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LTC1625CGN

Description
2 A SWITCHING CONTROLLER, 150 kHz SWITCHING FREQ-MAX, PDSO16
CategoryPower/power management    The power supply circuit   
File Size345KB,24 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Related ProductsFound9parts with similar functions to LTC1625CGN
Download Datasheet Parametric Compare View All

LTC1625CGN Overview

2 A SWITCHING CONTROLLER, 150 kHz SWITCHING FREQ-MAX, PDSO16

LTC1625CGN Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?incompatible
MakerLinear ( ADI )
Parts packaging codeSSOP
package instructionSSOP, SSOP16,.25
Contacts16
Manufacturer packaging codeGN
Reach Compliance Codenot_compliant
ECCN codeEAR99
Analog Integrated Circuits - Other TypesSWITCHING CONTROLLER
control modeCURRENT-MODE
Maximum input voltage36 V
Minimum input voltage3.7 V
Nominal input voltage15 V
JESD-30 codeR-PDSO-G16
JESD-609 codee0
length4.8895 mm
Humidity sensitivity level1
Number of functions1
Number of terminals16
Maximum operating temperature70 °C
Minimum operating temperature
Maximum output current2 A
Maximum output voltage36 V
Minimum output voltage1.19 V
Package body materialPLASTIC/EPOXY
encapsulated codeSSOP
Encapsulate equivalent codeSSOP16,.25
Package shapeRECTANGULAR
Package formSMALL OUTLINE, SHRINK PITCH
Peak Reflow Temperature (Celsius)235
Certification statusNot Qualified
Maximum seat height1.727 mm
surface mountYES
Switch configurationBUCK
Maximum switching frequency165 kHz
technologyCMOS
Temperature levelCOMMERCIAL
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formGULL WING
Terminal pitch0.635 mm
Terminal locationDUAL
Maximum time at peak reflow temperature20
width3.899 mm
Base Number Matches1
LTC1625
No R
SENSE
TM
Current Mode
Synchronous Step-Down
Switching Regulator
FEATURES
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
DESCRIPTION
The LTC
®
1625 is a synchronous step-down switching
regulator controller that drives external N-Channel power
MOSFETs using few external components. Current mode
control with MOSFET V
DS
sensing eliminates the need for
a sense resistor and improves efficiency. The frequency of
a nominal 150kHz internal oscillator can be synchronized
to an external clock over a 1.5:1 frequency range.
Burst Mode
TM
operation at low load currents reduces
switching losses and low dropout operation extends oper-
ating time in battery-powered systems. A forced continu-
ous mode control pin can assist secondary winding
regulation by disabling Burst Mode operation when the
main output is lightly loaded.
Fault protection is provided by foldback current limiting
and an output overvoltage comparator. An external ca-
pacitor attached to the RUN/SS pin provides soft start
capability for supply sequencing. A wide supply range
allows operation from 3.7V (3.9V for LTC1625I) to 36V at
the input and 1.19V to V
IN
at the output.
, LTC and LT are registered trademarks of Linear Technology Corporation.
No R
SENSE
and Burst Mode are trademarks of Linear Technology Corporation.
Highest Efficiency Current Mode Controller
No Sense Resistor Required
Stable High Current Operation
Dual N-Channel MOSFET Synchronous Drive
Wide V
IN
Range: 3.7V to 36V
Wide V
OUT
Range: 1.19V to V
IN
±1%
1.19V Reference
Programmable Fixed Frequency with Injection Lock
Very Low Drop Out Operation: 99% Duty Cycle
Forced Continuous Mode Control Pin
Optional Programmable Soft Start
Pin Selectable Output Voltage
Foldback Current Limit
Output Overvoltage Protection
Logic Controlled Micropower Shutdown: I
Q
< 30µA
Available in 16-Lead Narrow SSOP and SO Packages
APPLICATIONS
s
s
s
s
Notebook and Palmtop Computers, PDAs
Cellular Telephones and Wireless Modems
Battery Chargers
Distributed Power
TYPICAL APPLICATION
Efficiency vs Load Current
SYNC
C
SS
0.1µF
RUN/SS
LTC1625
I
TH
R
C
10k
C
C
2.2nF
SW
BOOST
V
PROG
INTV
CC
SGND
BG
D
B
CMDSH-3
C
B
0.22µF
C
VCC
4.7µF
D1
MBRS140T3
M2
Si4410DY
V
IN
TK
TG
M1
Si4410DY
L1
10µH
C
IN
10µF
30V
×
2
V
IN
5V TO
28V
100
V
IN
= 10V
V
OUT
= 5V
+
+
+
V
OUT
3.3V
C
OUT
4.5A
100µF
10V
×
3
EFFICIENCY (%)
V
OSENSE
PGND
1625 F01
Figure 1. High Efficiency Step-Down Converter
U
U
U
90
V
OUT
= 3.3V
80
70
60
0.01
0.1
1
LOAD CURRENT (A)
10
1625 TA01
1

LTC1625CGN Related Products

LTC1625CGN LTC1625IS LTC1625IGN LTC1625I LTC1625CS LTC1625 LTC1625C
Description 2 A SWITCHING CONTROLLER, 150 kHz SWITCHING FREQ-MAX, PDSO16 2 A SWITCHING CONTROLLER, 150 kHz SWITCHING FREQ-MAX, PDSO16 2 A SWITCHING CONTROLLER, 150 kHz SWITCHING FREQ-MAX, PDSO16 2 A SWITCHING CONTROLLER, 150 kHz SWITCHING FREQ-MAX, PDSO16 2 A SWITCHING CONTROLLER, 150 kHz SWITCHING FREQ-MAX, PDSO16 2 A SWITCHING CONTROLLER, 150 kHz SWITCHING FREQ-MAX, PDSO16 2 A SWITCHING CONTROLLER, 150 kHz SWITCHING FREQ-MAX, PDSO16
control mode CURRENT-MODE CURRENT-MODE CURRENT-MODE PEAK CURRENT CURRENT-MODE PEAK CURRENT PEAK CURRENT
Number of functions 1 1 1 1 1 1 1
Number of terminals 16 16 16 16 16 16 16
Maximum operating temperature 70 °C 85 °C 85 °C 85 Cel 70 °C 85 Cel 85 Cel
Minimum operating temperature - -40 °C -40 °C -40 Cel - -40 Cel -40 Cel
Maximum output current 2 A 2 A 2 A 2 A 2 A 2 A 2 A
surface mount YES YES YES Yes YES Yes Yes
Switch configuration BUCK BUCK BUCK BUCK BUCK BUCK BUCK
Maximum switching frequency 165 kHz 165 kHz 165 kHz 150 kHz 165 kHz 150 kHz 150 kHz
Temperature level COMMERCIAL INDUSTRIAL INDUSTRIAL INDUSTRIAL COMMERCIAL INDUSTRIAL INDUSTRIAL
Terminal form GULL WING GULL WING GULL WING GULL WING GULL WING GULL WING GULL WING
Terminal location DUAL DUAL DUAL DUAL DUAL DUAL DUAL
Brand Name Linear Technology Linear Technology Linear Technology - Linear Technology - -
Is it Rohs certified? incompatible incompatible incompatible - incompatible - -
Maker Linear ( ADI ) Linear ( ADI ) Linear ( ADI ) - Linear ( ADI ) - -
Parts packaging code SSOP SOIC SSOP - SOIC - -
package instruction SSOP, SSOP16,.25 SOP, SOP16,.25 SSOP, SSOP16,.25 - SOP, SOP16,.25 - -
Contacts 16 16 16 - 16 - -
Manufacturer packaging code GN S GN - S - -
Reach Compliance Code not_compliant not_compliant not_compliant - not_compliant - -
ECCN code EAR99 EAR99 EAR99 - EAR99 - -
Analog Integrated Circuits - Other Types SWITCHING CONTROLLER SWITCHING CONTROLLER SWITCHING CONTROLLER - SWITCHING CONTROLLER - -
Maximum input voltage 36 V 36 V 36 V - 36 V - -
Minimum input voltage 3.7 V 3.7 V 3.7 V - 3.7 V - -
Nominal input voltage 15 V 15 V 15 V - 15 V - -
JESD-30 code R-PDSO-G16 R-PDSO-G16 R-PDSO-G16 - R-PDSO-G16 - -
JESD-609 code e0 e0 e0 - e0 - -
length 4.8895 mm 9.9 mm 4.8895 mm - 9.9 mm - -
Humidity sensitivity level 1 1 1 - 1 - -
Maximum output voltage 36 V 36 V 36 V - 36 V - -
Minimum output voltage 1.19 V 1.19 V 1.19 V - 1.19 V - -
Package body material PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY - PLASTIC/EPOXY - -
encapsulated code SSOP SOP SSOP - SOP - -
Encapsulate equivalent code SSOP16,.25 SOP16,.25 SSOP16,.25 - SOP16,.25 - -
Package shape RECTANGULAR RECTANGULAR RECTANGULAR - RECTANGULAR - -
Package form SMALL OUTLINE, SHRINK PITCH SMALL OUTLINE SMALL OUTLINE, SHRINK PITCH - SMALL OUTLINE - -
Peak Reflow Temperature (Celsius) 235 235 235 - 235 - -
Certification status Not Qualified Not Qualified Not Qualified - Not Qualified - -
Maximum seat height 1.727 mm 1.75 mm 1.727 mm - 1.75 mm - -
technology CMOS CMOS CMOS - CMOS - -
Terminal surface Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) - Tin/Lead (Sn/Pb) - -
Terminal pitch 0.635 mm 1.27 mm 0.635 mm - 1.27 mm - -
Maximum time at peak reflow temperature 20 20 20 - 20 - -
width 3.899 mm 3.9 mm 3.899 mm - 3.9 mm - -
Base Number Matches 1 1 1 - 1 - -

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