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LTC1266IS-3.3#TR

Description
Switching Regulator LTC1266 - Synchronous Regulator Controller for N- or P-Channel MOSFETs
CategoryPower/power management    The power supply circuit   
File Size243KB,20 Pages
ManufacturerADI
Websitehttps://www.analog.com
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LTC1266IS-3.3#TR Overview

Switching Regulator LTC1266 - Synchronous Regulator Controller for N- or P-Channel MOSFETs

LTC1266IS-3.3#TR Parametric

Parameter NameAttribute value
Is it Rohs certified?incompatible
MakerADI
package instructionSOP,
Reach Compliance Codecompliant
ECCN codeEAR99
Analog Integrated Circuits - Other TypesSWITCHING CONTROLLER
control modeCURRENT-MODE
Control TechnologyCONSTANT OFF TIME
Maximum input voltage18 V
Minimum input voltage3.5 V
Nominal input voltage10 V
JESD-30 codeR-PDSO-G16
JESD-609 codee0
length9.9 mm
Humidity sensitivity level1
Number of functions1
Number of terminals16
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Nominal output voltage3.3 V
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Peak Reflow Temperature (Celsius)255
Certification statusNot Qualified
Maximum seat height1.752 mm
surface mountYES
Switch configurationPUSH-PULL
Maximum switching frequency400 kHz
technologyCMOS
Temperature levelINDUSTRIAL
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
Maximum time at peak reflow temperature40
width3.9 mm
LTC1266
LTC1266-3.3/LTC1266-5
Synchronous Regulator
Controller for
N- or P-Channel MOSFETs
FEATURES
s
s
DESCRIPTIO
s
s
s
s
s
s
s
s
s
s
s
s
Ultrahigh Efficiency: Over 95% Possible
Drives N-Channel MOSFET for High Current or
P-Channel MOSFET for Low Dropout
Pin Selectable Burst Mode Operation
1% Output Accuracy (LTC1266A)
Pin Selectable Phase of Topside Driver for Boost
or Step-Down Operation
Wide V
IN
Range: 3.5V to 20V
On-Chip Low-Battery Detector
High Efficiency Maintained Over Large Current Range
Low 170µA Standby Current at Light Loads
Current Mode Operation for Excellent Line and Load
Transient Response
Logic Controlled Micropower Shutdown: I
Q
< 40µA
Short-Circuit Protection
Synchronous Switching with Nonoverlaping Gate Drives
Available in 16-Pin Narrow SO Package
The LTC
®
1266 series is a family of synchronous switching
regulator controllers featuring automatic Burst Mode
TM
operation to maintain high efficiencies at low output
currents. These devices drive external power MOSFETs at
switching frequencies up to 400kHz using a constant off-
time current mode architecture providing constant ripple
current in the inductor. They can drive either an N-channel
or a P-channel topside MOSFET.
The operating current level is user-programmable via an
external current sense resistor. Wide input supply range
allows operation from 3.5V to 18V (20V maximum).
Constant off-time architecture provides low dropout regu-
lation limited only by the R
DS(ON)
of the topside MOSFET
(when using the P-channel) and the resistance of the
inductor and current sense resistor.
The LTC1266 series combines synchronous switching for
maximum efficiency at high currents with an automatic
low current operating mode, called Burst Mode operation,
which reduces switching losses. Standby power is re-
duced to only 1mW at V
IN
= 5V (at I
OUT
= 0). Load currents
in Burst Mode operation are typically 0mA to 500mA.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode is a trademark of Linear Technology Corporation.
APPLICATIO S
s
s
s
s
s
Notebook and Palmtop Computers
Portable Instruments
Cellular Telephones
DC Power Distribution Systems
GPS Systems
TYPICAL APPLICATIO
V
IN
4V TO 9V
D2
MBR0530T1
+
C
IN
100µF
×2
LOW BAT OUT
V
IN
LB
IN
PINV
PWR V
IN
LB
OUT
TDRIVE
SENSE
+
SENSE
BDRIVE
PGND
1000pF
N-CHANNEL
Si9410
D1
MBRS130LT3
1266 TA01
C
B
0.1µF
N-CHANNEL
Si9410
L*
5µH
100k
LOW BAT IN
LTC1266-3.3
0V = NORMAL
>1.5V = SHUTDOWN
R
C
470Ω
C
C
3300pF
SHDN
I
TH
C
T
BINH
SGND
V
OUT
3.3V
5A
EFFICIENCY (%)
R
SENSE
0.02Ω
+
C
T
180pF
C
OUT
330µF
×
2
*TOKO 919AS-4R7M
Figure 1. High Efficiency Step-Down Converter
U
LTC1266-3.3 Efficiency
100
V
IN
= 5V
95
90
85
80
0.01
0.1
1
LOAD CURRENT (A)
5
1266 TA02
U
U
1

LTC1266IS-3.3#TR Related Products

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Description Switching Regulator LTC1266 - Synchronous Regulator Controller for N- or P-Channel MOSFETs Switching Voltage Regulators LTC1266 - Synchronous Regulator Controller for N- or P-Channel MOSFETs Switching Voltage Regulators LTC1266 - Synchronous Regulator Controller for N- or P-Channel MOSFETs Switching Voltage Regulators LTC1266 - Synchronous Regulator Controller for N- or P-Channel MOSFETs Switching Voltage Regulators LTC1266 - Synchronous Regulator Controller for N- or P-Channel MOSFETs Switching Voltage Regulators LTC1266 - Synchronous Regulator Controller for N- or P-Channel MOSFETs Switching Regulator LTC1266 - Synchronous Regulator Controller for N- or P-Channel MOSFETs Switching Regulator LTC1266 - Synchronous Regulator Controller for N- or P-Channel MOSFETs Switching Regulator LTC1266 - Synchronous Regulator Controller for N- or P-Channel MOSFETs
Is it Rohs certified? incompatible incompatible incompatible incompatible incompatible incompatible incompatible incompatible incompatible
package instruction SOP, SOP, 0.150 INCH, PLASTIC, SOP-16 SOP, SOP, SOP, SOP, SOP, SOP,
Reach Compliance Code compliant not_compliant not_compliant not_compliant not_compliant compliant not_compliant not_compliant compliant
ECCN code EAR99 EAR99 EAR99 EAR99 EAR99 EAR99 EAR99 EAR99 EAR99
Analog Integrated Circuits - Other Types SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER
control mode CURRENT-MODE CURRENT-MODE CURRENT-MODE CURRENT-MODE CURRENT-MODE CURRENT-MODE CURRENT-MODE CURRENT-MODE CURRENT-MODE
Control Technology CONSTANT OFF TIME CONSTANT OFF TIME CONSTANT OFF TIME CONSTANT OFF TIME CONSTANT OFF TIME CONSTANT OFF TIME CONSTANT OFF TIME CONSTANT OFF TIME CONSTANT OFF TIME
Maximum input voltage 18 V 18 V 18 V 18 V 18 V 18 V 18 V 18 V 18 V
Minimum input voltage 3.5 V 3.5 V 3.5 V 3.5 V 3.5 V 3.5 V 3.5 V 3.5 V 3.5 V
Nominal input voltage 10 V 10 V 10 V 10 V 10 V 10 V 10 V 10 V 10 V
JESD-30 code R-PDSO-G16 R-PDSO-G16 R-PDSO-G16 R-PDSO-G16 R-PDSO-G16 R-PDSO-G16 R-PDSO-G16 R-PDSO-G16 R-PDSO-G16
JESD-609 code e0 e0 e0 e0 e0 e0 e0 e0 e0
length 9.9 mm 9.9 mm 9.9 mm 9.9 mm 9.9 mm 9.9 mm 9.9 mm 9.9 mm 9.9 mm
Humidity sensitivity level 1 1 1 1 1 1 1 1 1
Number of functions 1 1 1 1 1 1 1 1 1
Number of terminals 16 16 16 16 16 16 16 16 16
Maximum operating temperature 85 °C 70 °C 70 °C 70 °C 70 °C 85 °C 85 °C 70 °C 85 °C
Package body material PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code SOP SOP SOP SOP SOP SOP SOP SOP SOP
Package shape RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR
Package form SMALL OUTLINE SMALL OUTLINE SMALL OUTLINE SMALL OUTLINE SMALL OUTLINE SMALL OUTLINE SMALL OUTLINE SMALL OUTLINE SMALL OUTLINE
Peak Reflow Temperature (Celsius) 255 235 235 235 235 255 235 235 255
Certification status Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified
Maximum seat height 1.752 mm 1.752 mm 1.752 mm 1.752 mm 1.752 mm 1.752 mm 1.752 mm 1.752 mm 1.752 mm
surface mount YES YES YES YES YES YES YES YES YES
Switch configuration PUSH-PULL PUSH-PULL PUSH-PULL PUSH-PULL PUSH-PULL PUSH-PULL PUSH-PULL PUSH-PULL PUSH-PULL
Maximum switching frequency 400 kHz 400 kHz 400 kHz 400 kHz 400 kHz 400 kHz 400 kHz 400 kHz 400 kHz
technology CMOS CMOS CMOS CMOS CMOS CMOS CMOS CMOS CMOS
Temperature level INDUSTRIAL COMMERCIAL COMMERCIAL COMMERCIAL COMMERCIAL INDUSTRIAL INDUSTRIAL COMMERCIAL INDUSTRIAL
Terminal surface Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) TIN LEAD Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb)
Terminal form GULL WING GULL WING GULL WING GULL WING GULL WING GULL WING GULL WING GULL WING GULL WING
Terminal pitch 1.27 mm 1.27 mm 1.27 mm 1.27 mm 1.27 mm 1.27 mm 1.27 mm 1.27 mm 1.27 mm
Terminal location DUAL DUAL DUAL DUAL DUAL DUAL DUAL DUAL DUAL
Maximum time at peak reflow temperature 40 20 20 20 20 40 20 20 40
width 3.9 mm 3.9 mm 3.9 mm 3.9 mm 3.9 mm 3.9 mm 3.9 mm 3.9 mm 3.9 mm
Maker ADI ADI ADI - - ADI ADI - ADI
Nominal output voltage 3.3 V 1.25 V 3.3 V 1.25 V 5 V 5 V 3.3 V 5 V -
Maximum supply current (Isup) - 3 mA 3 mA 3 mA 3 mA - - 3 mA -
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