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參數(shù)資料
| 型號： | LM3211 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Step-up PWM DC/DC Converter Integrated with 4 Buffers |
| 中文描述： | 升壓PWM直流/直流轉(zhuǎn)換器集成有4緩沖器 |
| 文件頁數(shù)： | 3/21頁 |
| 文件大?。?/td> | 821K |
| 代理商： | LM3211 |
Pin Functions
V
SW
(Pin 1):
This is the drain of the internal NMOS power
switch. Minimize the metal trace area connected to this pin to
minimize EMI.
V
IN
(Pin 2):
Input Supply Pin. Bypass this pin with a capacitor
as close to the device as possible. The capacitor should
connect between V
IN
and GND.
SHDN(Pin 3)
: Shutdown Pin. The shutdown pin signal is
active low. A voltage of less than 0.3V disables the device. A
voltage greater than 0.85V enables the device.
FSLCT(Pin 4):
Frequency Select Pin. Connecting FSLCT to
AGND selects a 600 kHz operating frequency for the switch-
ing regulator. Connecting FSLCT to V
IN
selects a 1.25 MHz
operating frequency. If FSLCT is left floating, the switching
frequency defaults to 600 kHz.
Vs+(Pin 5):
Supply pin for the four Gamma buffers. Bypass
this pin with a capacitor as close to the device as possible.
The capacitor should connect between Vs+ and GND.
GMA1-in(Pin 6):
Gamma Buffer input pin.
GMA2-in(Pin 7):
Gamma Buffer input pin.
GMA3-in(Pin 8):
Gamma Buffer input pin.
GMA4-in(Pin 9):
Gamma Buffer input pin.
NC(Pin 10):
No Connection.
NC(Pin 11):
No Connection.
Ordering Information
GMA4-out(Pin 12):
Gamma Buffer output pin.
GMA3-out(Pin13):
Gamma Buffer output pin.
GMA2-out(Pin 14):
Gamma Buffer output pin.
GMA1-out(Pin 15):
Gamma Buffer output pin.
SS(Pin 16):
Softstart pin. Connect capacitor to SS pin and
AGND to slowly ramp inductor current on startup.
V
C
(Pin 17):
Compensation Network for Boost switching
regulator. Connect resistor/capacitor network between V
C
pin and AGND for boost switching regulator AC compensa-
tion.
FB(Pin 18):
Feedback pin. Set the output voltage by select-
ing values of R1 and R2 using:
Connect the ground of the feedback network to the AGND
plane, which can be tied directly to the GND pin.
AGND(Pin 19):
Analog ground pin. Ground connection for
the Gamma buffers and the boost switching regulator.AGND
must be tied directly to GND at the pins.
GND(Pin 20):
Power ground pin. Ground connection for the
NMOS power device of the boost switching regulator. GND
must be tied directly to AGND at the pins.
Order Number
LM3211MT-ADJ
LM3211MTX-ADJ
Package Type
TSSOP-20
TSSOP-20
NSC Package Drawing
MTC20
MTC20
Supplied As
73 Units, Rail
2500 Units, Tape and Reel
L
www.national.com
3
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| LM3211MTX-ADJ | Step-up PWM DC/DC Converter Integrated with 4 Buffers |
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相關代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM3211MT-ADJ | 制造商:Texas Instruments 功能描述:CONVERTER DC-DC BOOST SMD 3211 |
| LM3211MT-ADJ/NOPB | 功能描述:IC REG BOOST 8V 1.4A 20-TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3.3V 輸入電壓:4.5 V ~ 24 V PWM 型:- 頻率 - 開關:- 電流 - 輸出:125mA 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 包裝:Digi-Reel® 供應商設備封裝:SOT-6 其它名稱:MAX1836EUT33#TG16DKR |
| LM3211MTX-ADJ | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Step-up PWM DC/DC Converter Integrated with 4 Buffers |
| LM3211MTX-ADJ/NOPB | 功能描述:DC/DC 開關控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| LM3212 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:LM3212 PRODUCT BRIEF Step-Down DC-DC Converter with Analog Bypass Mode for RF Power Amplifiers |
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