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LA8040 PDF даташит
| Спецификация LA8040 изготовлена «INNO-TECH» и имеет функцию, называемую «5V 2A Synchronous Step-Down Converter». |
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Детали детали
| Номер произв | LA8040 |
| Описание | 5V 2A Synchronous Step-Down Converter |
| Производители | INNO-TECH |
| логотип |  |
16 Pages
No Preview Available ! |
LA8040
1MHz, 5V/2A Synchronous Step-Down Converter
General Description
Features
The LA8040 is a current mode, synchronous
step-down DC-DC converter that is designed to
meet 2A output current, and utilizes PWM
control scheme that switches with 1MHz fixed
frequency.
The input voltage range of LA8040 is from 2.5V
to 6V, and available in adjustable output
voltage from 0.8V to VIN. The supply current is
only 0.6mA during operation and under 25uA in
shutdown.
This device provides an enable function that can
be controlled by external logic signal. It also
provides excellent regulation during line or load
transient due to the current mode operation.
Other features of soft-start, current limit,
thermal shutdown protection, short circuit
protection, and over voltage protection are also
included. The under voltage lockout prevents
low input voltage start-up until it reaches the
UVLO threshold voltage. It is available in the
Exposed Pad SOP-8 (ESOP) package.
l Continuous 2A Output Capability
l 0.8V Reference Voltage
l 2.5V to 6V Input Voltage Range
l Adjustable Output from 0.8V to VIN
l 1MHz Oscillation Frequency
l 0.6mA Low Supply Current
l 25uA Low Shutdown Current
l Internal Soft-Start & Current Limit
l Current Mode for Excellent Response
l Short Circuit Protection
l Thermal shutdown Protection
l Over Voltage Protection
l Under Voltage Lockout
l Available in ESOP-8 Package
l Meet RoHS Standard
Applications
l LCD TV / Monitor
l Set-Top-Box
l Portable & Storage Device
l Wireless & Broadband Communication
Ordering Information
LA8040 1 2 3 4
1 (Package Type) => J: SOP
2 (Number of Pins) => G: 8 pin
3 (Output Voltage) => Blank: Adjustable
4 (Special Feature) => Blank: N/A
Available Part Number
LA8040JG
Marking Information
1 2 (Date Code)
For date code rule, please contact our
sales representative directly.
3 4 (Internal Code)
Rev01
-1-
Mar. 07, 2013
www.inno.com.tw
Free Datasheet http://www.Datasheet4U.com
No Preview Available ! |
Typical Application
l VIN=5V, VOUT=1.2V
LA8040
* Optional Low-Pass Filter. It can reduce noise at VCC if needed.
** Optional Feed-forward Capacitor. A 0.1uF is recommended for improve the load transient response.
l Efficiency Curve
Rev01
-2-
Mar. 07, 2013
www.inno.com.tw
Free Datasheet http://www.Datasheet4U.com
No Preview Available ! |
LA8040
Quick Design Table
For 2A output current application, △IL = 0.2A, continuous current mode operation.
L1: Recommended Inductor
R1: Output Voltage Divider
R2: Output Voltage Divider
CBP: Recommended Decoupling Capacitor
VOUT
VIN
1.0V
1.1V
1.2V
1.5V
1.8V
2.5V
2.8V
3.0V
3.3V
Li-Ion Battery
L1 : 2.2uH
R1 : 6.8KOhm
R2 : 27Kohm
CBP : 0.1uF
L1 : 2.2uH
R1 : 10KOhm
R2 : 27KOhm
CBP : 0.1uF
L1 : 2.2uH
R1 : 15KOhm
R2 : 30KOhm
CBP : 0.1uF
L1 : 2.2uH
R1 : 13KOhm
R2 : 15KOhm
CBP : 0.1uF
L1 : 3.3uH
R1 : 15KOhm
R2 : 12KOhm
CBP : 0.1uF
L1 : 3.3uH
R1 : 10KOhm
R2 : 4.7KOhm
CBP : 1uF
L1 : 4.7uH
R1 : 13KOhm
R2 : 5.1KOhm
CBP : 1uF
L1 : 4.7uH
R1 : 13KOhm
R2 : 4.7KOhm
CBP : 1uF
3.3V
L1 : 2.2uH
R1 : 6.8KOhm
R2 : 27Kohm
CBP : 0.1uF
L1 : 2.2uH
R1 : 10KOhm
R2 : 27KOhm
CBP : 0.1uF
L1 : 2.2uH
R1 : 15KOhm
R2 : 30KOhm
CBP : 0.1uF
L1 : 2.2uH
R1 : 13KOhm
R2 : 15KOhm
CBP : 0.1uF
L1 : 3.3uH
R1 : 15KOhm
R2 : 12KOhm
CBP : 0.1uF
L1 : 4.7uH
R1 : 10KOhm
R2 : 4.7KOhm
CBP : 1uF
L1 : 4.7uH
R1 : 13KOhm
R2 : 5.1KOhm
CBP : 1uF
5V
L1 : 1uH
R1 : 6.8KOhm
R2 : 27Kohm
CBP : 0.1uF
L1 : 2.2uH
R1 : 10KOhm
R2 : 27KOhm
CBP : 0.1uF
L1 : 2.2uH
R1 : 15KOhm
R2 : 30KOhm
CBP : 0.1uF
L1 : 3.3uH
R1 : 13KOhm
R2 : 15KOhm
CBP : 0.1uF
L1 : 3.3uH
R1 : 15KOhm
R2 : 12KOhm
CBP : 0.1uF
L1 : 3.3uH
R1 : 10KOhm
R2 : 4.7KOhm
CBP : 0.1uF
L1 : 4.7uH
R1 : 13KOhm
R2 : 5.1KOhm
CBP : 0.1uF
L1 : 4.7uH
R1 : 13KOhm
R2 : 4.7KOhm
CBP : 1uF
L1 : 4.7uH
R1 : 16KOhm
R2 : 5.1KOhm
CBP : 1uF
Rev01
-3-
Mar. 07, 2013
www.inno.com.tw
Free Datasheet http://www.Datasheet4U.com
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