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LM2608ATLX-1.3 bảng dữ liệu(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
tên linh kiện LM2608ATLX-1.3
Giải thích chi tiết về linh kiện  400mA Sub-miniature, High Efficiency, Programmable DC-DC Converter with Linear Mode
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nhà sản xuất  NSC [National Semiconductor (TI)]
Trang chủ  http://www.national.com
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LM2608ATLX-1.3 bảng dữ liệu(HTML) 3 Page - National Semiconductor (TI)

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Pin Description
Pin Number (*)
Pin Name
Function
A1
FB
Feedback Analog Input. Connect to the output at the output filter capacitor (Figure 1)
B1
VSEL
Output Voltage Selection Input. Set this digital input to:
VDD for 1.8V output voltage (1.5V for LM2608ATL-1.3)
SGND for 1.5V output voltage (1.3V for LM2608ATL-1.3)
C1
VREF
External Reference Input. Drive this analog input with a 1.35V reference to set the output
voltage. The LM2608 uses an internal reference while in LDO mode. (see Note 5 in the
Electrical Characteristics table for further information.)
D1
SYNC/MODE
Synchronization Input. Use this digital input for frequency synchronization or mode control.
Set:
SYNC/MODE = high for low-noise 600kHz PWM mode
SYNC/MODE = low for low-current LDO mode
SYNC/MODE = 500kHz - 1MHz external clock for synchronization to an external clock in
PWM mode. See Synchronization and Operating Modes in the Device Information section.
D2
EN
Enable Input. Set this Schmitt trigger digital input high for normal operation.
D3
PGND
Power Ground
C3
SW
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 specification of the LM2608 (Figure 1)
B3
PVIN
Power Supply Input to the internal PFET switch. Connect to the input filter capacitor
(Figure 1).
A3
VDD
Analog Supply Input. If board layout is not optimum, an optional 0.1µF ceramic capacitor
is suggested (Figure 1)
A2
SGND
Analog and Control Ground
(*) Note that the pin numbering scheme for the Micro SMD package was revised in April,2002 to conform to JEDEC standard. Only the pin numbers were revised.
No changes to the physical location of the inputs/outputs were made. For reference purpose, the obsolete numbering had FB as pin 1, VSEL as pin 2, VREF as pin
3, SYNC as pin 4, EN as pin 5, PGND as pin 6, SW as pin 7, PVIN as pin 8, VDD as pin 9 and SGND as pin 10.
www.national.com
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