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SM8237 数据表(PDF) 3 Page - SamHop Microelectronics Corp.

部件名 SM8237
功能描述  1.2MHz STEP-UP CONVERTER
Download  14 Pages
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制造商  SAMHOP [SamHop Microelectronics Corp.]
网页  http://www.samhop.com.tw
标志 SAMHOP - SamHop Microelectronics Corp.

SM8237 数据表(HTML) 3 Page - SamHop Microelectronics Corp.

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SAMHOP Microelectronics Corp.
1.2MHz STEP-UP CONVERTER
MAXIMUM RATINGS
Input voltage (VIN)
10
V
Characteristic
Unit
Rating
SW voltage
36
V
FB voltage
10
V
SHDN voltage
10
V
Operating temperature range
-40 ~ 85
Maximum junction temperature
125
V
Storage temperature range
- 65 ~ 150
V
Lead temperature (soldering, 10 sec)
300
V
oC
Page 2
PIN DESCRIPTIONS
NO.
Function
Pin name
1
SW
Switch Pin. Connect inductor / diode here.
Minimize trace area at this pin to reduce EMI.
2
GND
Ground Pin. Connect directly to local ground plane
3
FB
Feedback Pin. Reference voltage is 95mV. Connect
cathode of lowest LED and resistor here. Calculate
resistor value according to the formula:
RFB =95mV/ILED
4
SHDN
Shutdown Pin. Connect to 1.5V or higher to enable
device; 0.4V or less to disable device.
5
GND (SOT-26)
Ground Pin. Connect to Pin 2 and local ground
plane.
6
VIN (SOT-26)
Input supply Pin. Must be locally bypassed.
APPLICATIONS
* Cellular phone
* PDAs, handheld computer
* Digital camera
* MP3 player
* GPS receiver
* DC to DC Converter
PIN ASSIGNMENTS (TOP VIEW)
SOT-25
1
3
2
FB
GND
VIN
SHDN
5
4
SW
SOT-26
1
3
2
SW
FB
GND
VIN
SHDN
GND
6
4
5
TSOT-25
(TSOT-23-5)
1
3
2
FB
GND
VIN
SHDN
5
4
SW
V.1.3 Aug 28,2007


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