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參數(shù)資料
| 型號： | 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 |
| 文件頁數(shù)： | 7/12頁 |
| 文件大?。?/td> | 257K |
| 代理商： | LT1613CS5 |
7
LT1613
OPERATIOU
resulting in a severely underdamped response. By adding
R3 and C
PL
as detailed in Figure 8’s schematic, phase
margin is restored, and transient response to the same
load step is pictured in Figure 9. R3 isolates the device FB
pin from fast edges on the V
OUT
node due to parasitic PC
trace inductance.
Figure 10’s circuit details a 5V to 12V boost converter,
delivering up to 130mA. The transient response to a load
step of 10mA to 130mA, without C
PL
, is pictured in
Figure11. Although the ringing is less than that of the
previous example, the response is still underdamped and
can be improved. After adding R3 and C
PL
, the improved
transient response is detailed in Figure 12.
Figure 13 shows a SEPIC design, converting a 3V to 10V
input to a 5V output. The transient response to a load step
of 20mA to 120mA, without C
PL
and R3, is pictured in
Figure14. After adding these two components, the im-
proved response is shown in Figure 15.
effect on loop stability, as long as minimum capacitance
requirements are met). The transient response to a load
step of 50mA to 100mA is pictured in Figure 6. Note the
“double trace,” due to the ESR of C2. The loop is stable and
settles in less than 100
μ
s. In Figure 7, C2 is replaced by a
10
μ
F ceramic unit. Phase margin decreases drastically,
V
IN
V
OUT
5V
1613 F05
SW
L1
10
μ
H
D1
GND
LT1613
C1: AVX TAJA156M010R
C2: AVX TAJA226M006R
D1: MOTOROLA MBR0520
L1: MURATA LQH3C100
R2
12.1k
R1
37.4k
FB
SHDN
C1
15
μ
F
V
IN
2.5V
+
C2
22
μ
F
+
SHDN
Figure 5. 2.5V to 5V Boost Converter with “A”
Case Size Tantalum Input and Output Capacitors
V
IN
V
OUT
5V
C
PL
330pF
1613 F08
SW
L1
10
μ
H
D1
GND
LT1613
C1: AVX TAJA156M010R
C2: TAIYO YUDEN LMK325BJ106MN
D1: MBR0520
L1: MURATA LQH3C100K04
R2
12.1k
R3
10k
R1
37.4k
FB
SHUTDOWN
C1
15
μ
F
V
IN
2.5V
C2
10
μ
F
SHDN
+
V
OUT
20mV/DIV
AC COUPLED
LOAD CURRENT
100mA
50mA
200
μ
s/DIV
1613 F06
Figure 6. 2.5V to 5V Boost Converter Transient
Response with 22
μ
F Tantalum Output Capacitor.
Apparent Double Trace on V
OUT
Is Due to Switching
Frequency Ripple Current Across Capacitor ESR
V
OUT
20mV/DIV
AC COUPLED
LOAD CURRENT
100mA
50mA
200
μ
s/DIV
1613 F07
Figure 7. 2.5V to 5V Boost Converter with
10
μ
F Ceramic Output Capacitor, No C
PL
Figure 8. 2.5V to 5V Boost Converter with Ceramic
Output Capacitor. C
PL
Added to Increase Phase Margin,
R3 Isolates FB Pin from Fast Edges
V
OUT
20mV/DIV
AC COUPLED
LOAD CURRENT
100mA
50mA
200
μ
s/DIV
1613 F09
Figure 9. 2.5V to 5V Boost Converter with 10
μ
F Ceramic
Output Capacitor, 330pF C
PL
and 10k in Series with FB Pin
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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 - 開關(guān):900kHz 電流 - 輸出:100mA 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:SOT-23-6 細型，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 - 開關(guān):900kHz 電流 - 輸出:100mA 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:SOT-23-6 細型，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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