LTC3423EMS#TR Linear Technology, LTC3423EMS#TR Datasheet

IC SYNC BOOST CONV MCRPWR 10MSOP

LTC3423EMS#TR

Manufacturer Part Number
LTC3423EMS#TR
Description
IC SYNC BOOST CONV MCRPWR 10MSOP
Manufacturer
Linear Technology
Type
Step-Up (Boost)r
Datasheet

Specifications of LTC3423EMS#TR

Internal Switch(s)
Yes
Synchronous Rectifier
Yes
Number Of Outputs
1
Voltage - Output
1.5 ~ 5.5 V
Current - Output
1A
Frequency - Switching
3MHz
Voltage - Input
0.5 ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
10-MSOP, Micro10™, 10-uMAX, 10-uSOP
Power - Output
750mW
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
LTC3423EMSTR

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LTC3423EMS#TRLTC3423EMS
Manufacturer:
LT
Quantity:
10 000
Company:
Part Number:
LTC3423EMS#TRLTC3423EMS#PBF
Manufacturer:
LT
Quantity:
45
FEATURES
TYPICAL APPLICATIO
APPLICATIO S
Burst Mode and OPTI-LOOP are registered trademarks of Linear Technology Corporation.
2.2 F
V
DD
C1
, LTC and LT are registered trademarks of Linear Technology Corporation.
1.5V to 5.5V Adjustable Output Voltage
Synchronous Rectification: Up to 95% Efficiency
1A Switch Current (LTC3423) or
2A Switch Current (LTC3424)
Fixed Frequency Operation Up to 3MHz
Wide Input Range: 0.5V to 5.5V (Operating)
Very Low Quiescent Current: 38 A (Burst Mode
Operation)
No External Schottky Diode Required
Synchronizable Switching Frequency
Burst Mode Enable Control
OPTI-LOOP
Very Low Shutdown Current: < 1 A
Small 10-Pin MSOP Package
Pagers
Handheld Instruments
Cordless Phones
Wireless Handsets
GPS Receivers
Battery Backup
V
+
DD
V
IN
10 F
= 2.7V TO 5.5V
1 = Burst Mode OPERATION
1-Cell to 1.8V at 600mA Step-Up Converter
= 0.9V TO 1.5V
1
CELL
C2
0 = FIXED FREQ
®
Compensation
10
U
6
3
2
1
R
30.1k
t
V
SHDN
V
MODE/SYNC
R
DD
IN
t
LTC3424
2.2 H
L1
C1: TAIYO YUDEN JMK212BJ225MG
C2: TAIYO YUDEN JMK212BJ106MM
C3: TAIYO YUDEN JMK325BJ226MM
L1: SUMIDA CD43-2R2M
V
GND
OUT
SW
V
FB
C
4
7
8
9
5
U
RC
82k
C4
470pF
C5
4.7pF
R2
249k
R1
110k
3423/24 TA01
V
1.8V
600mA
C3
44 F
(2 22 F)
®
OUT
3MHz Micropower Synchronous
DESCRIPTIO
The LTC
frequency, step-up DC/DC converters that can regulate
output voltages as low as 1.5V from a single cell. An
applied voltage of at least 2.7V to the V
to power the internal control circuitry.
The devices include a 0.16 N-channel MOSFET switch
and a 0.21 P-channel synchronous rectifier. The LTC3423
is intended for applications requiring less than 0.75W of
output power and the LTC3424 for 1.5W or less. Switching
frequencies up to 3MHz are programmed with an external
timing resistor and the oscillator can be synchronized to
an external clock.
Quiescent current is only 38 A in Burst Mode operation,
maximizing battery life in portable applications. Burst
Mode operation is user controlled and can be enabled by
driving the MODE/SYNC pin high. If the MODE/SYNC pin
has either a clock or is driven low then the operation is at
constant fixed frequency.
Other features include a 1 A shutdown, thermal shutdown
and current limit. The LTC3423 and LTC3424 are available
in the 10-lead MSOP package. For applications requiring
an output voltage greater than 2.6V, the LTC3401 and
LTC3402 are recommended without the need of a separate
voltage for the V
®
3423 and LTC3424 are high efficiency, fixed
100
90
80
70
60
50
40
30
20
10
0
0.1
Low Output Voltage,
DD
U
OPERATION
Burst Mode
pin.
1
OUTPUT CURRENT (mA)
Boost Converters
LTC3423/LTC3424
Efficiency
V
V
WITH MBRM120T3 SCHOTTKY
DD
OUT
V
= 3.3V
IN
= 1.8V
10
= 1.5V
V
IN
= 1.2V
V
100
IN
= 0.9V
3223/24 TA02
1000
DD
pin is required
34234f
1

Related parts for LTC3423EMS#TR

LTC3423EMS#TR Summary of contents

Page 1

... Small 10-Pin MSOP Package U APPLICATIO S Pagers Handheld Instruments Cordless Phones Wireless Handsets GPS Receivers Battery Backup , LTC and LT are registered trademarks of Linear Technology Corporation. Burst Mode and OPTI-LOOP are registered trademarks of Linear Technology Corporation. U TYPICAL APPLICATIO 1-Cell to 1.8V at 600mA Step-Up Converter V = 2. ...

Page 2

LTC3423/LTC3424 ABSOLUTE AXI U RATI GS (Note Voltages .............................. – 0. OUT DD SW Voltage ................................................. – 0. Voltages ......................... – 0.5V to ...

Page 3

ELECTRICAL CHARACTERISTICS The denotes specifications that apply over the full operating temperature range, otherwise specifications are 1.2V 3.3V unless otherwise noted. IN OUT PARAMETER SHDN Input High SHDN Input Low SHDN Input Current Note ...

Page 4

LTC3423/LTC3424 W U TYPICAL PERFOR A CE CHARACTERISTICS Converter Efficiency 1.2V to 1.8V 100 300MHz 90 Burst Mode 80 OPERATION 3MHz 70 60 1MHz WITH MBRM120T3 SCHOTTKY 0 0 100 1000 OUTPUT CURRENT ...

Page 5

W U TYPICAL PERFOR A CE CHARACTERISTICS Shutdown Threshold 1.10 1.05 1.00 0.95 0.90 0.85 0.80 0.75 0.70 0.65 0.60 –55 –15 25 TEMPERATURE ( CTIO S R (Pin 1): Timing Resistor to Program ...

Page 6

LTC3423/LTC3424 W BLOCK DIAGRA ANTICROSS SHDN SHUTDOWN 10 CONDITION GND 2.7V TO 5.5V SYNC OSC 0.3 OUT OPTIONAL ...

Page 7

U U APPLICATIO S I FOR ATIO DETAILED DESCRIPTION The LTC3423/LTC3424 provides high efficiency, low noise power for applications such as portable instrumentation and are ideal for applications that require an output voltage between 1.5V and 2.6V from a single ...

Page 8

LTC3423/LTC3424 U U APPLICATIO S I FOR ATIO The inductor current ripple is typically set to 20% to 40% of the maximum inductor current. For high efficiency, choose an inductor with a high fre- quency core material, such as ferrite, ...

Page 9

U U APPLICATIO S I FOR ATIO Operating Frequency Selection There are several considerations in selecting the operat- ing frequency of the converter. The first is determining the sensitive frequency bands that cannot tolerate any spec- tral noise. For example, ...

Page 10

LTC3423/LTC3424 U U APPLICATIO S I FOR ATIO • CONTROLOUTPUT EA 2 • 2000 CONTROL EA I OUT The output filter pole is given by: I OUT f Hz FILTERPOLE ...

Page 11

... LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...

Page 12

... Single Cell, High Current (1A) Micropower, Synchronous 3MHz Step-Up DC/DC Converter LTC3402 Single Cell, High Current (2A) Micropower, Synchronous 3MHz Step-Up DC/DC Converter ThinSOT is a trademark of Linear Technology Corporation. Linear Technology Corporation 12 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 www.linear.com ...

Related keywords