JM2430 PDF даташит
Спецификация JM2430 изготовлена «Compass Electronics» и имеет функцию, называемую «3A Synchronous Step-Down DC/DC». |
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Детали детали
Номер произв | JM2430 |
Описание | 3A Synchronous Step-Down DC/DC |
Производители | Compass Electronics |
логотип |
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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
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Pin Description
PIN NAME
FUNCTION
1,6,8
2
3
4
5
7
N/C
Vin
SW
GND
FB
EN
EP
Power Supply Input. Must be closely decoupled to GND with a 22µF
or greater ceramic capacitor.
Power Switch Output. It is the switch node connection to Inductor.
This pin connects to the drains of the internal P-ch and N-ch MOSFET
switches.
Ground pin
Output Voltage Feedback Pin. An internal resistive divider divides the
output voltage down for comparison to the internal reference voltage.
Chip Enable Pin. Drive EN above 1.5V to turn on the part. Drive EN
below 0.4V to turn it off. Do not leave EN floating.
Power Ground exposed pad, Must be connected to bare copper
ground plane
Package Information
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Absolute Maximum Ratings
Input Supply Voltage …… -0.3V to 6V
EN,FB Voltages….…-0.3 to (Vin+0.3V)
SW Voltage ………-0.3V to (Vin+0.3V)
Operating Temperature Range … -40°C to +85°C
Lead Temperature(Soldering,10s) ….…..+300°C
Storage Temperature Range ..…-65°C to 150°C
Electrical Characteristics
(VIN=VEN=3.6V, VOUT=1.8V, TA = 25°C, unless otherwise noted.)
Parameter
Conditions
MIN
Input Voltage Range
2.4
UVLO Threshold
1.7
Input DC Supply Current
PWM Mode
PFM Mode
Shutdown Mode
Regulated Feedback
Voltage
Reference Voltage Line
Regulation
Output Voltage Line
Regulation
Output Voltage Load
Regulation
Vout = 90%, Iload=0mA
Vout = 105%, Iload=0mA
VRUN = 0V, VIN=4.2V
TA = 25°C
Vin= 2.7V to 5.5V
VIN = 2.7V to 5.5V
0.582
Oscillation Frequency
Vout=100%
Vout=0V
On Resistance of PMOS
ON Resistance of NMOS
Peak Current Limit
RUN Threshold
RUN Leakage Current
SW Leakage Current
ISW=100mA
ISW=-100mA
VIN= 3V, Vout=90%
VRUN=0V,VIN=Vsw=3.6V
0.40
TYP
1.8
160
40
0.1
MAX
5.5
1.9
240
70
1.0
unit
V
V
µA
µA
µA
µA
0.600 0.618 V
0.04 0.40 %/V
0.04 0.4 %
0.5 %
1.4 MHz
300
0.10
0.09
4
1.0
±0.01
±0.01
0.15
0.15
1.50
±0.1
±1.0
KHz
Ω
Ω
A
V
µA
µA
Compass Electronics Science & Technology Co.,Ltd
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Номер в каталоге | Описание | Производители |
JM2430 | 3A Synchronous Step-Down DC/DC | Compass Electronics |
JM2430-ADJ | 3A Synchronous Step-Down DC/DC | Compass Electronics |
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