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参数资料
| 型号： | LTC3450EUD#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 6/12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
PI FU CTIO S
C3 + (Pin 1): Charge Pump Inverter Flying Capacitor Posi-
tive Node. The charge pump inverter flying capacitor is
connected between C3 + and C3 – . The voltage on C3 + will
alternate between GND and V INV at an approximate 50%
duty cycle while the inverting charge pump is operating.
Use a 10nF or larger X5R type ceramic capacitor for best
results.
C3 – (Pin 2): Charge Pump Inverter Flying Capacitor Nega-
tive Node. The charge pump inverter flying capacitor is
connected between C3 + and C3 – . The voltage on C3 – will
alternate between GND and V NEG at an approximate 50%
duty cycle while the inverting charge pump is operating.
Use a 10nF or larger X5R type ceramic capacitor for best
results.
V NEG (Pin 3): Charge Pump Inverter Output. V NEG can be
either – 5V or –10V depending on where V INV is con-
nected. V NEG should be bypassed to GND with at 0.1 μ F or
larger X5R type ceramic capacitor. V NEG can also be
configured for –15V with two external low current Schottky
diodes (see Applications section).
MODE(Pin4): DriveMODEhightoforcetheLTC3450into
high power (scan) mode. Drive MODE low to force the
LTC3450 into low power (blank) mode. The output volt-
ages remain active with the MODE pin driven low but with
reduced output current capability. MODE must be pulled
up to V IN or higher on initial application of power in order
for proper initialization to occur.
SHDN (Pin 5): Master Shutdown Input for the LTC3450.
Driving SHDN low disables all IC functions and reduces
quiescent current from the battery to less than 2 μ A. Each
generated output voltage is actively discharged to GND in
shutdown through internal pull down devices. An optional
RC network on SHDN provides a slower ramp up of the
boost converter inductor current during startup (soft-start).
V IN (Pin 6): Input Supply to the LTC3450. Connect V IN to
a voltage source between 1.5V and 4.6V. Bypass V IN to
GND with a 2.2 μ F X5R ceramic capacitor.
V OUT (Pin 7): Main 5.1V Output of the Boost Regulator and
SW (Pin 8): Switch Pin. Connect the inductor between SW
and V IN . Keep PCB trace lengths as short and wide as
possible to reduce EMI and voltage overshoot. If the
inductor current falls to zero, the internal P-channel
MOSFET synchronous rectifier is turned off to prevent
reverse charging of the inductor and an internal switch
connects SW to V IN to reduce EMI.
GND (Pin 9): Signal and Power Ground for the LTC3450.
Provide a short direct PCB path between GND and the
output filter capacitor(s) on V OUT , V2X, V3X and V NEG .
C1 – (Pin 10): Charge Pump Doubler Flying Capacitor
Negative Node. The charge pump doubler flying capacitor
is connected between C1 + and C1 – . The voltage on C1 – will
alternate between GND and V OUT at an approximate 50%
duty cycle while the charge pump is operating. Use a 10nF
or larger X5R type ceramic capacitor for best results.
C1 + (Pin 11): Charge Pump Doubler Flying Capacitor
Positive Node. The charge pump doubler flying capacitor
is connected between C1 + and C1 – . The voltage on C1 + will
alternate between V OUT and V2X at an approximate 50%
duty cycle while the charge pump is operating. Use a 10nF
or larger X5R type ceramic capacitor for best results.
V2X (Pin 12): Charge Pump Doubler Output. This output
is 10.2V (nom) at no load and is capable of delivering up
to 500 μ A to a load. V2X should be bypassed to GND with
a 0.47 μ F X5R type ceramic capacitor.
C2 – (Pin 13): Charge Pump Tripler Flying Capacitor Nega-
tive Node. The charge pump tripler flying capacitor is
connected between C2 + and C2 – . The voltage on C2 – will
alternate between GND and V OUT at an approximate 50%
duty cycle while the charge pump is operating. Use a 10nF
or larger X5R type ceramic capacitor for best results.
C2 + (Pin 14): Charge Pump Tripler Flying Capacitor Posi-
tive Node. The charge pump tripler flying capacitor is
connected between C2 + and C2 – . The voltage on C2 + will
alternate between V2X and V3X at an approximate 50%
duty cycle while the charge pump is operating. Use a 10nF
or larger X5R type ceramic capacitor for best results.
Input to the Voltage Doubler Stage. Bypass V OUT with a low
ESR, ESL ceramic capacitor (X5R type) between 2.2 μ F and
10 μ F.
3450fa
6
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相关代理商/技术参数 |
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| LTC3452 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Synchronous Buck-Boost MAIN/CAMERA White LED Driver |
| LTC3452EUF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Synchronous Buck-Boost MAIN/CAMERA White LED Driver |
| LTC3452EUF#PBF | 功能描述:IC LED DRIVER PHOTO FLASH 20-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 标准包装:6,000 系列:- 恒定电流:- 恒定电压:- 拓扑:开路漏极，PWM 输出数:4 内部驱动器:是 类型 - 主要:LED 闪烁器 类型 - 次要:- 频率:400kHz 电源电压:2.3 V ~ 5.5 V 输出电压:- 安装类型:表面贴装 封装/外壳:8-VFDFN 裸露焊盘 供应商设备封装:8-HVSON 包装:带卷 (TR) 工作温度:-40°C ~ 85°C 其它名称:935286881118PCA9553TK/02-TPCA9553TK/02-T-ND |
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| LTC3453 | 制造商:LINER 制造商全称:Linear Technology 功能描述:700mA Low Noise High Current LED Charge Pump |
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