CLS62-220NC Microsemi Corporation, CLS62-220NC Datasheet

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CLS62-220NC

Manufacturer Part Number
CLS62-220NC
Description
CLS62-220NC1.0MHz Inverting DC/DC Converter
Manufacturer
Microsemi Corporation
Datasheet
Copyright © 2002
Rev. 3.0a, 2005-03-14
DC/DC current-mode controller. With
a 750mA integrated switch, the
LX1734 can generate large output
currents in a small footprint.
LX1734 minimizes external com-
ponent size and cost by implementing
a
1.0MHz, while generating -5V at
250mA.
inductor inverting topology very low
output voltage ripple approaching
1mV
conjunction
capacitors. The dual inductor can be
implemented as a coupled or separate
cores.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
查询CD43-470供应商
The LX1734 is an inverting
When configured in the dual
high
P-P
TM
can be achieved when used in
switching
with
Note: L1A and L1B are shown as coupled. Individual inductors can also be used.
V
IN
= 5V
C1, C2, C3 are ceramic capacitors
ceramic
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
frequency
10µF
C1
D E S C R I P T I O N
output
The
of
clean output free from low frequency
noise typically present with charge pump
solutions. The low impedance output
remains within 1% of nominal during
large load steps. The 18V switch allows
high voltage outputs to be generated.
saving
package, which has the same footprint
and lead spacing as the SOT-23A.
complete inverter function utilizes less
than 0.3
SD
Note: Available in Tape & Reel. Append the letters “TR” to the
part number. (i.e. LX1734CLM-TR)
V
Fixed frequency operation ensures a
The LX1734 is available in the space
IN
LX1734
P R O D U C T H I G H L I G H T
22µH
GND
Microsemi Integrated Products
L1A
T
0 to 85
2
PACKAGE ORDER INFO
A
6-lead
inches of PCB space.
(°C)
®
SW
NFB
Microsemi
Figure 1
1µF
C2
3x3
LM
RoHS Compliant / Pb-free
Jedec
10k
R2
1.0MHz Inverting DC/DC Converter
Transition DC: 0452
LX1734CLM
Plastic MLPL
6-Pin
1000pF
MO-229
29.4k
R1
C4
22µH
L1B
A
22µF
Fixed Frequency 1.0MHz
Very Low Noise: 1mV
Stable Operation With Ceramic or
-5V at 250mA from 5V Input
Uses Small Surface Mount L/C
Wide Input Range: 4.2V to 8V
Low VCESAT Switch: 600mV at
6-Lead 3x3mm JEDEC MLPM
Functionally Compatible with
Disk Drive MR Head Bias
Digital Camera CCD Bias
LCD Bias
GaAs FET Bias
Local -5V or -12V Supplies
Operation
Ripple Possible With Cuk
Topology
Tantalum Capacitors
Components
600mA
Package
LT1611 or LT1931
APPLICATIONS/BENEFITS
C3
V
@ 150mA
K E Y F E A T U R E S
OUT
= -5V
P-P
LX1734
Output
Page 1

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CLS62-220NC Summary of contents

Page 1

The LX1734 is an inverting DC/DC current-mode controller. With a 750mA integrated switch, the LX1734 can generate large output currents in a small footprint. LX1734 minimizes external ...

Page 2

Supply Voltage (V ), Shutdown ( IN SW Voltage....................................................................................... -0.4V to 20V NFB Voltage .................................................................................................... -2V Current ...

Page 3

TM Unless otherwise specified, the following specifications apply over the operating ambient temperature 0°C test conditions Parameter Minimum Operating Voltage V Under Voltage Lockout IN Reference Voltage Reference Voltage Line Regulation NFB Pin Bias Current Quiescent ...

Page 4

TM CONDITIONS: V STEP LOAD RESPONSE 0 – 100mA VOUT ISTEP LOAD POWER ON RESPONSE, IOUT @ 200mA VOUT VIN Inductor, 2A/div -4.84 -4.88 -4.92 -4.96 -5 -5.04 -5.08 -5.12 -5.16 -5.2 - TEMP, °C Copyright © 2002 ...

Page 5

... D1 Diode, 0.5A, 30V UPS530 L1 Inductor, Coupled, CLS62-220NC 22uH Table 1 - Part List for Figure 1 (All Parts Are Surface Mount). Separate inductors (not on a common core) can be used in place of the coupled inductor (L1) of Figure 1. In this case the only component that changes in the parts list is L1, which now would be two separate inductors (L1, formerly L1A, and L2, formerly L1B) ...

Page 6

... Microsemi UPS530 (30V @ 0.5A) or Microsemi UPS5817 (20V @ 1A) are good choices. Layout Considerations Part Comments In operation, current is transferred between the LX1734 and D1 so 22µH CLS62-22022 to minimize ground noise it is recommended that the D1 cathode be Coupled connected directly to the ground pin pad for the LX1734 (refer to CD43-470 47µH 22µH, 2mm figure 1) ...

Page 7

TM LM 6-Pin Plastic Exposed Pad JEDEC MO-229 Reference D E TOP VIEW θ A2 SIDE VIEW BOTTOM VIEW Copyright © 2002 Rev. 3.0a, 2005-03-14 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 ...

Page 8

TM PRODUCTION DATA – Information contained in this document is proprietary to Microsemi and is current as of publication date. This document may not be modified in any way without the express written consent of Microsemi. Product processing does not ...

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