAL APPLICATIO
L1
22碌H
C3
1碌F
V
IN
5V
L2
22碌H
5V to 鈥?5V Converter Efficiency
90
+
V
IN
C1
33碌F
100k
1nF
SW
69.8k
D1
24.9k
EFFICIENCY (%)
C1, C2: AVX TAJB336M010
C3: TAIYO YUDEN EMK316BJ105MF
D1: MBR0520
L1, L2: MURATA LQH3C220
Figure 1. 5V to 鈥?5V/200mA Converter
+
SHDN
LT1614
V
C
NFB
GND
V
OUT
鈥?5V
200mA
C2
33碌F
80
70
60
1614 TA01
50
40
3
100
10
30
LOAD CURRENT (mA)
300
1614 TA02
U
U
U
1

LT1614IMS8 產(chǎn)品屬性

  • LT1614

  • 50

  • 集成電路 (IC)

  • PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器

  • -

  • 反相

  • 可調(diào)式

  • 1

  • 可調(diào)至 -24V

  • 0.8 V ~ 5 V

  • 電流模式

  • 600kHz

  • 500mA

  • 無

  • -40°C ~ 85°C

  • 表面貼裝

  • 8-TSSOP，8-MSOP（0.118"，3.00mm 寬）

  • 管件

  • 8-MSOP

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