參數(shù)資料
型號(hào): LTC1551
廠商: Linear Technology Corporation
英文描述: Low Noise, Switched Capacitor Regulated Voltage Inverters()
中文描述: 低噪聲,開關(guān)電容穩(wěn)壓逆變器()
文件頁數(shù): 9/12頁
文件大?。?/td> 287K
代理商: LTC1551
9
LTC1550/LTC1551
APPLICATIO
S I
FOR
ATIO
U
noise –4.1V generator which uses a ferrite bead output
filter to achieve better than 1mV
P-P
noise and output
ripple. The corresponding spectrum and spot noise plots
for this circuit are shown in the Typical Performance
Characteristics section.
W
U
U
Output Ripple vs Input Bypass Capacitor
The input bypass capacitor (C
IN
) can also have a fairly
significant impact on the output ripple. C
IN
provides most
of the LTC1550/LTC1551’s supply current while it is
charging the flying capacitor (C1). Inadequate input bypass
can cause the V
CC
supply to dip when the charge pump
switches, causing the output linear regulator to momentarily
stop regulating. C
IN
should be mounted as close to the
LTC1550/LTC1551 as possible and its value should be
significantly larger than C1. Tantalum capacitors with low
ESR generally provide adequate performance. Figure 6
shows the LTC1550/LTC1551 peak-to-peak output ripple
vs C
IN
, taken using the test circuit in Figure 2 with I
LOAD
set
at 5mA. C
OUT
is a 10
μ
F in parallel with a 0.1
μ
F ceramic
capacitor.
A 4.7
μ
F tantalum capacitor at V
CC
generally provides
adequate output ripple performance for most applica-
tions.
–4.1V Output GaAs FET Bias Generator
Figure 6. Output Ripple vs Input Bypass Capacitance
INPUT CAPACITANCE (
μ
F)
0.1
O
P
)
8
7
6
5
4
3
2
1
0
1
10
100
LTC1550/51 F07
V
CC
= 6V
T
A
= 25
°
C
C
OUT
= 10
μ
F
TYPICAL APPLICATIO
N
U
1
2
4.5V
V
CC
6.5V
+
8
7
SENSE
CP
OUT
SHDN
V
CC
C1
+
V
OUT
LTC1550
–4.1V BIAS
GND
C1
C
OUT
10
F
1550/51 TA02
C
CP
0.1
μ
F
GaAs
TRANSMITTER
C1
0.1
μ
F
C
IN
4.7
μ
F
3
4
6
5
C
L
0.1
μ
F
+
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LTC1551CS8-4.1#PBF 功能描述:IC REG SWITCHED CAP INV 8SOIC 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
LTC1551CS8-4.1#TR 功能描述:IC REG SWITCHED CAP INV 8SOIC 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: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
LTC1551CS8-4.1#TRPBF 功能描述:IC REG SWITCHED CAP INV 8SOIC 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
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