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LTC1551CS8-4.1#TR

Description
Switching Regulator LTC1551 - Low Noise, Switched Capacitor-Regulated Voltage Inverters
CategoryPower/power management    The power supply circuit   
File Size285KB,12 Pages
ManufacturerADI
Websitehttps://www.analog.com
Download Datasheet Parametric Compare View All

LTC1551CS8-4.1#TR Overview

Switching Regulator LTC1551 - Low Noise, Switched Capacitor-Regulated Voltage Inverters

LTC1551CS8-4.1#TR Parametric

Parameter NameAttribute value
Is it Rohs certified?incompatible
MakerADI
package instructionSOP,
Reach Compliance Codecompliant
ECCN codeEAR99
Analog Integrated Circuits - Other TypesSWITCHED CAPACITOR REGULATOR
Maximum input voltage6.5 V
Minimum input voltage4.5 V
Nominal input voltage5 V
JESD-30 codeR-PDSO-G8
JESD-609 codee0
length4.9 mm
Humidity sensitivity level1
Number of functions1
Number of terminals8
Maximum operating temperature70 °C
Minimum operating temperature
Nominal output voltage-4.1 V
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Peak Reflow Temperature (Celsius)235
Certification statusNot Qualified
Maximum seat height1.75 mm
Maximum supply current (Isup)7 mA
surface mountYES
Switch configurationSINGLE
Maximum switching frequency900 kHz
technologyCMOS
Temperature levelCOMMERCIAL
Terminal surfaceTIN LEAD
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
Maximum time at peak reflow temperature20
width3.9116 mm
LTC1550/LTC1551
Low Noise, Switched
Capacitor Regulated
Voltage Inverters
FEATURES
s
s
s
s
s
s
s
s
s
s
DESCRIPTION
The LTC
®
1550/LTC1551 are switched capacitor charge
pump voltage inverters which include internal linear post-
regulators to minimize output ripple. Output voltages are
fixed at – 4.1V, with ripple voltages typically below 1mV
P-P
.
The LTC1550 is also available in an adjustable output
voltage version. The LTC1550/LTC1551 are ideal for use
as bias voltage generators for GaAs transmitter FETs in
portable RF and cellular telephone applications.
The LTC1550/LTC1551 operate from single 4.5V to 6.5V
supplies and draw typical quiescent currents of 4.25mA
with a 5V supply. Each device includes a TTL compatible
Shutdown pin which drops supply current to 0.2µA typi-
cally. The LTC1550 Shutdown pin is active low (SHDN),
while the LTC1551 Shutdown pin is active high (SHDN).
Only four external components are required: an input bypass
capacitor, two 0.1µF charge pump capacitors and a filter
capacitor at the linear regulator output. The adjustable LTC1550
requires two additional resistors to set the output voltage. The
LTC1550/LTC1551 will supply up to 10mA output current
with a 5V supply, while maintaining guaranteed output
regulation of
±5%.
The fixed voltage LTC1550/LTC1551 are available in S0-8
plastic packages. The adjustable LTC1550 is available in a
16-pin SSOP.
Regulated Negative Voltage from a Single
Positive Supply
Low Output Ripple: Less Than 1mV
P-P
Typ
High Charge Pump Frequency: 900kHz Typ
Small Charge Pump Capacitors: 0.1µF
Requires Only Four External Capacitors
Fixed – 4.1V or Adjustable Output
Shutdown Mode Drops Supply Current to < 1µA
High Output Current: Up to 10mA, V
CC
= 5V
Output Regulation: 5%
Available in SO-8 and 16-Lead SSOP
APPLICATIONS
s
s
s
s
GaAs FET Bias Generators
Negative Supply Generators
Battery-Powered Systems
Single Supply Applications
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATION
– 4.1V Generator with 1mV
P-P
Noise
V
CC
1
2
SHDN
V
CC
C1
+
V
OUT
SENSE
CP
OUT
LTC1551
3
4
GND
C1
6
5
FERRITE BEAD
C
OUT
10µF
V
OUT
= –4.1V
I
LOAD
= 5mA
C
L
0.1µF
1550/51 F01
V
OUT
Output Noise and Ripple
8
7
C
CP
0.1µF
+
4.7µF
C
IN
V
OUT
AC COUPLED
2mV/DIV
C1
0.1µF
U
U
+
U
10µs/DIV
1550/51 TA02
1

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Description Switching Regulator LTC1551 - Low Noise, Switched Capacitor-Regulated Voltage Inverters Switching Regulator LTC1550 - Low Noise, Switched Capacitor-Regulated Voltage Inverters Switching Regulator LTC1551 - Low Noise, Switched Capacitor-Regulated Voltage Inverters Switching Regulator LTC1550 - Low Noise, Switched Capacitor-Regulated Voltage Inverters
Is it Rohs certified? incompatible incompatible incompatible incompatible
Maker ADI ADI ADI ADI
package instruction SOP, SSOP, SOP, SOP,
Reach Compliance Code compliant not_compliant not_compliant not_compliant
ECCN code EAR99 EAR99 EAR99 EAR99
Analog Integrated Circuits - Other Types SWITCHED CAPACITOR REGULATOR SWITCHED CAPACITOR REGULATOR SWITCHED CAPACITOR REGULATOR SWITCHED CAPACITOR REGULATOR
Maximum input voltage 6.5 V 6.5 V 6.5 V 6.5 V
Minimum input voltage 4.5 V 2.7 V 4.5 V 4.5 V
Nominal input voltage 5 V 5 V 5 V 5 V
JESD-30 code R-PDSO-G8 R-PDSO-G16 R-PDSO-G8 R-PDSO-G8
JESD-609 code e0 e0 e0 e0
length 4.9 mm 4.8895 mm 4.9025 mm 4.9 mm
Humidity sensitivity level 1 1 1 1
Number of functions 1 1 1 1
Number of terminals 8 16 8 8
Maximum operating temperature 70 °C 70 °C 70 °C 70 °C
Package body material PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code SOP SSOP SOP SOP
Package shape RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR
Package form SMALL OUTLINE SMALL OUTLINE, SHRINK PITCH SMALL OUTLINE SMALL OUTLINE
Peak Reflow Temperature (Celsius) 235 235 235 255
Certification status Not Qualified Not Qualified Not Qualified Not Qualified
Maximum seat height 1.75 mm 1.748 mm 1.752 mm 1.75 mm
Maximum supply current (Isup) 7 mA 7 mA 7 mA 7 mA
surface mount YES YES YES YES
Switch configuration SINGLE SINGLE SINGLE SINGLE
Maximum switching frequency 900 kHz 900 kHz 900 kHz 900 kHz
technology CMOS CMOS CMOS CMOS
Temperature level COMMERCIAL COMMERCIAL COMMERCIAL COMMERCIAL
Terminal surface TIN LEAD Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb)
Terminal form GULL WING GULL WING GULL WING GULL WING
Terminal pitch 1.27 mm 0.635 mm 1.27 mm 1.27 mm
Terminal location DUAL DUAL DUAL DUAL
Maximum time at peak reflow temperature 20 20 20 40
width 3.9116 mm 3.899 mm 3.899 mm 3.9116 mm
Nominal output voltage -4.1 V - -4.1 V -4.1 V
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