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LT1614IS8 Datasheet

  • LT1614IS8

  • Inverting 600kHz Switching Regulator

  • 8頁(yè)

  • LINER

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Final Electrical Specifications
LT1614
Inverting 600kHz
Switching Regulator
July 1998
FEATURES
s
s
s
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s
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DESCRIPTION
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.
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
APPLICATIONS
s
s
s
s
MR Head Bias
LCD Bias
GaAs FET Bias
Positive-to-Negative Conversion
TYPICAL APPLICATION
5V to 鈥?5V Converter
L1
22碌H
C3
1碌F
L2
22碌H
5V to 鈥?5V Converter Efficiency
90
V
IN
5V
80
SHDN
LT1614
V
C
NFB
GND
EFFICIENCY (%)
+
V
IN
C1
33碌F
100k
1nF
C1, C2: AVX TAJB336M010
C3: AVX 1206CY106
D1: MBR0520
L1, L2: MURATA LQH3C220
SW
69.8k
D1
24.9k
V
OUT
鈥?5V
200mA
C2
33碌F
70
60
50
1614 TA01
40
3
100
10
30
LOAD CURRENT (mA)
300
1614 TA02
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.
U
+
U
U
1

LT1614IS8 產(chǎn)品屬性

  • LT1614

  • 100

  • 集成電路 (IC)

  • PMIC - 穩(wěn)壓器 - DC DC 開(kāi)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(wú)

  • -40°C ~ 85°C

  • 表面貼裝

  • 8-SOIC（0.154"，3.90mm 寬）

  • 管件

  • 8-SOIC

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