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LTC3450EUD Datasheet

  • LTC3450EUD

  • Triple Output Power Supply for Small TFT-LCD Displays

  • 12頁

  • LINER

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LTC3450
Triple Output Power Supply
for Small TFT-LCD Displays
FEATURES
s
DESCRIPTIO
s
s
s
s
s
s
s
s
s
Generates Three Voltages:
5.1V at 10mA
鈥?5V, 鈥?0, or 鈥?5V at 500碌A(chǔ)
10V or 15V at 500碌A(chǔ)
Better than 90% Efficiency
Low Output Ripple: Less than 5mV
P-P
Complete 1mm Component Profile Solution
Controlled Power-Up Sequence: AV
DD
/V
GL
/V
GH
All Outputs Disconnected and Actively Discharged in
Shutdown
Low Noise Fixed Frequency Operation
Frequency Reduction Input for High Efficiency in
Blank Mode
Ultralow Quiescent Current: 75碌A(chǔ) (Typ) in Scan Mode
Available in a 3mm
脳
3mm 16-Pin QFN Package
The LTC
廬
3450 is a complete power converter solution for
small thin film transistor (TFT) liquid crystal display (LCD)
panels. The device operates from a single Lithium-Ion cell,
2- to 3-cell alkaline input or any voltage source between
1.5V and 4.6V.
The synchronous boost converter generates a low noise,
high efficiency 5.1V, 10mA supply. Internal charge pumps
are used to generate 10V, 15V, and 鈥?V, 鈥?0V or 鈥?5V.
Output sequencing is controlled internally to insure proper
initialization of the LCD panel.
A master shutdown input reduces quiescent current to
<2碌A(chǔ) and quickly discharges each output for rapid turn off
of the LCD panel. The LTC3450 is offered in a low profile
(0.8mm max), 3mm
脳
3mm 16-pin QFN package, mini-
mizing the solution profile and footprint.
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIO S
s
s
s
Cellular Handsets with Color Display
Handheld Instruments
PDA
TYPICAL APPLICATIO
V
IN
1.5V TO
4.6V
47碌H
2.2碌F
6
8
SW
V
IN
7
5.1V, 鈥?0V, 15V Triple Output TFT-LCD Supply
2.2碌F
0.1碌F
AV
DD
5.1V/10mA
100
5mA LOAD
95
100碌H
EFFICIENCY (%)
V
OUT
11
C1
+
10
C1
鈥?/div>
V2X
LTC3450
C2
+
C2
鈥?/div>
V3X
12
14
13
15
16
BLANK SCAN
4
MODE
90
47碌H
85
80
75
70
1.5
0.47碌F
0.1碌F
VGH (3
脳
AV
DD
)
15V/500碌A(chǔ)
0.1碌F
OFF ON
5
SHDN
9
GND
V
INV
V
NEG
C3
鈥?/div>
C3
+
3
2
1
0.1碌F
0.1碌F
VGL
鈥?0V/500碌A(chǔ)
3450 TA01
2.0
U
AV
DD
Efficiency vs V
IN
2.5
3.0 3.5
V
IN
(V)
4.0
4.5
5.0
3450 TA01b
U
U
3450f
1

LTC3450EUD 產(chǎn)品屬性

  • LTC3450

  • 121

  • 集成電路 (IC)

  • PMIC - 穩(wěn)壓器 - 專用型

  • -

  • 轉(zhuǎn)換器，TFT，LCD

  • 1.5 V ~ 4.6 V

  • 3

  • 5.1V，-5V，±10V，±15V

  • -40°C ~ 85°C

  • 表面貼裝

  • 16-WFQFN 裸露焊盤

  • 16-QFN-EP（3x3）

  • 管件

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