參數(shù)資料
型號: LTC3450
廠商: Linear Technology Corporation
英文描述: Triple Output Power Supply for Small TFT-LCD Displays
中文描述: 三輸出電源小型TFT - LCD顯示器
文件頁數(shù): 1/12頁
文件大?。?/td> 401K
代理商: LTC3450
LTC3450
1
3450f
FEATURES
DESCRIPTIOU
APPLICATIU
TYPICAL APPLICATIO
5.1V, –10V, 15V Triple Output TFT-LCD Supply
U
The LTC
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 –5V, –10V or –15V.
Output sequencing is controlled internally to insure proper
initialization of the LCD panel.
A master shutdown input reduces quiescent current to
<2
μ
A 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
×
3mm 16-pin QFN package, mini-
mizing the solution profile and footprint.
I
Cellular Handsets with Color Display
I
Handheld Instruments
I
PDA
, LTC and LT are registered trademarks of Linear Technology Corporation.
I
Generates Three Voltages:
5.1V at 10mA
–5V, –10, or –15V at 500
μ
A
10V or 15V at 500
μ
A
I
Better than 90% Efficiency
I
Low Output Ripple: Less than 5mV
P-P
I
Complete 1mm Component Profile Solution
I
Controlled Power-Up Sequence: AV
DD
/V
GL
/V
GH
I
All Outputs Disconnected and Actively Discharged in
Shutdown
I
Low Noise Fixed Frequency Operation
I
Frequency Reduction Input for High Efficiency in
Blank Mode
I
Ultralow Quiescent Current: 75
μ
A (Typ) in Scan Mode
I
Available in a 3mm
×
3mm 16-Pin QFN Package
Triple Output Power Supply
for Small TFT-LCD Displays
0.1
μ
F
2.2
μ
F
V
IN
1.5V TO
4.6V
AV
5.1V/10mA
VGH (3
×
AV
DD
)
15V/500
μ
A
VGL
–10V/500
μ
A
3450 TA01
0.1
μ
F
C1
+
C1
0.1
μ
F
C2
+
C2
11
7
8
10
14
13
V2X
V3X
V
INV
V
IN
SHDN
MODE
SW
V
OUT
V
NEG
LTC3450
GND
12
15
16
1
2
3
6
5
OFF ON
BLANK SCAN
47
μ
H
4
9
2.2
μ
F
0.47
μ
F
0.1
μ
F
0.1
μ
F
C3
C3
+
AV
DD
Efficiency vs V
IN
V
IN
(V)
1.5
E
100
95
90
85
80
75
70
3.0
4.0
3450 TA01b
2.0
2.5
3.5
4.5
5.0
100
μ
H
47
μ
H
5mA LOAD
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