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SG1844LT

Description
Switching Regulator/Controller, Current-mode, 0.2A, 500kHz Switching Freq-Max, BIPolar, CQCC20
CategoryPower/power management    The power supply circuit   
File Size212KB,12 Pages
ManufacturerMicrosemi
Websitehttps://www.microsemi.com
Download Datasheet Parametric Compare View All

SG1844LT Overview

Switching Regulator/Controller, Current-mode, 0.2A, 500kHz Switching Freq-Max, BIPolar, CQCC20

SG1844LT Parametric

Parameter NameAttribute value
Is it Rohs certified?incompatible
package instructionQCCN, LCC20,.35SQ
Reach Compliance Codenot_compliant
control modeCURRENT-MODE
JESD-30 codeS-XQCC-N20
JESD-609 codee0
Number of terminals20
Maximum operating temperature125 °C
Minimum operating temperature-55 °C
Maximum output current0.2 A
Package body materialCERAMIC
encapsulated codeQCCN
Encapsulate equivalent codeLCC20,.35SQ
Package shapeSQUARE
Package formCHIP CARRIER
Certification statusNot Qualified
surface mountYES
Maximum switching frequency500 kHz
technologyBIPOLAR
Temperature levelMILITARY
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formNO LEAD
Terminal pitch1.27 mm
Terminal locationQUAD
Base Number Matches1
L I N D
O C
# :
1844
SG1844/SG1845 Series
C
URRENT
M
ODE
PWM C
ONTROLLER
T
H E
I
N F I N I T E
P
O W E R
O F
I
N N O VA T I O N
P
R O D U C T I O N
D
A T A
S
H E E T
DESCRIPTION
The SG1844/45 family of control ICs
provides all the necessary features to
implement off-line fixed frequency,
current-mode switching power supplies
with a minimum number of external
components. Current-mode architecture
demonstrates improved line regulation,
improved load regulation, pulse-by-
pulse current limiting and inherent
protection of the power supply output
switch.
The bandgap reference is trimmed to
±1% over temperature. Oscillator
discharge current is trimmed to less than
±10%. The SG1844/45 has under-
voltage lockout, current-limiting circuitry
and start-up current of less than 1mA.
The totem-pole output is optimized to
drive the gate of a power MOSFET. The
output is low in the off state to provide
direct interface to an N-channel device.
Both operate up to a maximum duty
cycle range of zero to <50% due to an
internal toggle flip-flop which blanks the
output off every other clock cycle.
The SG1844/45 is specified for
operation over the full military ambient
temperature range of -55°C to 125°C.
The SG2844/45 is specified for the
industrial range of -25°C to 85°C, and
the SG3844/45 is designed for the
commercial range of 0°C to 70°C.
K E Y F E AT U R E S
s
OPTIMIZED FOR OFF-LINE CONTROL
s
LOW START-UP CURRENT (<1mA)
s
AUTOMATIC FEED FORWARD
COMPENSATION
s
TRIMMED OSCILLATOR DISCHARGE
CURRENT
s
PULSE-BY-PULSE CURRENT LIMITING
s
ENHANCED LOAD RESPONSE
CHARACTERISTICS
s
UNDER-VOLTAGE LOCKOUT WITH 6V
HYSTERESIS (SG1844 only)
s
DOUBLE PULSE SUPPRESSION
s
HIGH-CURRENT TOTEM-POLE OUTPUT
s
INTERNALLY TRIMMED BANDGAP
REFERENCE
s
500kHz OPERATION
s
UNDERVOLTAGE LOCKOUT
SG1844 - 16 volts
SG1845 - 8.4 volts
s
LOW SHOOT-THROUGH CURRENT <75mA
OVER TEMPERATURE
PRODUCT HIGHLIGHT
T
Y P I C A L
A
P P L I C AT I O N
OF
S G 3 8 4 4 I
N
A F
LY B A C K
C
O N V E R T E R
R
ST
HIGH RELIABILITY FEATURES
s
AVAILABLE TO MIL-STD-883B
s
LINFINITY LEVEL "S" PROCESSING AVAILABLE
AC
INPUT
I
ST
V
CC
SG3844
T
A
(°C)
0 to 70
-25 to 85
-55 to 125
MIL-STD/883
DESC
M
8-pin
Plastic DIP
N
PA C K A G E O R D E R I N F O R M AT I O N
Plastic DIP
Plastic SOIC
Plastic SOIC
Ceramic DIP
Ceramic DIP
DM
8-pin
D
14-pin
Y
8-pin
J
14-pin
14-pin
SG3844N
SG3845N
SG2844N
SG2845N
SG3844DM
SG3845DM
SG2844DM
SG2845DM
SG3844D
SG3845D
SG2844D
SG2845D
SG3844Y
SG3845Y
SG2844Y
SG2845Y
SG1844Y
SG1845Y
SG3844J
SG3845J
SG2844J
SG2845J
SG1844J
SG1845J
F
10-pin
Cer. Flatpack
L
20-pin
Ceramic LCC
SG3844M
SG3845M
SG2844M
SG2845M
SG1844L
SG1845L
SG1844L/883B
SG1845L/883B
SG1844Y/883B SG1844J/883B
SG1845Y/883B SG1845J/883B
SG1844Y/DESC SG1844J/DESC
SG1844F/DESC SG1844L/DESC
SG1845F/DESC SG1845L/DESC
SG1845Y/DESC SG1845J/DESC
Note: All surface-mount packages are available in Tape & Reel.
F O R F U R T H E R I N F O R M AT I O N C A L L ( 7 1 4 ) 8 9 8 - 8 1 2 1
Copyright © 2000
Rev. 1.5
4/03
11861 W
ESTERN
A
VENUE
, G
ARDEN
G
ROVE
, CA. 92841
1

SG1844LT Related Products

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Description Switching Regulator/Controller, Current-mode, 0.2A, 500kHz Switching Freq-Max, BIPolar, CQCC20 Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO8, PLASTIC, SOIC-8 Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO14, PLASTIC, SOIC-14 Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO8, PLASTIC, SOIC-8 Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO14, PLASTIC, SOIC-14 Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO8, PLASTIC, SOIC-8 Switching Regulator/Controller, Current-mode, 0.2A, 500kHz Switching Freq-Max, BIPolar, CQCC20 Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO14, PLASTIC, SOIC-14 Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO14, PLASTIC, SOIC-14
Is it Rohs certified? incompatible incompatible incompatible incompatible incompatible incompatible incompatible incompatible incompatible
package instruction QCCN, LCC20,.35SQ SOP, SOP8,.25 SOP, SOP14,.25 SOP, SOP8,.25 SOP, SOP14,.25 SOP, SOP8,.25 QCCN, LCC20,.35SQ SOP, SOP14,.25 SOP, SOP14,.25
Reach Compliance Code not_compliant not_compliant not_compliant not_compliant not_compliant not_compliant not_compliant not_compliant not_compliant
control mode CURRENT-MODE CURRENT-MODE CURRENT-MODE CURRENT-MODE CURRENT-MODE CURRENT-MODE CURRENT-MODE CURRENT-MODE CURRENT-MODE
JESD-30 code S-XQCC-N20 R-PDSO-G8 R-PDSO-G14 R-PDSO-G8 R-PDSO-G14 R-PDSO-G8 S-XQCC-N20 R-PDSO-G14 R-PDSO-G14
JESD-609 code e0 e0 e0 e0 e0 e0 e0 e0 e0
Number of terminals 20 8 14 8 14 8 20 14 14
Maximum operating temperature 125 °C 85 °C 85 °C 70 °C 70 °C 85 °C 125 °C 70 °C 85 °C
Minimum operating temperature -55 °C -25 °C -25 °C - - -25 °C -55 °C - -25 °C
Maximum output current 0.2 A 1 A 1 A 1 A 1 A 1 A 0.2 A 1 A 1 A
Package body material CERAMIC PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY CERAMIC PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code QCCN SOP SOP SOP SOP SOP QCCN SOP SOP
Encapsulate equivalent code LCC20,.35SQ SOP8,.25 SOP14,.25 SOP8,.25 SOP14,.25 SOP8,.25 LCC20,.35SQ SOP14,.25 SOP14,.25
Package shape SQUARE RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR SQUARE RECTANGULAR RECTANGULAR
Package form CHIP CARRIER SMALL OUTLINE SMALL OUTLINE SMALL OUTLINE SMALL OUTLINE SMALL OUTLINE CHIP CARRIER SMALL OUTLINE SMALL OUTLINE
Certification status Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified
surface mount YES YES YES YES YES YES YES YES YES
Maximum switching frequency 500 kHz 500 kHz 500 kHz 500 kHz 500 kHz 500 kHz 500 kHz 500 kHz 500 kHz
technology BIPOLAR BIPOLAR BIPOLAR BIPOLAR BIPOLAR BIPOLAR BIPOLAR BIPOLAR BIPOLAR
Temperature level MILITARY OTHER OTHER COMMERCIAL COMMERCIAL OTHER MILITARY COMMERCIAL OTHER
Terminal surface Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb)
Terminal form NO LEAD GULL WING GULL WING GULL WING GULL WING GULL WING NO LEAD 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 QUAD DUAL DUAL DUAL DUAL DUAL QUAD DUAL DUAL
Parts packaging code - SOIC SOIC SOIC SOIC SOIC - SOIC SOIC
Contacts - 8 14 8 14 8 - 14 14
ECCN code - 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
Control Technology - PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION - PULSE WIDTH MODULATION PULSE WIDTH MODULATION
Maximum input voltage - 25 V 25 V 25 V 25 V 25 V - 25 V 25 V
Minimum input voltage - 12 V 12 V 12 V 12 V 12 V - 12 V 12 V
Nominal input voltage - 15 V 15 V 15 V 15 V 15 V - 15 V 15 V
length - 4.9 mm 8.65 mm 4.9 mm 8.65 mm 4.9 mm - 8.65 mm 8.65 mm
Number of functions - 1 1 1 1 1 - 1 1
Maximum seat height - 1.75 mm 1.75 mm 1.75 mm 1.75 mm 1.75 mm - 1.75 mm 1.75 mm
Switch configuration - SINGLE SINGLE SINGLE SINGLE SINGLE - SINGLE SINGLE
width - 3.9 mm 3.9 mm 3.9 mm 3.9 mm 3.9 mm - 3.9 mm 3.9 mm
Maker - - Microsemi Microsemi Microsemi - Microsemi Microsemi -
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Datasheet   0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
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