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參數(shù)資料
| 型號(hào)： | LT1613CS5 |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1.4MHz, Single Cell DC/DC Converter in 5-Lead SOT-23 |
| 中文描述： | SWITCHING REGULATOR, 1800 kHz SWITCHING FREQ-MAX, PDSO5 |
| 封裝： | PLASTIC, SOT-23, 5 PIN |
| 文件頁(yè)數(shù)： | 5/12頁(yè) |
| 文件大小： | 257K |
| 代理商： | LT1613CS5 |
5
LT1613
OPERATIOU
LAYOUT
The LT1613 switches current at high speed, mandating
careful attention to layout for proper performance. You
will not get advertised performance with careless layouts.
Figure 2 shows recommended component placement for
a boost (step-up) converter. Follow this closely in your
PCB layout. Note the direct path of the switching loops.
Input capacitor C1 mustbe placed close (<5mm) to the IC
package. As little as 10mm of wire or PC trace from C
IN
to
V
IN
will cause problems such as inability to regulate or
oscillation.
The ground terminal of output capacitor C2 should tie
close to Pin 2 of the LT1613. Doing this reduces dI/dt in the
ground copper which keeps high frequency spikes to a
minimum. The DC/DC converter ground should tie to the
PC board ground plane at one place only, to avoid intro-
ducing dI/dt in the ground plane.
A SEPIC (single-ended primary inductance converter)
schematic is shown in Figure 3. This converter topology
produces a regulated output voltage that spans (i.e., can
be higher or lower than) the output. Recommended com-
ponent placement for a SEPIC is shown in Figure 4.
D1
1613 F02
GROUND
VIAS TO
GROUND
PLANE
SHUTDOWN
V
IN
L1
V
OUT
R2
R1
+
C2
+
C1
1
5
2
3
4
Figure 2. Recommended Component Placement for Boost
Converter. Note Direct High Current Paths Using Wide PCB
Traces. Minimize Area at Pin 3 (FB). Use Vias to Tie Local
Ground Into System Ground Plane. Use Vias at Location Shown
to Avoid Introducing Switching Currents Into Ground Plane
V
IN
V
5V/150mA
C2
15
μ
F
1613 F03
SW
L1A
22
μ
H
L1B
22
μ
H
D1
GND
LT1613
C1, C2: AVX TAJA156M016
C3: TAIYO YUDEN JMK325BJ226MM
D1: MOTOROLA MBR0520
L1, L2: MURATA LQH3C220
R2
32.4k
R1
100k
C3
1
μ
F
FB
SHDN
C1
15
μ
F
V
IN
4V TO
7V
+
+
SHDN
Figure 3. Single-Ended Primary Inductance Converter (SEPIC)
Generates 5V from An Input Voltage Above or Below 5V
D1
C3
1613 F04
GROUND
VIAS TO
GROUND
PLANE
SHUTDOWN
V
IN
L1A
L1B
V
OUT
R2
R1
+
C2
+
C1
1
5
2
3
4
Figure 4. Recommended Component Placement for SEPIC
COMPONENT SELECTION
Inductors
Inductors used with the LT1613 should have a saturation
current rating (where inductance is approximately 70% of
zero current inductance) of approximately 0.5A or greater.
DCR of the inductors should be 0.5
or less. For boost
converters, inductance should be 4.7
μ
H for input voltage
less than 3.3V and 10
μ
H for inputs above 3.3V. When
using the device as a SEPIC, either a coupled inductor or
two separate inductors can be used. If using separate
inductors, 22
μ
H units are recommended for input voltage
above 3.3V. Coupled inductors have a beneficial mutual
inductance, so a 10
μ
H coupled inductor results in the
same ripple current as two 20
μ
H uncoupled units.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT1613CS5#PBF | 制造商:Linear Technology 功能描述:1 34V 1.1V to 10V TSOT-23-5 制造商:Linear Technology 功能描述:DC/DC 1.1VIN MIN 1.4MHZ 34V 5SOT23 制造商:Linear Technology 功能描述:DC/DC, 1.1VIN MIN, 1.4MHZ, 34V, 5SOT23 制造商:Linear Technology 功能描述:IC, DC/DC CONVERTER, 5-SOT-23; Primary Input Voltage:10V; No. of Outputs:1; Output Voltage:34V; Output Current:200mA; No. of Pins:5; Operating Temperature Min:0C; Operating Temperature Max:70C; MSL:MSL 1 - Unlimited ;RoHS Compliant: Yes |
| LT1613CS5#PBF | 制造商:Linear Technology 功能描述:IC DC/DC CONVERTER 5-SOT-23 制造商:Linear Technology 功能描述:IC, DC/DC CONVERTER, 5-SOT-23 |
| LT1613CS5#TR | 功能描述:IC REG BST FLYBACK SEPIC TSOT23 RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開(kāi)關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:500 系列:- 類型:切換式電容器（充電泵），反相 輸出類型:固定 輸出數(shù):1 輸出電壓:-3V 輸入電壓:2.3 V ~ 5.5 V PWM 型:Burst Mode? 頻率 - 開(kāi)關(guān):900kHz 電流 - 輸出:100mA 同步整流器:無(wú) 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 細(xì)型，TSOT-23-6 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:TSOT-23-6 其它名稱:LTC1983ES6-3#TRMTR |
| LT1613-CS5#TR | 制造商:Linear Technology 功能描述: |
| LT1613CS5#TRM | 功能描述:IC REG BST FLYBACK SEPIC TSOT23 RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開(kāi)關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:500 系列:- 類型:切換式電容器（充電泵），反相 輸出類型:固定 輸出數(shù):1 輸出電壓:-3V 輸入電壓:2.3 V ~ 5.5 V PWM 型:Burst Mode? 頻率 - 開(kāi)關(guān):900kHz 電流 - 輸出:100mA 同步整流器:無(wú) 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 細(xì)型，TSOT-23-6 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:TSOT-23-6 其它名稱:LTC1983ES6-3#TRMTR |
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