SD46520 Datasheet, PDF (2/8 Pages) Silan Microelectronics Joint-stock – 400KHZ 2A STEP-DOWN DC-DC CONVERTER

BLOCK DIAGRAM
IN
2
Internal _3.3V
Regulators
Current Sense
++
∑
Amplifier
EN
7
CLK
Oscillator
50/400kHz
Shutdown ^1.8V
comparator
1uA
5V
SQ
RQ
Current
Comparator
2.30/2.53V _UVLO
Zero
current
control
Frequency
Foldback
Comparator
0.7V
1.22V
FB
5
Error
Amplifier
COMP
6
ABSOLUTE MAXIMUM RATINGS
Characteristics
Input Voltage
Switch Voltage
Boost Voltage
Feedback Voltage
Enable Voltage
Comp Voltage
Junction Temperature
Lead Temperature
Storage Temperature
Symbol
VIN
VSW
VBS
VFB
VEN
VCOMP
Tj
TL
Tstg
Ratings
20
-1~VIN+1
VSW+6
-0.3~6
-0.3~6
-0.3~6
150
260
-65~150
SD46520
BS
1
SW
3
GND
4
Unit
V
V
V
V
V
V
°C
°C
°C
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http://www.silan.com.cn
REV:1.0 2009.04.07
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