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LTC1435AIG#TR

Description
Switching Regulator LTC1435A - High Efficiency Low Noise Synchronous Step-Down Switching Regulator
CategoryPower/power management    The power supply circuit   
File Size353KB,20 Pages
ManufacturerADI
Websitehttps://www.analog.com
Download Datasheet Parametric Compare View All

LTC1435AIG#TR Overview

Switching Regulator LTC1435A - High Efficiency Low Noise Synchronous Step-Down Switching Regulator

LTC1435AIG#TR Parametric

Parameter NameAttribute value
Is it Rohs certified?incompatible
MakerADI
package instructionSSOP-16
Reach Compliance Codenot_compliant
ECCN codeEAR99
Analog Integrated Circuits - Other TypesSWITCHING CONTROLLER
control modeCURRENT-MODE
Control TechnologyPULSE WIDTH MODULATION
Maximum input voltage30 V
Minimum input voltage3.5 V
Nominal input voltage15 V
JESD-30 codeR-PDSO-G16
JESD-609 codee0
length6.2 mm
Number of functions1
Number of terminals16
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Maximum output current2 A
Maximum output voltage9 V
Minimum output voltage1.19 V
Package body materialPLASTIC/EPOXY
encapsulated codeSSOP
Encapsulate equivalent codeSSOP16,.3
Package shapeRECTANGULAR
Package formSMALL OUTLINE, SHRINK PITCH
Certification statusNot Qualified
Maximum seat height2 mm
surface mountYES
Switch configurationPUSH-PULL
Maximum switching frequency138 kHz
technologyCMOS
Temperature levelINDUSTRIAL
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formGULL WING
Terminal pitch0.65 mm
Terminal locationDUAL
width5.3 mm
LTC1435A
High Efficiency Low Noise
Synchronous Step-Down
Switching Regulator
FEATURES
s
s
s
s
DESCRIPTION
The LTC
®
1435A is a synchronous step-down switching
regulator controller that drives external N-channel power
MOSFETs using a fixed frequency architecture. A wide
duty cycle range of 5% to 99% allows high V
IN
to low V
OUT
DC/DC conversion, as well as low dropout operation that
extends operating time in battery-operated systems. Burst
Mode
TM
operation provides high efficiency at low load
currents.
The operating frequency is set by an external capacitor
allowing maximum flexibility in optimizing efficiency. A
secondary winding feedback control pin, SFB, guarantees
regulation regardless of load on the main output by
forcing continuous operation. Burst Mode operation is
inhibited when the SFB pin is pulled low, which reduces
noise and RF interference.
Soft start is provided by an external capacitor that can be
used to properly sequence supplies. The operating cur-
rent level is user-programmable via an external current
sense resistor. Wide input supply range allows operation
from 3.5V to 30V (36V maximum).
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode is a trademark of Linear Technology Corporation.
s
s
s
s
s
s
s
s
s
s
Dual N-Channel MOSFET Synchronous Drive
Programmable Fixed Frequency
Wide V
IN
Range: 3.5V to 36V Operation
Low Minimum On-Time (
300ns) for High
Frequency, Low Duty Cycle Applications
Very Low Dropout Operation: 99% Duty Cycle
Low Standby Current
Secondary Feedback Control
Programmable Soft Start
Remote Output Voltage Sense
Logic Controlled Micropower Shutdown: I
Q
< 25µA
Foldback Current Limiting (Optional)
Current Mode Operation for Excellent Line and Load
Transient Response
Output Voltages from 1.19V to 9V
Available in 16-Lead Narrow SO and SSOP Packages
APPLICATIONS
s
s
s
s
s
Notebook and Palmtop Computers, PDAs
Cellular Telephones and Wireless Modems
Portable Instruments
Battery-Operated Devices
DC Power Distribution Systems
TYPICAL APPLICATION
V
IN
4.5V TO 22V
C
OSC
43pF
C
OSC
C
SS
0.1µF
C
C
330pF
R
C
10k
SGND
100pF
V
OSENSE
SENSE
BG
PGND
SENSE
+
RUN/SS
I
TH
LTC1435A
INTV
CC
BOOST
V
IN
TG
SW
M1
Si4412DY
+
C
IN
22µF
35V
×
2
R
SENSE
0.033Ω
D
B
CMDSH-3
C
B
0.1µF
L1
4.7µH
+
4.7µF
M2
Si4412DY
D1
MBRS140T3
1000pF
Figure 1. High Efficiency Step-Down Converter
U
U
U
V
OUT
1.6V/3A
R1
35.7k
R2
102k
+
C
OUT
100µF
6.3V
×
2
1435A F01
1

LTC1435AIG#TR Related Products

LTC1435AIG#TR LTC1435ACG#TR
Description Switching Regulator LTC1435A - High Efficiency Low Noise Synchronous Step-Down Switching Regulator Switching Regulator LTC1435A - High Efficiency Low Noise Synchronous Step-Down Switching Regulator
Is it Rohs certified? incompatible incompatible
Maker ADI ADI
package instruction SSOP-16 SSOP-16
Reach Compliance Code not_compliant not_compliant
ECCN code EAR99 EAR99
Analog Integrated Circuits - Other Types SWITCHING CONTROLLER SWITCHING CONTROLLER
control mode CURRENT-MODE CURRENT-MODE
Control Technology PULSE WIDTH MODULATION PULSE WIDTH MODULATION
Maximum input voltage 30 V 30 V
Minimum input voltage 3.5 V 3.5 V
Nominal input voltage 15 V 15 V
JESD-30 code R-PDSO-G16 R-PDSO-G16
JESD-609 code e0 e0
length 6.2 mm 6.2 mm
Number of functions 1 1
Number of terminals 16 16
Maximum operating temperature 85 °C 70 °C
Maximum output current 2 A 2 A
Maximum output voltage 9 V 9 V
Minimum output voltage 1.19 V 1.19 V
Package body material PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code SSOP SSOP
Encapsulate equivalent code SSOP16,.3 SSOP16,.3
Package shape RECTANGULAR RECTANGULAR
Package form SMALL OUTLINE, SHRINK PITCH SMALL OUTLINE, SHRINK PITCH
Certification status Not Qualified Not Qualified
Maximum seat height 2 mm 2 mm
surface mount YES YES
Switch configuration PUSH-PULL PUSH-PULL
Maximum switching frequency 138 kHz 138 kHz
technology CMOS CMOS
Temperature level INDUSTRIAL COMMERCIAL
Terminal surface Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb)
Terminal form GULL WING GULL WING
Terminal pitch 0.65 mm 0.65 mm
Terminal location DUAL DUAL
width 5.3 mm 5.3 mm
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