LX1910CDU MICROSEMI [Microsemi Corporation], LX1910CDU Datasheet

no-image

LX1910CDU

Manufacturer Part Number
LX1910CDU
Description
Step-Down Regulator
Manufacturer
MICROSEMI [Microsemi Corporation]
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LX1910CDU
Manufacturer:
MSC
Quantity:
20 000
Copyright © 2004
Rev. 1.1, 2005-02-25
achieves very high efficiencies over a
broad
conditions. The LX1910 implements
a load-detection architecture and
enters a power-saving PFM mode
when driving small load currents
ensuring optimal regulator efficiency
over the entire output current range
thus maximizing battery life.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
V
implements a fixed frequency of
1MHz (typ), the transconductance
error amplifier has 12µA of drive
with an output voltage swing rail to
rail. Compensation is external for
maximum user flexibility.
IN
The LX1910 PWM buck regulator
The
C
IN
TM
range
PWM
C
R
C
C
of
LX1910
operating
PVIN
AVIN
SHDN
COMP
AGND
operating
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Figure 1 – LX1910 Circuit Topology and Typical Efficiency Performance
Note: Available in Tape & Reel. Append the letters “TR” to the part number.
PGND
D E S C R I P T I O N
0 to 85
T
SW
J
FB
mode
(°C)
(i.e. LX1910-13016CDU-TR)
load
D
minimum load current for stable
operation. There is no Under Voltage
Lockout
operational range includes 4V to 6V.
The regulator is capable of providing
an output dc load current of 850mA.
The SHDN pin places the device in a
sleep-mode drawing less than 1µA of
quiescent current.
MSOP package allowing a complete
application circuit to occupy a very
small PCB area. These features make
the
SmartPhones, PDAs, or other battery-
operated devices
The LX1910 comes in space-saving
The LX1910 does not require a
C
4.5V – 6.0V
X
P R O D U C T H I G H L I G H T
Voltage
L
Input
Integrated Products Division
LX1910
PACKAGE ORDER INFO
R
R
1
2
®
Microsemi
for
the
ideal
Voltage Range
C
1.17V to V
OUT
input
Output
V
for
OUT
use
voltage,
IN
90%
80%
70%
60%
50%
40%
30%
20%
10%
Step-Down Regulator
P
RODUCTION
in
0
DU
RoHS Compliant / Pb-free
LX1910CDU
100
LX1910 Efficiency @ Vout=1.5V
Plastic MSOP
8-PIN
APPLICATIONS/BENEFITS
200
OUTPUT CURRENT, mA
D
Internal Reference 1.17V
±2% Accuracy (Line and
Temperature)
4V to 6.0V Input Range
Adj. Output From 1.17V to V
Output Current (I
Quiescent Current < 300µA
1MHz Operation Frequency
MSOP 8-Pin
Portable Microprocessor Core
Voltage Supplies
5V to 3V
ATA
K E Y F E A T U R E S
300
S
HEET
400
500
DC
>850mA)
LX1910
600
700
IN
Page 1

Related parts for LX1910CDU

LX1910CDU Summary of contents

Page 1

... Adj. Output From 1.17V to V Output Current (I >850mA) DC Quiescent Current < 300µA 1MHz Operation Frequency MSOP 8-Pin APPLICATIONS/BENEFITS Portable Microprocessor Core Voltage Supplies LX1910 Efficiency @ Vout=1.5V 0 100 200 300 400 500 600 OUTPUT CURRENT, mA Plastic MSOP DU 8-PIN RoHS Compliant / Pb-free LX1910CDU IN 700 Page 1 ...

Page 2

Input Voltage (IN) or SHDN to GND .............................................................................-0. GND.............................................................................................................-0. ...

Page 3

TM Specifications apply over junction temperature of: 0 Parameter Symbol Operating Range Output Voltage Range Feed Back Threshold FB Input Current EA Drive Current (COMP Pin) EA Output Swing (COMP Pin) Quiescent Operating Current Sleep (Shutdown Mode) Current IQVINSD Shutdown ...

Page 4

TM Ramp avin COMP 5.0V 4.7µF 30KΩ 3300pF Copyright © 2004 Rev. 1.1, 2005-02-25 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 ® Step-Down Regulator P RODUCTION ...

Page 5

UNCTIONAL ESCRIPTION The LX1910 implements a PFM / PWM architecture that improves power management efficiency across the output load range UTPUT OLTAGE ROGRAMMING Resistors R1 and R2 program the output voltage. An optional capacitor ...

Page 6

TM LX1910 LOAD REGULATION (Vout=1.5V) 0.15% 0.10% 0.05% 0.00% -0.05% -0.10% -0.15% -0.20% -0.25% -0.30% -0.35% 0 100 200 300 IOUT, ma Figure 4 1910 LINE REG (Vout=1.5V, Rload=15 ohms) 1.55 1.45 1.35 Vo 1.25 Vout Error 1.15 1.05 0.95 ...

Page 7

TM Figure 9– Output Load Step Response: CH1 Condition 5.0V; I OUT IN STEP Figure 11 – Switching Waveforms: PWM Mode CH3: V (pin 8) and CH1 OUT Copyright © 2004 ...

Page 8

TM DU 8-Pin Miniature Shrink Outline Package (MSOP Note: Dimensions do not include mold flash or protrusions; these shall not exceed 0.155mm(0.006”) on any side. Lead dimension shall not include solder coverage. PRODUCTION ...

Related keywords