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PDF JM2430 Data sheet ( Hoja de datos )
| Número de pieza | JM2430 | |
| Descripción | 3A Synchronous Step-Down DC/DC | |
| Fabricantes | Compass Electronics | |
| Logotipo |  |
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JM2430
1.4MHz, 3A Synchronous Step-Down DC/DC
FEATURES
• High Efficiency: Up to 95%
• 1.4MHz Constant Frequency Operation
• 3A Output Current
• No Schottky Diode Required
• 2.4V to 5.5V Input Voltage Range
• Output Voltage as Low as 0.6V
• Low Quiescent Current: 40µA
• Slope Compensated Current Mode Control for
Excellent Line and Load Transient Response
• Inrush Current Limit and Soft Start
• <1µA Shutdown Current
• Available in ESOP-8 package
APPLICATIONS
• Cable/DSL Modems
• Computer Peripherals
• Network Cards
• High Efficiency Conversion from 5V or 3.3 Supply
• Set-Top Boxes
GENERAL DESCRIPTION
The JM2430 is a constant frequency, current mode
PWM step-down converter. The device integrates a
main switch and a synchronous rectifier for high
efficiency without an external Schottky diode. It is
ideal for powering portable equipment that runs from
a single cell Lithium-Ion (Li+) battery. The output
voltage can be regulated as low as 0.6V. The
JM2430 can also run at 100% duty cycle for low
dropout operation, extending battery life in portable
system. This device offers two operation modes,
PWM control and PFM Mode switching control,
which allows a high efficiency over the wider range of
the load.
Typical Application
Figure 1. Basic Application Circuit
Part Number
JM2430-ADJ
SWICHING
FREQUENCY
1.4MHz
Temp Range
-40°C to +85°C
OUTPUT
VOLTAGE (V)
ADJ
OUTPUT
CURRENT (A)
3
Compass Electronics Science & Technology Co.,Ltd
1
1 page  
VOUT
Vin=3.6V
Vout=1.8V
Iout=600mA
10mV/DIV
SW
5V/DIV
IL
1A/DIV
400ns/DIV
PWM MODE
Functional Block Diagram
Start up
Figure 2. JM2430 Block Diagram
Functional Description
The JM2430 is a high performance 3A
1.4MHz monolithic step-down converter.
The JM2430 requires only three external
power components (Cin, Cout and L). The
adjustable version can be programmed
with external feedback to any voltage,
ranging from 0.6V to the input voltage.
At dropout, the converter duty cycle
increases to 100% and the output voltage
tracks the input voltage minus the Rdson
drop of the high-side MOSFET.
The internal error amplifier and
compensation provides excellent transient
response, load, and line regulation. Soft
start function prevents input inrush current
and output overshoot during start up.
Compass Electronics Science & Technology Co.,Ltd
5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet JM2430.PDF ] | |
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