900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf






AXElite

AX3821 Datasheet Preview

AX3821 Datasheet

600KHz Synchronous Rectified Step-Down Converter

No Preview Available !

AX3821
1.6A, 13V, 600KHz Synchronous Rectified
Step-Down Converter
GENERAL DESCRIPTION
The AX3821 is a monolithic synchronous buck regulator. The device integrates two
100mΩ MOSFETs, and provides 1.6A of continuous load current over a wide input voltage of
4.5V to 13V. Current mode control provides fast transient response and cycle-by-Cycle
current limit.
Internal soft-start prevents inrush current at turn-on, and in shutdown mode the supply
current drops to 1μA.
This device, available in SOT-23-6L package, provides a very compact solution with
minimal external components.
FEATURES
- 1.6A Output Current
- Wide 4.5V to 13V Operating Input Range
- Integrated 100mΩ Power MOSFET Switches
- Output adjust from VFB to 11V
- Internal compensation
- Up to 94% Efficiency
- Stable with Low ESR Ceramic Output Capacitors
- Fixed 600KHz Frequency
- Cycle-by-Cycle Over Current Protection
- Thermal shutdown and short circuit protections
BLOCK DIAGRAM
OSCILLATOR
RAMP
FB
CLK
100KHz/600KHz
-
0.6V +
ERROR
AMPLIFIER
EN +
1.5V -
SHUTDOWN
COMPARATOR
CURRENT
SENSE
AMPLIFIER
+ SQ
RQ
- CURRENT
COMPARATOR
IN
+
5
-V
M1
100mΩ
BS
SW
M2
100mΩ
GND
GND
IN
INTERNAL
REGULATORS
5V
1/9
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.2 May.08, 2013




AXElite

AX3821 Datasheet Preview

AX3821 Datasheet

600KHz Synchronous Rectified Step-Down Converter

No Preview Available !

AX3821
PIN ASSIGNMENT
The package of AX3821 is SOT-23-6L; the pin assignment is given by:
Name
Description
Bootstrap. A 10nF capacitor is connected
BS
between SW and BS pins to drive the
power switch’s gate above the supply
voltage.
(Top View)
GND
Ground Pin. Connect this pin to exposed
pad.
Feedback. An external resistor divider
BS 1
6 SW
FB from the output to GND, tapped to the FB
pin sets the output voltage.
GND 2
5 VIN
Power Supply Input. Drive 4.5V to 13V
voltage to this pin to power on this chip.
FB 3
4 EN
VIN Connect a 10μF ceramic bypass
capacitor between VIN and GND to
SOT-23-6L
eliminate noise.
SW
Switch Output. Connect this pin to the
switch end of the inductor.
Enable Input. EN is a digital input that
turns the regulator on or off. Drive EN
EN high to turn on the regulator, drive it low
to turn it off. Pull up with 100kΩ resistor
for automatic startup.
ORDER/MARKING INFORMATION
Order Information
AX3821X X
Package Type
C: SOT-23-6L
Packing
Blank: Tube
A : Taping
Top Marking
RYYWX
AX3821
ID code:internal
WW:01~26 (A~Z)
27~52 (a~z)
Year: A=2010
1=2011
2=2012
:
:
9=2019
2/9
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.2 May.08, 2013


Part Number AX3821
Description 600KHz Synchronous Rectified Step-Down Converter
Maker AXElite
PDF Download

AX3821 Datasheet PDF






Similar Datasheet

1 AX3821 600KHz Synchronous Rectified Step-Down Converter
AXElite





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z



Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy