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LTC1433IGN

Description
Conv DC-DC 3V to 13.5V Step Down Single-Out 1.178V to 1.202V/3.3V/5V 0.45A 16-Pin SSOP N
CategoryPower/power management    The power supply circuit   
File Size292KB,20 Pages
ManufacturerADI
Websitehttps://www.analog.com
Download Datasheet Parametric Compare View All

LTC1433IGN Overview

Conv DC-DC 3V to 13.5V Step Down Single-Out 1.178V to 1.202V/3.3V/5V 0.45A 16-Pin SSOP N

LTC1433IGN Parametric

Parameter NameAttribute value
Is it Rohs certified?incompatible
MakerADI
package instructionSSOP,
Reach Compliance Codenot_compliant
ECCN codeEAR99
Other featuresALSO OPERATES AT 5V
Analog Integrated Circuits - Other TypesSWITCHING REGULATOR
control modeCURRENT-MODE
Control TechnologyPULSE WIDTH MODULATION
Maximum input voltage13 V
Minimum input voltage3.6 V
Nominal input voltage10 V
JESD-30 codeR-PDSO-G16
JESD-609 codee0
length4.9 mm
Humidity sensitivity level1
Number of functions1
Number of terminals16
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Maximum output current1.2 A
Nominal output voltage3.3 V
Package body materialPLASTIC/EPOXY
encapsulated codeSSOP
Package shapeRECTANGULAR
Package formSMALL OUTLINE, SHRINK PITCH
Peak Reflow Temperature (Celsius)235
Certification statusNot Qualified
Maximum seat height1.75 mm
surface mountYES
Switch configurationBUCK
Maximum switching frequency142 kHz
technologyCMOS
Temperature levelINDUSTRIAL
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formGULL WING
Terminal pitch0.635 mm
Terminal locationDUAL
Maximum time at peak reflow temperature20
width3.9116 mm
LTC1433/LTC1434
450mA, Low Noise
Current Mode Step-Down
DC/DC Converters
DESCRIPTION
The LTC
®
1433/LTC1434 are monolithic pulse width modu-
lated step-down DC/DC converters. By utilizing current
mode switching techniques, they provide excellent AC and
DC load and line regulation. Both devices operate at a fixed
frequency with the LTC1434 phase-lockable to an external
clock signal.
Both devices incorporate two internal P-channel power
MOSFETs with a parallel combined resistance of 0.6Ω (at
a supply of 10V). The Adaptive Power output stage selec-
tively drives one or both of the switches at frequencies up
to 700kHz to reduce switching losses and maintain high
efficiencies at low output currents.
The LTC1433/LTC1434 are capable of supplying up to
450mA of output current and boasts a
±2.4%
output
voltage accuracy. An internal low-battery detector has the
same level of accuracy as the output voltage. A power-on
reset timer (POR) is included which generates a signal
delayed by 65536/f
CLK
(300ms typ) after the output is
within 5% of the regulated output voltage.
Ideal for current sensitive applications, the devices draw
only 470µA of quiescent current. In shutdown the devices
draw a mere 15µA. To further maximize the life of the
battery source, the internal P-channel MOSFET switch is
turned on continuously in dropout.
FEATURES
s
s
s
s
s
s
s
s
s
s
s
s
High Efficiency: Up to 93%
Constant Frequency Adaptive Power
TM
Operation
Input Voltage Range: 3V to 13.5V
Internal 0.6Ω Power Switch (V
IN
= 10V)
Low Dropout Operation: 100% Duty Cycle
Low-Battery Detector
Internal Power-On Reset Timer
Current Mode Operation for Excellent Line and Load
Transient Response
Low Quiescent Current: 470µA
Shutdown Mode Draws Only 15µA Supply Current
±1%
Reference Accuracy
Available in 16- and 20-Lead Narrow SSOP
APPLICATIONS
s
s
s
s
s
s
s
Cellular Telephones
Portable Instruments
Wireless Modems
RF Communications
Distributed Power Systems
Scanners
Battery-Powered Equipment
, LTC and LT are registered trademarks of Linear Technology Corporation.
Adaptive Power is a trademark of Linear Technology Corporation.
TYPICAL APPLICATION
0.1µF
D1
L1
100µH
1
2
3
4
5
6
0.1µF
7
8
SSW
NC
BSW
NC
LTC1433
68µF**
20V
100
16
PWRV
IN
PGND 15
SV
IN
C
OSC
POR
I
TH
V
OSENSE
V
PROG
14
13
12
11
10
9
6800pF
D1: MOTOROLA MBRS130LT3 *AVX TPSD107M010R0100
** AVX TPSE686M020R0150
L1: COILCRAFT D03316-104
1433/34 F01
V
IN
3.5V TO 12V
90
+
100µF*
10V
EFFICIENCY (%)
V
OUT
3.3V
10k
80
70
V
IN
= 9V
60
50
40
0.001
SGND
RUN/SS
LBO
LBI
POWER-ON
RESET
5.1k
680pF
47pF
Figure 1. High Efficiency Step-Down Converter
U
U
U
LTC1433 Efficiency for
V
OUT
= 3.3V
V
IN
= 5V
V
IN
= 12V
+
0.01
0.1
LOAD CURRENT (A)
1
1433/34 TA01
1

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Description Conv DC-DC 3V to 13.5V Step Down Single-Out 1.178V to 1.202V/3.3V/5V 0.45A 16-Pin SSOP N Conv DC-DC 3V to 13.5V Step Down Single-Out 1.178V to 1.202V/3.3V/5V 0.45A 16-Pin SSOP N Tube Conv DC-DC 3V to 13.5V Step Down Single-Out 1.178V to 1.202V/3.3V/5V 0.45A 16-Pin SSOP N T/R Conv DC-DC 3V to 13.5V Step Down Single-Out 1.178V to 1.202V/3.3V/5V 0.45A 20-Pin SSOP N Tube Conv DC-DC 3V to 13.5V Step Down Single-Out 1.178V to 1.202V/3.3V/5V 0.45A 20-Pin SSOP N T/R
Is it Rohs certified? incompatible conform to conform to conform to conform to
Maker ADI ADI ADI ADI ADI
package instruction SSOP, SSOP, SSOP, SSOP, SSOP,
Reach Compliance Code not_compliant compliant compliant compliant compliant
Analog Integrated Circuits - Other Types SWITCHING REGULATOR SWITCHING REGULATOR SWITCHING REGULATOR SWITCHING REGULATOR SWITCHING REGULATOR
control mode CURRENT-MODE CURRENT-MODE CURRENT-MODE CURRENT-MODE CURRENT-MODE
Control Technology PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION
Maximum input voltage 13 V 13.5 V 13.5 V 13.5 V 13.5 V
Minimum input voltage 3.6 V 3 V 3 V 3 V 3 V
Nominal input voltage 10 V 10 V 10 V 10 V 10 V
JESD-30 code R-PDSO-G16 R-PDSO-G16 R-PDSO-G16 R-PDSO-G20 R-PDSO-G20
JESD-609 code e0 e3 e3 e3 e3
length 4.9 mm 4.9 mm 4.9 mm 8.65 mm 8.65 mm
Humidity sensitivity level 1 1 1 1 1
Number of functions 1 1 1 1 1
Number of terminals 16 16 16 20 20
Maximum operating temperature 85 °C 70 °C 70 °C 70 °C 70 °C
Maximum output current 1.2 A 1.2 A 1.2 A 1.2 A 1.2 A
Package body material PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code SSOP SSOP SSOP SSOP SSOP
Package shape RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR
Package form SMALL OUTLINE, SHRINK PITCH SMALL OUTLINE, SHRINK PITCH SMALL OUTLINE, SHRINK PITCH SMALL OUTLINE, SHRINK PITCH SMALL OUTLINE, SHRINK PITCH
Peak Reflow Temperature (Celsius) 235 260 260 260 250
Certification status Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified
Maximum seat height 1.75 mm 1.75 mm 1.75 mm 1.75 mm 1.75 mm
surface mount YES YES YES YES YES
Switch configuration BUCK BUCK BUCK BUCK BUCK
Maximum switching frequency 142 kHz 700 kHz 700 kHz 700 kHz 700 kHz
Temperature level INDUSTRIAL COMMERCIAL COMMERCIAL COMMERCIAL COMMERCIAL
Terminal surface Tin/Lead (Sn/Pb) MATTE TIN Matte Tin (Sn) MATTE TIN Matte Tin (Sn)
Terminal form GULL WING GULL WING GULL WING GULL WING GULL WING
Terminal pitch 0.635 mm 0.635 mm 0.635 mm 0.635 mm 0.635 mm
Terminal location DUAL DUAL DUAL DUAL DUAL
Maximum time at peak reflow temperature 20 30 30 30 NOT SPECIFIED
width 3.9116 mm 3.9 mm 3.9 mm 3.9 mm 3.9 mm
Brand Name - Analog Devices Inc Analog Devices Inc Analog Devices Inc Analog Devices Inc
Is it lead-free? - Contains lead Contains lead Contains lead Contains lead
Contacts - 16 16 20 20
Manufacturer packaging code - 05-08-1641 (GN16) 05-08-1641 (GN16) 05-08-1641 (GN20) 05-08-1641 (GN20)
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