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參數資料
| 型號： | LM2619MTCX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 500mA Step-Down DC-DC Converter |
| 中文描述： | 1.1 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO14 |
| 封裝： | MO-153AB, TSSOP-14 |
| 文件頁數： | 3/16頁 |
| 文件大?。?/td> | 799K |
| 代理商： | LM2619MTCX |
Connection Diagrams
14-Pin TSSOP
20065104
Top View
Ordering Information
Order Number
Package Type
NSC Package
Drawing
MTC14
MTC14
Supplied As
LM2619MTC
LM2619MTCX
TSSOP - 14
94 Rail
2500 Tape and Reel
Pin Description
Pin Number
1
Pin Name
EN
Function
Enable Input. Set this Schmitt trigger digital input high for normal operation. For shutdown,
set low. Set EN low during system power-up and other low supply voltage conditions.
(See
Shutdown Mode
in the
Device Information
section.)
Synchronization Input. Use this digital input for frequency selection or modulation control.
Set:
SYNC/MODE = high for low-noise 600kHz PWM mode
SYNC/MODE = low for low-current PFM mode
SYNC/MODE = a 500kHz–1MHz external clock for synchronization in PWM mode. (See
Synchronization and Operating Modes
in the
Device Information
section.)
Output of error amplifier.
Inverting Input of Error Amplifier.
Feedback Analog Input.
Analog and Control Ground.
Analog Supply Input. If board layout is not optimum, an optional 0.1μF ceramic capacitor
is suggested from this pin to SGND.
Power Supply Voltage Input to the internal PFET switch. Connect to the input filter
capacitor.
Switching Node connection to the internal PFET switch and NFET synchronous rectifier.
Connect to an inductor with a saturation current rating that exceeds the max Switch Peak
Current Limit of the LM2619MTC.
Power Ground.
2
SYNC/MODE
3
4
5
6
EAOUT
EANEG
FB
SGND
VDD
7,8
9,10
PVIN
11,12
SW
13,14
PGND
L
www.national.com
3
PrintDate=2003/08/20 PrintTime=18:54:04 801627bc ds200651_p Rev. No. 1.25
cmserv
Proof
Seq=3
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