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LT1534-1

Description
2 A SWITCHING REGULATOR, 250 kHz SWITCHING FREQ-MAX, PDSO16
Categorysemiconductor    Analog mixed-signal IC   
File Size227KB,16 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Download Datasheet Parametric Compare View All

LT1534-1 Overview

2 A SWITCHING REGULATOR, 250 kHz SWITCHING FREQ-MAX, PDSO16

LT1534-1 Parametric

Parameter NameAttribute value
Number of functions1
Number of terminals16
Rated input voltage5 V
Maximum limit input voltage23 V
Minimum limit input voltage2.7 V
Maximum operating temperature125 Cel
Minimum operating temperature0.0 Cel
Processing package description0.150 INCH, PLASTIC, SOP-16
stateACTIVE
packaging shapeRECTANGULAR
Package SizeSMALL OUTLINE
surface mountYes
Terminal formGULL WING
Terminal spacing1.27 mm
terminal coatingTIN LEAD
Terminal locationDUAL
Packaging MaterialsPLASTIC/EPOXY
Temperature levelOTHER
control modePEAK CURRENT
Control TechnologyPULSE WIDTH MODULATION
Maximum output current2 A
Analog IC other typesSWITCHING REGULATOR
Switch configurationBOOST
Maximum switching frequency250 kHz
LT1534/LT1534-1
Ultralow Noise
2A Switching Regulators
FEATURES
s
s
s
DESCRIPTIO
s
s
s
s
s
s
s
Greatly Reduced Conducted and Radiated EMI
Low Switching Harmonic Content
Independent Control of Switch Voltage and
Current Slew Rates
2A Current Limited Power Switch
Regulates Positive and Negative Voltages
20kHz to 250kHz Oscillator Frequency
Easily Synchronized to External Clock
Wide Input Voltage Range: 2.7V to 23V
Low Shutdown Current: 12µA Typical
Easier Layout than with Conventional Switchers
APPLICATIO S
s
s
s
s
s
Precision Instrumentation Systems
Isolated Supplies for Industrial Automation
Medical Instruments
Wireless Communications
Single Board Data Acquisition Systems
The LT
®
1534/LT1534-1 are a new class of switching regula-
tor designed to reduce conducted and radiated electromag-
netic interference (EMI). Ultralow noise and EMI are achieved
by providing user control of the output switch slew rates.
Voltage and current slew rates can be independently pro-
grammed to optimize switcher harmonic content versus
efficiency. The LT1534/LT1534-1 can reduce high frequency
harmonic power by as much as 40dB with only minor losses
in efficiency.
The LT1534/LT1534-1 utilize a current mode architecture
optimized for low noise boost topologies. The ICs include a
2A power switch along with all necessary oscillator, control
and protection circuitry. Unique error amp circuitry can
regulate both positive and negative voltages. The internal
oscillator may be synchronized to an external clock for more
accurate placement of switching harmonics. Protection fea-
tures include cycle-by-cycle current limit protection, under-
voltage lockout and thermal shutdown.
Low minimum supply voltage and low supply current during
shutdown make the LT1534/LT1534-1 well suited for por-
table applications. The LT1534/LT1534-1 are available in the
16-pin narrow SO package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATION
3.3V
L1
50µH
1N5817
A
L3
50µH
C1
47µF
6.3V
×2
B
+
C
IN
33µF
6.3V
15
12
4
SHDN
SYNC
PGND
LT1534-1
R
VSL
R
T
R
CSL
11
V
C
GND
1,8,
9,16
NFB
FB
3
14
13
7
2.49k
24k
24k
V
IN
COL
2
10Ω
+
L2
1nF
+
OPTIONAL
5V
650mA
C2
47µF
3300pF
5
16.9k 6
C
T
A
50mV/DIV
7.5k
1534 TA01
220pF
6.8k
15nF
10
C
IN
: MATSUSHITA ECGCOJB330
C1, C2: MATSUSHITA ECGCOJB47O
L1, L3: COILTRONICS CTX50-4
L2: COILCRAFT B08T (28nH) OR PC TRACE
B
2mV/DIV
Figure 1. Low Noise 3.3V to 5V Boost Converter
U
5V Output Noise (BW = 100MHz)
10µs/DIV
1534 TA02
U
U
1

LT1534-1 Related Products

LT1534-1 LT1534IS-1 LT1534IS LT1534I LT1534CS-1 LT1534CS LT1534C LT1534
Description 2 A SWITCHING REGULATOR, 250 kHz SWITCHING FREQ-MAX, PDSO16 2 A SWITCHING REGULATOR, 250 kHz SWITCHING FREQ-MAX, PDSO16 2 A SWITCHING REGULATOR, 250 kHz SWITCHING FREQ-MAX, PDSO16 2 A SWITCHING REGULATOR, 250 kHz SWITCHING FREQ-MAX, PDSO16 2 A SWITCHING REGULATOR, 250 kHz SWITCHING FREQ-MAX, PDSO16 2 A SWITCHING REGULATOR, 250 kHz SWITCHING FREQ-MAX, PDSO16 2 A SWITCHING REGULATOR, 250 kHz SWITCHING FREQ-MAX, PDSO16 2 A SWITCHING REGULATOR, 250 kHz SWITCHING FREQ-MAX, PDSO16
Number of functions 1 1 1 1 1 1 1 1
Number of terminals 16 16 16 16 16 16 16 16
Maximum operating temperature 125 Cel 125 °C 125 °C 125 Cel 125 °C 125 °C 125 Cel 125 Cel
Minimum operating temperature 0.0 Cel -40 °C -40 °C 0.0 Cel - - 0.0 Cel 0.0 Cel
surface mount Yes YES YES Yes YES YES Yes Yes
Terminal form GULL WING GULL WING GULL WING GULL WING GULL WING GULL WING GULL WING GULL WING
Terminal location DUAL DUAL DUAL DUAL DUAL DUAL DUAL DUAL
Temperature level OTHER AUTOMOTIVE AUTOMOTIVE OTHER OTHER OTHER OTHER OTHER
control mode PEAK CURRENT CURRENT-MODE CURRENT-MODE PEAK CURRENT CURRENT-MODE CURRENT-MODE PEAK CURRENT PEAK CURRENT
Control Technology PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION
Maximum output current 2 A 2 A 2 A 2 A 2 A 2 A 2 A 2 A
Switch configuration BOOST BOOST BOOST BOOST BOOST BOOST BOOST BOOST
Maximum switching frequency 250 kHz 250 kHz 250 kHz 250 kHz 250 kHz 250 kHz 250 kHz 250 kHz
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