- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄44991 > LTC3526BEDC-2 (LINEAR TECHNOLOGY CORP) 0.5 A SWITCHING REGULATOR, 2400 kHz SWITCHING FREQ-MAX, PDSO6 PDF資料下載
參數(shù)資料
| 型號： | LTC3526BEDC-2 |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.5 A SWITCHING REGULATOR, 2400 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封裝： | 3 X 3 MM, PLASTIC, MO-229WEED-2, DFN-10 |
| 文件頁數(shù)： | 2/16頁 |
| 文件大?。?/td> | 298K |
| 代理商： | LTC3526BEDC-2 |
LTC3526-2/LTC3526B-2
10
35262b2f
APPLICATIO S I FOR ATIO
WU
U
VIN > VOUT OPERATION
The LTC3526-2/LTC3526B-2 will maintain voltage regula-
tion even when the input voltage is above the desired output
voltage. Note that the efciency is much lower in this mode,
and the maximum output current capability will be less.
Refer to the Typical Performance Characteristics.
SHORT-CIRCUIT PROTECTION
The LTC3526-2/LTC3526B-2 output disconnect feature
allows output short circuit while maintaining a maximum
internally set current limit. To reduce power dissipation
under short-circuit conditions, the peak switch current
limit is reduced to 400mA (typical).
SCHOTTKY DIODE
Although it is not required, adding a Schottky diode from
SW to VOUT will improve efciency by about 2%. Note
that this defeats the output disconnect and short-circuit
protection features.
PCB LAYOUT GUIDELINES
The high speed operation of the LTC3526-2/LTC3526B-2
demands careful attention to board layout. A careless
layout will result in reduced performance. Figure 1 shows
the recommended component placement. A large ground
pin copper area will help to lower the die temperature. A
multilayer board with a separate ground plane is ideal, but
not absolutely necessary.
COMPONENT SELECTION
Inductor Selection
The LTC3526-2/LTC3526B-2 can utilize small surface
mount chip inductors due to their fast 2MHz switching
frequency. Inductor values between 1.5H and 3.3H are
suitable for most applications. Larger values of inductance
will allow slightly greater output current capability (and
lower the Burst Mode threshold) by reducing the inductor
ripple current. Increasing the inductance above 10H will
increase size while providing little improvement in output
current capability.
The minimum inductance value is given by:
L
VV
V
RIPPLE V
IN MIN
OUT MAX
IN MIN
OU
>
()
(
)
()
2
T
TMAX
()
where:
Ripple = Allowable inductor current ripple (amps peak-
peak)
VIN(MIN) = Minimum input voltage
VOUT(MAX) = Maximum output voltage
The inductor current ripple is typically set for 20% to
40% of the maximum inductor current. High frequency
ferrite core inductor materials reduce frequency depen-
dent power losses compared to cheaper powdered iron
types, improving efciency. The inductor should have
low ESR (series resistance of the windings) to reduce the
I2R power losses, and must be able to support the peak
Figure 1. Recommended Component Placement for Single Layer Board
+
SW
LTC3526-2
1
GND
MINIMIZE
TRACE ON FB
AND SW
2
VIN
MULTIPLE VIAS
TO GROUND PLANE
VIN
VOUT
FB
SHDN
35262b2f F01
3
6
5
4
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC3526EDC | 0.5 A SWITCHING CONTROLLER, 1300 kHz SWITCHING FREQ-MAX, PDSO6 |
| LTC3526BEDC | 0.5 A SWITCHING CONTROLLER, 1300 kHz SWITCHING FREQ-MAX, PDSO6 |
| LTC3526LBEDC-2#PBF | SWITCHING REGULATOR, 2400 kHz SWITCHING FREQ-MAX, PDSO6 |
| LTC3526LEDC-2#PBF | SWITCHING REGULATOR, 2400 kHz SWITCHING FREQ-MAX, PDSO6 |
| LTC3526LBEDC-2#TRPBF | SWITCHING REGULATOR, 2400 kHz SWITCHING FREQ-MAX, PDSO6 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC3526BEDC-2#TRMPBF | 功能描述:IC REG BOOST SYNC ADJ 0.5A 6DFN 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 |
| LTC3526BEDC-2#TRPBF | 功能描述:IC REG BOOST SYNC ADJ 0.5A 6DFN 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 |
| LTC3526BEDC-2-PBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:500mA 2MHz Synchronous Step-Up DC/DC Converters in 2mm × 2mm DFN |
| LTC3526BEDC-2-TRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:500mA 2MHz Synchronous Step-Up DC/DC Converters in 2mm × 2mm DFN |
| LTC3526BEDC-PBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:500mA 1MHz Synchronous Step-Up DC/DC Converters in 2mm × 2mm DFN |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。