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參數(shù)資料
| 型號(hào)： | LTC1754-5 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Micropower, Regulated 3.3V/5V Charge Pump with Shutdown in SOT-23 |
| 中文描述： | 微功耗，穩(wěn)壓3.3V/5V的電荷關(guān)機(jī)泵采用SOT - 23 |
| 文件頁(yè)數(shù)： | 8/12頁(yè) |
| 文件大?。?/td> | 201K |
| 代理商： | LTC1754-5 |
8
LTC1754-3.3/LTC1754-5
Layout Considerations
Due to high switching frequency and high transient cur-
rents produced by the LTC1754, careful board layout is
necessary. A true ground plane and short connections to
all capacitors will improve performance and ensure proper
regulation under all conditions. Figure 4 shows the recom-
mended layout configuration
Figure 4. Recommended Layout
signal will keep V
OUT
in regulation under no-load condi-
tions. As the V
OUT
load current increases, the frequency
with which the LTC1754 is taken out of shutdown must
also be increased.
Figure 2. Ultralow Quiescent Current Regulated Supply
Figure 3. No-Load Supply Current vs Supply Voltage
for the Circuit Shown in Figure 2
SUPPLY VOLTAGE (V)
2.0
S
μ
A
4
5
6
3.5
4.5
1754 F03
3
2
2.5
3.0
4.0
5.0
5.5
1
0
T
A
= 25
°
C
I
OUT
= 0
μ
A
C
FLY
= 1
μ
F
LTC1754-5
LTC1754-3.3
LTC1754-X
V
IN
V
OUT
GND
1754-5 F04
SHDN
10
μ
F
10
μ
F
1
μ
F
C
+
1
2
3
6
5
4
LTC1754-X
GND
V
IN
C
–
V
OUT
1754 F02
V
IN
V
OUT
LOW I
Q
MODE (2Hz TO 100Hz, 2% TO 5% DUTY CYCLE)
10
μ
F
1
μ
F
10
μ
F
SHDN PIN
WAVEFORM
SHDN
Thermal Management
For higher input voltages and maximum output current,
there can be substaintial power dissipation in the LTC1754.
If the junction temperature increases above approximately
150
°
C, the thermal shutdown circuitry will automatically
deactivate the output. To reduce the maximum junction
temperature, a good thermal connection to the PC board
is recommended. Connecting the GND pin (Pin 2) to a
ground plane and maintaining a solid ground plane under
the device on at least two layers of the PC board can reduce
the thermal resistance of the package and PC board
system to about 150
°
C/W.
APPLICATIOU
W
U
U
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC1754ES6-3.3 | 制造商:Linear Technology 功能描述:Charge Pump STPUP 3.3V 40mA 6-Pin TSOT-23 |
| LTC1754ES6-3.3#PBF | 制造商:Linear Technology 功能描述:Charge Pump STPUP 3.3V 40mA 6-Pin TSOT-23 |
| LTC1754ES6-3.3#TR | 功能描述:IC REG SWITCHED CAP 3.3V SOT23-6 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(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 |
| LTC1754ES6-3.3#TRM | 功能描述:IC REG SWITCHED CAP 3.3V SOT23-6 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(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 |
| LTC1754ES6-3.3#TRMPBF | 功能描述:IC REG SWITCHED CAP 3.3V SOT23-6 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: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(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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