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參數(shù)資料
| 型號： | LT3472 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Inverting Micropower DC/DC Converter with Schottky in ThinSOT Package |
| 中文描述： | 反向微功率DC / DC變換器的ThinSOT封裝的肖特基 |
| 文件頁數(shù)： | 4/8頁 |
| 文件大?。?/td> | 150K |
| 代理商： | LT3472 |
4
LT3483
3483f
BLOCK DIAGRA
–
+
–
+
6
3
1
2
5
A3
300ns
DELAY
1.250V
REFERENCE
S
Q1
20mV
SW
D
L1B
L1A
C
FLY
C
OUT
V
OUT
0.1
0.1
GND
3483 BD
–
+
25mV
D1
Q
R
Q
A1
A2
125k
R1
R2
V
OUT
D
D2
V
IN
V
IN
FB
OPTIONAL CHARGE PUMP CONFIGURATION.
L1B REPLACED WITH:
V
OUT
OPERATIOU
The LT3483 uses a constant off-time control scheme to
provide high efficiency over a wide range of output cur-
rents. Operation can be best understood by referring to the
Block Diagram. When the voltage at the FB pin is approxi-
mately 0V, comparator A3 disables most of the internal cir-
cuitry. Output current is then provided by external capacitor
C
OUT
, which slowly discharges until the voltage at the FB
pin goes above the hysteresis point of A3. Typical hyster-
esis at the FB pin is 10mV. A3 then enables the internal
circuitry, turns on power switch Q1, and the currents in
external inductors L1A and L1B begin to ramp up. Once the
switch current reaches 200mA, comparator A1 resets the
latch, which turns off Q1 after about 80ns. Inductor cur-
rent flows through the internal Schottky D1 to GND, charg-
ing the flying capacitor. Once the 300ns off-time has
elapsed, and internal diode current drops below 250mA
(as detected by comparator A2), Q1 turns on again and
ramps up to 200mA. This switching action continues until
the output capacitor charge is replenished (until the FB pin
decreases to 0V), then A3 turns off the internal circuitry
and the cycle repeats. The inverting charge pump topology
replaces L1B with the series combination D2 and R2.
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| LT3483 | Inverting Micropower DC/DC Converter with Schottky in ThinSOT Package |
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參數(shù)描述 |
|---|---|
| LT3472EDD | 功能描述:IC REG BOOST INV ADJ 50MA 10DFN 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:- 標準包裝: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 |
| LT3472EDD#PBF | 功能描述:IC REG BOOST INV ADJ 50MA 10DFN 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:- 標準包裝:250 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.2V 輸入電壓:2.05 V ~ 6 V PWM 型:電壓模式 頻率 - 開關(guān):2MHz 電流 - 輸出:500mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:6-UFDFN 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:6-SON（1.45x1） 產(chǎn)品目錄頁面:1032 (CN2011-ZH PDF) 其它名稱:296-25628-2 |
| LT3472EDD#PBF | 制造商:Linear Technology 功能描述:DC-DC CONVERTER BOOST 1.1MHZ 制造商:Linear Technology 功能描述:DC-DC CONVERTER, BOOST, 1.1MHZ, DFN-10 |
| LT3472EDD#TR | 功能描述:IC REG BOOST INV ADJ 50MA 10DFN 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:- 標準包裝: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 |
| LT3472EDD#TRPBF | 功能描述:IC REG BOOST INV ADJ 50MA 10DFN 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:- 標準包裝: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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