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参数资料
| 型号： | LTC3450EUD#TR |
| 厂商： | Linear Technology |
| 文件页数： | 1/12页 |
| 文件大小： | 0K |
| 描述： | IC CONV PS TRIPLE TFT/LCD 16QFN |
| 标准包装： | 2,500 |
| 应用： | 转换器，TFT，LCD |
| 输入电压： | 1.5 V ~ 4.6 V |
| 输出数： | 3 |
| 输出电压： | 5.1V，-5V，±10V，±15V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-WFQFN 裸露焊盘 |
| 供应商设备封装： | 16-QFN-EP（3x3） |
| 包装： | 带卷 (TR) |
LTC3450
Triple Output Power Supply
for Small TFT-LCD Displays
FEATURES
DESCRIPTIO
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Generates Three Voltages:
5.1V at 10mA
– 5V, –10V, or –15V at 500 μ A
10V or 15V at 500 μ A
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 μ A (Typ) in Scan Mode
Available in a 3mm × 3mm 16-Pin QFN Package
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
(0.75mm), 3mm × 3mm 16-pin QFN package, minimizing
the solution profile and footprint.
APPLICATIO S
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
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Cellular Handsets with Color Display
Handheld Instruments
PDA
TYPICAL APPLICATIO
5.1V, –10V, 15V Triple Output TFT-LCD Supply
V OUT
C1 +
– 10
V IN
1.5V TO
4.6V
2.2 μ F
BLANK SCAN
47 μ H
6
4
8
SW
V IN
MODE
7
C1
V2X
11
12
2.2 μ F
0.1 μ F
AV DD
5.1V/10mA
100
95
90
AV DD Efficiency vs V IN
5mA LOAD
100 μ H
LTC3450
C2 +
14
0.47 μ F
47 μ H
OFF ON
5
SHDN
C2 –
13
0.1 μ F
85
9
V3X
GND V INV
V NEG C3 – C3 +
3
2
1
15
16
VGH (3 × AV DD )
15V/500 μ A
0.1 μ F
80
75
0.1 μ F
70
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
0.1 μ F
VGL
–10V/500 μ A
V IN (V)
3450 TA01b
3450 TA01
3450fa
1
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