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參數(shù)資料
| 型號(hào)： | LT3582EUD-12#PBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.72 A SWITCHING REGULATOR, PQCC16 |
| 封裝： | 3 X 3 MM, LEAD FREE, PLASTIC, MO-220WEED-2, QFN-16 |
| 文件頁數(shù)： | 14/28頁 |
| 文件大小： | 315K |
| 代理商： | LT3582EUD-12#PBF |
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LT3582/LT3582-5/LT3582-12
21
3582512fb
APPLICATIONS INFORMATION
Note that the ripple voltage on VOUTP will typically increase
in this conguration since the output disconnect PMOS,
when not shorted, helps to create an RC lter at the
output. Also, if the VOUTP pin is shorted to CAPP, the
power-down discharge should not be enabled. VOUTP
cannot be discharged to ground during shutdown due to
the path from VIN to VOUTP through the external inductor
and diode. Finally, due to the path from VIN to VOUTP,
current will ow through the integrated feedback resistor
whenever voltage is present on VIN.
Inrush Current
When the Boost inductor input voltage (usually VIN) is
stepped from ground to the operating voltage, a high
level of inrush current may ow through the inductor
and Schottky diode into the CAPP capacitor. Conditions
that increase inrush current include a larger more abrupt
voltage step at the inductor input, larger CAPP capacitors
and inductors with low inductances and/or low saturation
currents. For circuits that use output capacitor values within
the recommended range and have input voltages of less
than 5V, inrush current remains low, posing no hazard to
the devices. In cases where there are large input voltage
steps (more than 5V) and/or a large CAPP capacitor is
used, inrush current should be measured to ensure safe
operation.
Thermal Lockout
If the die temperature reaches approximately 147°C, the
part will go into thermal lockout. In this event, the chip
is reset which turns off the power switches and starts to
discharge the RAMP capacitors. The part will be re-enabled
when the die temperature drops by about 3.5°C.
Board Layout Considerations
As with all switching regulators, careful attention must be
paid to the PCB board layout and component placement. To
maximize efciency, switch rise and fall times are made as
short as possible. To prevent electromagnetic interference
(EMI) problems, proper layout of the high frequency
switching path is essential. The voltage signals of the
SWP and SWN pins have sharp rising and falling edges.
Minimize the length and area of all traces connected to
the SWP/SWN pins and always use a ground plane under
the switching regulator to minimize interplane coupling.
Suggested component placement is shown in Figure 12.
Make sure to include the ground plane cuts as shown in
Figure 12. The switching action of the regulators can cause
large current steps in the ground plane. The cuts reduce
noise by recombining the current steps into a continuous
ow under the chip, thus reducing di/dt related ground
noise in the ground plane.
Figure 12. Suggested Component Placement (Not to Scale)
GROUND PLANE
VIAS TO GROUND PLANE UNDER
PIN 17 REQUIRED TO IMPROVE
THERMAL PERFORMANCE
3582512 F13
VOUTP
COUTP
CCAPP
COUTN
VOUTN
GND
VIN
CIN
CVPP
(OPT)
CA
16
1
2
3
4
56
7
8
15
14
13
12
11
10
9
SCL
SDA
VPP
L1
L2
17
SHDN
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| LT3582EUD-12TRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:I2C Programmable Boost and Single Inductor Inverting DC/DC Converters with OTP |
| LT3582EUD-5#PBF | 功能描述:IC REG BOOST INV +/-5V DL 16QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:升壓（升壓） 輸出類型:可調(diào)式 輸出數(shù):1 輸出電壓:1.24 V ~ 30 V 輸入電壓:1.5 V ~ 12 V PWM 型:電流模式，混合 頻率 - 開關(guān):600kHz 電流 - 輸出:500mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:8-SOIC |
| LT3582EUD-5#TRPBF | 功能描述:IC REG BOOST INV +/-5V DL 16QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:升壓（升壓） 輸出類型:可調(diào)式 輸出數(shù):1 輸出電壓:1.24 V ~ 30 V 輸入電壓:1.5 V ~ 12 V PWM 型:電流模式，混合 頻率 - 開關(guān):600kHz 電流 - 輸出:500mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:8-SOIC |
| LT3582EUD-5PBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:I2C Programmable Boost and Single Inductor Inverting DC/DC Converters with OTP |
| LT3582EUD-5TRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:I2C Programmable Boost and Single Inductor Inverting DC/DC Converters with OTP |
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