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AX3123 Datasheet Preview

AX3123 Datasheet

1.4MHz Asynchronous Step-Down DC/DC Converter

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AX3123
23V, 1.8A, 1.4MHz Asynchronous Step-Down
DC/DC Converter
GENERAL DESCRIPTION
The AX3123 is a monolithic step-down switch mode converter with a built-in power
MOSFET. It achieves 1.8A output current over a wide input supply range with excellent
load and line regulation. Current mode operation provides fast transient response and
eases loop stabilization. Fault condition protection includes cycle-by-cycle current limit
and over temperature protection.
The AX3123 requires a minimum number of available standard external components.
The AX3123 is available in SOT-23-6L, TSOT-23-6L packages.
FEATURES
- 1.8A Output Current
- 180mΩ Internal Power MOSFET Switch
- Stable with Low ESR Output Ceramic Capacitors
- Up to 92% Efficiency
- Fixed 1.4MHz Frequency
- Current Mode Operation
- Over-Temperature Protection with Hiccup-Mode
- Cycle-by-Cycle Over Current Protection
- Wide 4.5V to 23V Operating Input Range
- Output Adjustable from 0.805V to 15V
- 10μA Shutdown Current
- Miniature Packages: SOT-23-6L and TSOT-23-6L
1/13
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.0 Apr.17, 2012




AXElite

AX3123 Datasheet Preview

AX3123 Datasheet

1.4MHz Asynchronous Step-Down DC/DC Converter

No Preview Available !

AX3123
BLOCK DIAGRAM
VIN
EN
950K
UVLO
&
POR
ISEN
Error
FB Amplifier
0.805V
CCOMP
RCOMP
Internal
Regulator
VCC
OVP
OTP
Oscillator
Current
Comparator
S
R
OVP
OTP
UVLO
PWM
Control
Current
Limit
VCC
BS
Driver
Logic
High-Side
MOSFET
SW
GND
2/13
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.0 Apr.17, 2012


Part Number AX3123
Description 1.4MHz Asynchronous Step-Down DC/DC Converter
Maker AXElite
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AX3123 Datasheet PDF






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