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LTC1872BES6#TR

Description
IC reg ctrlr bst pwm CM sot23-6
CategoryPower/power management    The power supply circuit   
File Size192KB,12 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Download Datasheet Parametric Compare View All

LTC1872BES6#TR Overview

IC reg ctrlr bst pwm CM sot23-6

LTC1872BES6#TR Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?incompatible
MakerLinear ( ADI )
Parts packaging codeSOT
package instructionLSSOP, TSOP6,.11,37
Contacts6
Manufacturer packaging codeS6
Reach Compliance Code_compli
ECCN codeEAR99
Analog Integrated Circuits - Other TypesSWITCHING CONTROLLER
control modeCURRENT-MODE
Maximum input voltage9.8 V
Minimum input voltage2.5 V
Nominal input voltage4.2 V
JESD-30 codeR-PDSO-G6
JESD-609 codee0
length2.95 mm
Humidity sensitivity level1
Number of functions1
Number of terminals6
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Maximum output current1 A
Package body materialPLASTIC/EPOXY
encapsulated codeLSSOP
Encapsulate equivalent codeTSOP6,.11,37
Package shapeRECTANGULAR
Package formSMALL OUTLINE, LOW PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)255
Certification statusNot Qualified
Maximum seat height1.45 mm
surface mountYES
Switch configurationSINGLE
Maximum switching frequency650 kHz
technologyCMOS
Temperature levelINDUSTRIAL
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formGULL WING
Terminal pitch0.95 mm
Terminal locationDUAL
Maximum time at peak reflow temperature40
width1.625 mm
LTC1872B
Constant Frequency
Current Mode Step-Up
DC/DC Controller in ThinSOT
FEATURES
s
s
s
s
s
s
s
DESCRIPTIO
s
s
Burst Mode
TM
Operation Disabled for Lower Output
Ripple at Light Loads
High Efficiency: Over 90%
High Output Currents Easily Achieved
Wide V
IN
Range: 2.5V to 9.8V
V
OUT
Limited Only by External Components
Constant Frequency 550kHz Operation
Current Mode Operation for Excellent Line and Load
Transient Response
Shutdown Mode Draws Only 8µA Supply Current
Low Profile (1mm) ThinSOT
TM
Package
The LTC
®
1872B is a constant frequency current mode
step-up DC/DC controller providing excellent AC and DC
load and line regulation. The device incorporates an accu-
rate undervoltage lockout feature that shuts down the
LTC1872B when the input voltage falls below 2.0V.
The LTC1872B provides a
±2.5%
output voltage accuracy
and consumes only 270µA of quiescent current. In shut-
down, the device draws a mere 8µA.
High constant operating frequency of 550kHz allows the
use of a small external inductor. The constant frequency
operation is maintained down to very light loads, resulting
in less low frequency noise generation over a wide load
current range.
The LTC1872B is available in a 6-lead low profile (1mm)
ThinSOT package. For a Burst Mode operation enabled
version of the LTC1872B, please refer to the LTC1872 data
sheet.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode and ThinSOT are trademarks of Linear Technology Corporation.
APPLICATIO S
s
s
s
s
s
s
Optical Communications
Lithium-Ion-Powered Applications
Cellular Telephones
Wireless Devices
Portable Computers
Scanners
TYPICAL APPLICATION
R1
0.03Ω
147k
220pF
80.6k
1
I
TH
/RUN
GND
V
FB
V
IN
SENSE
NGATE
422k
C1: TAIYO YUDEN CERAMIC EMK325BJ106MNT
C2: MURATA GRM42-2X5R106K010AL
D1: IR10BQ015
L1: MURATA LQN6C4R7M04
M1: Si2302DS
R1: DALE 0.25W
5
L1
4.7µH
V
OUT
5V
1A
C1
10µF
10V
V
IN
3.3V
100
95
90
EFFICIENCY (%)
85
80
75
70
65
1
10
100
LOAD CURRENT (mA)
1000
1872B TA01b
LTC1872B
2
3
4
6
M1
D1
C2
4× 10µF
10V
1872B TA01
Figure 1. LTC1872B High Output Current 3.3V to 5V Boost Converter
*Output ripple waveforms for the circuit of Figure 1 appear in Figure 2.
U
Typical Efficiency vs Load Current*
V
IN
= 3.3V
V
OUT
= 5V
U
U
1

LTC1872BES6#TR Related Products

LTC1872BES6#TR LTC1872BES6#TRPBF LTC1872BES6#TRM
Description IC reg ctrlr bst pwm CM sot23-6 IC reg ctrlr bst pwm CM sot23-6 IC reg ctrlr bst pwm CM sot23-6
Brand Name Linear Technology Linear Technology Linear Technology
Is it Rohs certified? incompatible conform to incompatible
Maker Linear ( ADI ) Linear ( ADI ) Linear ( ADI )
Parts packaging code SOT SOT SOT
package instruction LSSOP, TSOP6,.11,37 LSSOP, LSSOP,
Contacts 6 6 6
Manufacturer packaging code S6 S6 S6
Reach Compliance Code _compli compli not_compliant
ECCN code EAR99 EAR99 EAR99
Analog Integrated Circuits - Other Types SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER
control mode CURRENT-MODE CURRENT-MODE CURRENT-MODE
Maximum input voltage 9.8 V 9.8 V 9.8 V
Minimum input voltage 2.5 V 2.5 V 2.5 V
Nominal input voltage 4.2 V 4.2 V 4.2 V
JESD-30 code R-PDSO-G6 R-PDSO-G6 R-PDSO-G6
JESD-609 code e0 e3 e0
length 2.95 mm 2.95 mm 2.95 mm
Humidity sensitivity level 1 1 1
Number of functions 1 1 1
Number of terminals 6 6 6
Maximum operating temperature 85 °C 85 °C 85 °C
Minimum operating temperature -40 °C -40 °C -40 °C
Maximum output current 1 A 1 A 1 A
Package body material PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code LSSOP LSSOP LSSOP
Package shape RECTANGULAR RECTANGULAR RECTANGULAR
Package form SMALL OUTLINE, LOW PROFILE, SHRINK PITCH SMALL OUTLINE, LOW PROFILE, SHRINK PITCH SMALL OUTLINE, LOW PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius) 255 260 235
Certification status Not Qualified Not Qualified Not Qualified
Maximum seat height 1.45 mm 1.45 mm 1.45 mm
surface mount YES YES YES
Switch configuration SINGLE SINGLE SINGLE
Maximum switching frequency 650 kHz 650 kHz 650 kHz
Temperature level INDUSTRIAL INDUSTRIAL INDUSTRIAL
Terminal surface Tin/Lead (Sn/Pb) Matte Tin (Sn) Tin/Lead (Sn/Pb)
Terminal form GULL WING GULL WING GULL WING
Terminal pitch 0.95 mm 0.95 mm 0.95 mm
Terminal location DUAL DUAL DUAL
Maximum time at peak reflow temperature 40 30 20
width 1.625 mm 1.625 mm 1.625 mm
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